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Shape memory material with fiber structure and preparation method of shape memory material

A memory material and fiber structure technology, applied in fiber processing, single-component polyurethane artificial filament, conjugated synthetic polymer artificial filament, etc., can solve the limitations of research and application, no microstructure construction, surface microstructure damage and other issues to achieve the effect of simple process

Active Publication Date: 2014-12-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the surface microstructure of shape memory polymer materials is often destroyed during the deformation process, there are almost no reports on the construction of its stable microstructure, which limits its related research and application.

Method used

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  • Shape memory material with fiber structure and preparation method of shape memory material
  • Shape memory material with fiber structure and preparation method of shape memory material
  • Shape memory material with fiber structure and preparation method of shape memory material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1) in N 2 Under protection, add HDI to a three-necked flask equipped with a stirrer, put the three-necked flask in an oil bath and heat it to 70°C, and then add the dehydrated N,N-dimethylformamide with a mass fraction of 50% PDA solution, mechanically stirred and reacted for 1 hour to prepare a HDI-terminated polyurethane prepolymer; cool the obtained HDI-terminated polyurethane prepolymer to 30°C, add γ-aminopropyltrimethoxysilane The reaction was carried out for 4 hours to obtain a silicone-methoxy-terminated polyurethane prepolymer (i.e. polymer 1); wherein: the molar ratio of PDA: HDI: γ-aminopropyltrimethoxysilane was 1: 3: 4;

[0050] 2) Take 2 g of the polymer 1 prepared in step 1) and use it as a spinning solution after being magnetically stirred evenly; introduce the spinning solution into an electrospinning device at room temperature for electrospinning, and collect the material with an aluminum foil collecting plate;

[0051] 3) Heat the material collected ...

Embodiment 2

[0054] 1) in N 2 Under protection, add NDI to a three-necked flask equipped with a stirrer, put the three-necked flask in an oil bath and heat to 90°C, and then add dehydrated 1,4-dioxane with a mass fraction of 30 % PCL solution, mechanically stirred and reacted for 5 hours to prepare an NDI-terminated polyurethane prepolymer; cool the obtained NDI-terminated polyurethane prepolymer to 50°C, and add γ-aminopropyltrimethoxysilane to react After 1.5 hours, the polyurethane prepolymer (i.e. polymer 1) terminated by silicon methoxy was obtained; wherein: the molar ratio of PCL: NDI: γ-aminopropyltrimethoxysilane was 1: 2.5: 1.5;

[0055] 2) Take 2 g of the polymer 1 prepared in step 1) and use it as a spinning solution after being magnetically stirred evenly; introduce the spinning solution into an electrospinning device at room temperature for electrospinning, and collect the material with an aluminum foil collecting plate;

[0056] 3) Soak the material collected on the aluminu...

Embodiment 3

[0059] 1) Under the protection of N2, add TDI to a three-necked flask equipped with a stirrer, put the three-necked flask into an oil bath and heat it to 60°C, and then add the dehydrated N-methylpyrrolidone with a mass fraction of 5% PEA solution, mechanically stirred and reacted for 4 hours to prepare a TDI-terminated polyurethane prepolymer; cool the obtained TDI-terminated polyurethane prepolymer to 30°C, add γ-glycidyl etheroxypropyl trimethoxy base silane was reacted for 0.5 hours to obtain a silicon ethoxy-terminated polyurethane prepolymer (i.e. polymer 1); wherein: the molar ratio of PEA: TDI: γ-glycidyl etheroxypropyltrimethoxysilane was 1: 1.1 : 0.1;

[0060] 2) 6g (60wt%) of polymer 1, 3.9g (39wt%) of polymer 2 solution and 0.1g (1wt%) of oxide precursor solution were magnetically stirred and mixed at room temperature to prepare a spinning solution;

[0061] The polymer 2 solution is 30wt% polystyrene N,N-dimethylformamide solution;

[0062] The oxide precursor s...

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Abstract

The invention belongs to the field of functional polymer materials, and particularly relates to a shape memory material with a fiber structure and a preparation method of the shape memory material. The shape memory material with the fiber structure is a material prepared by an electrostatic spinning method and adopting a reticulate structure formed by mutually interlaced fibers with the diameters of 50 nm to 10 Mum. Spinning liquid comprises 60-100wt% of siloxy terminated polyurethane prepolymer, 0-40wt% of polymer 2 solution and 0-1wt% of oxide precursor solution, wherein the siloxy terminated polyurethane prepolymer contains a segmer capable of generating phase variation. The shape memory material with the fiber structure has shape memorability; the shape fixing rate (Rf) of the shape memory material is usually greater than or equal to 90%; the shape recovery rate (Rr) of the shape memory material is usually greater than or equal to 95%; and the shape of the fiber structure remains stable before and after the deformation of the material.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, in particular to a shape memory material with a fiber structure and a preparation method thereof. technical background [0002] Shape memory materials refer to the stimuli that can perceive environmental changes (such as temperature, light, force, or chemical reagents, etc.), and adjust their mechanical parameters (such as shape, position, or strain, etc.) Functional materials with pre-set states. Shape memory materials can be divided into shape memory alloys, shape memory ceramic materials and shape memory polymer materials according to the chemical composition of the substrate. Among them, shape memory polymer materials are low cost, easy to process, light in weight, controllable temperature range, easy to adjust, good insulation, transparent materials can be prepared due to their high deformation rate, and in terms of biocompatibility and biodegradability. It has incomparable adva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D04H1/4382D01D5/00D01F6/70D01F8/16D01F8/10C08G18/30
Inventor 曹新宇陈辉玲马永梅张京楠童德文张晶晶江雷王佛松
Owner INST OF CHEM CHINESE ACAD OF SCI
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