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A pressure sensitive shape memory material and its preparation method

A technology of memory materials and paraffin, applied in the field of shape memory materials, can solve the problems of difficult acquisition of raw materials, long time period, large capital investment, etc., and achieve the effect of cheap raw materials, developed pore structure and low cost

Active Publication Date: 2018-08-24
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently used pressure-sensitive memory materials have problems such as complex process, large initial capital investment, long time period, and difficult access to raw materials.

Method used

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  • A pressure sensitive shape memory material and its preparation method
  • A pressure sensitive shape memory material and its preparation method
  • A pressure sensitive shape memory material and its preparation method

Examples

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preparation example Construction

[0028] The preparation process of described paraffin and stearic acid mixture comprises the following steps:

[0029] (1) Weigh paraffin, petroleum ether, and stearic acid according to the mass ratio, and the quality is 1 part of paraffin, 2 to 4 parts of petroleum ether, and 0.1 to 0.5 parts of stearic acid;

[0030] (2) Put the weighed paraffin into a beaker and place it in a constant temperature water bath to melt;

[0031] (3) After the paraffin wax is completely melted, add the weighed stearic acid into the beaker to melt it completely, and stir evenly;

[0032] (4) Put petroleum ether into another beaker and place it in a constant temperature water bath to preheat, then pour petroleum ether into a beaker containing stearic acid and paraffin and stir until evenly mixed to obtain a mixture;

[0033] (5) After the petroleum ether volatilizes, a mixture of paraffin wax and stearic acid is obtained.

[0034] Wherein: the paraffin is sliced ​​paraffin with a melting point of...

Embodiment 1

[0039] The preparation process of described paraffin and stearic acid mixed solution comprises the following steps:

[0040] (1) Weigh paraffin, petroleum ether, and stearic acid according to the mass ratio, and the quality is 1 part of paraffin, 3 parts of petroleum ether, and 0.4 part of stearic acid;

[0041] (2) Put the weighed paraffin into a beaker and place it in a constant temperature water bath to melt;

[0042] (3) After the paraffin wax is completely melted, add the weighed stearic acid into the beaker to melt it completely, and stir evenly;

[0043] (4) Put petroleum ether into another beaker and place it in a constant temperature water bath to preheat, then pour petroleum ether into a beaker containing stearic acid and paraffin and stir until evenly mixed to obtain a mixture;

[0044] A preparation process of a pressure-sensitive shape-memory material comprises the following steps:

[0045] 1) Cut the PU porous sponge into a cuboid of 30mm*50mm*90mm, and preheat...

Embodiment 2

[0048] The preparation process of described paraffin and stearic acid mixed solution comprises the following steps:

[0049] (1) Weigh paraffin, petroleum ether, and stearic acid according to the mass ratio, and the quality is 1 part of paraffin, 3.5 parts of petroleum ether, and 0.4 part of stearic acid;

[0050] (2) Put the weighed paraffin into a beaker and place it in a constant temperature water bath to melt;

[0051] (3) After the paraffin wax is completely melted, add the weighed stearic acid into the beaker to melt it completely, and stir evenly;

[0052] (4) Put petroleum ether into another beaker and place it in a constant temperature water bath to preheat, then pour petroleum ether into a beaker containing stearic acid and paraffin and stir until evenly mixed to obtain a mixture;

[0053] A preparation process of a pressure-sensitive shape-memory material comprises the following steps:

[0054] 1) Cut the PU porous sponge into a cuboid of 30mm*50mm*90mm, and prehe...

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Abstract

The invention discloses a pressure-sensitive shape memory material and a preparation method thereof. With PU sponge serving as an elastic phase of the shape memory material and a paraffin and stearic acid mixture attached to the inner wall of the PU sponge serving as a variable phase, the pressure-sensitive shape memory material is formed. The preparation method includes the following steps that 1, the PU sponge is cut into a proper size as needed and then preheated for 1 h in a 110 DEG C oven; 2, the sponge in the oven is taken out and put into prepared mixed liquor for full absorption, the sponge is compressed to the length 30%-70% the original length after complete absorption, and the pressure-sensitive shape memory material is obtained after petroleum ether volatilizes. Compared with an existing shape memory material, according to the porous pressure-sensitive shape memory material, the preparation process is simple, reaction conditions are mild, raw materials are cheap, industrial production is easy to achieve, and the porous pressure-sensitive shape memory material has broad application prospects in the field of shape memory.

Description

technical field [0001] The invention belongs to the field of shape-memory materials, is a novel smart material, and in particular relates to a porous pressure-sensitive shape-memory material and a preparation method thereof. Background technique [0002] Shape memory polymer materials are a new type of functional polymer materials. According to the different conditions for realizing the memory function, they can be divided into different types such as thermal response type, photoinduced response type, acid-base response type, and magnetic response type. The processing of shape memory polymer products generally includes deformation from the initial form to a temporary form under certain conditions (such as heat, light, magnetism, etc.); and then returning to the original form from the temporary form under deformation conditions. [0003] The polymer material with shape memory function can be a single-component polymer, or a block or graft copolymer or blend of two components ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L91/06C08K5/09
CPCC08L75/04C08L2201/12C08L91/06C08K5/09
Inventor 王倡春任金刚张佳星张京徽黄泽慧谢忱鲁天暄
Owner NANJING INST OF TECH