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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] N-isopropylacrylamide and water-soluble polyethylene glycol (600) diacrylate mixture with photoinitiator 2959 (N-isopropylacrylamide / water-soluble polyethylene glycol (600) diacrylate Mass ratio = 0.1 / 9.9, 2959 and N-isopropylacrylamide and water-soluble polyethylene glycol (600) diacrylate mixture mass ratio = 0.1 / 1) dissolved in solvent water (N-isopropylacrylamide The mass ratio of amide and water-soluble polyethylene glycol (600) diacrylate mixture to water = 1 / 100), frozen at 0°C to freeze and crystallize the water, and cross-linked by ultraviolet light at 0°C , freeze-dried to remove the solvent water, and obtained temperature-sensitive crosslinked fibers, such as figure 1 shown.

Embodiment 2

[0028] The mixture of N-tert-butylacrylamide and water-soluble polyethylene glycol (20000) diacrylate and water-soluble camphorquinone photoinitiator (N-tert-butylacrylamide / 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 acrylic acid and water-soluble polyethylene glycol (20000) diacrylate) is dissolved in solvent water (The mass ratio of N-tert-butylacrylamide and water-soluble polyethylene glycol (20000) diacrylate mixture to water = 1 / 1000), frozen at -197 ° C to freeze and crystallize water, at -197 The visible light source is irradiated and cross-linked at a low temperature of ℃, and the solvent water is removed by freeze-drying to obtain a temperature-sensitive cross-linked fiber.

Embodiment 3

[0030] Mix N,N diethylacrylamide and water-soluble polyethylene glycol (4000) diacrylate mixture with water-soluble thioxanthone photoinitiator (N,N diethylacrylamide / water-soluble polyethylene glycol Diol (4000) diacrylate mass ratio=5 / 5, water-soluble thioxanthone photoinitiator and N,N diethylacrylamide and water-soluble polyethylene glycol (4000) diacrylate mixture Mass ratio = 0.005 / 1) dissolved in solvent water (mass ratio of N, N diethylacrylamide and water-soluble polyethylene glycol (4000) diacrylate mixture = 5 / 10000), frozen at -50 ° C , making water freeze crystallization, cross-linking with ultraviolet light source light at -20°C, freeze-drying to remove solvent water, and obtaining temperature-sensitive cross-linked fibers.

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Abstract

The invention provides a method for preparing temperature-sensitive crosslinked fiber through low-temperature photopolymerization. The temperature-sensitive crosslinked fiber provided by the invention is obtained by carrying out low-temperature photopolymerization reaction on a temperature-sensitive photopolymerization monomer and poly(ethylene oxide) diacrylate under the initiation of a free radical photoinitiator, and can be used as a temperature-sensitive tissue engineering scaffold, intelligent hydrogel and a drug controlled release carrier. The method comprises the steps of dissolving the temperature-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 temperature-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 temperature-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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/36C08F220/28C08F220/54C08F2/48
Inventor 王克敏张楠管佳瑜殷红陈佳杰
Owner CHANGZHOU UNIV
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