Shape memory porous material and preparation method and application thereof

A porous material and memory technology, applied in the field of materials, to achieve the effects of easy structure and performance, large volume deformation, and biocompatibility

Inactive Publication Date: 2021-08-06
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the complex shortcomings and deficiencies in the preparation process of shape memory foam or sponge materials in the prior art, and propose a shape memory porous material, its preparation method and application

Method used

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  • Shape memory porous material and preparation method and application thereof
  • Shape memory porous material and preparation method and application thereof
  • Shape memory porous material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. For the preparation method of zwitterionic shape memory polymers, see Example 1 of the authorized invention patent of application number CN201410720521.4, so as to obtain shape memory polymers with good biocompatibility and wet response shape memory properties; then the The zwitterionic shape memory polymer is dissolved in a mixed solvent with a volume ratio of DMF:water=5:5 to obtain a zwitterionic shape memory polymer solution with a concentration of 1 wt%.

[0039] 2. Soak the sponge in the zwitterionic shape memory polymer solution for 10 minutes, then take out the sponge soaked in the shape memory polymer solution, such as figure 1Shown; placed in the air at room temperature for 10 minutes, let the excess solution flow out; then use freeze-drying equipment at -40 degrees Celsius for 36 hours to obtain the shape memory sponge; the dried sample (shape memory foam) and sponge raw material Comparison picture as figure 2 As shown, it is obvious that a large amount ...

Embodiment 2

[0041] 1. For the preparation method of hydrophilic shape memory polymer, please refer to the application number CN201580074457.X, which has authorized the invention patent Example 1 to prepare a hydrophilic shape memory polymer (TPEG 20); then the hydrophilic shape memory polymer The substance is heated and dissolved in water to obtain a shape memory polymer solution with a concentration of 40 wt %;

[0042] 2. Soak the sponge in the shape memory polymer solution for 5 minutes, then take out the sponge soaked in the shape memory polymer solution; place it in the air at room temperature for 5 minutes, let the excess solution flow out; and then process it with vacuum drying equipment at 50 degrees Celsius Within 24 hours, shape memory foam can be obtained;

[0043] 3. The dried sample (shape memory sponge) has a fluffy porous structure and a large volume, such as image 3 As shown; but under the condition of 50 degrees Celsius, for volume compression (a deformation method), th...

Embodiment 3

[0045] 1. For the preparation method of shape memory polymer, please refer to Example 1 of the authorized invention patent whose application number is CN201410357273.1, prepare a class of betaine type shape memory polymer (shape memory polymer based on DMAPS-AA), and then use the The shape memory polymer is dissolved in water to obtain a shape memory polymer solution with a concentration of 20 wt %;

[0046] 2. Soak the sponge in the shape memory polymer solution for 8 minutes, then take out the sponge soaked in the shape memory polymer solution; place it in the air at room temperature for 5 minutes, let the excess solution flow out; then use the freeze drying equipment at -40 degrees Celsius After processing for 36 hours, the shape memory foam can be obtained.

[0047] 3. After the shape memory sponge is compressed in volume at 50 degrees Celsius (a deformation treatment method), its shape can be fixed after volume compression at room temperature and under sealed conditions, ...

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Abstract

The invention relates to the field of shape memory materials, and in particular, relates to a shape memory porous material and a preparation method and application thereof. The invention provides the shape memory porous material. The preparation method of the shape memory porous material comprises the following steps: physically adhering a coating material and a porous material base material, wherein the coating material is a shape memory polymer. The shape memory sponge is simple in preparation method, and the structure and the performance are easy to regulate and control; the prepared shape memory porous material has the shape memory characteristic, is large in volume change, good in biocompatibility and non-toxic to a human body, and can be widely applied to the fields of medical care, textile and clothing, catalysis, aerospace, unmanned driving, heat insulation foam, oil stain absorption or dust particle absorption and the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a shape memory porous material and its preparation method and application. Background technique [0002] Shape memory polymers (Shape Memory Polymers, SMPs) are the most typical member of the smart material family. It mainly refers to a polymer with a certain initial shape. After a certain external action, after the deformation is fixed, it can be restored to its original state by external stimulation such as light, electricity, heat, and chemical conditions (pH, chelation reaction, and phase transition). shape polymer. Because of this special performance, SMPs have a wide range of applications, ranging from food utensils in daily life to engineering applications, aerospace, biomedical, smart textiles, sensor display devices, automatic control systems, etc. . Especially in the field of biomedical materials, it occupies a very important position. Currently, medical materials have been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/42C08L75/04C08L71/02C08L33/14
CPCC08J9/42C08J2475/04C08J2471/02C08J2433/14
Inventor 陈少军程慧峰卓海涛
Owner SHENZHEN UNIV
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