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room temperature shape memory material

A memory material, room temperature technology, applied in the composition field of shape memory materials, can solve the problems of no room temperature shaping, temporary shape cannot be maintained, etc., and achieve the effect of good shape memory.

Active Publication Date: 2020-11-20
NANJING SKY LONG PHARMA +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its temporary shape cannot be maintained during use and will gradually return to its original shape
[0005] Patent document CN101985518A describes a shape memory polymer with rubber-like elasticity, which has good elasticity at high and low temperatures, but it does not have the function of shaping at room temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The elastomer polymer is selected from two-component thermosetting silica gel, and the parts by weight are 80; the phase transition polymer is selected from polycaprolactone, and the parts by weight are 15; The parts by weight are 1.5.

[0027] The production method is as follows: (1) Heat the liquid silicone part, polycaprolactone and polyethylene of the corresponding parts by weight to 120°C to completely melt; (2) fully stir to mix Uniform, milky white; (3) Cool to room temperature (20-25°C); (4) Add the cross-linking agent part of the two-component thermosetting silica gel, mix well, and pour into the mold; (5) Under vacuum conditions, Degassing from the mixture; (6) heating at 100° C. for 1 hour to cure the mixture to obtain a rubber body material.

[0028] The shape fixation rate of the rubber body material obtained in this embodiment reaches 75%, the recovery rate reaches 95%, and the elastic modulus is 2.99 MPa.

Embodiment 2

[0030] The elastic body polymer is selected from two-component thermal curing silica gel, with 80 parts by weight; the transition phase polymer is selected from polycaprolactone, with 20 parts by weight; there is no added component.

[0031] The production method is the same as that in Example 1, and will not be repeated.

[0032]The shape fixation rate of the rubber body material obtained in this embodiment reaches 70%, the recovery rate reaches 90%, and the elastic modulus is 0.26 MPa.

Embodiment 3

[0034] The elastomeric polymer is made of two-component heat-curing silica gel, with 70 parts by weight; the transition phase polymer is made of polycaprolactone, with 30 parts by weight; there is no added component.

[0035] The production method is the same as that in Example 1, and will not be repeated.

[0036] The shape fixation rate of the rubber body material obtained in this embodiment reaches 80%, the recovery rate reaches 95%, and the elastic modulus is 0.18 MPa.

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Abstract

The invention relates to a room-temperature shaped shape memory material. The material is prepared from an elastic polymer material, a transition phase polymer material and an additive component material through blending; the elastic polymer material enables the blended material to have elasticity; the transition phase polymer material enables the blended material to have a thermal driving shape memory property; the additive component material can be used for adjusting an elastic performance of the blended material and a crystallization speed of softening the material and cooling the material to transition temperature; the transition temperature of the blended material is 50 DEG C to 90 DEG C; shaping hardening time at -5 DEG C to 60 DEG C is 0min to 30min; the elastic modulus of the material in a temperature range of -30 DEG C to 100 DEG C is 0.05MPa to 100MPa. The material provided by the invention has a heat driven shape memory property and has excellent elasticity at temperature higher than or lower than the transition temperature; after being softened by heating, the material can be shaped at a room-temperature condition to fix a temporary shape.

Description

technical field [0001] The invention relates to the composition of a shape memory material, in particular to a room temperature plastic shape memory material. Background technique [0002] Shape memory polymers, as a class of smart materials, have the function of returning from a temporary shape to its original shape under certain external stimuli. Such external stimuli include heat, light, electricity, magnetism, solvents, etc. Among them, thermotropic shape memory polymers are the most widely studied and applied. Shape memory polymers generally have two parts in structure: one part is the elastic phase; the other is the reversible phase. [0003] In the preparation process of thermally induced shape memory, the polymer is generally first heated to its reversible phase transition temperature (T trans ) above to soften the material, and apply an external force to deform it; then maintain the external force and cool to the transition temperature T trans Below (usually at r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L83/07C08L67/04C08L75/04C08L23/08C08L23/06C08L31/04C08L23/12C08L27/18C08K3/34C08K5/092
CPCC08L27/18C08L75/04C08L83/04C08L2201/12C08L2205/03C08L67/04C08L23/06C08K3/34C08K5/092C08L31/04C08K5/098C08L23/0853C08L23/12
Inventor 魏民陈红梅黄为民蒋旭彤
Owner NANJING SKY LONG PHARMA
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