A kind of preparation method and application of polym-phenylene isophthalamide-polyacrylonitrile composite nanofiber membrane

A poly-m-phenylene isophthalamide and composite nanofiber technology is applied in fiber processing, single-component halogenated hydrocarbon man-made filament, filament/thread forming, etc., which can solve the cumbersome process of immobilizing enzymes, Low mechanical strength, difficult to recycle, etc., to achieve the effect of improving the utilization rate of enzymes, high mechanical strength, and easy recovery

Inactive Publication Date: 2016-04-06
TONGJI UNIV
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  • 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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  • A kind of preparation method and application of polym-phenylene isophthalamide-polyacrylonitrile composite nanofiber membrane
  • A kind of preparation method and application of polym-phenylene isophthalamide-polyacrylonitrile composite nanofiber membrane
  • A kind of preparation method and application of polym-phenylene isophthalamide-polyacrylonitrile composite nanofiber membrane

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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 16kV, a spinneret solution flow rate of 1mL / h, a receiving distance of 10cm, and a drum speed of 200r / min to obtain polyisophthalamide with a fiber diameter of about 200nm. For the amine-polyacrylonitrile nanofiber membrane, immerse the nanofiber membrane in distilled water for 2 hours, take out the membrane and dry it in a vacuum oven at 80°C for 12 hours. figure 1 Shown is the SEM characterization diagram of the prepared composite nan...

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 speed of 500 r / min to obtain polyisophthalamide with a fiber diameter of about 100 nm. For the m-phenylenediamine-polyacrylonitrile nanofiber membrane, immerse the nanofiber membrane in distilled water for 2 hours, take out the membrane and dry it in a vacuum oven at 60°C for 12 hours. figure 2 Shown is the SEM characterization of the prepared composite nanofibrous me...

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Abstract

The invention relates to a method for preparing a nanofiber film by blending polym-phenylene isophthalamide and polyacrylonitrile and its application. Specifically: prepare a polym-phenylene isophthalamide polymer solution with a mass percentage of 5-8%; prepare a polyacrylonitrile solution with a mass percentage of 5-8%; mix the two solutions at a ratio of 3:1-1 : 5 mass ratio mixing, polym-phenylene isophthalamide-polyacrylonitrile composite nanofiber membrane is made by electrospinning method, as the immobilized carrier of enzyme; through sodium hydroxide / ethylenediamine surface reaction The immobilized carrier of the enzyme is modified by the method; the enzyme is immobilized on the nanofiber membrane with active amino groups and carboxyl groups on the surface. The invention has the advantages of simple carrier preparation and enzyme immobilization process, high enzyme loading capacity, high catalytic activity, high mechanical strength of the carrier, repeated use and the like.

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 repeated use. [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 Utilizes m-p...

Claims

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Application Information

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