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Core-shell structured polyvinylidene fluoride/polycarbonate superfine fiber and preparing method thereof

A technology of polyvinylidene fluoride and polycarbonate, applied in fiber processing, filament/wire forming, conjugated synthetic polymer artificial filament, etc. Problems such as adjusting the properties of the spinning solution and not being able to prepare the core/shell structure fibers, etc., to achieve the effect of simple and easy preparation

Inactive Publication Date: 2009-11-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when some specific multi-component polymer systems are used for electrospinning, due to the limitation of the type and composition of polymer raw materials, it is often not easy to conduct multi-component electrospinning only by adjusting the relative content and relative molecular weight of polymers and other factors. The properties of polymer electrospinning liquid can be effectively adjusted, which cannot make it suitable for the preparation conditions of core / shell structure fibers, making it difficult to prepare ultrafine fibers with obvious core / shell structure in electrospinning

Method used

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  • Core-shell structured polyvinylidene fluoride/polycarbonate superfine fiber and preparing method thereof
  • Core-shell structured polyvinylidene fluoride/polycarbonate superfine fiber and preparing method thereof
  • Core-shell structured polyvinylidene fluoride/polycarbonate superfine fiber and preparing method thereof

Examples

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Effect test

Embodiment 1

[0020] Take 0.54g of PC with a relative molecular mass of 31,000, dissolve it in a mixture of 3mL DMF and 1mL THF under magnetic stirring, and stir until it completely dissolves into a transparent solution. Add 0.18 g of PMMA with a relative molecular mass of 35,000 to it and continue stirring at 30-45° C. until uniform to obtain a transparent mixed solution. Another 1.26 g of PVDF with a relative molecular mass of 310,000 to 350,000 was added to 6 mL of DMF, and fully stirred at 30 to 45 ° C until completely dissolved into a transparent solution. The obtained PC mixed solution was added dropwise into the PVDF solution, and the stirring was continued for 1 h to obtain PMMA-containing PVDF / PC electrospinning solution for electrospinning. The syringe is secured to the microinjection pump, and a grounded metal drum receiver is placed 18 cm from the needle. Inject the above electrospinning solution into a 50mL syringe with a length of 3cm and a flat needle with an inner diameter ...

Embodiment 2

[0024]Take 0.54g of PC with a relative molecular mass of 31,000, dissolve it in a mixture of 3mL DMF and 1mL THF under magnetic stirring, and stir until it completely dissolves into a transparent solution. Add 0.09 g of PMMA with a relative molecular mass of 15,000 to it and continue to stir well at 30-45° C. until uniform to obtain a transparent mixed solution. Another 1.26 g of PVDF with a relative molecular mass of 310,000 to 350,000 was added to 6 mL of DMF, and fully stirred at 30 to 45 ° C until completely dissolved into a transparent solution. The obtained PC mixed solution was added dropwise into the PVDF solution, and the stirring was continued for 1 h to obtain PMMA-containing PVDF / PC electrospinning solution for electrospinning. The syringe is secured to the microinjection pump, and a grounded metal drum receiver is placed 18 cm from the needle. Inject the above electrospinning solution into a 50mL syringe with a length of 3cm and a flat needle with an inner diamet...

Embodiment 3

[0026] Take 0.54g of PC with a relative molecular mass of 31,000, dissolve it in a mixture of 3mL DMF and 1mL THF under magnetic stirring, and stir until it completely dissolves into a transparent solution. Add 0.27g of PMMA with a relative molecular weight of 35,000 to it and continue to stir well at 30-45°C until uniform to obtain a transparent mixed solution. Another 1.26 g of PVDF with a relative molecular mass of 310,000 to 350,000 was added to 6 mL of DMF, and fully stirred at 30 to 45 ° C until completely dissolved into a transparent solution. The obtained PC mixed solution was added dropwise into the PVDF solution, and the stirring was continued for 1 h to obtain PMMA-containing PVDF / PC electrospinning solution for electrospinning. The syringe is secured to the microinjection pump, and a grounded metal drum receiver is placed 18 cm from the needle. Inject the above electrospinning solution into a 50mL syringe with a length of 3cm and a flat needle with an inner diamet...

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Abstract

The present invention relates to a core-shell structured polyvinylidene fluoride (PVDF) / polycarbonate (PC) superfine fiber and a preparing method thereof. The PC and PVDF are used as raw materials, and the PMMA or BTEAC is added for preparing according to a proportion PVDF / PC=7-9 / 1-3. The adding amount of the PMMA or the BTEAC is respectively 5-20wt% and 1-4wt% of the total mass of the PC and the PVDF, and the diameter of the obtained fiber is 300-500nm. The preparing method of the invention specifically comprises the following processing steps: adding PMMA or benzyl triethyl ammonium chloride into the solution of the DMF / THF mixed solvent of PC, then addign the PVDF and DMF, mixing for obtaining the PVDF / PC dispersion containing PMMA or BTEAC as the electrospinning solution, and injecting the electrospinning solution into an electrospinning device for electrospinning. According to the invention, the PVDF / PC multi-component polymer electrospinning solution is modified through adding a third component (PMMA or BTEAC) into the PVDF / PC electrospinning solution so that the modified PVDF / PC electrospinning solution can form the superfine fiber which has uniform fiber appearance and complete core / shell structure in electrospinning. The preparing method is easy and feasible, and is suitable for preparing the superfine fiber with evident core / shell structure in electrospinning with other multi-component polymer system.

Description

technical field [0001] The present invention relates to a kind of polyvinylidene fluoride (PVDF) / polycarbonate (PC) microfiber of core-shell structure and preparation method, it is the method for preparing PVDF / PC superfine fiber with obvious core / shell structure, It belongs to the preparation technology of superfine fiber with special structure. Background technique [0002] Electrospinning of multi-component polymer blend solutions can be used to prepare nanoscale ultrafine fibers with a core / shell structure, and because the core and shell of ultrafine fibers can be prepared separately by selecting different types of polymers, and In order to achieve the performance that single-component polymer fibers cannot have at the same time, multi-component polymer fibers with a core / shell structure have broad application prospects in filter membranes, sensors, and the like. [0003] Polybutadiene (PB) / PC, PB / polymethyl methacrylate (PMMA), PB / polystyrene (PS), PMMA / PC, PMMA / PS, po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/10D01F8/16D01D5/34
Inventor 袁晓燕那海宁刘希望
Owner TIANJIN UNIV
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