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Preparation method of intelligent stress response material

A smart material and stress technology, applied in the field of materials, can solve the problems of poor stress response ability, low energy absorption rate, no self-healing performance, etc., and achieve the effect of good energy absorption rate and good stress response ability.

Active Publication Date: 2013-05-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process is relatively simple in this method, when the dilatant silicone emulsion is applied on the fabric to make a protective material, its stress response ability is poor, the energy absorption rate is low and it does not have self-healing properties.

Method used

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  • Preparation method of intelligent stress response material
  • Preparation method of intelligent stress response material
  • Preparation method of intelligent stress response material

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preparation example Construction

[0033] The invention provides a method for preparing a stress-responsive smart material, comprising the following steps:

[0034] A) Mix polydiorganosiloxane, boron-containing compound, bifunctional chain extender and functional modifier, react and dry to obtain a stress-responsive smart material precursor;

[0035] B) Post-processing the precursor of the stress-responsive smart material to obtain a stress-responsive smart material;

[0036] The post-treatment is one or more of heating, microwave radiation, mixing with a dispersant and then removing the dispersant, extrusion and rolling.

[0037] In the invention, polydiorganosiloxane, boron-containing compound, bifunctional chain extender and functional modifier are firstly mixed, reacted, and dried to obtain a stress-responsive intelligent material precursor.

[0038] The polydiorganosiloxane is dihydroxyl-terminated polydimethylsiloxane, and the molecular weight of the polydiorganosiloxane in the present invention is prefe...

Embodiment 1

[0070] 25 g of cyclohexyl ethylene borate and 75 g of polydimethylsiloxane with a molecular weight of 4000 were evenly mixed and stirred at 110° C. for 4 hours to obtain a first reaction liquid.

[0071] 5 g of bifunctional chain extender hexamethyl diisocyanate was added to the first reaction liquid, and the reaction was continued with stirring for 2 hours at a reaction temperature of 40° C. to obtain a second reaction liquid.

[0072] 3 g of functional modifier tetraisobutyl titanate was added to the second reaction liquid, and stirred and reacted at 70° C. for 8 hours to obtain a primary reaction product of nanoscale stress-responsive intelligent material.

[0073] Drying the primary reaction product of the nanoscale stress-responsive smart material at 70° C. for 24 hours can obtain a precursor of the stress-responsive smart material.

[0074] The stress-responsive smart material precursor was heated at 140° C. for 2 hours to obtain a stress-responsive smart material.

[0...

Embodiment 2

[0093] 15 g of tricresyl borate and 85 g of polydimethylsiloxane with a molecular weight of 6000 were evenly mixed and stirred at 90° C. for 3 hours to obtain a first reaction liquid.

[0094] 6 g of bifunctional chain extender hexamethyl diisocyanate was added to the first reaction liquid, and the reaction was continued with stirring for 6 hours at a reaction temperature of 60° C. to obtain a second reaction liquid.

[0095] To the second reaction liquid, 3 g of the functional modifier tetraisobutyl titanate was added to the first reaction liquid, and stirred and reacted at 70° C. for 8 hours to obtain the primary reaction product of the nanoscale stress-responsive smart material.

[0096] The primary reaction product of the nanoscale stress-responsive smart material was dried at 60° C. for 20 hours to obtain a precursor of the stress-responsive smart material.

[0097] The stress-responsive smart material precursor was heated at 180° C. for 0.5 hour to obtain a stress-respon...

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Abstract

The invention provides a preparation method of an intelligent stress response material, and the preparation method comprises the following steps of: (A) mixing organic polydimethylsiloxane, a boron-containing compound, a difunctional chain extender and a functional modifier, and reacting and drying to obtain an intelligent stress response material precursor; and (B) carrying out post processing on the intelligent stress response material precursor to obtain the intelligent stress response material, wherein the post processing is one or more of heating, microwave radiation, dispersant mixing, dispersant removal, extrusion and rolling. The intelligent stress response material provided by the invention has the advantages of better stress response capacity, high energy absorption rate and self-repairing property.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a stress-responsive intelligent material and a preparation method thereof. Background technique [0002] Stress-responsive smart materials mainly include impact-hardening materials and impact-softening materials, among which impact-hardening materials are widely used in sports protection, protective packaging, and military and police protective materials. [0003] The prior art discloses various impact hardening materials, such as boron crosslinked siloxane, which have dilatant properties and can exhibit a certain stress responsiveness. The Chinese patent literature with publication number CN101400516A discloses a preparation method of dilatant siloxane, which mixes polydiorganosiloxane, boron-containing compound and hydrophobic compound, and reacts at 150-200°C to obtain Organopolysiloxane with dilatant properties. In the process of preparing the organopolysiloxa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/398
Inventor 徐昆宋春雷谭颖王丕新李鹏翀刘畅路璀阁
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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