CN116607344A - High-yield bamboo cellulose preparation method - Google Patents
High-yield bamboo cellulose preparation method Download PDFInfo
- Publication number
- CN116607344A CN116607344A CN202310713755.5A CN202310713755A CN116607344A CN 116607344 A CN116607344 A CN 116607344A CN 202310713755 A CN202310713755 A CN 202310713755A CN 116607344 A CN116607344 A CN 116607344A
- Authority
- CN
- China
- Prior art keywords
- bamboo
- contact
- cellulose
- preparation
- yield
- 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
- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 125
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 125
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 125
- 241001330002 Bambuseae Species 0.000 title claims abstract description 124
- 239000011425 bamboo Substances 0.000 title claims abstract description 124
- 229920002678 cellulose Polymers 0.000 title claims abstract description 53
- 239000001913 cellulose Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000003513 alkali Substances 0.000 claims abstract description 22
- 238000005406 washing Methods 0.000 claims abstract description 21
- 235000003570 Phyllostachys pubescens Nutrition 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 9
- 244000302661 Phyllostachys pubescens Species 0.000 claims abstract 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 230000007935 neutral effect Effects 0.000 claims description 14
- 239000002023 wood Substances 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002585 base Substances 0.000 claims description 4
- 150000008044 alkali metal hydroxides Chemical group 0.000 claims description 2
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 claims description 2
- 239000012670 alkaline solution Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 28
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000011282 treatment Methods 0.000 abstract description 8
- 238000010306 acid treatment Methods 0.000 abstract description 3
- 239000007864 aqueous solution Substances 0.000 description 17
- 238000002156 mixing Methods 0.000 description 17
- 238000003756 stirring Methods 0.000 description 17
- 241001520913 Phyllostachys edulis Species 0.000 description 15
- 239000008367 deionised water Substances 0.000 description 12
- 229910021641 deionized water Inorganic materials 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 229920005610 lignin Polymers 0.000 description 11
- 229920002488 Hemicellulose Polymers 0.000 description 10
- 238000000605 extraction Methods 0.000 description 7
- 238000000643 oven drying Methods 0.000 description 5
- 238000010298 pulverizing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229920000875 Dissolving pulp Polymers 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 238000002329 infrared spectrum Methods 0.000 description 3
- 238000004537 pulping Methods 0.000 description 3
- 241000011500 Phyllostachys praecox Species 0.000 description 2
- 235000008545 Phyllostachys praecox Nutrition 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 241000209128 Bambusa Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 241000544043 Blyxa aubertii Species 0.000 description 1
- 241000218631 Coniferophyta Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000009874 alkali refining Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- NWIPPCMREQXKRU-UHFFFAOYSA-N ethanol nitrate Chemical compound CCO.[O-][N+]([O-])=O NWIPPCMREQXKRU-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 150000002972 pentoses Chemical class 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The application relates to the technical field of bamboo cellulose, in particular to a preparation method of high-yield bamboo cellulose. The method comprises the following steps: (1) Carrying out first contact on the bamboo material and the acid liquor to obtain a bamboo material product; (2) Carrying out at least one second contact on the bamboo product obtained in the step (1) and alkali liquor, washing and drying to obtain bamboo cellulose; the bamboo is moso bamboo with the bamboo age of 15-180 days; the second contact conditions include: the temperature is 60-80 ℃ and the time is 4-8h. By adopting the moso bamboo with the bamboo age within 6 months and combining the preparation method, the high fiber yield can be achieved by only simple acid treatment and alkali treatment, the quality of the bamboo cellulose can be controlled under mild conditions, the yield can be up to 51.3%, and the alpha-cellulose of the prepared bamboo cellulose can reach 90.08%.
Description
Technical Field
The application relates to the technical field of bamboo cellulose, in particular to a preparation method of high-yield bamboo cellulose.
Background
Cellulose is a renewable natural polymer with the most abundant reserves on earth, is mainly derived from biomass, and is a main component of plant cell walls. The bamboo is rich in cellulose, and the content of the bamboo can reach 40-60% according to different ages of bamboo. China has rich bamboo resources, the area of the bamboo forest is 641.16 ten thousand hectares, and the area of the bamboo forest accounts for one third of the total area of the world, and has the reputation of bamboo kingdom. The bamboos are more than 700 species, wherein 467.78 ten thousand hectares of the phyllostachys pubescens occupy 72.96 percent of the area of the phyllostachys pubescens. In the cellulose extraction process, the cellulose in the bamboo plants is mostly medium and long fibers, and the quality of the bamboo cellulose is equivalent to or even better than that of conifer wood from the analysis of fiber morphology and chemical components. Therefore, developing cellulose dissolving pulp prepared from bamboo is an effective way to solve the problems of insufficient dissolving pulp and wood resource shortage in China. The method takes the bamboo as the second forest resource in the world as the raw material, develops a green new technology of bamboo pulp papermaking, realizes controllable quality of bamboo cellulose, is an effective way for realizing 'taking bamboo as a substitute for wood', and is also a sustainable development way of domestic pulping papermaking industry.
However, due to the fact that the bamboo wood contains more miscellaneous cells (20-50%), the wall thickness of fiber cells and the wall cavity ratio is small, the digestion time is long, the conditions are harsh, the yield of the prepared cellulose is low in the cellulose extraction process, and the impurity removal, refining and purification are difficult. Thus, the bamboo cellulose only accounts for about 2% of the total domestic pulping consumption. Therefore, the separation, extraction and functional modification of the bamboo cellulose are one of effective ways for developing high-added-value bamboo products and improving the technical content and market competitiveness of the bamboo products.
Bamboo cellulose has excellent performance and wide application prospect, and many scientific researchers have conducted related researches on the bamboo cellulose. Liu Yishan and the like, the bleached sulfate bamboo pulp is taken as a raw material, a Baol screening instrument is used for screening to remove the miscellaneous cell components, then the purity of the bleached sulfate bamboo pulp is further improved through hydrolysis treatment and cold alkali refining, and the alpha-cellulose of the obtained bamboo cellulose reaches 95.91 percent, so that the requirements of high-purity dissolving pulp (Paper and Paper Making Vol.39No.6Nov 2020) can be met. CN107988643B, CN101565906A, CN110965382A, CN111021123B et al propose a method for extracting bamboo cellulose. However, the existing bamboo cellulose extraction methods are not designed with control technology and method of cellulose yield, and most of the existing bamboo cellulose extraction methods need complex technologies such as sulfate digestion, bleaching and the like, and in addition, special high-temperature and high-pressure equipment is needed, so that the extraction efficiency is low, and the cost performance of the bamboo cellulose extraction methods is difficult to improve.
Disclosure of Invention
The application aims to provide a preparation method of high-yield bamboo cellulose, which adopts moso bamboos with the age of 6 months, and the yield of the bamboo cellulose can reach 51.3 percent by combining the preparation method of the application, and the alpha-cellulose content in the prepared bamboo cellulose can reach 90.08 percent.
In order to achieve the above object, according to one aspect of the present application, there is provided a method for preparing high yield bamboo cellulose, comprising:
(1) Carrying out first contact on the bamboo material and the acid liquor to obtain a bamboo material product;
(2) Carrying out at least one second contact on the bamboo product obtained in the step (1) and alkali liquor, washing and drying to obtain bamboo cellulose;
the bamboo is moso bamboo with the bamboo age of 15-180 days;
the second contact conditions include: the temperature is 60-80 ℃ and the time is 4-8h.
According to the technical scheme, the moso bamboo with the bamboo age within 6 months is adopted, and the preparation method provided by the application is combined, so that the high fiber yield can be achieved only by simple acid treatment and alkali treatment, the quality of the bamboo cellulose can be controlled under mild conditions, the yield can be up to 51.3%, and the prepared bamboo cellulose alpha-cellulose can reach 90.08%.
Drawings
FIG. 1 is an infrared spectrum of a bamboo fiber sample prepared in examples 1-3;
fig. 2 is an external view of a bamboo fiber sample prepared in example 1;
fig. 3 is an external view of a bamboo fiber sample prepared in example 2;
fig. 4 is an external view of a bamboo fiber sample prepared in example 3.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
In the application, the age of the bamboo material refers to: the bamboo shoots are taken out of the soil until they are cut.
The application provides a preparation method of high-yield bamboo cellulose, which comprises the following steps:
(1) Carrying out first contact on the bamboo material and the acid liquor to obtain a bamboo material product;
(2) Carrying out at least one second contact on the bamboo product obtained in the step (1) and alkali liquor, washing and drying to obtain bamboo cellulose;
the bamboo is moso bamboo with the bamboo age of 15-180 days;
the second contact conditions include: the temperature is 60-80 ℃ and the time is 4-8h. By adopting the moso bamboo with the bamboo age within 6 months and combining the preparation method, the high fiber yield can be achieved by only simple acid treatment and alkali treatment, the quality of the bamboo cellulose can be controlled under mild conditions, the yield can be up to 51.3%, and the alpha-cellulose of the prepared bamboo cellulose can reach 90.08%.
In the present application, the conditions of the first contact are wide in the optional range, and according to a preferred embodiment of the present application, the conditions of the first contact include: the temperature is 15-40 ℃ and the time is 4-8h.
According to a preferred embodiment of the application, after the first contact and the second contact, the bamboo is washed to neutrality.
According to a preferred embodiment of the application, the bamboo is moso bamboo with the age of 10-90 days, which is beneficial to further improving the yield of bamboo cellulose and improving the alpha cellulose content of the bamboo cellulose.
According to a preferred embodiment of the application, the acid liquor has a mass concentration of 4-8wt%; in the acid liquid, the acid is at least one selected from hydrochloric acid and sulfuric acid.
According to a preferred embodiment of the application, the alkaline liquor has a mass concentration of 4-8 wt.%; in the alkaline solution, the base is selected from alkali metal hydroxide and/or alkaline earth metal hydroxide.
According to a preferred embodiment of the application, the base is selected from sodium hydroxide and/or potassium hydroxide.
In the application, the mass ratio of the bamboo wood to the acid liquor is wider in the optional range, and according to a preferred embodiment of the application, the mass ratio of the bamboo wood to the acid liquor is 1:8-20.
In the application, the mass ratio of the bamboo wood to the alkali liquor is wider in optional range, and according to a preferred embodiment of the application, the mass ratio of the bamboo wood to the alkali liquor is 1:5-15.
According to a preferred embodiment of the application, the bamboo product obtained in step (1) is subjected to 1-4 second contacts with alkali liquor.
According to a preferred embodiment of the application, the bamboo product obtained in step (1) is subjected to 3 second contacts with alkali liquor.
According to a preferred embodiment of the application, the 1 st second contact is carried out with a lye mass concentration of 6 to 8 wt.%.
According to a preferred embodiment of the application, the second contact is 2 nd, the concentration of lye is 5-6wt%.
According to a preferred embodiment of the application, the mass concentration of the lye is 4-5 wt.% in the 3 rd second contact.
According to a preferred embodiment of the application, the temperature of the 1 st second contact is 80-90℃for a period of 6-8 hours.
According to a preferred embodiment of the application, the temperature of the second contact 2 is 60-80℃for a period of 6-8 hours.
According to a preferred embodiment of the application, the temperature of the 3 rd second contact is 60-80 ℃ for 4-8 hours.
The present application is further illustrated by the following examples, which are not to be construed as limiting the scope of the application in any way.
The content testing methods of cellulose, hemicellulose and lignin are respectively determined according to the determination of cellulose (the ethanol nitrate method), the determination of pentose (the tetrabromo method) and the determination method of chemical pulp lignin in pulping and papermaking inspection technology.
The method for calculating the yield of the bamboo fiber comprises the following steps: omega Yield rate ＝(m 1 /m 2 ) 100% of formula m 2 Is the mass of the starting materials; m is m 1 The quality of the sample after the sample is dried.
In the following examples, the source of tender phyllostachys praecox is the autonomous felling phyllostachys praecox; the bamboo age is 30-35 days.
Example 1
(1) Pulverizing tender Phyllostachys Pubescens, oven drying, mixing with 5wt% hydrochloric acid aqueous solution at solid-liquid mass ratio of 1:10, and stirring at room temperature for 6 hr.
(2) Washing the product obtained in the step (1) to be neutral, mixing the product with a sodium hydroxide aqueous solution with the mass fraction of 5wt% in a solid-liquid mass ratio of 1:10, heating to 60 ℃, preserving heat and stirring for 7 hours. And washing with deionized water to neutrality and drying to obtain bamboo fiber.
The resulting bamboo fiber sample is shown in fig. 2. The yield of the bamboo cellulose is 51.3%.
The contents of alpha-cellulose, hemicellulose and lignin in the obtained bamboo fiber are shown in table 1.
Example 2
(1) Pulverizing tender Phyllostachys Pubescens, oven drying, mixing with 5wt% hydrochloric acid aqueous solution at solid-liquid mass ratio of 1:10, and stirring at low speed at room temperature for 7 hr.
(2) Washing the sample obtained in the step (1) to be neutral, mixing the sample with a sodium hydroxide aqueous solution with the mass fraction of 5wt% in a solid-liquid mass ratio of 1:10, heating to 60 ℃, preserving heat and stirring for 7 hours, and washing the sample with deionized water to be neutral;
(3) Mixing the product obtained in the step (2) with a sodium hydroxide aqueous solution with the mass fraction of 5wt% at a solid-liquid mass ratio of 1:10, heating to 60 ℃, preserving heat and stirring for 7 hours. Finally, deionized water is used for washing to be neutral and drying is carried out, thus obtaining the bamboo fiber.
The obtained bamboo fiber sample is shown in FIG. 3, and its infrared spectrum is shown in FIG. 1, which shows 1730cm -1 There is a distinct peak due to C=O stretching vibration with hemicellulose and lignin, 1730cm after 2 alkali treatments -1 The peak intensity was significantly reduced, indicating that hemicellulose and lignin were further removed after further alkali treatment.
The yield of the bamboo cellulose is 45.5%.
The contents of cellulose, hemicellulose and lignin in the obtained bamboo fiber are shown in table 1.
Example 3
(1) Pulverizing tender Phyllostachys Pubescens, oven drying, mixing with 5wt% hydrochloric acid aqueous solution at solid-liquid mass ratio of 1:10, and stirring at low speed at room temperature for 7 hr;
(2) Washing the sample obtained in the step (1) to be neutral, uniformly mixing the sample with a sodium hydroxide aqueous solution with the mass fraction of 5wt% in a solid-liquid ratio of 1:10, heating to 60 ℃, preserving heat and stirring for 7 hours; washing with deionized water to neutrality after completion;
(3) Mixing the product obtained in the step (2) with a sodium hydroxide aqueous solution with the mass fraction of 5wt% at a solid-liquid mass ratio of 1:10, heating to 60 ℃, preserving heat and stirring for 7 hours, and finally washing with deionized water to be neutral;
(4) Mixing the product obtained in the step (3) with 5wt% sodium hydroxide aqueous solution according to a solid-liquid mass ratio of 1:10, heating to 60 ℃, preserving heat and stirring for 7 hours.
Finally, deionized water is used for washing to be neutral, and the bamboo fiber is obtained after drying.
The obtained bamboo fiber sample is shown in FIG. 4, and its infrared spectrum is shown in FIG. 1, which shows that the sample is about 1730cm -1 There is a distinct peak due to C=O stretching vibration with hemicellulose and lignin, 1730cm after 3 alkali treatments -1 The peak intensity was significantly reduced, indicating that hemicellulose and lignin were further removed after further alkali treatment.
The yield of the bamboo fiber is 39.8%.
The contents of cellulose, hemicellulose and lignin in the obtained bamboo fiber are shown in table 1.
Example 4
(1) Pulverizing tender Phyllostachys Pubescens, oven drying, mixing with 5wt% hydrochloric acid aqueous solution at solid-liquid mass ratio of 1:10, and stirring at low speed at room temperature for 7 hr;
(2) Washing the sample obtained in the step (1) to be neutral, uniformly mixing the sample with a sodium hydroxide aqueous solution with the mass fraction of 4wt% in a solid-liquid ratio of 1:10, heating to 90 ℃, preserving heat and stirring for 6 hours; washing with deionized water to neutrality after completion;
(3) Mixing the product obtained in the step (2) with a sodium hydroxide aqueous solution with the mass fraction of 6wt% at a solid-liquid mass ratio of 1:10, heating to 70 ℃, preserving heat and stirring for 7 hours, and finally washing with deionized water to be neutral;
(4) Mixing the product obtained in the step (3) with a sodium hydroxide aqueous solution with the mass fraction of 4wt% at a solid-liquid mass ratio of 1:10, heating to 60 ℃, preserving heat and stirring for 6 hours.
Finally, deionized water is used for washing to be neutral, and the bamboo fiber is obtained after drying.
The yield of the bamboo fiber is 39.5%.
Example 5
(1) Pulverizing tender Phyllostachys Pubescens, oven drying, mixing with 5wt% hydrochloric acid aqueous solution at solid-liquid mass ratio of 1:10, and stirring at low speed at room temperature for 7 hr;
(2) Washing the sample obtained in the step (1) to be neutral, uniformly mixing the sample with a sodium hydroxide aqueous solution with the mass fraction of 7wt% in a solid-liquid ratio of 1:10, heating to 90 ℃, preserving heat and stirring for 6 hours; washing with deionized water to neutrality after completion;
(3) Mixing the product obtained in the step (2) with a sodium hydroxide aqueous solution with the mass fraction of 7wt% at a solid-liquid mass ratio of 1:10, heating to 70 ℃, preserving heat and stirring for 7 hours, and finally washing with deionized water to be neutral;
(4) Mixing the product obtained in the step (3) with a 7wt% sodium hydroxide aqueous solution according to a solid-liquid mass ratio of 1:10, heating to 60 ℃, preserving heat and stirring for 6 hours.
Finally, deionized water is used for washing to be neutral, and the bamboo fiber is obtained after drying.
The yield of the bamboo fiber is 39.2%.
Example 6
The method according to example 1 is different in that the source of tender phyllostachys pubescens is the autonomous felling phyllostachys pubescens; the bamboo age was 120-130 days, and the rest was the same as in example 1.
The yield of the bamboo fiber is 43.2%.
The contents of alpha-cellulose, hemicellulose and lignin in the obtained bamboo fiber are shown in table 1.
Comparative example 1
The procedure of example 1 was followed except that the bamboo age was 9 months, and the other conditions were the same as in example 1.
The yield of the bamboo cellulose is 39.4%.
The contents of alpha-cellulose, hemicellulose and lignin in the obtained bamboo fiber are shown in table 1.
TABLE 1
As can be seen from Table 1, the bamboo with a bamboo age of 180 days or less is used, and the preparation method of the application has high yield of bamboo cellulose and high alpha-cellulose content.
In particular, by the preferred embodiment of the present application, as in example 4, a high content of α -cellulose in the bamboo cellulose can be obtained while maintaining a high yield of bamboo cellulose.
The preferred embodiments of the present application have been described in detail above, but the present application is not limited thereto. Within the scope of the technical idea of the application, a number of simple variants of the technical solution of the application are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the application, all falling within the scope of protection of the application.
Claims (10)
1. A preparation method of high-yield bamboo cellulose is characterized by comprising the following steps:
(1) Carrying out first contact on the bamboo material and the acid liquor to obtain a bamboo material product;
(2) Carrying out at least one second contact on the bamboo product obtained in the step (1) and alkali liquor, washing and drying to obtain bamboo cellulose;
the bamboo is moso bamboo with the bamboo age of 15-180 days;
the second contact conditions include: the temperature is 60-80 ℃ and the time is 4-8h.
2. The preparation method according to claim 1, wherein,
the conditions of the first contact include: the temperature is 15-40 ℃ and the time is 4-8h.
3. The preparation method according to claim 1 or 2, wherein,
after the first contact and the second contact, the bamboo materials are washed to be neutral respectively; and/or
The bamboo is moso bamboo with bamboo age of 10-90 days.
4. The preparation method according to claim 1 or 2, wherein,
the mass concentration of the acid liquor is 4-8wt%; in the acid liquid, the acid is at least one selected from hydrochloric acid and sulfuric acid.
5. The preparation method according to claim 1 or 2, wherein,
the mass concentration of the alkali liquor is 4-8wt%; in the alkaline solution, the base is selected from alkali metal hydroxide and/or alkaline earth metal hydroxide.
6. The process according to claim 5, wherein the base is sodium hydroxide and/or potassium hydroxide.
7. The preparation method according to claim 1 or 2, wherein,
the mass ratio of the bamboo wood to the acid liquor is 1:8-20 parts;
the mass ratio of the bamboo wood to the alkali liquor is 1:5-15.
8. The preparation method according to claim 1 or 2, wherein,
and (3) carrying out secondary contact on the bamboo product obtained in the step (1) and alkali liquor for 1-4 times.
9. The preparation method according to claim 8, wherein,
carrying out 3 times of second contact on the bamboo product obtained in the step (1) and alkali liquor; preferably, the method comprises the steps of,
the second contact is carried out for the 1 st time, and the mass concentration of the alkali liquor is 6-8wt%;
the second contact is carried out for the 2 nd time, and the mass concentration of the alkali liquor is 5-6wt%;
and (3) carrying out second contact, wherein the mass concentration of the alkali liquor is 4-5wt%.
10. The preparation method according to claim 8, wherein,
the temperature of the 1 st second contact is 80-90 ℃ and the time is 6-8h;
the temperature of the second contact for the 2 nd time is 60-80 ℃ and the time is 6-8h;
the temperature of the 3 rd second contact is 60-80 ℃ and the time is 4-8h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310713755.5A CN116607344A (en) | 2023-06-15 | 2023-06-15 | High-yield bamboo cellulose preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310713755.5A CN116607344A (en) | 2023-06-15 | 2023-06-15 | High-yield bamboo cellulose preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116607344A true CN116607344A (en) | 2023-08-18 |
Family
ID=87674686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310713755.5A Pending CN116607344A (en) | 2023-06-15 | 2023-06-15 | High-yield bamboo cellulose preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116607344A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390989A (en) * | 2002-07-19 | 2003-01-15 | 徐奎元 | Process for preparing natural bamboo fibres |
| CN103484948A (en) * | 2013-09-11 | 2014-01-01 | 昆山市万丰制衣有限责任公司 | Technology for extracting bamboo fibers by using caustic soda |
| JP2017043869A (en) * | 2015-08-28 | 2017-03-02 | 日本製紙株式会社 | Additive for paper making |
| CN111021123A (en) * | 2019-12-11 | 2020-04-17 | 北京理工大学 | Method for extracting bamboo cellulose by utilizing moso bamboos |
| CN112661975A (en) * | 2020-12-07 | 2021-04-16 | 浙江金加浩绿色纳米材料股份有限公司 | Method for extracting xylose, lignin and cellulose nanocrystals by using bamboo crushed materials |
| CN113201961A (en) * | 2021-05-20 | 2021-08-03 | 四川工商职业技术学院 | Preparation method of bamboo dissolving pulp |
-
2023
- 2023-06-15 CN CN202310713755.5A patent/CN116607344A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390989A (en) * | 2002-07-19 | 2003-01-15 | 徐奎元 | Process for preparing natural bamboo fibres |
| CN103484948A (en) * | 2013-09-11 | 2014-01-01 | 昆山市万丰制衣有限责任公司 | Technology for extracting bamboo fibers by using caustic soda |
| JP2017043869A (en) * | 2015-08-28 | 2017-03-02 | 日本製紙株式会社 | Additive for paper making |
| CN111021123A (en) * | 2019-12-11 | 2020-04-17 | 北京理工大学 | Method for extracting bamboo cellulose by utilizing moso bamboos |
| CN112661975A (en) * | 2020-12-07 | 2021-04-16 | 浙江金加浩绿色纳米材料股份有限公司 | Method for extracting xylose, lignin and cellulose nanocrystals by using bamboo crushed materials |
| CN113201961A (en) * | 2021-05-20 | 2021-08-03 | 四川工商职业技术学院 | Preparation method of bamboo dissolving pulp |
Non-Patent Citations (1)
| Title |
|---|
| 卢神州等编著: "《纺织化学》", 31 August 2021, 上海：东华大学出版社, pages: 108 - 109 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101613970B (en) | Method for preparing bagasse dissolving pulp and pre-extracting hemicellulose and product thereof | |
| CN104153229B (en) | A kind of preparation method of bamboo dissolving pulp | |
| CN101148782B (en) | Hemp-like bast fibre flash explosion-high temperature boiling combination degumming technique | |
| CN101158122B (en) | Bamboo dissolved pulp manufacturing technique | |
| CN101514529A (en) | Method for preparing bamboo dissolving pulp by improved prehydrolysis alkaline process and product thereof | |
| CN103643577B (en) | A kind of method utilizing garlic skin to prepare nano-cellulose whisker | |
| CN101565906A (en) | Method for producing bamboo dissolving pulp by pre-extracting hemicellulose and product thereof | |
| CN101565907B (en) | Bagasse alkaline pulping method by pre-extracting hemicellulose and product thereof | |
| CN101736632B (en) | Digestion process for preparing wood dissolving pulp by natural-color unbleached wood pulp in a modifying way | |
| CN102978993A (en) | Bamboo fiber dissolving pulp and production technology thereof | |
| CN1974921B (en) | Method for producing bamboo pomace | |
| CN102747637B (en) | Process for producing cellulose by residues of pomace after pectin extraction | |
| CN109653012B (en) | Method for preparing dissolving pulp by using straws or energy plants | |
| CN101187068B (en) | Japanese banana fiber and its preparation method and uses | |
| CN103669064B (en) | A kind of preparation technology of vinegar-grade bamboo pulp | |
| CN111472186B (en) | Method for preparing high-quality crop straw dissolving pulp through hydrothermal pretreatment | |
| CN110100057A (en) | The method for manufacturing dissolving pulp | |
| CN108797176B (en) | Method for preparing dissolving pulp from all cotton stalks | |
| CN102677504B (en) | Manufacturing process of antibacterial bamboo pulp used for high-wet-modulus fibre | |
| CN101514530A (en) | Method for preparing bagasse dissolving pulp by improved prehydrolysis alkaline process and product thereof | |
| CN101158121B (en) | Process for manufacturing dissolved pulp by using ethanol, sulfate and acetic acid | |
| CN105780583B (en) | Non-timber class paper pulp | |
| CN102040709A (en) | Method for preparing bleaching bamboo pulp cellulose water absorbing material | |
| CN116607344A (en) | High-yield bamboo cellulose preparation method | |
| CN103422388A (en) | Manufacturing method of hemp paper |
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 |