A kind of nanofibrous membrane with caterpillar structure and its preparation method and application

A technology of nanofiber membranes and caterpillars, applied in the direction of liquid repellent fibers, separation methods, fiber treatment, etc., can solve the problems of reduced separation efficiency, poor anti-pollution ability of organic matter, difficult to clean, etc., to improve mechanical properties, Effect of improving recycling ability and improving wettability

Active Publication Date: 2021-04-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the natural properties of polymers, such as polyacrylonitrile fiber membranes are easy to swell in water, the separation efficiency is reduced; secondly, polymer membranes often show poor anti-pollution ability to organic matter, and it is difficult to clean them after pollution; in addition, water pollution There are often crude oil spills and industrial discharges. The wastewater faced by the separation membrane itself is a complex system, including soluble dyes, heavy metals, and insoluble organic matter; this has higher requirements for membrane stability.

Method used

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  • A kind of nanofibrous membrane with caterpillar structure and its preparation method and application
  • A kind of nanofibrous membrane with caterpillar structure and its preparation method and application
  • A kind of nanofibrous membrane with caterpillar structure and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of a nanofibrous membrane of a caterpillar structure, comprising the following steps:

[0032] S1: Preparation of stabilized polyacrylonitrile (PAN) nanofibrous membrane

[0033] Mix polyacrylonitrile powder and N,N-dimethylformamide solution evenly to make spinning solution, and then spin polyacrylonitrile nanofiber membrane through electrospinning device, the polyacrylonitrile powder and the N, The ratio of the N-dimethylformamide solution is 1:10; the polyacrylonitrile nanofiber membrane is subjected to a gradient temperature rise treatment, and is heat-treated for 30 minutes under three temperature sections of 238°C, 248°C, and 260°C, and then Take out and cool to room temperature to prepare a stabilized polyacrylonitrile nanofiber membrane.

[0034] S2: Preparation of PANI / oPAN nanofibrous membrane

[0035] Prepare mixed solution A: add 1mL aniline to 33mL HCl solution and mix well; prepare mixed solution B: disperse 1gAPS into 8mL HCl; then ...

Embodiment 2

[0039] Different from Example 1, the reaction time of step S3 in this example is 6h.

Embodiment 3

[0041] Different from Example 1, the reaction time of step S3 in this example is 9 hours.

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Abstract

The invention discloses a nanofiber membrane with a caterpillar structure and its preparation method and application. The preparation method comprises the following steps: preparing a stabilized polyacrylonitrile nanofiber membrane; using aniline to stabilize the polyacrylonitrile modifying the nanofiber membrane to obtain a modified composite membrane; immersing the modified composite membrane in a precursor solution to react to prepare a nanofiber membrane with the caterpillar structure; the precursor solution includes cobalt nitrate hexahydrate, cobalt nitrate hexahydrate Nickel nitrate, and urea. The invention can improve the oil-water separation efficiency, improve the dye adsorption capacity, improve the regeneration utilization capacity of the membrane, and enable the efficient recycling of the membrane.

Description

technical field [0001] The invention relates to the technical field of nanofiber membranes, in particular to a nanofiber membrane with a caterpillar structure and its preparation method and application. Background technique [0002] Nanofiber membrane is a new type of separation membrane prepared by electrospinning technology and composed of fibers with diameters ranging from micrometers to nanometers. Since the nanofiber membrane is a membrane material composed of nanofibers, its high specific surface area, highly connected nanoscale pore structure and adjustable pore structure make it relatively traditional water treatment materials. It greatly improves its separation efficiency in the process of oil-water separation, dye, and heavy metal removal, reduces energy consumption in the separation process, and avoids secondary environmental pollution. It has become a new sewage treatment material. [0003] Polyacrylonitrile, because of its readily available raw materials, cheap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/43D04H1/728D06C7/00C02F1/40D06M15/61D06M101/28
CPCC02F1/40D04H1/43D04H1/728D06C7/00D06M15/61D06M2101/28D06M2200/11
Inventor 何毅李双双张李云李虹杰聂依玲
Owner SOUTHWEST PETROLEUM UNIV
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