Preparation method of triple shape memory composite material

A composite material and memory technology, which is applied in the field of preparation of triple shape memory materials, achieves the effect of simple preparation method, good shape recovery and shape retention performance, and stable performance

Active Publication Date: 2015-09-09
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but usually only has a double memory effect

Method used

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  • Preparation method of triple shape memory composite material
  • Preparation method of triple shape memory composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Mix the epoxy resin: curing agent with a mass ratio of 5: 4, and mix them evenly by mechanical stirring, then add nano-silica and PEG (molecular weight: 200) and mix with a mass ratio of 10: 0.5 The solution is named as solution A after vacuuming and defoaming at 60°C for subsequent use, wherein the mass fraction of the mixed solution of nano-silica and PEG in solution A is 10%;

[0021] (2) Mix epoxy resin: curing agent: PEG according to the mass ratio of 5:4: 1.5, mix evenly by mechanical stirring, and name it as solution B after vacuumizing and defoaming at 60°C for later use;

[0022] (3) Pour 2 parts by weight of solution A into the mold, pre-cure at 60°C for 30 minutes, pour 1 part by weight of solution B, and continue curing for 3.5 hours to obtain the desired triple shape memory composite material.

[0023] figure 1 It is the DMA diagram of the triple shape memory composite material prepared in this example. It can be seen from the figure that the material ...

Embodiment 2

[0025] (1) Mix the epoxy resin: curing agent in a mass ratio of 5: 3, mix evenly by mechanical stirring, and then add nano-silica and PEG (molecular weight: 200) in a mass ratio of 10: 2. The solution is named as solution A after vacuuming and defoaming at 60°C for subsequent use, wherein the mass fraction of the mixed solution of nano-silica and PEG in solution A is 10%;

[0026] (2) Mix epoxy resin: curing agent: PEG according to the mass ratio of 5:4: 2, mix evenly by mechanical stirring, and name it as solution B after vacuumizing and defoaming at 60°C for later use;

[0027] (3) Pour 1 part by weight of solution A into the mold, precure at 60°C for 30 minutes, pour 1 part by weight of solution B, and continue curing for 3.5 hours to obtain the desired triple shape memory composite material.

[0028] The DMA diagram and the triple shape memory diagram of the sample prepared in this embodiment are similar to those in Example 1.

Embodiment 3

[0030] (1) Mix the epoxy resin: curing agent in a mass ratio of 5: 4, mix evenly by mechanical stirring, then add nano-silica and PEG (molecular weight: 200) and mix in a mass ratio of 10: 3 Solution, after vacuuming and defoaming at 60°C, it is named as solution A for later use, wherein the mass fraction of nano-silica / PEG solution in solution A is 10%;

[0031] (2) Mix epoxy resin: curing agent: PEG according to the mass ratio of 5:4: 2, mix evenly by mechanical stirring, and name it as solution B after vacuumizing and defoaming at 60°C for later use;

[0032] (3) Pour 2 parts by weight of solution A into the mold, pre-cure at 60°C for 30 minutes, pour 1 part by weight of solution B, and continue curing for 3.5 hours to obtain the desired triple shape memory composite material.

[0033] The DMA diagram and the triple shape memory diagram of the sample prepared in this embodiment are similar to those in Example 1.

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Abstract

The invention discloses a preparation method of a triple shape memory composite material. The method comprises two processes, namely, modification of a double shape memory material and preparation of the triple shape memory composite material. Firstly, the double shape memory material is modified, low-molecular-weight PEG (polyethylene glycol) and epoxy resin are mixed in different proportions, the GTT (glass transition temperature) of the double shape memory material is decreased, the low-molecular-weight PEG dispersed nano-silica and epoxy resin are mixed in different proportions, the GTT of the double shape memory material is increased, the double shape memory material with the low GTT and the double shape memory material with the high GTT are stacked, and the triple shape memory composite material is prepared. The method has the advantages that the technology is simple, preparation conditions are mild, the prepared material has the good shape memory effect and the like.

Description

technical field [0001] The invention relates to a preparation method of a shape memory composite material, in particular to a preparation method of a triple shape memory material. Background technique [0002] Shape memory polymers (SMPs) are a new type of functional polymer material with broad application prospects. Etc.), polymers that recover their original shape under the action of Conventional shape memory polymers are double shape memory polymers, which can be used in medical devices, smart textile materials, tubular materials, etc. Due to their excellent performance, they have received more and more attention in recent years. Triple shape memory polymer refers to a polymer that can fix two shapes, and can sequentially restore from one shape to another after heating, and finally return to the original shape. Polymers are more obvious and have the potential to be used in many fields. However, most of the triple shape polymers reported so far require complex molecular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L71/02C08K3/36
Inventor 李茜茜董余兵朱曜峰钱晨傅雅琴
Owner ZHEJIANG SCI-TECH UNIV
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