CN107033371A - A kind of preparation method of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels - Google Patents
A kind of preparation method of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 229920001046 Nanocellulose Polymers 0.000 title claims abstract description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 11
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 11
- 238000004132 cross linking Methods 0.000 claims abstract description 41
- 239000011259 mixed solution Substances 0.000 claims abstract description 26
- 239000000243 solution Substances 0.000 claims abstract description 4
- 238000010257 thawing Methods 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- -1 acryloyl Amine Chemical class 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 3
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims 1
- 239000000017 hydrogel Substances 0.000 abstract description 16
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 5
- 239000001257 hydrogen Chemical group 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 239000011203 carbon fibre reinforced carbon Substances 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 3
- 238000010413 gardening Methods 0.000 abstract description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- FIKFOOMAUXPBJM-UHFFFAOYSA-N hepta-2,5-dienediamide Chemical class NC(=O)C=CCC=CC(N)=O FIKFOOMAUXPBJM-UHFFFAOYSA-N 0.000 abstract 1
- 229920005615 natural polymer Polymers 0.000 abstract 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 70
- 229920002451 polyvinyl alcohol Polymers 0.000 description 69
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 239000003643 water by type Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F261/00—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00
- C08F261/02—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00 on to polymers of unsaturated alcohols
- C08F261/04—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00 on to polymers of unsaturated alcohols on to polymers of vinyl alcohol
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- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
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- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
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- 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
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- 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
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/02—Cellulose; Modified cellulose
- C08J2401/04—Oxycellulose; Hydrocellulose
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Abstract
A kind of preparation method of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels, belongs to polymeric material field and photosensitive material field.The present invention includes：Natural polymer CNC is added in PVA solution, PVA/CNC mixed solutions are obtained.Again by the N containing carbon-carbon double bond and amino, N ' methylene-bisacrylamides (MBA) are added in mixed solution, MBA and PVA, hydrogen bond action occurs for CNC, it polymerize simultaneously under ultraviolet light, handled finally by circulating frozen defrosting, obtain photo-crosslinking PVA/CNC composite aquogels.This photo-crosslinking PVA/CNC composite aquogels improve the mechanical property of PVA hydrogels so that it has more preferable utilization in multiple fields such as agricultural gardening, biological medicine, environmental protection.
Description
Technical field
The present invention relates to a kind of preparation method of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels,
The light curing compound material that photocrosslinking agent obtains activeness and quietness is particularly added, belongs to field of polymer composite material.
Background technology
Hydrogel is widely used in agricultural gardening, biological medicine, environment as a kind of high water-keeping material of high water absorption, hydrogel
The multiple fields such as protection.But traditional hydrogel often has intensity difference, the low shortcoming of toughness prepares high-intensity high-tenacity
Hydrogel be always research focus.
Water-soluble poval (PVA) is obtained by polyvinyl acetate hydrolysis, and structural formula is-CH2CH(OH)n- it is a kind of band
The high molecular polymer of hydroxyl.Polyvinyl alcohol (PVA), due to its good biocompatibility and high-hydrophilic, is to prepare hydrogel
Traditional raw material.However, because PVA has substantial amounts of soft segment, so pure PVA hydrogels often have relatively low mechanical property
Energy.PVA hydrogels to be made have good mechanical property, it is necessary to be modified processing to it.
Nanocrystalline cellulose (Cellulose Nanocrystals, CNC), or it is called cellulose crystallite, its diameter
For a few to tens of nanometers, tens to hundreds of nanometers of length.The CNC extracted from renewable resource, it has excellent machine
Tool performance (high intensity and modulus), big specific surface area, the advantages of environment-friendly and inexpensive.Mechanical performance excellent CNC
And hydrogen bond is formed with the hydroxyl on PVA, the mechanical property of PVA hydrogels can be improved.
Photo-crosslinking technology is used as radiation source as a kind of new crosslinking technological, the ultraviolet light of photo-crosslinking technology using low energy.
It is environmentally friendly quick with simple to operate, low cost and other advantages.N, N ' it is double containing carbon carbon in-methylene-bisacrylamide (MBA) molecule
Key and amino, can occur hydrogen bond action with the material rich in hydroxyl.In the presence of light trigger and ultraviolet light, N, N '-sub-
Bisacrylamide can polymerize, and can be applied to as photocrosslinking agent in all kinds of composites.
The content of the invention
The purpose of the present invention is the addition natural macromolecular CNC in PVA, reduces the cost of PVA based composites, enhancing
The mechanical property of PVA based composites.Added in addition in PVA/CNC composites in MBA, MBA molecules and contain carbon-carbon double bond
And amino, can occur hydrogen bond action with the hydroxyl on PVA, while can polymerize under ultraviolet light, further carry
The mechanical property of high PVA/CNC composites.
The purpose of the present invention is to be achieved through the following technical solutions：A kind of photo crosslinked polyethylene alcohol/nanocrystalline cellulose
The preparation method of PVA/CNC composite aquogels, includes following step：
(1) preparation of PVA/CNC mixed solutions：CNC is taken to be dissolved in the suspension that system in deionized water is made into mass fraction 1%,
In 100W supersonic wave cleaning machines, ultrasonic disperse 30min.It is again 1 by PVA and CNC mass ratio:0.05~1:0, CNC is suspended
Liquid is added in PVA solution, 90 DEG C of stirring 2h of constant temperature, obtains PVA/CNC mixed solutions.
(2) preparation of photo-crosslinking PVA/CNC mixed solutions：Above-mentioned steps (1) PVA/CNC mixed solutions are cooled to 60 DEG C, plus
Enter photocrosslinking agent and light trigger, shading stirring 1h is poured into culture dish after standing froth breaking, when exposing one section under ultraviolet light
Between, obtain photo-crosslinking PVA/CNC mixed solutions.
(3) preparation of photo-crosslinking PVA/CNC composite aquogels：By the sealing of above-mentioned steps (2) photo-crosslinking PVA/CNC mixed solutions,
It is put into refrigerator, freezes 20h at -20 DEG C, place into the 4h that thaws at room temperature.Circulating frozen thaws 5~7 times.Obtain photo-crosslinking
PVA/CNC composite aquogels.
PVA and CNC mass ratioes described in step (1) are 1:0.05~1:0.
Photocrosslinking agent described in step (2) is selected from N, N '-methylene-bisacrylamide, acrylic acid, acrylamide, itaconic acid, third
Olefin(e) acid hydroxyl ethyl ester, its consumption is the 1%~10% of PVA mass.
Light trigger described in step (2) is water-soluble light trigger.Consumption is the 1%~10% of PVA mass.
Cryogenic temperature described in step (3) is -20 DEG C.
Circulating frozen defrosting number of times described in step (3) is 5~7 times.
Compared with prior art, the invention has the advantages that and beneficial effect：PVA strands contain great amount of hydroxy group (-
OH), good water solubility is made it have, can be with the natural macromolecular containing hydroxyl by hydrogen bond crosslinks, close connection.Again plus
Enter water white transparency, the MBA of hypotoxicity obtains the photo-crosslinking PVA/CNC composite aquogels of dual network structure as photocrosslinking agent,
Photo-crosslinking PVA/CNC composite aquogels possess more outstanding mechanical property so that it is in agricultural gardening, biological medicine, environment
The multiple fields such as protection have more preferable utilization.
Brief description of the drawings：
Fig. 1 is photo-crosslinking PVA/CNC composite aquogels and non-photo-crosslinking PVA/CNC Compound Waters prepared in embodiment 1
Gel, the tensile stress strain diagram of pure PVA hydrogels.
Fig. 2 is photo-crosslinking PVA/CNC composite aquogels and non-photo-crosslinking PVA/CNC Compound Waters prepared in embodiment 1
Gel, compressive strength figure of the pure PVA hydrogels under 98% compressive deformation.
Embodiment
In order to preferably explain the present invention, the present invention is further explained in detail with reference to specific embodiment, but this hair
Bright embodiment not limited to this.
Embodiment 1
(1) preparation of PVA/CNC mixed solutions：CNC is taken to be dissolved in the suspension that system in deionized water is made into mass fraction 1%,
In 100W supersonic wave cleaning machines, ultrasonic disperse 30min.3g PVA and 34.5mL deionized waters are taken in three-necked flask, at 90 DEG C
Lower stirring 2h, after being completely dissolved, adds 0.02gCNC, continues to stir, obtains PVA/CNC mixed solutions.
(2) preparation of photo-crosslinking PVA/CNC mixed solutions：Above-mentioned steps (1) PVA/CNC mixed solutions are cooled to 60 DEG C, drop
Temperature adds 0.15g photocrosslinking agents MBA (N, N '-methylene-bisacrylamide), after being stirred until homogeneous, adds 0.09g light to 60 DEG C
1h is stirred in initiator 2959 (2- hydroxyls -4- (2- hydroxy ethoxies) -2- methylbenzenes) shading, is poured into after standing froth breaking in culture dish,
Under F300 uviol lamp (Fusion UV systems.USA), transmitted 6 times with 2cm/min, obtain photo-crosslinking PVA/
CNC mixed solutions.
(3) preparation of photo-crosslinking PVA/CNC composite aquogels：By the sealing of above-mentioned steps (2) photo-crosslinking PVA/CNC mixed solutions,
It is put into refrigerator, freezes 20h at -20 DEG C, place into the 4h that thaws at room temperature.Circulating frozen thaws 5 times.Obtain photo-crosslinking PVA/
CNC composite aquogels.
Embodiment 2
(1) preparation of PVA/CNC mixed solutions：CNC is taken to be dissolved in the suspension that system in deionized water is made into mass fraction 1%,
In 100W supersonic wave cleaning machines, ultrasonic disperse 30min.3g PVA and 34.5mL deionized waters are taken in three-necked flask, at 90 DEG C
Lower stirring 2h, after being completely dissolved, adds 0.03gCNC, continues to stir, obtains PVA/CNC mixed solutions.
(2) preparation of photo-crosslinking PVA/CNC mixed solutions：Above-mentioned steps (1) PVA/CNC mixed solutions are cooled to 60 DEG C, drop
Temperature adds 0.30g photocrosslinking agents MBA (N, N '-methylene-bisacrylamide), after being stirred until homogeneous, adds 0.15g light to 60 DEG C
1h is stirred in initiator 2959 (2- hydroxyls -4- (2- hydroxy ethoxies) -2- methylbenzenes) shading, is poured into after standing froth breaking in culture dish,
300s is irradiated under the ultraviolet spot lights of UV-1000IWATA, photo-crosslinking PVA/CNC mixed solutions are obtained.
(3) preparation of photo-crosslinking PVA/CNC composite aquogels：By the sealing of above-mentioned steps (2) photo-crosslinking PVA/CNC mixed solutions,
It is put into refrigerator, freezes 20h at -20 DEG C, place into the 4h that thaws at room temperature.Circulating frozen thaws 7 times.Obtain photo-crosslinking PVA/
CNC composite aquogels.
By photo-crosslinking PVA/CNC composite aquogels and non-photo-crosslinking PVA/CNC compound water congealings prepared in embodiment 1
Glue, pure PVA hydrogels cut out sample into specification be long l=15 ± 2mm, wide b=4.0 ± 0.2mm, thick h=2.0 ± 1mm dumbbell shape
Batten sample preparation dumbbell shapes batten is tested with KDIII-5 types microcomputer controlled electronic universal tester, obtains stretching as shown in Figure 1
Stress strain diagram.The PVA/CNC water-settings of non-photo-crosslinking it will be seen from figure 1 that the PVA/CNC composite aquogels of photo-crosslinking compare
Glue, pure PVA hydrogels have higher tensile strength and elongation at break, and this is probably because the PVA/CNC of photo-crosslinking is combined
Hydrogel has more stable network structure so that it possesses higher tensile strength and elongation at break.
By photo-crosslinking PVA/CNC composite aquogels and non-photo-crosslinking PVA/CNC composite aquogels prepared in embodiment 1
According to 7~10mm of diameter, high 7~10mm specification is tailored into cylindrical sample.With the omnipotent examination of KDIII-5 types microcomputer controlled electronic
The machine of testing is compressed experiment.Figure it is seen that PVA/CNC water of the PVA/CNC composite aquogels of photo-crosslinking than non-photo-crosslinking
Gel and pure PVA hydrogels have higher compressive strength in 98% compression strain, and this is probably the PVA/ due to photo-crosslinking
CNC composite aquogels have more stable network structure, and certain supporting role is played to hydrogel, possesses it higher
Compressive strength.
Claims (6)
1. a kind of preparation method of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels：
(1) preparation of PVA/CNC mixed solutions：CNC is taken to be dissolved in the suspension for being configured to mass fraction 1% in deionized water,
In 100W supersonic wave cleaning machines, ultrasonic disperse 30min.It is again 1 by PVA and CNC mass ratio:0.05~1:0, CNC is suspended
Liquid is added in PVA solution, 90 DEG C of stirring 2h of constant temperature, obtains PVA/CNC mixed solutions；
(2) preparation of photo-crosslinking PVA/CNC mixed solutions：Above-mentioned steps (1) PVA/CNC mixed solutions are cooled to 60 DEG C, plus
Enter photocrosslinking agent and light trigger, shading stirring 1h is poured into culture dish after standing froth breaking, when exposing one section under ultraviolet light
Between, obtain photo-crosslinking PVA/CNC mixed solutions；
(3) preparation of photo-crosslinking PVA/CNC composite aquogels：By the sealing of above-mentioned steps (2) photo-crosslinking PVA/CNC mixed solutions,
It is put into refrigerator, 20h is freezed at -20 DEG C, place into the 4h that thaws at room temperature, circulating frozen thaws 5~7 times.Obtain photo-crosslinking
PVA/CNC composite aquogels.
2. the preparation of a kind of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels according to claim 1
Method, it is characterised in that PVA and CNC mass ratioes described in step (1) are 1:0.05~1:0.
3. the preparation of a kind of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels according to claim 1
Method, it is characterised in that photocrosslinking agent described in step (2) is selected from N, N '-methylene-bisacrylamide, acrylic acid, acryloyl
Amine, itaconic acid, hydroxy-ethyl acrylate, its consumption is the 1%~10% of PVA mass.
4. the preparation of a kind of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels according to claim 1
Method, it is characterised in that light trigger described in step (2) is water-soluble light trigger.Consumption for PVA mass 1%~
10%.
5. a kind of system of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels according to claim 1
Preparation Method, it is characterised in that cryogenic temperature described in step (3) is -20 DEG C.
6. a kind of a kind of photo crosslinked polyethylene alcohol/nanocrystalline cellulose PVA/CNC composite aquogels according to claim 1
Preparation method, it is characterised in that circulating frozen defrosting number of times described in step (3) is 5~7 times.
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| CN108888803A (en) * | 2018-07-11 | 2018-11-27 | 蒋青 | A kind of biological support and preparation method thereof, purposes and aquogel system |
| CN109206666A (en) * | 2018-04-27 | 2019-01-15 | 张金荣 | A kind of nanocrystal cellulose aquagel and preparation method thereof |
| CN109266252A (en) * | 2018-09-14 | 2019-01-25 | 江南大学 | A kind of photo-crosslinking PVA-SbQ/CNC/DA compound water congealing glue adhesive agent and preparation method thereof |
| CN109627658A (en) * | 2017-10-05 | 2019-04-16 | 默克专利股份有限公司 | Composition comprising the pure and mild Nano capsule containing liquid crystal media of functional polyethylene |
| CN109749097A (en) * | 2019-01-17 | 2019-05-14 | 中南林业科技大学 | The preparation method of environmentally friendly quick selfreparing hydrogel |
| CN112387222A (en) * | 2020-10-28 | 2021-02-23 | 中国工程物理研究院激光聚变研究中心 | Preparation method of Co-Ni bimetallic aerogel |
| CN113321770A (en) * | 2021-06-22 | 2021-08-31 | 江南大学 | Preparation method of temperature-sensitive hydrogel |
| CN113376914A (en) * | 2021-05-31 | 2021-09-10 | 西南医科大学 | Stretchable microcapsule film for reflective display and preparation method thereof |
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