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Method for preparing pH-value-sensitive crosslinked fiber through low-temperature photopolymerization

A technology of low-temperature photopolymerization and photopolymerization of monomers, applied in the field of polymer materials, can solve problems such as taking a long time, and achieve the effect of simple preparation method and high degree of fiber formation

Inactive Publication Date: 2015-09-09
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that it takes a long time to convert the polymer into a nanoporous foam

Method used

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  • Method for preparing pH-value-sensitive crosslinked fiber through low-temperature photopolymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] With methacrylic acid and water-soluble polyethylene glycol (600) diacrylate mixture and photoinitiator 2959 (methacrylic acid / water-soluble polyethylene glycol (600) diacrylate mass ratio=0.1 / 9.9, 2959 Mass ratio with methacrylic acid and water-soluble polyethylene glycol (600) diacrylate mixture = 0.1 / 1) dissolved in solvent water (methacrylic acid and water-soluble polyethylene glycol (600) diacrylate mixture Mass ratio with water = 1 / 100), frozen at 0°C low temperature to freeze and crystallize water, cross-linked with ultraviolet light source light at 0°C low temperature, freeze-dried to remove solvent water, to obtain pH-sensitive cross-linked fibers, such as figure 1 shown.

Embodiment 2

[0028] The mixture of acrylic acid and water-soluble polyethylene glycol (20000) diacrylate and water-soluble camphorquinone photoinitiator (acrylic acid / water-soluble polyethylene glycol (20000) diacrylate mass ratio=9.9 / 0.1, The mass ratio=0.001 / 1 of the mixture of water-soluble camphorquinone photoinitiator and the mixture of acrylic acid and water-soluble polyethylene glycol (20000) diacrylate) is dissolved in solvent water (acrylic acid and water-soluble polyethylene glycol (20000) ) a mixture of diacrylate and water (mass ratio = 1 / 1000), freeze quickly at a low temperature of -197°C to freeze and crystallize the water, cross-link with visible light at a low temperature of -197°C, freeze-dry to remove solvent water, and obtain pH sensitive crosslinked fibers.

Embodiment 3

[0030] Mix N,N dimethylpropylacrylamide and water-soluble polyethylene glycol (4000) diacrylate mixture with water-soluble thioxanthone photoinitiator (N,N dimethylpropylacrylamide / water-soluble Proactive polyethylene glycol (4000) diacrylate mass ratio=5 / 5, water-soluble thioxanthone photoinitiator and N, N dimethyl propyl acrylamide and water-soluble polyethylene glycol (4000 ) mass ratio of diacrylate mixture=0.005 / 1) dissolved in solvent water (N, N dimethyl propyl acrylamide and water-soluble polyethylene glycol (4000) mass ratio of diacrylate mixture=5 / 10000 ), frozen at -50°C to crystallize the water, cross-linked with ultraviolet light at a low temperature of -20°C, and freeze-dried to remove solvent water to obtain pH-sensitive crosslinked fibers.

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Abstract

The invention provides a method for preparing pH-value-sensitive crosslinked fiber through low-temperature photopolymerization. The pH-value-sensitive crosslinked fiber provided by the invention is obtained by carrying out low-temperature photopolymerization reaction on a pH-value-sensitive photopolymerization monomer and poly(ethylene oxide) diacrylate under the initiation of a free radical photoinitiator, and can be used as a pH-value-sensitive tissue engineering scaffold, intelligent hydrogel and a drug controlled release carrier. The method comprises the steps of dissolving the pH-value-sensitive photopolymerization monomer, poly(ethylene oxide) diacrylate and the photoinitiator into water; carrying out low-temperature freezing to freeze water to form a crystal; and then, carrying out low-temperature illuminating and crosslinking as well as freeze drying to remove water to obtain the pH-value-sensitive crosslinked fiber. The method has the characteristics of simple preparation process, high speed and capability of finishing material crosslinking and fiber forming processes through one-step reaction.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing pH-sensitive cross-linked fibers by low-temperature photopolymerization. Background technique [0002] Fiber refers to a substance consisting of continuous or discontinuous filaments. Due to the advantages of small size, high aspect ratio, specific surface area and quantum size effect, the fibers have broad application prospects in tissue engineering scaffolds, advanced protective clothing, high-efficiency sensors, drug-controlled release carriers, and catalyst carriers. [0003] At present, the methods for preparing fibers mainly include template polymerization, electrospinning and phase separation. The template polymerization method is a method of preparing nanofibers or hollow nanofibers using nanoporous membranes as templates. The polymerization conditions of this method are easy to control, and there are few influencing factors for polymeriz...

Claims

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Application Information

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IPC IPC(8): D01F6/28C08F283/06C08F220/06C08F220/54C08F220/34
Inventor 王克敏张楠管佳瑜殷红陈佳杰
Owner CHANGZHOU UNIV
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