Preparation method for anti-ultraviolet polyacrylonitrile nanofiber membrane

A technology of nanofiber film and polyacrylonitrile, applied in flat products, other household utensils, household utensils, etc., can solve the problem of insufficient ultraviolet shielding of conventional fabrics, achieve good anti-ultraviolet performance, good practical value and potential value, experiment The effect of mild conditions

Inactive Publication Date: 2017-08-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For people who are active outdoors, clothing is the main barrier against excessive UV radiation, but the ability of conventional fabrics to block UV rays is not enough

Method used

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  • Preparation method for anti-ultraviolet polyacrylonitrile nanofiber membrane
  • Preparation method for anti-ultraviolet polyacrylonitrile nanofiber membrane
  • Preparation method for anti-ultraviolet polyacrylonitrile nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of polyacrylonitrile nanofiber membrane comprises the steps:

[0029] Step 1: Accurately weigh 0.4g of polyacrylonitrile powder, dissolve it in 5ml of DMF and magnetically stir in a constant temperature water bath at 60°C for 12h to obtain a transparent and homogeneous spinning solution of 0.08g / ml.

[0030] Step 2: Adjust the spinning parameters as positive voltage 7v, negative voltage -8v, spinning speed 0.5ml / h, and spinning distance 18cm.

[0031] Step 3: Prepare the polyacrylonitrile nanofiber membrane by electrospinning method, then let it stand for 10 minutes, and then put it into a constant temperature drying oven at 37°C to dry to obtain the polyacrylonitrile nanofiber membrane, as shown in figure 1 shown.

Embodiment 2

[0033] The preparation of graphene oxide spreading solution and the spreading of monomolecular layer on water surface comprise the steps:

[0034] Step 1: First, configure 3.0ml of a 1.0mg / ml graphene oxide aqueous solution, then add 6.0ml of methanol to the above solution, and stir for 20min to obtain a graphene oxide spreading solution with a final concentration of 0.111mg / ml.

[0035] Step 2: Take 10.0ml of the above-mentioned graphene oxide spreading solution, and carefully spread it drop by drop on the water surface in the LB tank with an area of ​​10*20cm, and let it stand for 20 minutes. After the methanol on the water surface is completely volatilized, move the sliding barrier , the speed is 0.5cm / min, when the distance to the sliding barrier is 1cm, stop moving, let it stand still, and wait for the self-assembly of monomolecular layer graphene oxide film to form.

Embodiment 3

[0037] The preparation of monolayer graphene oxide monomolecular layer coating polyacrylonitrile nanofiber membrane comprises the following steps:

[0038] Cut the polyacrylonitrile nanofiber membrane into a sample with a size of 5cm*2.5cm. By controlling the parameters of the film pulling machine and setting the dipping speed to 10mm / min, the polyacrylonitrile nanofiber membrane is immersed in the LB water tank and immersed in the water below the liquid surface. The length is 4cm. After waiting for the liquid level to stabilize for 20 minutes, pull the polyacrylonitrile nanofiber membrane at a pulling speed of 0.5mm / min to realize the transfer of monomolecular layer graphene oxide on the water surface to the surface of the polyacrylonitrile nanofiber membrane to obtain a single layers of graphene oxide-coated polyacrylonitrile nanofiber membranes, such as figure 2 shown.

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Abstract

The invention relates to a preparation method for an anti-ultraviolet polyacrylonitrile nanofiber membrane. The preparation method comprises the following steps of: (1) preparing a polyacrylonitrile spinning solution, and performing electrostatic spinning to obtain the polyacrylonitrile nanofiber membrane; (2) preparing a graphene oxide spreading solution; spreading the graphene oxide spreading solution on a water surface to obtain single-molecular-layer graphene oxide; and performing compression obstacle-slip to obtain a graphene oxide film; (3) utilizing a LB technology, and transferring the graphene oxide film on a water surface onto the polyacrylonitrile nanofiber membrane through a membrane drawing machine; and (4) preparing the anti-ultraviolet polyacrylonitrile nanofiber membrane through the LB technology. The preparation method is simple to operate, is gentle in reaction condition, is non-poisonous and pollution-free, can be widely applied to the fields such as biological medicines, environmental friendliness and cosmetics, and has a very good practical value and potential value.

Description

technical field [0001] The invention belongs to the field of preparation of functional materials, in particular to a preparation method of an anti-ultraviolet polyacrylonitrile nanofiber film. Background technique [0002] For people in outdoor activities, clothing is the main barrier to prevent excessive ultraviolet radiation, but the ability of conventional fabrics to block ultraviolet rays is not enough. Since the early nineties of the 20th century, foreign countries have carried out research on the function of textiles to shield ultraviolet rays, and many anti-ultraviolet fibers and fabrics have been developed and listed one after another; in recent years, there have been some domestic research reports on the development of such fibers and fabrics. [0003] The material that "changes the 21st century" - graphene, because of its huge specific surface area, excellent thermal conductivity, electrical conductivity and mechanical properties, can be combined with polymers, ino...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01
CPCB29D7/01
Inventor 聂华丽杨慧琴陈德强
Owner DONGHUA UNIV
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