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Composite shape memory fiber with thermosetting/thermoplastic core-shell structure and preparation method of composite shape memory fiber

A core-shell structure and composite fiber technology, applied in fiber processing, filament/thread forming, conjugated synthetic polymer artificial filament, etc., can solve the problem of not having the scope of biological applications, and the inability to obtain micro-nano-sized structure applications, etc. problems, to achieve excellent shape memory performance, low cost, and simple spinning process

Active Publication Date: 2014-09-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the previous studies on thermosetting epoxy shape memory polymers are bulk materials. Due to the size effect and the structural characteristics of the material, there are certain limitations. Only macroscopic and large-scale devices can be prepared, and micro-nano-sized structures cannot be applied.
At the same time, the scope of application is limited due to the fact that epoxy shape memory polymers do not have the characteristics of biological applications.

Method used

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  • Composite shape memory fiber with thermosetting/thermoplastic core-shell structure and preparation method of composite shape memory fiber
  • Composite shape memory fiber with thermosetting/thermoplastic core-shell structure and preparation method of composite shape memory fiber
  • Composite shape memory fiber with thermosetting/thermoplastic core-shell structure and preparation method of composite shape memory fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Polycaprolactone (PCL, molecular weight 50000) and benzophenone are dissolved in a mixed solvent of dichloromethane and N,N-dimethylformamide in a volume ratio of 4:1 in a mass ratio of 10:1 In the method, a solution having a polycaprolactone concentration of 15wt% was prepared, and stirred at room temperature until the two substances were mixed and dispersed evenly to obtain a uniform electrospinning solution;

[0026] (2) Mix the epoxy resin (E51) and the curing accelerator triethanolamine according to the mass ratio of 80:30, stir at room temperature until uniform, and use it as the core layer spinning solution;

[0027] (3) the polycaprolactone solution that above-mentioned step (1) is made is as shell layer spinning liquid, and the epoxy resin solution that step (2) makes is as nuclear layer spinning liquid, injects respectively into the coaxial spinning needle The shell and the core are coaxially electrospun under ultraviolet light. The spinning parameters are...

Embodiment 2

[0030] (1) Polycaprolactone (PCL, molecular weight 50000) and benzophenone are dissolved in a mixed solvent of dichloromethane and N,N-dimethylformamide in a volume ratio of 4:1 in a mass ratio of 10:1 In the solution, the concentration is prepared into a solution of 15wt%, stirred at room temperature until the two substances are mixed and dispersed evenly, and a uniform electrospinning solution is obtained;

[0031] (2) Mix epoxy resin (E51) and curing accelerator triethanolamine according to a mass ratio of 80:30, and stir at room temperature until uniform;

[0032] (3) the polycaprolactone solution that above-mentioned step (1) is made is as shell layer spinning liquid, and the epoxy resin solution that step (2) makes is as nuclear layer spinning liquid, injects respectively into the coaxial spinning needle The shell and the core are coaxially electrospun under ultraviolet light. The spinning parameters are: the inner diameter of the shell is 1 mm, the inner diameter of the...

Embodiment 3

[0036] (1) Polycaprolactone (PCL, molecular weight 50000) and benzophenone are dissolved in a mixed solvent of dichloromethane and N,N-dimethylformamide in a volume ratio of 4:1 in a mass ratio of 10:1 In the solution, the concentration is prepared into a solution of 15wt%, stirred at room temperature until the two substances are mixed and dispersed evenly, and a uniform electrospinning solution is obtained;

[0037] (2) Mix epoxy resin (E51) and curing accelerator triethanolamine according to a mass ratio of 80:30, and stir at room temperature until uniform;

[0038](3) the polycaprolactone solution that above-mentioned step (1) is made is as shell layer spinning liquid, and the epoxy resin solution that step (2) makes is as nuclear layer spinning liquid, injects respectively into the coaxial spinning needle The shell and the core are coaxially electrospun under ultraviolet light. The spinning parameters are: the inner diameter of the shell is 1 mm, the inner diameter of the ...

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Abstract

The invention discloses a composite shape memory fiber with a thermosetting / thermoplastic core-shell structure and a preparation method of the composite shape memory fiber. According to the composite shape memory fiber, thermosetting epoxy resin serves as a core layer, and a thermoplastic polycaprolactone serves as a shell layer. The method comprises the following steps: dissolving polycaprolactone and an initiator in a solvent as a shell-layer spinning solution; dissolving epoxy resin E51 and a curing catalyst in a solution as a core-layer spinning solution; preparing the composite shape memory fiber by using a coaxial electrostatic spinning method. The composite shape memory fiber is excellent in shape memory performance, and a quick shape recovery process can be realized within 5-7s; meanwhile, the composite shape memory fiber has a stable network structure and a simple spinning process, and is low in cost; a membrane material with a composite fiber structure is easily prepared.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, in particular to a shape memory composite fiber with a thermosetting / thermoplastic core-shell structure and a preparation method thereof. Background technique [0002] Shape memory polymer is a very important smart material, which can sense environmental changes and respond to external stimuli (heat, electricity, magnetism, light, solvents, etc.), and can return to the original shape from the given shape. Due to the characteristics of light weight, large deformation, low cost and easy processing, shape memory polymers are widely used in aerospace, biomedicine, smart textiles, electronic communications and other fields. As a cutting-edge research field, shape memory polymers show strong application prospects. [0003] Electrospinning technology is a simple, efficient and practical method to prepare polymer nanofibers. Nanofibers prepared by electrospinning have many excellent properti...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F8/16D01D5/34
Inventor 冷劲松刘彦菊张风华张志春
Owner HARBIN INST OF TECH
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