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Transparent flame-retardant polyvinyl alcohol film and preparation method thereof

A technology of polyvinyl alcohol film and polyvinyl alcohol, which is applied in the manufacture of fire-resistant and flame-retardant filaments, single-component synthetic polymer rayon, filament/thread molding, etc., which can solve the problem of transparency and/or mechanical property degradation, etc. problem, to achieve the effect of good interface bonding strength

Active Publication Date: 2021-03-23
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: under the premise of ensuring the flame retardancy of the PVA film, its transparency and / or mechanical properties will be significantly reduced

Method used

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  • Transparent flame-retardant polyvinyl alcohol film and preparation method thereof
  • Transparent flame-retardant polyvinyl alcohol film and preparation method thereof
  • Transparent flame-retardant polyvinyl alcohol film and preparation method thereof

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preparation example Construction

[0038] Such as figure 1 As shown, according to the first aspect of the present invention, the embodiment of the present invention provides a method for preparing a transparent flame-retardant PVA film, comprising the following steps:

[0039] (1) Use the mixed aqueous solution of PVA and CEP, or the mixed aqueous solution of PVA, CEP and AlHP nanoparticles as the spinning solution, spin on the conductive substrate, and use the surface of the conductive substrate as the X-Y axis plane to make the spinning fiber along the The X-Y axis plane is arranged into a network, and then solidified and cross-linked in the range of 80-100 ° C to obtain nanofibers arranged on the surface of the conductive substrate, wherein the solid content of the spinning solution is 10 wt%, CEP and The mass of AlHP nanoparticles is 1%-15% and 0-15% of PVA respectively;

[0040] (2) Use the mixed aqueous solution of PVA and CEP as pouring liquid, cast on the conductive substrate covered with nanofibers ob...

Embodiment 1

[0074] (1) 47.5g mass concentration 10% PVA transparent aqueous solution, after adding 0.05g CEP, 2g 10%AlHP dispersion, after mechanical stirring 30 minutes, 700W ultrasonic dispersion 60 minutes, obtain the spinning solution of AlHP / CEP / PVA.

[0075] Electrospinning the above spinning solution, the conditions of electrospinning are: No. 6 needle (inner diameter 0.6mm) spinning voltage is 18KV, injection speed is 0.5ml / h The distance between the needle tip and the conductive glass of the receiving device is 13cm, so as to conduct electricity The glass surface is used as the X-Y axis plane, so that the spun fibers are arranged into a network along the X-Y axis plane, and then the conductive glass covered with the spinning solution is placed in a vacuum drying oven at 100°C for curing and cross-linking for 2 hours to obtain AlHP / CEP with a diameter of 200-300nm / PVA nanofibers.

[0076] (2) Add 4.75g CEP to 902.5g of 10% PVA transparent aqueous solution in mass concentration, a...

Embodiment 2

[0078] (1) 90g mass concentration 10% PVA transparent aqueous solution, after adding 0.5g CEP, 5g 10wt%AlHP dispersion, after mechanical stirring 30 minutes, 700W ultrasonic dispersion 60 minutes, obtain the spinning solution of AlHP / CEP / PVA.

[0079] Electrospinning the above spinning solution, the conditions of electrospinning are: No. 6 needle (inner diameter 0.6mm) spinning voltage is 18KV, injection speed is 0.5ml / h The distance between the needle tip and the conductive glass of the receiving device is 13cm, so as to conduct electricity The glass surface is used as the X-Y axis plane, so that the spun fibers are arranged into a network along the X-Y axis plane, and then the conductive glass covered with the spinning solution is placed in a vacuum drying oven at 100°C for curing and cross-linking for 2 hours to obtain AlHP / CEP with a diameter of 200-300nm / PVA nanofibers.

[0080] (2) Add 9 g of CEP to 810 g of a transparent aqueous solution of PVA with a mass concentratio...

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Abstract

The invention provides a transparent flame-retardant PVA film and a preparation method thereof, wherein the transparent flame-retardant PVA film has good transparency and good mechanical property under the premise of the ensuring of the flame retardancy of the PVA film. The preparation method comprises: (1) spinning at an electric-conduction substrate by using a mixed aqueous solution of PVA and methyl propionic acid phosphinic acid or a mixed aqueous solution of PVA, methyl propionic acid phosphinic acid and aluminum hypophosphite nanoparticles as a spinning liquid, arranging the spinning fibers into a network along an X-Y axis plane by using the surface of the electric-conduction substrate as the X-Y axis plane, and carrying out curing cross-linking within a range of 80-100 DEG C to obtain nano-fibers arranged on the surface of the electric-conduction substrate; and (2) casting the electric-conduction substrate prepared in the step (1) and covered with the nano-fibers by using a mixed aqueous solution of PVA and methyl propionic acid phosphinic acid as a casting liquid, and carrying out casting film forming to obtain the transparent flame-retardant PVA film.

Description

technical field [0001] The invention relates to a transparent flame-retardant polyvinyl alcohol film and a preparation method thereof. Background technique [0002] As people's research on composite materials continues to deepen, transparent polymers have shown important application value in the frontier fields of today's material research, such as organic light-emitting diodes, flexible solar cells, wearable smart devices, and aerospace. Polyvinyl alcohol (PVA) is one of the most widely used polymer materials at present. It has excellent light transmission, film-forming properties, gas barrier properties and biodegradability, making it have a good application prospect in electronic materials. . However, PVA material is extremely flammable and has a low oxygen index, which seriously affects its application in the above-mentioned fields. [0003] There are two ways to flame-retardant transparent PVA, one is to add reactive flame retardants, or inert inorganic nanoparticles....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08K5/5313C08K3/32C08J5/18D01F6/50D01F1/07D01D5/00
CPCC08J5/18C08J2329/04C08J2429/04C08K3/32C08K5/5313C08K2201/011D01D5/003D01F1/07D01F6/50
Inventor 刘学清刘继延邹立勇刘志宏高淑玉尤庆亮陈佳肖标
Owner JIANGHAN UNIVERSITY
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