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Preparation method and use method of triple-shape-memory polyampholyte hydrogel

A polyampholyte and hydrogel technology, which is applied in the field of shape memory polymer materials, can solve the problems of complex preparation process and many response conditions of triple shape memory hydrogel, so as to improve mechanical properties, increase application range and reduce The effect of complexity

Inactive Publication Date: 2019-07-19
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a triple shape memory polyampholyte hydrogel and its preparation method and use method to solve the problems of complex preparation process and many response conditions of the existing triple shape memory hydrogel

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  • Preparation method and use method of triple-shape-memory polyampholyte hydrogel

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Embodiment 1

[0033] The preparation method of the triple shape memory polyampholyte hydrogel of the present embodiment:

[0034] The polyelectrolyte hydrogel was synthesized by anionic monomer sodium p-styrenesulfonate, cationic monomer acryloyloxyethyl trimethyl ammonium chloride and urethyl methacrylate in a molar ratio of 50:50:1;

[0035] Then add the mixed solution of α-ketoglutaric acid and sodium chloride and irradiate with ultraviolet light to prepare the triple shape memory polyampholyte hydrogel; wherein α-ketoglutaric acid accounts for the moles of the total number of anionic monomers and cationic monomers The percentage is 0.5mol%, and the concentration of sodium chloride in the mixed solution is 0.1mol / L. The usage method of the triple shape memory polyampholyte hydrogel of the present embodiment comprises:

[0036](1) Soaking the triple shape memory polyampholyte hydrogel in the first sodium chloride solution, the shape of the obtained gel is the first shape;

[0037] (2) A...

Embodiment 2

[0043] In this embodiment, on the basis of Embodiment 1, the wavelength and irradiation time of ultraviolet rays are limited, the wavelength of ultraviolet rays is 300nm, and the irradiation time is 10h.

Embodiment 3

[0045] The preparation method of the triple shape memory polyampholyte hydrogel of the present embodiment:

[0046] The polyelectrolyte hydrogel was synthesized by anionic monomer sodium p-styrenesulfonate, cationic monomer acryloyloxyethyl trimethyl ammonium chloride and urethyl methacrylate in a molar ratio of 110:100:1;

[0047] Then add the mixed solution of α-ketoglutaric acid and sodium chloride and irradiate with ultraviolet light to prepare the triple shape memory polyampholyte hydrogel; wherein α-ketoglutaric acid accounts for the moles of the total number of anionic monomers and cationic monomers The percentage is 1.5mol%, and the concentration of sodium chloride in the mixed solution is 0.5mol / L.

[0048] The usage method of the triple shape memory polyampholyte hydrogel of the present embodiment comprises:

[0049] (1) Soaking the triple shape memory polyampholyte hydrogel in the first sodium chloride solution, the shape of the obtained gel is the first shape;

...

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Abstract

The invention discloses triple-shape-memory polyampholyte hydrogel as well as a preparation method and a use method thereof, and belongs to the technical field of shape memory polymer materials. The preparation method comprises the following steps: synthesizing polyelectrolyte hydrogel by adopting an anionic monomer sodium p-styrenesulfonate, a cationic monomer acryloyloxyethyltrimethyl ammonium chloride and a hydrogen bond introducing agent, then adding a mixed solution of an ultraviolet initiator and sodium chloride, and conducting irradiating by using ultraviolet rays to prepare the triple-shape-memory polyampholyte hydrogel. The preparation process is simple, the triple shape memory behavior of the polyampholyte hydrogel can be achieved only by adjusting the concentration of the sodiumchloride solution, and the complexity of shape memory behavior operation is reduced.

Description

technical field [0001] The invention relates to the technical field of shape-memory polymer materials, in particular to a triple shape-memory polyampholyte hydrogel and a preparation method and application method thereof. Background technique [0002] Shape memory hydrogel is a kind of special shape memory polymer containing a large amount of water, and its composition is very similar to biological tissue. It has great potential applications in biomedical materials and flexible drives. Usually, when the shape memory hydrogel is subjected to a specific external stimulus, its reversible cross-linked network changes, and external force can be used to fix it in a temporary shape; Return to its original shape under the action of elasticity. This change from the temporary shape to the original shape occurs spontaneously without external force and can be used to design flexible actuators. [0003] Polyampholyte refers to a class of polymers formed by random copolymerization of po...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08F2/48C08F212/14C08F220/34C08L33/12C08L33/14
CPCC08F2/48C08F212/14C08F220/34C08J3/075C08J2333/12C08J2333/14
Inventor 向韬武珊珊邵子健周绍兵王娇储成臻向臻田甜
Owner SOUTHWEST JIAOTONG UNIV
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