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Preparation method of PVA composite material with shape memory function

A composite material and memory technology, which is applied in the field of PVA composite material preparation with shape memory function, can solve the problem that the mechanical properties and shape memory ability of modified PVA film cannot meet the requirements of micromechanical systems and medical device applications, inorganic materials and polymer substrates Problems such as poor compatibility and weakening of PVA's green characteristics have achieved the effects of universality, easy large-scale production, and low cost

Pending Publication Date: 2019-10-18
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inorganic materials used in this type of modification have poor compatibility with the polymer matrix, and these fillers cannot be degraded, which weakens the biodegradable green characteristics of PVA
In addition, adding compatibilizers, lubricants, and antioxidants will lead to high costs
[0006] More importantly, the mechanical properties and shape memory ability of modified PVA films prepared by traditional methods are difficult to meet the application in micromechanical systems and medical devices.

Method used

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  • Preparation method of PVA composite material with shape memory function
  • Preparation method of PVA composite material with shape memory function
  • Preparation method of PVA composite material with shape memory function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Weigh 3g of PVA and add it into a three-necked flask filled with 30ml of deionized water, control the heating temperature to 50°C and stir for 90min, at which point the PVA has completely dissolved. A certain amount of modified MHSH / POSS hybrid material (the mass ratio of hybrid material to PVA is 1%) was added into 10ml of deionized water and ultrasonicated for a period of time until the whiskers were evenly dispersed. Then slowly pour the dispersion into the completely dissolved PVA solution, and continue stirring for 3 hours until no bubbles are generated in the system.

[0056] Finally, the PVA / MHSH mixture was slowly poured into a square glass mold to dry naturally, and then the film was peeled off to complete the preparation of the PVA composite material.

Embodiment 2

[0058] Weigh 3g of PVA and add it into a three-neck flask filled with 30ml of deionized water, control the heating temperature to 120°C and stir for 90min, at which point the PVA has completely dissolved. A certain amount of modified MHSH / POSS hybrid material (the mass ratio of hybrid material to PVA is 20%) was added into 10ml of deionized water and ultrasonicated for a period of time until the whiskers were evenly dispersed. Then slowly pour the dispersion into the completely dissolved PVA solution, and continue stirring for 3 hours until no bubbles are generated in the system.

[0059] Finally, the PVA / MHSH mixture was slowly poured into a square glass mold to dry naturally, and then the film was peeled off to complete the preparation of the PVA composite material.

Embodiment 3

[0061] Weigh 3g of PVA and add it into a three-necked flask filled with 30ml of deionized water, control the heating temperature to 100°C and stir for 90min. At this time, the PVA has completely dissolved. A certain amount of modified MHSH / POSS hybrid material (the mass ratio of hybrid material to PVA is 10%) was added into 10ml of deionized water and ultrasonicated for a period of time until the whiskers were uniformly dispersed. Then slowly pour the dispersion into the completely dissolved PVA solution, and continue stirring for 3 hours until no bubbles are generated in the system.

[0062] Finally, the PVA / MHSH mixture was slowly poured into a square glass mold to dry naturally, and then the film was peeled off to complete the preparation of the PVA composite material.

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Abstract

The invention relates to a preparation method of a PVA composite material with shape memory function. The preparation method includes: introducing an inorganic whisker / POSS hybrid material into a PVAmatrix, and utilizing solution casting process to prepare the PVA composite material. The method provided by the invention firstly introduces POSS molecules modified by groups with different activities and different numbers to the surface of a sulfhydrylated inorganic whisker, creates a novel inorganic whisker / POSS multiscale hybrid material, also introduces the inorganic whisker / POSS hybrid material into a PVA matrix, greatly reduces the whisker surface energy and improves the dispersibility of the whisker in the polymer and the compatibility with PVA, and the obtained PVA composite materialhas greatly improved mechanical properties, water resistance, shape memory ability, etc., thus broadening the application of PVA.

Description

technical field [0001] The invention belongs to the field of PVA modification, and in particular relates to a preparation method of a PVA composite material with a shape memory function. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The molecular structure of polyvinyl alcohol (PVA) contains a large number of hydroxyl groups, which can form stable intramolecular and intermolecular hydrogen bonds, so it has the advantages of good film-forming properties and biocompatibility, and is a good polymer matrix. Due to the characteristics of non-toxic and tasteless, no dust absorption, good transparency and excellent mechanical properties, PVA film has broad application prospec...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L83/04C08K7/08C08K9/06C08J5/18
CPCC08J5/18C08J2329/04C08J2483/04C08K9/06C08K7/08
Inventor 高传慧陈颖赵文鹏董亚洁王思凯刘月涛武玉民
Owner QINGDAO UNIV OF SCI & TECH