CN116426032A - Bagasse cellulose aerogel and preparation method thereof - Google Patents
Bagasse cellulose aerogel and preparation method thereof Download PDFInfo
- Publication number
- CN116426032A CN116426032A CN202310478630.9A CN202310478630A CN116426032A CN 116426032 A CN116426032 A CN 116426032A CN 202310478630 A CN202310478630 A CN 202310478630A CN 116426032 A CN116426032 A CN 116426032A
- Authority
- CN
- China
- Prior art keywords
- bagasse
- cellulose
- solution
- stirring
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000001913 cellulose Substances 0.000 title claims abstract description 138
- 229920002678 cellulose Polymers 0.000 title claims abstract description 138
- 241000609240 Ambelania acida Species 0.000 title claims abstract description 133
- 239000010905 bagasse Substances 0.000 title claims abstract description 133
- 239000004964 aerogel Substances 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 75
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000001035 drying Methods 0.000 claims abstract description 50
- 239000000725 suspension Substances 0.000 claims abstract description 50
- 238000003756 stirring Methods 0.000 claims abstract description 49
- 229920001661 Chitosan Polymers 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 39
- 239000008367 deionised water Substances 0.000 claims abstract description 33
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 33
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims abstract description 25
- 229960002218 sodium chlorite Drugs 0.000 claims abstract description 25
- 238000005406 washing Methods 0.000 claims abstract description 22
- BHTJEPVNHUUIPV-UHFFFAOYSA-N pentanedial;hydrate Chemical compound O.O=CCCCC=O BHTJEPVNHUUIPV-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 105
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 22
- 230000007935 neutral effect Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003063 flame retardant Substances 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract 1
- 239000000499 gel Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- 238000004132 cross linking Methods 0.000 description 9
- 238000009413 insulation Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 125000003277 amino group Chemical group 0.000 description 5
- 239000003431 cross linking reagent Substances 0.000 description 5
- 238000004108 freeze drying Methods 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 125000003172 aldehyde group Chemical group 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000000352 supercritical drying Methods 0.000 description 4
- 238000001157 Fourier transform infrared spectrum Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052596 spinel Inorganic materials 0.000 description 3
- 239000011029 spinel Substances 0.000 description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 3
- 239000011240 wet gel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000000017 hydrogel Substances 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229920001046 Nanocellulose Polymers 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 239000004965 Silica aerogel Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 150000002118 epoxides Chemical group 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003075 superhydrophobic effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
- C08J2201/048—Elimination of a frozen liquid phase
- C08J2201/0484—Elimination of a frozen liquid phase the liquid phase being aqueous
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/02—Foams characterised by their properties the finished foam itself being a gel or a gel being temporarily formed when processing the foamable composition
- C08J2205/026—Aerogel, i.e. a supercritically dried gel
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/05—Open cells, i.e. more than 50% of the pores are open
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2397/00—Characterised by the use of lignin-containing materials
- C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/07—Aldehydes; Ketones
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention relates to bagasse cellulose aerogel and a preparation method thereof. The technical proposal is as follows: drying, crushing and drying the cleaned bagasse to obtain pretreated bagasse; adding chitosan powder into acetic acid solution, and stirring to obtain chitosan solution; placing the pretreated bagasse into a sodium hydroxide solution, stirring under the water bath condition, washing, placing into a sodium chlorite solution, and adjusting the pH; stirring under water bath condition, washing, drying, mixing with deionized water, and making into cellulose suspension. Adding chitosan solution into cellulose suspension, stirring, adding glutaraldehyde water solution, stirring, pouring, placing gel under the condition of-20 to-18 ℃, standing at room temperature, and drying to obtain bagasse cellulose aerogel. The method has simple process and short period, and can prepare products with any size by using a normal pressure drying method; the prepared product has the advantages of low density, good hydrophobicity and excellent flame retardant property, and particularly meets the requirements of high porosity and high strength.
Description
Technical Field
The invention belongs to the technical field of cellulose aerogel. In particular to bagasse cellulose aerogel and a preparation method thereof.
Background
Aerogel has high porosity>95 percent, low density (3-150 mg/cm) 3 ) Low thermal conductivity and large specific surface area (500-1000 m) 2 And/g), can be applied to various fields including heat insulation, pollutant treatment, electromagnetic shielding, sensors, catalysis, energy storage and the like, and is an ideal heat insulation material. At present, most aerogel materials, such as silica aerogel and other traditional aerogels, are commercially applied, but have the defects of poor toughness, difficult molding, high manufacturing cost and the like; the organic polymer aerogel has the advantages of excellent flexibility, easy processing and low cost, but is mostly prepared from non-renewable and non-degradable materials, and the problems of difficult degradation and large pollution limit the wide application.
Cellulose is macromolecular polysaccharide composed of glucose, has abundant content in nature, has the characteristics of green, no pollution, reproducibility and sustainability, contains abundant active hydroxyl groups, can be subjected to crosslinking reaction with water or other crosslinking agents to form hydrogel with a three-dimensional network structure, and is an excellent material for manufacturing aerogel. However, the drying technology in the production of the cellulose aerogel is not satisfactory, and the cellulose aerogel is difficult to have high strength at the same time under the condition of ensuring high porosity, so that large-scale production and application cannot be realized.
Han [ Han Z M, sun W B, yang K P, et al-natural wood-inspired aerogel [ J ]. Angew Chem Int Ed Engl,2022 ] et al prepared lightweight porous cellulose aerogel by freeze-drying using poplar powder as raw material, montmorillonite and sodium alginate as additives, and calcium chloride solution as cross-linking agent. However, this method adopts a freeze-drying process to prepare aerogel, and has complicated procedures, expensive equipment, long period and limited size of the prepared product, thereby limiting practical application.
Ma et al (Ma ZH, han Y, et al Highly effective oil-water separation of superhydrophobic cellulose II aerogel based on dissolution and regeneration of cotton in lithium bromide system [ J ]. Journal ofMolecular Liquids,2022, 367:120543.) prepared lightweight porous cellulose aerogel by freeze-drying using cotton as the starting material and LiBr solution as the solvent. However, the mechanical properties of the prepared cellulose aerogel are poor, and the compressive stress is only 113.2kPa when the deformation amount is 80%; and the freeze drying method has high preparation cost and long period, and is difficult to prepare large-size samples.
Chang Huanjun (Chang Huanjun, zhang Longfei et al) influence of two drying methods on structure and performance of carbon nanotubes/nanocellulose aerogel [ J ]. Wood science and technology, 2022,36 (5): 43-49.) first, carbon nanotubes and cellulose are used as raw materials, and a freeze drying method and a supercritical drying method are used to prepare cellulose aerogel. The cellulose aerogel prepared by the supercritical drying method shows a filamentous porous structure, the pore structure mainly takes mesopores, and compared with a freeze-dried sample, the specific surface area of the prepared cellulose aerogel is improved by 5.6 times, and the pore volume is improved by 5.13 times. Although supercritical drying can keep the mesoporous structure of the cellulose aerogel to the greatest extent and prepare the cellulose aerogel with excellent performance, equipment used by the supercritical drying method is expensive, and an used device is an autoclave and has high requirements on tightness; the process is complicated, and solvent exchange is needed before wet gel drying; the experimental period is long, the yield is lower, the cost is higher, and the method is only suitable for preparing a small amount of high-performance products.
He [ He S, liu C, chi X, et al, bio-inspired lightweight pulp foams with improved mechanical property and flame retardancy viaborate cross-linking [ J ]. Chemical Engineering Journal,2019,371:34-42 ] et al, prepared cellulose aerogel successfully by normal pressure drying using bleached softwood pulp as raw material, borax as cross-linking agent, and sodium dodecyl sulfate as foaming agent. The sample has a compressive strength of 74.1kPa (deformation amount of 50%), and has poor flame retarding and self-extinguishing properties, but the sample has poor strength and cannot meet the daily use.
Li et al [ Li Y, grishkewich N, liu L, et al construction of functional cellulose aerogels via atmospheric drying chemically cross-linked and solvent exchanged cellulose nanofibrils [ J ]].Chemical Engineering Journal,2019,366:531-538.]Glycidoxypropyl trimethoxysilane and branched polyethylenimine are used to increase the strength of the connection between cellulose and acetone is used to replace water in the gel to reduce the surface tension of the solvent. Crosslinking occurs between the silicon hydroxyl groups and the hydroxyl groups generated by hydrolysis of the glycidoxypropyl trimethoxy silane on the surface of cellulose, and meanwhile, strong interaction occurs between epoxide groups of the glycidoxypropyl trimethoxy silane and amine groups of the branched polyethylenimine, so that the crosslinking density of a gel network is increased. The method of acetone solvent exchange is adopted to replace water in the cellulose hydrogel with low surface energy substances, so that the normal pressure drying of the aerogel is realized, and the preparation cost is saved. The atmospheric dried cellulose aerogel had similar densities (58.82 g/cm compared to the freeze dried sample 3 ) 4.3 times the specific surface area (22.4 m 2 /g) and similar compression resilience (50% deformation, 5 compression resilience without significant permanent deformation). However, organic solvents have the disadvantage of being expensive.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and aims to provide a method for preparing bagasse cellulose aerogel with any size by adopting a normal pressure drying method, which has the advantages of simple process, low cost, short period, low requirements on equipment, easy industrial production and high additional value utilization of bagasse; the bagasse cellulose aerogel prepared by the method has low density, good hydrophobicity and excellent flame retardant property, and particularly has high strength while meeting the requirement of high porosity.
In order to achieve the above purpose, the invention adopts the following technical scheme:
step 1, drying the cleaned bagasse in an oven at 80-85 ℃ for 22-24 hours to obtain dried bagasse; and crushing the dried bagasse, washing the crushed bagasse with deionized water for 3 to 5 times, and drying the crushed bagasse at the temperature of between 80 and 90 ℃ for 22 to 24 hours to obtain pretreated bagasse.
And 2, adding chitosan powder into the acetic acid solution according to the concentration of 1.9-2.1 wt%, and stirring for 2-3 hours at the rotating speed of 300-600 rpm to obtain the chitosan solution.
And 3, placing the pretreated bagasse into a sodium hydroxide solution according to the mass ratio of the pretreated bagasse to the sodium hydroxide solution of 1:30-50, stirring for 0.8-1.2 h at a rotating speed of 300-600 rpm under the water bath condition of 80-85 ℃, and washing with deionized water to be neutral to obtain a product A.
Step 4, placing the product A in a sodium chlorite solution according to the mass ratio of the pretreated bagasse to the sodium chlorite solution of 1:30-50, and adjusting the pH value to 4.5-5 by using acetic acid; then moving to 80-85 ℃ water bath condition, stirring for 0.8-1.2 h at 300-600 rpm, washing to neutrality with deionized water, drying for 4-6 h at 80-85 ℃ to obtain cellulose.
And 5, stirring for 12-24 hours at the rotating speed of 300-600 rpm according to the mass ratio of the cellulose to the deionized water of 1:95-97 to prepare the cellulose suspension.
Step 6, adding the chitosan solution into a cellulose suspension, and uniformly stirring to prepare a suspension B; the chitosan solution is 20-60 wt% of the cellulose suspension.
And 7, adding the suspension B into glutaraldehyde water solution according to the mass ratio of the suspension B to glutaraldehyde water solution of 1:0.01-0.055, stirring at the rotating speed of 300-600 rpm for 10-30 s, pouring into a mould, placing the gel in the condition of minus 20-minus 18 ℃ for 45-48 h, taking out, standing at room temperature for 12-24 h, and drying in an oven at 80-85 ℃ for 20-24 h to obtain bagasse cellulose aerogel.
The concentration of the acetic acid solution is 0.9-1.1 wt%.
The concentration of the sodium hydroxide solution is 2-3 wt%.
The concentration of the sodium chlorite solution is 2-3 wt%.
The glutaraldehyde content of the glutaraldehyde aqueous solution is 23-27 wt%.
By adopting the technical scheme, compared with the prior art, the invention has the following positive effects and outstanding characteristics:
1. the bagasse is used as a raw material, and the bagasse cellulose is extracted by an acid-base soaking etching method, so that the raw material sources are wide and concentrated, and the high value-added utilization of the bagasse is realized, the cost is low, and the environment is protected; and the cellulose density is low, the cellulose aerogel can be degraded, and the prepared bagasse cellulose aerogel is low in density and environment-friendly.
2. According to the invention, chitosan is used as a reinforcing agent, so that the connection strength between fibers is effectively enhanced, and the fibers are prevented from sliding, thereby improving the compression elasticity and compressive strength of the aerogel, and ensuring that the prepared bagasse cellulose aerogel has good hydrophobicity and flame retardance.
3. According to the invention, glutaraldehyde is used as a cross-linking agent, and aldehyde groups of glutaraldehyde are respectively and firmly connected with amino groups of chitosan and hydroxyl groups on the surface of cellulose in a cross-linking manner, so that collapse of an aerogel structure in a normal-pressure drying process is prevented, structural stability of bagasse cellulose aerogel is ensured, and compression elasticity and mechanical properties of the bagasse cellulose aerogel are improved.
4. The invention adopts an ageing mode in a freezing environment, effectively prevents the evaporation of water in gel, ensures that the prepared bagasse cellulose aerogel has higher porosity and lower heat conductivity coefficient, and obviously shortens the preparation period.
5. According to the invention, the cellulose aerogel is prepared by adopting an atmospheric pressure drying method, and the purposes of enhancing the connection between cellulose networks and reducing the capillary force during drying can be achieved by adopting a firmer crosslinking method and increasing the pore diameter of cellulose wet gel, so that the purpose of atmospheric pressure drying can be achieved without solvent exchange. The process is simple, the cost is low, the requirement on equipment is low, the industrial mass production is easy, and the prepared bagasse cellulose aerogel has good mechanical strength and heat insulation performance.
The bagasse cellulose aerogel prepared by the invention is detected by: the volume density is less than or equal to 0.055g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The porosity is more than or equal to 95 percent; the thermal conductivity is less than or equal to 0.06 W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the The compressive strength is not less than 115kPa (50% strain).
Therefore, the invention has the characteristics of simple process, low cost, short period, low requirement on equipment, easy industrial production, high additional value utilization of bagasse and realization of normal pressure drying method for preparing bagasse cellulose aerogel with any size; the prepared bagasse cellulose aerogel has the advantages of small density, good hydrophobicity and excellent flame retardant property, and particularly meets the requirements of high porosity and high strength, and is widely applied to the fields of heat insulation, energy storage and the like.
Drawings
FIG. 1 is a photograph of a bagasse cellulose aerogel prepared according to the present invention;
FIG. 2 is a FT-IR spectrum of the cellulose and bagasse cellulose aerogel shown in FIG. 1.
Detailed Description
The invention is further described in connection with the drawings and the detailed description which follow, without limiting the scope of protection thereof.
Bagasse cellulose aerogel and a preparation method thereof. The preparation method of the specific embodiment comprises the following steps:
step 1, drying the cleaned bagasse in an oven at 80-85 ℃ for 22-24 hours to obtain dried bagasse; and crushing the dried bagasse, washing the crushed bagasse with deionized water for 3 to 5 times, and drying the crushed bagasse at the temperature of between 80 and 90 ℃ for 22 to 24 hours to obtain pretreated bagasse.
And 2, adding chitosan powder into the acetic acid solution according to the concentration of 1.9-2.1 wt%, and stirring for 2-3 hours at the rotating speed of 300-600 rpm to obtain the chitosan solution.
And 3, placing the pretreated bagasse into a sodium hydroxide solution according to the mass ratio of the pretreated bagasse to the sodium hydroxide solution of 1:30-50, stirring for 0.8-1.2 h at a rotating speed of 300-600 rpm under the water bath condition of 80-85 ℃, and washing with deionized water to be neutral to obtain a product A.
Step 4, placing the product A in a sodium chlorite solution according to the mass ratio of the pretreated bagasse to the sodium chlorite solution of 1:30-50, and adjusting the pH value to 4.5-5 by using acetic acid; then moving to 80-85 ℃ water bath condition, stirring for 0.8-1.2 h at 300-600 rpm, washing to neutrality with deionized water, drying for 4-6 h at 80-85 ℃ to obtain cellulose.
And 5, stirring for 12-24 hours at the rotating speed of 300-600 rpm according to the mass ratio of the cellulose to the deionized water of 1:95-97 to prepare the cellulose suspension.
Step 6, adding the chitosan solution into a cellulose suspension, and uniformly stirring to prepare a suspension B; the chitosan solution is 20-60 wt% of the cellulose suspension.
And 7, adding the suspension B into glutaraldehyde water solution according to the mass ratio of the suspension B to glutaraldehyde water solution of 1:0.01-0.055, stirring at the rotating speed of 300-600 rpm for 10-30 s, pouring into a mould, placing the gel in the condition of minus 20-minus 18 ℃ for 45-48 h, taking out, standing at room temperature for 12-24 h, and drying in an oven at 80-85 ℃ for 20-24 h to obtain bagasse cellulose aerogel.
The concentration of the acetic acid solution is 0.9-1.1 wt%.
The concentration of the sodium hydroxide solution is 2-3 wt%.
The concentration of the sodium chlorite solution is 2-3 wt%.
The glutaraldehyde content of the glutaraldehyde aqueous solution is 23-27 wt%.
Example 1
Bagasse cellulose aerogel and a preparation method thereof. The preparation method of the embodiment is as follows:
step 1, drying the cleaned bagasse in an oven at 80 ℃ for 24 hours to obtain dried bagasse; and crushing the dried bagasse, washing 3 times with deionized water, and drying at 80 ℃ for 22 hours to obtain pretreated bagasse.
And 2, adding chitosan powder into the acetic acid solution according to the concentration of 1.9 weight percent, and stirring for 2 hours at the rotating speed of 300rpm to prepare the chitosan solution.
And 3, placing the pretreated bagasse into a sodium hydroxide solution according to the mass ratio of the pretreated bagasse to the sodium hydroxide solution of 1:30, stirring at 300rpm for 0.8h under the water bath condition of 80 ℃, and washing with deionized water to be neutral to obtain a product A.
Step 4, placing the product A in a sodium chlorite solution according to the mass ratio of the pretreated bagasse to the sodium chlorite solution of 1:30, and adjusting the pH value to 4.5 by using acetic acid; then, the mixture was moved to a water bath at 83℃and stirred at 300rpm for 0.8 hours, then washed with deionized water to neutrality, and dried at 83℃for 4 hours to obtain cellulose.
And 5, stirring for 12 hours at a rotating speed of 300rpm according to the mass ratio of the cellulose to the deionized water of 1:95 to obtain a cellulose suspension.
Step 6, adding the chitosan solution into a cellulose suspension, and uniformly stirring to prepare a suspension B; the chitosan solution was 40wt% of the cellulose suspension.
And 7, adding the suspension B into glutaraldehyde water solution according to the mass ratio of the suspension B to glutaraldehyde water solution of 1:0.01, stirring at a rotating speed of 300rpm for 10s, pouring into a mould, placing the gel in a condition of-20 ℃ for 45h, taking out, standing at room temperature for 12h, and drying in an oven at 83 ℃ for 20h to obtain bagasse cellulose aerogel.
The concentration of the acetic acid solution was 0.9wt%.
The concentration of the sodium hydroxide solution was 3wt%.
The concentration of the sodium chlorite solution was 3wt%.
The glutaraldehyde content of the glutaraldehyde aqueous solution was 25wt%.
The bagasse cellulose aerogel prepared in this example was tested: bulk density of 0.055g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The porosity is 96.3%; thermal conductivity of 0.06 W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the Compressive strength 213.4kPa (at 50% strain).
Example 2
Bagasse cellulose aerogel and a preparation method thereof. The preparation method of the embodiment comprises the following specific steps:
step 1, drying the cleaned bagasse in an oven at 85 ℃ for 22 hours to obtain dried bagasse; and crushing the dried bagasse, washing the crushed bagasse with deionized water for 4 times, and drying the crushed bagasse at 83 ℃ for 23 hours to obtain pretreated bagasse.
And 2, adding chitosan powder into the acetic acid solution according to the concentration of 2wt%, and stirring at 400rpm for 2.5h to obtain a chitosan solution.
And 3, placing the pretreated bagasse into a sodium hydroxide solution according to the mass ratio of the pretreated bagasse to the sodium hydroxide solution of 1:50, stirring for 1.0h at 400rpm under the water bath condition of 83 ℃, and washing with deionized water to be neutral to obtain a product A.
Step 4, placing the product A in a sodium chlorite solution according to the mass ratio of the pretreated bagasse to the sodium chlorite solution of 1:50, and adjusting the pH value to 4.7 by using acetic acid; then the mixture is moved to a water bath condition of 85 ℃ and stirred for 0.9h at a rotation speed of 400rpm, then the mixture is washed to be neutral by deionized water, and the mixture is dried for 5h at 84 ℃ to obtain cellulose.
And 5, stirring for 16 hours at a rotating speed of 400rpm according to the mass ratio of the cellulose to the deionized water of 1:97 to obtain a cellulose suspension.
Step 6, adding the chitosan solution into a cellulose suspension, and uniformly stirring to prepare a suspension B; the chitosan solution was 20wt% of the cellulose suspension.
And 7, adding the suspension B into glutaraldehyde water solution according to the mass ratio of the suspension B to glutaraldehyde water solution of 1:0.03, stirring at 400rpm for 20s, pouring into a mold, placing the gel in a condition of-19 ℃ for 46h, taking out, standing for 14h at room temperature, and drying in an oven at 85 ℃ for 21h to obtain bagasse cellulose aerogel.
The concentration of the acetic acid solution was 1.0wt%.
The concentration of the sodium hydroxide solution was 2wt%.
The concentration of the sodium chlorite solution was 2wt%.
The glutaraldehyde content of the glutaraldehyde aqueous solution was 23wt%.
The bagasse cellulose aerogel prepared in this example was tested: bulk density of 0.046g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The porosity is 96.9%; thermal conductivity of 0.052 W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the The compressive strength was 117.8kPa (50% strain).
Example 3
Bagasse cellulose aerogel and a preparation method thereof. The preparation method of the embodiment is as follows:
step 1, drying the cleaned bagasse in an oven at 82 ℃ for 23 hours to obtain dried bagasse; and crushing the dried bagasse, washing with deionized water for 5 times, and drying at 85 ℃ for 24 hours to obtain pretreated bagasse.
And 2, adding chitosan powder into the acetic acid solution according to the concentration of 2.1 weight percent, and stirring for 2 hours at the rotating speed of 500rpm to prepare the chitosan solution.
And 3, placing the pretreated bagasse into a sodium hydroxide solution according to the mass ratio of the pretreated bagasse to the sodium hydroxide solution of 1:40, stirring for 1.1h at a rotating speed of 500rpm under the water bath condition of 85 ℃, and washing with deionized water to be neutral to obtain a product A.
Step 4, placing the product A in a sodium chlorite solution according to the mass ratio of the pretreated bagasse to the sodium chlorite solution of 1:40, and adjusting the pH value to 4.6 by using acetic acid; then the mixture is moved to a water bath condition of 82 ℃ and stirred for 1.0h at a rotating speed of 500rpm, then the mixture is washed to be neutral by deionized water, and the mixture is dried for 6h at 82 ℃ to obtain cellulose.
And 5, stirring for 18 hours at a rotating speed of 500rpm according to the mass ratio of the cellulose to the deionized water of 1:96 to obtain a cellulose suspension.
Step 6, adding the chitosan solution into a cellulose suspension, and uniformly stirring to prepare a suspension B; the chitosan solution was 60wt% of the cellulose suspension.
And 7, adding the suspension B into glutaraldehyde water solution according to the mass ratio of the suspension B to glutaraldehyde water solution of 1:0.04, stirring for 30s at a rotating speed of 500rpm, pouring into a mould, placing the gel in a condition of-18 ℃ for 47h, taking out, standing for 20h at room temperature, and drying in an oven at 82 ℃ for 22h to obtain bagasse cellulose aerogel.
The concentration of the acetic acid solution was 0.9wt%.
The concentration of the sodium hydroxide solution was 3wt%.
The concentration of the sodium chlorite solution was 3wt%.
The glutaraldehyde content of the glutaraldehyde aqueous solution was 24wt%.
The bagasse cellulose aerogel prepared in this example was tested: bulk density of 0.042g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The porosity is 97.2%; thermal conductivity of 0.054W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the Compressive strength 217.8kPa (50% strain).
Example 4
Bagasse cellulose aerogel and a preparation method thereof. The preparation method of the embodiment is as follows:
step 1, drying the cleaned bagasse in an oven at 84 ℃ for 24 hours to obtain dried bagasse; and crushing the dried bagasse, washing 3 times with deionized water, and drying at 88 ℃ for 22 hours to obtain pretreated bagasse.
And 2, adding chitosan powder into the acetic acid solution according to the concentration of 2.1 weight percent, and stirring for 3 hours at the rotating speed of 600rpm to prepare the chitosan solution.
And 3, placing the pretreated bagasse into a sodium hydroxide solution according to the mass ratio of the pretreated bagasse to the sodium hydroxide solution of 1:50, stirring for 1.2 hours at a rotating speed of 600rpm under the water bath condition of 84 ℃, and washing with deionized water to be neutral to obtain a product A.
Step 4, placing the product A in a sodium chlorite solution according to the mass ratio of the pretreated bagasse to the sodium chlorite solution of 1:50, and adjusting the pH value to 4.8 by using acetic acid; then moving to 80 ℃ water bath condition and stirring for 1.1h at 400rpm, then washing to neutrality by deionized water, drying for 4h at 80 ℃ to obtain cellulose.
And 5, stirring for 20 hours at a rotating speed of 400rpm according to the mass ratio of the cellulose to the deionized water of 1:97 to obtain a cellulose suspension.
Step 6, adding the chitosan solution into a cellulose suspension, and uniformly stirring to prepare a suspension B; the chitosan solution was 30wt% of the cellulose suspension.
And 7, adding the suspension B into glutaraldehyde water solution according to the mass ratio of the suspension B to glutaraldehyde water solution of 1:0.055, stirring for 25s at a rotation speed of 400rpm, pouring into a mold, placing the gel in a condition of-18 ℃ for 48h, taking out, standing for 24h at room temperature, and drying in an oven at 80 ℃ for 23h to obtain bagasse cellulose aerogel.
The concentration of the acetic acid solution was 1.1wt%.
The concentration of the sodium hydroxide solution was 2.5wt%.
The concentration of the sodium chlorite solution was 2.5wt%.
The glutaraldehyde content of the glutaraldehyde aqueous solution was 26wt%.
The bagasse cellulose aerogel prepared in this example was tested: bulk density of 0.047g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The porosity is 96.9%; thermal conductivity of 0.055 W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the Compressive strength 218.1kPa (50% strain).
Example 5
Bagasse cellulose aerogel and a preparation method thereof. The preparation method of the embodiment is as follows:
step 1, drying the cleaned bagasse in an oven at 83 ℃ for 23 hours to obtain dried bagasse; and crushing the dried bagasse, washing with deionized water for 5 times, and drying at 90 ℃ for 24 hours to obtain pretreated bagasse.
And 2, adding chitosan powder into the acetic acid solution according to the concentration of 2wt%, and stirring at 400rpm for 2.5h to obtain a chitosan solution.
And 3, placing the pretreated bagasse into a sodium hydroxide solution according to the mass ratio of the pretreated bagasse to the sodium hydroxide solution of 1:30, stirring for 0.9h at a rotating speed of 500rpm under the water bath condition of 82 ℃, and washing with deionized water to be neutral to obtain a product A.
Step 4, placing the product A in a sodium chlorite solution according to the mass ratio of the pretreated bagasse to the sodium chlorite solution of 1:30, and adjusting the pH value to 5 by using acetic acid; then, the mixture is moved to a water bath condition of 84 ℃ and stirred at a rotating speed of 600rpm for 1.2 hours, then the mixture is washed to be neutral by deionized water, and the mixture is dried for 5 hours at 85 ℃ to obtain cellulose.
And 5, stirring for 24 hours at a rotating speed of 600rpm according to the mass ratio of the cellulose to the deionized water of 1:95 to obtain a cellulose suspension.
Step 6, adding the chitosan solution into a cellulose suspension, and uniformly stirring to prepare a suspension B; the chitosan solution was 50wt% of the cellulose suspension.
And 7, adding the suspension B into glutaraldehyde water solution according to the mass ratio of the suspension B to glutaraldehyde water solution of 1:0.025, stirring for 30s at 600rpm, pouring into a mold, placing the gel in a condition of minus 19 ℃ for 48h, taking out, standing for 18h at room temperature, and drying in an oven at 84 ℃ for 24h to obtain bagasse cellulose aerogel.
The concentration of the acetic acid solution was 1wt%.
The concentration of the sodium hydroxide solution was 3wt%.
The concentration of the sodium chlorite solution was 3wt%.
The glutaraldehyde content of the glutaraldehyde aqueous solution was 27wt%.
The bagasse cellulose aerogel prepared in this example was tested: bulk density of 0.047g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The porosity is 97.2%; the thermal conductivity is 0.051 W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the Compressive strength 194.4kPa (50% strain).
Compared with the prior art, the specific embodiment has the following positive effects and outstanding characteristics:
1. the bagasse is used as a raw material, and the bagasse cellulose is extracted by an acid-base soaking etching method, so that the raw material sources are wide and concentrated, and the high value-added utilization of the bagasse, low cost and environmental protection are realized; and the cellulose has low density and can be degraded, so that the bagasse cellulose aerogel with low density, environment friendliness and any size can be prepared.
2. According to the specific embodiment, chitosan is used as a reinforcing agent, so that the connection strength between fibers is effectively enhanced, and the fibers are prevented from sliding, so that the compression elasticity and the compressive strength of the bagasse cellulose aerogel are improved, and the prepared bagasse cellulose aerogel has good hydrophobicity and flame retardance.
3. According to the concrete embodiment, glutaraldehyde is used as a cross-linking agent, aldehyde groups of glutaraldehyde are respectively and firmly connected with amino groups of chitosan and hydroxyl groups on the surface of cellulose in a cross-linking manner, collapse of an aerogel structure in a normal-pressure drying process is prevented, structural stability of bagasse cellulose aerogel is ensured, and therefore compression elasticity and mechanical properties are improved.
4. The invention adopts an ageing mode in a freezing environment, effectively prevents the evaporation of water in gel, has higher porosity and lower heat conductivity coefficient, and obviously shortens the preparation period of bagasse cellulose aerogel.
5. In the specific embodiment, the cellulose aerogel is prepared by adopting an atmospheric pressure drying method, and the purposes of enhancing the connection between cellulose networks and reducing the capillary force during drying can be achieved by adopting a firmer crosslinking method and increasing the pore diameter of cellulose wet gel, so that the aim of atmospheric pressure drying can be achieved without solvent exchange. The process is simple, the cost is low, the requirement on equipment is low, the large-scale industrial production is easy, and the prepared aerogel has good mechanical strength and heat insulation performance. The bagasse cellulose aerogel prepared in this embodiment is shown in fig. 1, and fig. 1 is a physical photograph of the magnesia-alumina spinel aerogel prepared in example 1A sheet; FIG. 2 is a FT-IR spectrum of the cellulose and bagasse cellulose aerogel shown in FIG. 1. From fig. 1, it can be seen intuitively that the prepared magnesia-alumina spinel aerogel is placed on fresh flowers while petals are not bent, which indicates that the prepared magnesia-alumina spinel aerogel has small quality and low density. FIG. 2 is a FT-IR spectrum of the cellulose and cellulose bagasse aerogel shown in FIG. 1. As can be seen from FIG. 2, the bagasse cellulose aerogel was 1570cm -1 There is a distinct peak of difference, which is caused by the carbon-nitrogen double bond, which is formed by the reaction of aldehyde groups in glutaraldehyde and amino groups in chitosan. The strength of the aerogel is derived from the crosslinking reaction of aldehyde groups of glutaraldehyde and hydroxyl groups on the surface of cellulose and amino groups of chitosan. Therefore, the bagasse cellulose aerogel prepared by the specific embodiment has low density, large porosity and high strength, overcomes the problem of low strength of the cellulose aerogel, has good hydrophobicity, excellent flame retardance and excellent heat preservation and insulation performance, and is widely used in the fields of heat insulation, energy storage and the like.
The bagasse cellulose aerogel prepared by the specific embodiment is detected by: the volume density is less than or equal to 0.055g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Porosity of the steel
More than or equal to 95 percent; the thermal conductivity is less than or equal to 0.06 W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the The compressive strength is not less than 115kPa (50% strain).
Therefore, the specific embodiment has the characteristics of simple process, low cost, short period, low requirement on equipment, easy industrial production, high additional value utilization of bagasse and realization of preparing bagasse cellulose aerogel with any size by a normal pressure drying method; the prepared bagasse cellulose aerogel has the advantages of small density, good hydrophobicity and excellent flame retardant property, and particularly meets the requirements of high porosity and high strength, and is widely applied to the fields of heat insulation, energy storage and the like.
Claims (6)
1. The preparation method of the bagasse cellulose aerogel is characterized by comprising the following steps of:
step 1, drying the cleaned bagasse in an oven at 80-85 ℃ for 22-24 hours to obtain dried bagasse; crushing the dried bagasse, washing the crushed bagasse with deionized water for 3 to 5 times, and drying the crushed bagasse at the temperature of between 80 and 90 ℃ for 22 to 24 hours to obtain pretreated bagasse;
step 2, adding chitosan powder into acetic acid solution according to the concentration of 1.9-2.1 wt%, and stirring for 2-3 hours at the rotating speed of 300-600 rpm to obtain chitosan solution;
step 3, placing the pretreated bagasse into a sodium hydroxide solution according to the mass ratio of the pretreated bagasse to the sodium hydroxide solution of 1:30-50, stirring for 0.8-1.2 h at a rotating speed of 300-600 rpm under the water bath condition of 80-85 ℃, and washing with deionized water to be neutral to obtain a product A;
step 4, placing the product A in a sodium chlorite solution according to the mass ratio of the pretreated bagasse to the sodium chlorite solution of 1:30-50, and adjusting the pH value to 4.5-5 by using acetic acid; then moving to 80-85 ℃ water bath condition, stirring for 0.8-1.2 h at 300-600 rpm, washing to neutrality with deionized water, drying for 4-6 h at 80-85 ℃ to obtain cellulose;
step 5, stirring for 12-24 hours at a rotating speed of 300-600 rpm according to the mass ratio of the cellulose to the deionized water of 1:95-97 to prepare a cellulose suspension;
step 6, adding the chitosan solution into a cellulose suspension, and uniformly stirring to prepare a suspension B; the chitosan solution is 20-60 wt% of the cellulose suspension;
and 7, adding the suspension B into glutaraldehyde water solution according to the mass ratio of the suspension B to glutaraldehyde water solution of 1:0.01-0.055, stirring at the rotating speed of 300-600 rpm for 10-30 s, pouring into a mould, placing the gel in the condition of minus 20-minus 18 ℃ for 45-48 h, taking out, standing at room temperature for 12-24 h, and drying in an oven at 80-85 ℃ for 20-24 h to obtain bagasse cellulose aerogel.
2. A process for preparing a bagasse cellulose aerogel as set forth in claim, wherein the concentration of the acetic acid solution is from 0.9 to 1.1% by weight.
3. A process for preparing a bagasse cellulose aerogel as claimed in claim, wherein the concentration of the sodium hydroxide solution is from 2 to 3% by weight.
4. A process for preparing a bagasse cellulose aerogel as set forth in claim, wherein the concentration of the sodium chlorite solution is 2-3 wt.%.
5. A process for preparing a bagasse cellulose aerogel as set forth in claim, wherein the glutaraldehyde content of the glutaraldehyde aqueous solution is 23-27% by weight.
6. Bagasse cellulose aerogel, characterized in that it is produced according to the process for the production of bagasse cellulose aerogel according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310478630.9A CN116426032A (en) | 2023-04-28 | 2023-04-28 | Bagasse cellulose aerogel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310478630.9A CN116426032A (en) | 2023-04-28 | 2023-04-28 | Bagasse cellulose aerogel and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116426032A true CN116426032A (en) | 2023-07-14 |
Family
ID=87087252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310478630.9A Pending CN116426032A (en) | 2023-04-28 | 2023-04-28 | Bagasse cellulose aerogel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116426032A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117023558A (en) * | 2023-08-18 | 2023-11-10 | 东北石油大学 | Controllable preparation method and application of high-strength biomass glycosyl carbon aerogel material |
| CN117023558B (en) * | 2023-08-18 | 2024-05-24 | 东北石油大学 | Controllable preparation method and application of high-strength biomass glycosyl carbon aerogel material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110028682A (en) * | 2019-04-23 | 2019-07-19 | 广西科学院 | A kind of method that mechanical ball mill pretreatment bagasse bleached pulp prepares cellulose base hydrogel |
| CN114702723A (en) * | 2022-04-29 | 2022-07-05 | 中国地质大学（武汉） | Method for preparing cellulose composite aerogel by using reed as raw material |
| CN115124760A (en) * | 2022-06-20 | 2022-09-30 | 江西理工大学 | Super-hydrophobic chitosan hybrid aerogel and preparation method thereof |
-
2023
- 2023-04-28 CN CN202310478630.9A patent/CN116426032A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110028682A (en) * | 2019-04-23 | 2019-07-19 | 广西科学院 | A kind of method that mechanical ball mill pretreatment bagasse bleached pulp prepares cellulose base hydrogel |
| CN114702723A (en) * | 2022-04-29 | 2022-07-05 | 中国地质大学（武汉） | Method for preparing cellulose composite aerogel by using reed as raw material |
| CN115124760A (en) * | 2022-06-20 | 2022-09-30 | 江西理工大学 | Super-hydrophobic chitosan hybrid aerogel and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| BAHADOR BAHRAMI ET AL.: ""Synthesis and characterization of carboxymethyl chitosan superabsorbent hydrogels reinforced with sugarcane bagasse cellulose Nanofibers"", 《MATERIALS RESEARCH EXPRESS》, vol. 6, no. 6, 27 March 2019 (2019-03-27), pages 065320 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117023558A (en) * | 2023-08-18 | 2023-11-10 | 东北石油大学 | Controllable preparation method and application of high-strength biomass glycosyl carbon aerogel material |
| CN117023558B (en) * | 2023-08-18 | 2024-05-24 | 东北石油大学 | Controllable preparation method and application of high-strength biomass glycosyl carbon aerogel material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106867019B (en) | One-pot method for preparing SiO2Method for producing cellulose composite aerogel material | |
| CN108033455B (en) | Preparation method of silicon dioxide aerogel | |
| CN108948377B (en) | Rapid dissolving method of chitosan and application thereof | |
| CN111518309B (en) | Biomass nanocellulose/polypyrrole composite aerogel and preparation method and application thereof | |
| CN111875908B (en) | Self-healing aerogel | |
| CN105153438A (en) | Preparation method of high-strength high-swelling nanocellulose and polyving akohol composite hydrogel | |
| CN111518305B (en) | Preparation method of chitosan gel material | |
| WO2012134378A1 (en) | Cellulose-based materials comprising nanofibrillated cellulose from native cellulose | |
| CN106009031B (en) | A method of improving the mechanical strength of cellulose aerogels | |
| CN111748106B (en) | Chitosan gel material prepared from chitosan solution with pH value of 6-8 and preparation method thereof | |
| CN106750550B (en) | A kind of fire retardant elastic nano-cellulose aerogel and preparation method thereof | |
| CN114854081B (en) | Underwater super-oleophobic lignin/cellulose high-strength aerogel and preparation method and application thereof | |
| CN112898625B (en) | Underwater elastic cellulose aerogel and preparation method and application thereof | |
| CN114605696B (en) | Preparation method of silica/aramid nanofiber multifunctional composite heat-insulation aerogel | |
| CN113683811A (en) | Efficient flame-retardant phosphorylated chitosan aerogel and preparation method thereof | |
| CN114316375B (en) | Hierarchical pore structure composite aerogel and preparation method thereof | |
| CN112480469A (en) | Marine organism polysaccharide-based composite sponge and preparation method and application thereof | |
| CN109867455A (en) | A kind of environmental-friendly glass fiber and its processing technology of high-modulus | |
| CN113526513A (en) | Blocky lignin-silicon dioxide composite aerogel | |
| CN108608537A (en) | A kind of organic and inorganic impregnation method of timber | |
| CN116426032A (en) | Bagasse cellulose aerogel and preparation method thereof | |
| CN112358647A (en) | High-strength polyurethane rigid foam plastic and preparation method thereof | |
| CN105169477A (en) | Preparation method of nano cellulose/chitosan/polycaprolactone porous scaffold | |
| CN113583289A (en) | Plant polysaccharide heat-preservation and heat-insulation aerogel material and preparation method thereof | |
| CN110790976A (en) | Preparation method of chiral nematic porous aerogel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |