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Polymer material with two-way shape memory and preparation method thereof

A technology of polymer materials and memory polymers, which can be applied to household appliances, other household appliances, household components, etc., can solve the problems of high price, difficult preparation conditions, and high shape transition temperature, and achieve low cost, simple preparation technology, and easy Effects of operation and use

Active Publication Date: 2014-08-20
POLYU RES BASE SHENZHEN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These three types have their own advantages and disadvantages, such as: the first method is very difficult to prepare, the price is very expensive and the shape transition temperature is high; the second method does not have a two-way shape memory function in the absence of external force; the third method This method can only obtain reversible bending deformation
In summary, there is currently no bidirectional shape memory polymer that can achieve bidirectional elongation and contraction deformation without external force and at room temperature.

Method used

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  • Polymer material with two-way shape memory and preparation method thereof
  • Polymer material with two-way shape memory and preparation method thereof
  • Polymer material with two-way shape memory and preparation method thereof

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preparation example Construction

[0027] The present invention further proposes a method for preparing the above-mentioned polymer material with two-way shape memory, comprising the following steps:

[0028] S10, obtaining polymer raw materials containing crystalline polymer chain forging;

[0029] S20, obtaining elastic material polymer raw materials;

[0030] S30, mixing polymers containing crystalline polymer chain forging and elastic material polymers to form a mixture, and performing the first stimulation treatment on the mixture in the first stimulation mode, so that the crystalline polymer in the mixture is exchanged Linked to obtain a cross-linked polymer;

[0031] S40, after elongating and fixing the primary cross-linked polymer, perform a second stimulation treatment with a second stimulation method to make the elastic material polymer form a cross-link, that is, obtain the two-way shape memory polymer material of the present invention.

[0032] Among them, in steps S30 and S40, the purpose is to m...

Embodiment 1

[0043] raw material:

[0044] Polycaprolactone, self-made in the laboratory; its main indicators are: the polymer is end-capped with carbon-carbon double bonds, and the melting temperature is 35-40°C;

[0045] Polytetrahydrofuran, self-made in the laboratory; its main indicators are: the polymer is epoxy-terminated, and the molecular weight ranges from 750 to 1250;

[0046] Benzoin dimethyl ether, preferably purchased from Aldrich-sigma company;

[0047] Polytetrahydrofuran diamine, self-made in the laboratory; its main index is 250 molecular weight.

[0048] making process:

[0049] S10, mixing and dissolving polycaprolactone, polytetrahydrofuran, benzoin dimethyl ether, and polytetrahydrofuran diamine in dimethylformamide according to the content requirements of the product to form a mixture, and pouring it into a rectangular mold;

[0050] S20, using an ultraviolet lamp to irradiate the mixture for 2 hours to obtain a gel product;

[0051] S30, the gel product is elonga...

Embodiment 2

[0054] raw material:

[0055] Shape memory polyurethane, self-made in the laboratory; its main indicators are: the hard segment is 4,4'-diphenylmethane diisocyanate / 1,4-butanediol, the soft segment is polycaprolactone, and the melting temperature of the hard segment is 180 ~200℃, the melting temperature of the soft segment is 35~40℃;

[0056] Polyurethane elastomer, self-made in the laboratory; its main indicators are: the hard segment is hexamethylene diisocyanate / 1,4-butanediol, the soft segment is polytetrahydrofuran, the melting temperature of the hard segment is 130-150°C, and the soft segment is glass The transformation temperature is -20~-50℃;

[0057] Preparation:

[0058] S10, the above two polyurethane raw materials are uniformly dissolved in dimethylformamide according to the amount required by the product, and poured into a mold to form a film at 80°C;

[0059] S20, elongate the film to double and fix it, and put it in a 140°C oven for 1 minute;

[0060] S30, a...

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Abstract

The invention provides a polymer material with two-way shape memory. The polymer material comprises two interpenetrating network polymers which are arranged in an interpenetrating manner; and one network polymer is a shape memory polymer of crystallized crosslinked polymer, and the other network polymer is a crosslinked elastic material. According to the polymer material with two-way shape memory and based on the performance and structure principle of the interpenetrating network polymers, the two interpenetrating network polymers are arranged in an interpenetrating manner to form a memory polymer material, one is used as a shape memory contraction part which can be contacted due to heating; the other polymer network is used as an energy storage part; when the first network polymer is contacted due to heating and the second network polymer is compressed, the compressed second network polymer provides a restoring force for the first network polymer after heating is cancelled, so as to be used for restoring the shape before heating, so that the polymer material of the interpenetrating network manner has a two-way shape memory effect.

Description

technical field [0001] The invention belongs to the technical field of intelligent materials, and in particular relates to a polymer material with two-way shape memory and a preparation method thereof. Background technique [0002] Smart materials are a new type of functional materials that can perceive external stimuli, judge and process them appropriately, and can be executed by themselves. Smart materials are the fourth generation of materials following natural materials, synthetic polymer materials, and artificially designed materials, and are one of the important directions for the development of modern high-tech new materials. Among them, the shape memory material is the most widely studied intelligent material. It has some singular properties, such as shape memory effect, pseudoelasticity, high damping, etc., and can produce actions or certain specified functions after being stimulated by heat, machinery, magnetism or electricity. Response, making it return to the or...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L23/06C08L45/00C08L47/00C08L25/10C08L53/02C08L23/14C08L83/04C08J3/24
CPCB29C55/005B29K2105/0091B29K2105/246B29K2221/006B29K2995/0041C08L83/04B29K2009/00B29K2009/06B29K2021/00B29K2023/06B29K2023/18B29K2023/38B29K2075/00B29K2083/00B29L2031/731B29L2031/755B29L2031/7722C08L9/00C08L9/06C08L21/00C08L23/06C08L23/20C08L45/00
Inventor 胡金莲武友
Owner POLYU RES BASE SHENZHEN
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