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Coaxial polyphosphazene nanofiber composite membrane and preparation method thereof

A nanofiber, polyphosphazene technology, applied in fiber processing, textiles and papermaking, non-woven fabrics, etc., can solve the limitations of polyphosphazene nanofiber membrane preparation and its practical application, poor mechanical strength of nanofiber membrane materials, It is difficult to obtain polyphosphazene nanofiber membrane and other problems to achieve the effect of improving stability and mechanical strength, easy availability of raw materials and uniform shape

Inactive Publication Date: 2011-01-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many unsolved problems in these published techniques for preparing polyphosphazene nanofiber membrane materials by electrospinning, such as: the polyphosphazene materials that can be used for electrospinning and the organic solvents used are greatly affected. It is difficult to obtain polyphosphazene nanofiber membranes with complete fiber morphology and porous structure; at room temperature, polyphosphazene is a rubbery elastomer, and the mechanical strength of nanofiber membrane materials is relatively poor
These problems greatly limit the preparation and practical application of polyphosphazene nanofiber membranes. Therefore, it is of great importance to research and develop a polyphosphazene nanofiber composite membrane with stable morphology and good mechanical strength to make it widely used. the meaning of

Method used

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  • Coaxial polyphosphazene nanofiber composite membrane and preparation method thereof
  • Coaxial polyphosphazene nanofiber composite membrane and preparation method thereof
  • Coaxial polyphosphazene nanofiber composite membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A coaxial electrospinning device was used to dissolve poly-p-methylphenoxyphosphazene with a molecular weight of 200,000 in In dimethylformamide, be made into the poly-p-methylphenoxyphosphazene solution that weight percentage concentration is 25%, as coaxial electrospinning outer layer spinning liquid; In dimethyl sulfoxide, a polyacrylonitrile solution with a concentration of 25% by weight is prepared as the spinning solution for the inner layer of coaxial electrospinning; the polyacrylonitrile solution is injected into the inner layer of the coaxial spinneret, Inject the poly-p-methylphenoxyphosphazene solution into the outer layer of the coaxial spinneret, adjust the flow rate of the outer layer spinning solution to be 1mL / h, the flow rate of the inner layer spinning solution to be 1mL / h, and the receiving distance to be 15cm. The wire voltage is 10kV, and electrospinning is carried out to obtain coaxial fibers with polyacrylonitrile as the core and polyphosphazene...

Embodiment 2

[0032] A coaxial electrospinning device was used to dissolve poly-p-methylphenoxyphosphazene with a molecular weight of 600,000 in In dimethylacetamide, it is made into poly-p-methylphenoxyphosphazene solution with a concentration of 20% by weight as the outer layer spinning solution of coaxial electrospinning; the polyacrylonitrile solution with a molecular weight of 80,000 At In dimethylformamide, be made into the polyacrylonitrile solution that weight percent concentration is 20%, as coaxial electrospinning inner layer spinning liquid; Inject polyacrylonitrile solution into the inner layer of coaxial spinneret, will The poly-p-methylphenoxyphosphazene solution is injected into the outer layer of the coaxial spinneret, and the flow rate of the outer layer spinning solution is adjusted to 0.8mL / h, the flow rate of the inner layer spinning solution is 0.8mL / h, and the receiving distance is 20cm , The spinning voltage is 15kV, and electrospinning is carried out to obtain coaxi...

Embodiment 3

[0034] Using a coaxial electrospinning device, dissolving poly-p-methylphenoxyphosphazene with a molecular weight of 1,000,000 in tetrahydrofuran to prepare a solution of poly-p-methylphenoxyphosphazene with a concentration of 15% by weight, as Coaxial electrospinning outer layer spinning solution; polyacrylonitrile with a molecular weight of 100,000 is dissolved in In dimethylacetamide, be made into the polyacrylonitrile solution that weight percent concentration is 15%, as coaxial electrospinning inner layer spinning liquid; Inject polyacrylonitrile solution into the inner layer of coaxial spinneret, will The poly-p-methylphenoxyphosphazene solution is injected into the outer layer of the coaxial spinneret, and the flow rate of the outer layer spinning solution is adjusted to 0.5mL / h, the flow rate of the inner layer spinning solution is 0.5mL / h, and the receiving distance is 25cm. The spinning voltage is 18kV, and electrospinning is performed to obtain coaxial fibers with ...

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Abstract

The invention discloses a coaxial polyphosphazene nanofiber composite membrane which is prepared by the collection of coaxial fibers taking polyacrylonitrile as a core and polyphosphazene as a shell, wherein the diameters of the coaxial fibers are 30 nanometers to 3 microns. The invention also discloses a preparation method of the composite membrane, comprising the following steps of: adopting a coaxial electrostatic spinning device to inject polyacrylonitrile solution into the inner layer of a coaxial spinneret, and inject polyphosphazene solution into the outer layer of the coaxial spinneret, adjusting factors such as spinning voltage, the flow rate of spinning solutions at the inner layer and the outer layer and receiving the distance and the like, and carrying out coaxial electrostatic spinning and collecting, thus preparing the coaxial polyphosphazene nanofiber composite membrane. The preparation method is simple, the prepared coaxial polyphosphazene nanofiber composite membrane has stable morphostructure and good mechanical strength, and the fiber composite membrane has the core-shell structure and uniform shape.

Description

technical field [0001] The invention relates to the field of preparation of nanofiber composite membranes, in particular to a coaxial polyphosphazene nanofiber composite membrane and a preparation method thereof. Background technique [0002] As early as the 1930s, Formhals had reported in the patent US 1975504 the technology of spinning with high-voltage electrostatic field. However, it was not until the late 1990s that electrospinning, a spinning technology that can prepare micro-nano-scale fibers, received widespread attention due to the rapid increase in research on nanomaterials. The nanofibrous membrane prepared by electrospinning has the advantages of high porosity, large specific surface area, high fiber fineness and uniformity, and large aspect ratio, and has great potential applications in the fields of filtration, tissue engineering, and sensors. value. [0003] Patents US 20030215624 and US 20040013873 disclosed that common polymers such as polyvinyl alcohol, p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D04H3/16
Inventor 黄小军余安国刘振梅万灵书徐志康
Owner ZHEJIANG UNIV
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