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Preparation method and application of polyisophthaloyl metaphenylene diamine-polyacrylonitrile composite nanofiber film

A technology of polym-phenylene isophthalamide and composite nanofibers, which is applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., and can solve problems such as difficult recycling, low mechanical strength, and cumbersome immobilized enzyme process , to achieve the effects of easy recycling, high mechanical strength, and improved utilization of enzymes

Inactive Publication Date: 2014-04-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problems of low mechanical strength of immobilized materials, cumbersome immobilized enzyme process and difficulty in recycling, the present invention provides a method for preparing a polym-phenylene isophthalamide-polyacrylonitrile composite nanofiber membrane with high mechanical strength and its application

Method used

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  • Preparation method and application of polyisophthaloyl metaphenylene diamine-polyacrylonitrile composite nanofiber film
  • Preparation method and application of polyisophthaloyl metaphenylene diamine-polyacrylonitrile composite nanofiber film
  • Preparation method and application of polyisophthaloyl metaphenylene diamine-polyacrylonitrile composite nanofiber film

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Embodiment 1

[0030] 1. Dissolving the polym-phenylene isophthalamide polymer in N,N-dimethylacetamide solution (containing 8% lithium chloride by mass percentage) to form a solution with a mass percentage of 5%, Dissolve polyacrylonitrile in N,N-dimethylacetamide solution to prepare a 5% solution by mass. The above-mentioned polym-phenylene isophthalamide and polyacrylonitrile solution were blended to form a solution with a mass ratio of 1:3, and injected into the electrospinning device. Electrospinning was carried out under the conditions of a voltage of 16 kV, a spinneret solution flow rate of 1 mL / h, a receiving distance of 10 cm, and a drum rotation speed of 200 r / min to obtain polyresorcinol with a fiber diameter of about 200 nm. For m-phenylenediamine formamide-polyacrylonitrile nanofiber membrane, the nanofiber membrane was immersed in distilled water for 2 h, and the membrane was taken out and dried in a vacuum oven at 80°C for 12 h. figure 1 Shown is the SEM characterization di...

Embodiment 2

[0033] 1. Dissolve polym-phenylene isophthalamide polymer in N,N-dimethylacetamide solution (containing 10% lithium chloride by mass percentage) to form a 5% solution by mass, Dissolve polyacrylonitrile in N,N-dimethylacetamide solution to prepare a 5% solution by mass. The above-mentioned polym-phenylene isophthalamide and polyacrylonitrile solution were blended to form a solution with a mass ratio of 3:1, and injected into the electrospinning device. Electrospinning was carried out under the conditions of a voltage of 16 kV, a spinneret solution flow rate of 0.5 mL / h, a receiving distance of 10 cm, and a drum rotation speed of 500 r / min to obtain polymethane with a fiber diameter of about 100 nm. Diformyl m-phenylenediamine-polyacrylonitrile nanofiber membrane, immerse the nanofiber membrane in distilled water for 2 h, take out the membrane and dry it in a vacuum oven at 60°C for 12 h. figure 2 Shown is the SEM characterization of the prepared composite nanofibrous membra...

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Abstract

The invention relates to a method for preparing a nanofiber film by blending polyisophthaloyl metaphenylene diamine and polyacrylonitrile and application of the nanofiber film. The preparation method concretely includes the steps that a polyisophthaloyl metaphenylene diamine polymer solution with the 5-8% mass percent is prepared; a polyacrylonitrile solution with the 5-8% mass percent is prepared; the two solutions are blended with the mass ratio of polyisophthaloyl metaphenylene diamine :polyacrylonitrile=3:1-1:5, and the polyisophthaloyl metaphenylene diamine-polyacrylonitrile composite nanofiber film is prepared through a electrostatic spinning method and serves as an enzyme immobilization carrier; the enzyme immobilization carrier is modified through a sodium hydroxide / ethylenediamine surface reaction method; enzymes are immobilized on the nanofiber film with reactive amino groups and reactive carboxy groups on the surface. According to carrier preparation and the enzyme immobilization process, the preparation method and the application of the polyisophthaloyl metaphenylene diamine-polyacrylonitrile composite nanofiber film have the advantages that operation is easy, enzyme loading, catalytic activity and mechanical strength of the carrier are high, and the polyisophthaloyl metaphenylene diamine-polyacrylonitrile composite nanofiber film can be used repeatedly.

Description

technical field [0001] The invention relates to a preparation method and application of polym-phenylene isophthalamide-polyacrylonitrile composite nanofiber membrane. Background technique [0002] The catalytic activity of free enzymes is easily affected by factors such as pH, temperature, and organic solvents. Compared with free enzymes, immobilized enzymes are beneficial to improve the stability and catalytic activity of enzymes under extreme conditions, and have the advantages of easy separation and recovery, and can be reused many times. [0003] At present, many materials and methods for immobilizing enzymes have emerged, among which nanomaterials for immobilizing enzymes are favored by researchers because of their high enzyme loading capacity, especially some carrier materials with porous structures and large specific surface areas. In recent years, the use of electrospun nanofibers to immobilize enzymes has become an emerging research hotspot. [0004] CN102400242A ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/16D01D5/00D01F6/48D01F1/10
Inventor 徐冉李风亭潘艳
Owner TONGJI UNIV
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