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Method for preparing frozen gel with composite structure as well as products and application thereof

A cryogel and composite structure technology, which is applied in the field of preparing composite structure cryogel, can solve problems such as complicated steps, and achieve the effects of excellent structure, controllable structure and easy molding.

Active Publication Date: 2016-04-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The Chinese invention patent publication number is CN103102441A, which discloses a preparation method of nanocomposite hydrogel with rapid temperature response and high mechanical properties. The obtained gel needs to be frozen in liquid nitrogen for 10-40 seconds, and then the reaction liquid is placed in- The polymerization reaction is carried out at 8~-28°C. This method requires the reaction system to be frozen in liquid nitrogen first, and then the two-step method of freezing and polymerization is relatively complicated.

Method used

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  • Method for preparing frozen gel with composite structure as well as products and application thereof
  • Method for preparing frozen gel with composite structure as well as products and application thereof
  • Method for preparing frozen gel with composite structure as well as products and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] According to the mass ratio of 1:6:27, mix 1g sodium alginate, 6g acrylamide, and 27ml deionized water evenly, seal (to prevent the evaporation of water) and stir on the mixer for 24 hours to obtain a uniformly mixed viscous liquid . Then put the viscous liquid in a centrifuge to remove the air bubbles mixed in by stirring, and the obtained solution is called mother liquor.

[0038] The mass fractions were respectively 1.09% ammonium persulfate aqueous solution, 0.109% N,N'-methylenebisacrylamide aqueous solution and 6.06% calcium sulfate turbid solution.

[0039] as attached figure 2 As shown, put 10g of mother liquor into syringe A, and drop 20μl of tetramethylethylenediamine; put 1g of ammonium persulfate solution and 1g of N,N'-methylenebispropylene into syringe B in sequence Amide solution and 1g of calcium sulfate suspension, and then stir separately. Squeeze the air out of both syringes and connect the two syringes with rubber tubing. Then push the syringe b...

Embodiment 2

[0041] According to the mass ratio of 1:5:20, mix 1g sodium alginate, 5g acrylamide, and 20ml deionized water evenly, seal (to prevent the evaporation of water) and stir on the mixer for 24 hours to obtain a uniformly mixed viscous liquid . Then put the viscous liquid in a centrifuge to remove the air bubbles mixed in by stirring, and the obtained solution is called mother liquor.

[0042] The mass fractions of the preparations were 1% ammonium persulfate aqueous solution, 0.1% N,N'-methylenebisacrylamide aqueous solution and 3% calcium sulfate turbid solution.

[0043] as attached figure 2 As shown, put 10g of mother liquor into syringe A, and drop 20μl of tetramethylethylenediamine; put 1g of ammonium persulfate solution and 1g of N,N'-methylenebispropylene into syringe B in sequence Amide solution and 1g of calcium sulfate suspension, and then stir separately. Squeeze the air out of both syringes and connect the two syringes with rubber tubing. Then push the syringe ba...

Embodiment 3

[0045] According to the mass ratio of 1:20:100, mix 0.2g sodium alginate, 4g acrylamide, and 20ml deionized water evenly, seal (to prevent the evaporation of water) and stir on the mixer for 24 hours to obtain a uniformly mixed viscous liquid. Then put the viscous liquid in a centrifuge to remove the air bubbles mixed in by stirring, and the obtained solution is called mother liquor.

[0046] The mass fractions were respectively 10% ammonium persulfate aqueous solution, 1% N,N'-methylenebisacrylamide aqueous solution and 15% calcium sulfate turbid solution.

[0047] as attached figure 2 As shown, put 10g of mother liquor into syringe A, and drop 20μl of tetramethylethylenediamine; put 0.5g of ammonium persulfate solution, 0.5g of N,N'-methylene Bisacrylamide solution and 0.5g calcium sulfate suspension were then stirred evenly. Squeeze the air out of both syringes and connect the two syringes with rubber tubing. Then push the syringe back and forth until the solution is w...

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Abstract

The invention relates to a method for preparing frozen gel with a composite structure. The method comprises the following steps: sodium alginate, acrylamide and deionized water are mixed, tetramethyl ethylenediamine is added, and a solution A is prepared; an aqueous solution of ammonium persulfate, an aqueous solution of N,N'-methylenebisacrylamide and emulsion of calcium sulfate are mixed, and a solution B is prepared; the solution A and the solution B are mixed, and gel is prepared; gel is moulded and shaped, gel with a hollow structure is prepared, the gel is quickly frozen and shaped, in order to obtain the frozen gel with the composite structure, or gel is quickly frozen and shaped, the gel is hollowed for preparing a hollow structure, in order to obtained the frozen gel with the composite structure. The invention also relates to the frozen gel with the composite structure, the frozen gel with the composite structure which is prepared by interface fusion for various demands, and an application to swelling of xerogel. The technical scheme has the advantages of simple preparation technology, controllable structure, easy shaping, and low cost.

Description

technical field [0001] The invention relates to the field of gel preparation and application, in particular to a method for preparing composite structure frozen gel and its product and application. Background technique [0002] Gel materials are formed by filling a large number of various solvents (such as water, organic solvents, gases, etc.) with a three-dimensional polymer network. In our life, gel materials have been widely used, such as food, contact lenses, super absorbent diapers, etc. Gel composites with high performance have been an active area of ​​research for many years. Among all kinds of gel systems, the hydrogel system has great development potential in production and application due to its good mechanical properties, simple preparation process and low production cost. For example, the literature "Highstretchableandtoughhydrogels" (Nature2012) reported a hybrid network hydrogel composed of alginic acid and polyacrylamide. The two polymer networks of this hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/26C08J3/075C08L51/02C08F251/00C08F220/56C08F222/38
CPCC08F251/00C08J3/075C08J9/26C08J2351/02C08F220/56
Inventor 李铁风曲绍兴饶平杨栩旭李驰谢雨涵李国瑞梁艺铭黄晓强
Owner ZHEJIANG UNIV