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Method for preparing interpenetrating network intelligent hydrogel by adopting frontal polymerization

A technology of interpenetrating network and hydrogel, which is applied in the field of preparation of functional polymer materials, can solve the problems of long polymerization time and high energy consumption, and achieve the effect of high temperature, low energy consumption and inhibition of phase separation

Inactive Publication Date: 2013-03-06
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing interpenetrating network intelligent hydrogel by wave polymerization, which solves the problems of long polymerization time, phase separation and high energy consumption in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve N,N'-methylenebisacrylamide crosslinking agent and N-isopropylacrylamide monomer in dimethyl sulfoxide organic solvent at a mass ratio of 0.2:100 to form a uniform solution. 70%; then add linear polyethylene and pyrrolidone K30 with 20% monomer weight, and stir evenly; finally add azobisisobutyronitrile initiator with 2% monomer amount, mix evenly, and move it into a cylinder with a diameter of 50mm and a height of 1000mm In the polymerizer; heat one end of the reactor to initiate the polymerization reaction; after the reaction starts, remove the heat source, the heat generated by the polymerization itself will diffuse to the unreacted area, and continue to initiate polymerization until all the raw materials are completely polymerized; the semi-finished product is washed, dried, The final product is obtained after crushing.

Embodiment 2

[0027] The cross-linking agent N, N'-methylenebisacrylamide and the temperature-sensitive monomer N, N'-dimethylacrylamide are dissolved in the organic solvent of dimethylformamide according to the mass ratio of 0.5:100, and the formula Uniform solution, the monomer concentration is 60%; then add linear polyacrylic acid with monomer mass of 16% and stir evenly; finally add azobisisoheptanonitrile initiator with monomer amount of 1.6%, mix evenly and move into diameter 80mm, In a cylindrical polymerizer with a height of 1000mm; heat one end of the reactor to initiate polymerization; after the reaction starts, remove the heat source, and the heat generated by the polymerization itself will diffuse to the unreacted area, and continue to initiate polymerization until all raw materials are completely polymerized; the semi-finished product is washed , dried, and crushed to obtain the final product.

Embodiment 3

[0029] Dissolving N,N'-methylenebisacrylamide crosslinking agent and pH-sensitive monomer acrylic acid in a mass ratio of 0.8:100 in dimethyl sulfoxide organic solvent to form a uniform solution with a monomer concentration of 50%; Then add linear polyethylene and pyrrolidone K30 with 12% monomer mass, and stir evenly; finally add cumene hydroperoxide initiator with 1.2% monomer amount, mix evenly, and move it into a cylindrical polymerizer with a diameter of 100mm and a height of 1000mm ; Heating one end of the reactor to initiate the polymerization reaction; after the reaction starts, remove the heat source, the heat generated by the polymerization reaction diffuses to the unreacted area, and continues to initiate polymerization until all the raw materials are completely polymerized; the semi-finished product is washed, dried, and pulverized to obtain the final product. product.

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Abstract

A method for preparing interpenetrating network intelligent hydrogel by adopting frontal polymerization belongs to the technical field of functional high-polymer material preparation. The specific process is as follows: sensitive monomer, cross-linking agent, initiator and linear polymer are dissolved into dimethylsulfoxide or dimethylformamide solvent, the solution is added into a cylindrical polymerizer in certain size, one end of the reactor is heated to initiate polymerization reaction, the heat source is then removed, the polymerization heat produced by the reaction is utilized to initiate reaction layer by layer until the monomer in the whole reactor is completely polymerized, the product is taken out and immersed in deionized water, and after drying, the interpenetrating network intelligent hydrogel is obtained. The method has the advantages that: the process is simple, energy consumption is low, moreover, the structure of the prepared interpenetrating network intelligent hydrogel is uniform, the strength of the water-saturated hydrogel can reach 600KPa.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer materials, in particular to a method for preparing interpenetrating network intelligent hydrogel by wave polymerization. Background technique [0002] Smart hydrogel is a kind of polymer hydrogel whose properties will change significantly under the slight physical and chemical stimuli of the external environment, such as temperature, pH value, salt concentration, light, electric field, chemical substances, etc. Often referred to as sensitive hydrogels and stimuli-responsive hydrogels. The above characteristics of smart hydrogel make it widely used in high-tech fields such as controlled release of drugs, molecular separation, chemical converters, chemical memory, memory switches, sensors, intelligent immobilization of enzymes and cells, artificial muscles, and light-adjusting materials. Extensive research and application prospects. [0003] The disadvantage of low gel st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F271/02C08F265/02C08F265/10C08F251/02C08F220/54C08F220/56C08F2/46C08J3/075
Inventor 冯巧赵亚奇王勇陈湘李晓燕杜玲枝
Owner HENAN UNIV OF URBAN CONSTR