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Composite natural polymer gel material

A technology of natural polymer and composite hydrogel, applied in the field of natural polymer materials, can solve the problems of difficult dispersion, difficult treatment and purification of wastewater, and small molecules.

Active Publication Date: 2016-08-10
浙江绍兴万德福生物技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its cross-linking agent has its disadvantages and deficiencies
Taking epichlorohydrin as an example, its introduction will inevitably make the hydrogel contain chloride ions, which may affect the strength of the hydrogel, and will also bring chloride ions into the wastewater generated after cleaning the hydrogel. It is difficult to treat and purify wastewater; and the solubility of epichlorohydrin in water is poor, and it is difficult to fully disperse in cellulose aqueous solution; epichlorohydrin has certain volatility, irritation and carcinogenicity; as a crosslinking agent The epichlorohydrin has a small molecule and a single structure, and will not endow the cellulose gel with new properties

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0049] Example 1: Preparation of inclusion compound of cyclodextrin and reactive polymer (method 1)

[0050] At room temperature, the aqueous solution of polyethylene glycol diglycidyl ether and polyethylene glycol monomethyl ether glycidyl ether was added dropwise to the saturated solution of α-cyclodextrin, and after precipitation and filtration, it was dried at room temperature to obtain α-cyclodextrin - Inclusion complexes of cyclodextrins with polyethylene glycol diglycidyl ether / polyethylene glycol monomethyl ether glycidyl ether.

Embodiment 2

[0051] Example 2: Preparation of inclusion compound of cyclodextrin and reactive polymer (method 2)

[0052] At room temperature, add the aqueous solution of polyethylene glycol diglycidyl ether dropwise to the saturated solution of α-cyclodextrin, after precipitation and filtration, dry at room temperature to obtain α-cyclodextrin and polyethylene glycol diglycidyl ether Inclusion compound of glycerol ether.

Embodiment 3

[0053] Example 3: Preparation of composite natural polymer hydrogel (method 1)

[0054] (1) Weigh 1g of sodium hydroxide, 2g of urea, 10g of water, 2g of cellulose, and 0.5g of starch and mix them evenly. After 6 minutes of ultrasonication, stir until completely dissolved to obtain a composite natural polymer solution; (2) then The composite natural polymer solution was packaged into the mold, and the temperature was -30 o C freezing, the freezing time is 24 hours, and then the composite natural polymer solution after freezing is cooled at 20 o Melt at a temperature of C, and stir at a stirring speed of 100r / min for 24 hours; (3) Repeat step (2) 4 times to obtain the natural polymer aqueous solution after circulation treatment; (4) Congeal to the composite natural polymer Add 0.003 g α-cyclodextrin and polyethylene glycol diglycidyl ether / polyethylene glycol monomethyl ether glycidyl ether inclusion complex (prepared by the method of Example 1), 0.002 g α-cyclodextrin and pol...

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Abstract

The invention discloses a composite natural polymer gel material with a cross-linking agent. The material comprises hydrogel, organogel, aerogel and bioplastics and mainly overcomes the problem of low mechanical strength of conventional natural polymer gel materials. According to the invention, a certain amount of the cross-linking agent is added into a natural polymer water-based solution or dispersion liquid, then stirring is carried out, the obtained mixture is placed in a non-solvent for physical cross-linking, and then washing is carried out so as to obtain composite natural polymer hydrogel; water in the composite natural polymer hydrogel is replaced with an organic solution so as to prepare composite natural polymer organogel; the composite natural polymer hydrogel or organogel is dried so as to prepare composite natural polymer aerogel; the composite natural polymer aerogel is subjected to hydrophobic treatment so as to obtain hydrophobic aerogel; the composite natural polymer aerogel is subjected to heat treatment so as to obtain carbon aerogel; and one or more selected from the above-mentioned gel materials are subjected to high-temperature pressing so as to prepare composite natural polymer bioplastics. The composite natural polymer gel material prepared in the invention has the advantages of excellent mechanical properties, a high specific surface area, high elongation at break, etc., and can be easily processed into molded products of a plurality of forms.

Description

technical field [0001] The invention belongs to the technical field of natural polymer materials, and specifically relates to a composite natural polymer gel material (hydrogel, organic gel, aerogel, bioplastic) containing a supramolecular crosslinking agent and a preparation method thereof. Background technique [0002] Hydrogel is a polymer compound with a three-dimensional network structure, which can absorb and slowly release a large amount of water without changing its own structure and shape. Due to its excellent water retention performance and adjustable mechanical properties, it is widely used in many fields. The unique three-dimensional network structure of hydrogel can contain a large number of free water molecules. Other high value-added materials such as organogels and aerogels can be prepared by replacing and removing the water content of hydrogels. [0003] Natural polymer hydrogel (take cellulose as an example) is a relatively mature type of gel, and it is al...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08L3/02C08L5/16C08L71/02C08K5/21C08J3/24C08J3/075B01J13/00C01B31/02
CPCB01J13/0091C08J3/075C08J3/24C08J2301/02C08J2403/02C08L1/02C08L2205/035C08L3/02C08L5/16C08L71/02C08K5/21
Inventor 苏鑫
Owner 浙江绍兴万德福生物技术有限公司
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