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Preparation method of modified polyvinyl alcohol/thermoplastic resin composite material

A technology of polyvinyl alcohol resin and thermoplastic resin, which is applied in the field of materials and can solve problems such as poor strength and poor water resistance

Active Publication Date: 2022-07-29
佛山清粤新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, in order to solve the problems of poor water resistance and poor strength of polyvinyl alcohol resin / conventional thermoplastic resin composite materials obtained by conventional preparation methods, the present invention provides a method for preparing modified polyvinyl alcohol / thermoplastic resin composite materials, specifically The technical solution is as follows:

Method used

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  • Preparation method of modified polyvinyl alcohol/thermoplastic resin composite material
  • Preparation method of modified polyvinyl alcohol/thermoplastic resin composite material
  • Preparation method of modified polyvinyl alcohol/thermoplastic resin composite material

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preparation example Construction

[0025] In an embodiment of the present invention, a method for preparing a modified polyvinyl alcohol / thermoplastic resin composite material comprises the following steps:

[0026] By weight, add 10-80 parts of polyvinyl alcohol resin into 100-800 parts of dimethyl sulfoxide, place it in a constant temperature water bath at 45-55°C, stir evenly, and dissolve to obtain a polyvinyl alcohol resin solution, which is added dropwise. 1-10 parts of concentrated sulfuric acid, add 1-70 parts of fatty alcohol, react for 1-4 hours, then filter under reduced pressure, pour the filtrate into 400-800 parts of acetone, let stand, the product is precipitated, washed, filtered, and dried to constant weight , to obtain etherified polyvinyl alcohol resin;

[0027] In parts by weight, add 10-80 parts of etherified polyvinyl alcohol resin into 100-800 parts of deionized water to dissolve or swell for 2-5 hours, at a constant temperature of 90-95 ℃, add 1-10 parts of concentrated sulfuric acid dro...

Embodiment 1

[0057] In parts by weight, 50 parts of PVA1788 were added to 400 parts of dimethyl sulfoxide, stirred in a constant temperature water bath at 50°C, and dissolved to obtain a polyvinyl alcohol resin solution, 2 parts of concentrated sulfuric acid was added dropwise, 30 parts of n-butanol were added, and the reaction was carried out for 3 hours. . Filtration under reduced pressure, pouring the filtrate into 400 parts of acetone, standing, the product was precipitated, washed, filtered, dried to constant weight, and the polyvinyl alcohol resin was etherified.

[0058] In parts by weight, 50 parts of etherified polyvinyl alcohol resin was added to 500 parts of deionized water to swell for 3 hours. At a constant temperature of 92 °C, 1 part of concentrated sulfuric acid was added dropwise, and 30 parts of 1H, 1H, 2H, 2H-perfluorodecyltrimethyl were added. Oxysilane was stirred for 4 hours under nitrogen, filtered under reduced pressure, the filtrate was poured into 400 parts of abs...

Embodiment 2

[0063] In parts by weight, 50 parts of PVA1788 were added to 400 parts of dimethyl sulfoxide, stirred in a constant temperature water bath at 50°C, and dissolved to obtain a polyvinyl alcohol resin solution, 2 parts of concentrated sulfuric acid was added dropwise, 30 parts of n-butanol were added, and the reaction was carried out for 3 hours. . Filtration under reduced pressure, pouring the filtrate into 400 parts of acetone, standing, the product was precipitated, washed, filtered, and dried to constant weight to obtain etherified polyvinyl alcohol resin.

[0064] In parts by weight, 50 parts of etherified polyvinyl alcohol resin was added to 500 parts of deionized water to swell for 3 hours, and at a constant temperature of 92 °C, 1 part of concentrated sulfuric acid was added dropwise, 30 parts of 3-isocyanatopropyltrimethoxysilane was added, and nitrogen was purged. The reaction was stirred for 4h. Filtration under reduced pressure, pouring the filtrate into 400 parts of...

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Abstract

The invention discloses a preparation method of a modified polyvinyl alcohol / thermoplastic resin composite material, which comprises the following steps: adding 10-80 parts by weight of polyvinyl alcohol resin into 100-800 parts by weight of dimethyl sulfoxide, placing in a constant-temperature water bath at 45-55 DEG C, uniformly stirring, dissolving to obtain a polyvinyl alcohol resin solution, dropwise adding 1-10 parts by weight of concentrated sulfuric acid, adding 1-70 parts by weight of fatty alcohol, reacting for 1-4 hours, and filtering to obtain the modified polyvinyl alcohol / thermoplastic resin composite material. Filtering under reduced pressure, pouring filtrate into 400-800 parts of acetone, standing, separating out a product, washing, filtering and drying to constant weight to obtain etherified polyvinyl alcohol resin; silanizing the etherified polyvinyl alcohol resin to obtain silanized polyvinyl alcohol resin; and preparing the modified polyvinyl alcohol / thermoplastic resin composite material from the silanized polyvinyl alcohol resin and thermoplastic resin. The modified polyvinyl alcohol / thermoplastic resin composite material prepared by the method is excellent in water resistance and strength.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method of a modified polyvinyl alcohol / thermoplastic resin composite material. Background technique [0002] Polyvinyl alcohol resin has environmentally friendly properties and is recognized as a green degradable material with good performance such as good gas barrier properties, antistatic, chemical stability, acid and alkali resistance, organic solvent resistance, and excellent film-forming properties. biosecurity, etc. However, the polyvinyl alcohol resin structure contains a large number of hydroxyl structures, which makes the polyvinyl alcohol resin have poor water resistance, and the hydroxyl groups form strong intermolecular hydrogen bonds, which increases the difficulty of thermoplastic processability. Large compatibility is poor. Because the polyvinyl alcohol resin structure contains a large number of hydrophilic hydroxyl groups, the resulting film has poor water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L27/16C08L67/04C08L67/02C08L23/06C08J5/18
CPCC08J5/18C08J2329/04C08J2367/02C08J2429/04C08J2427/16C08J2467/04C08J2423/06Y02W90/10
Inventor 贾芳圣桂金黄鹏飞谢兴宇
Owner 佛山清粤新材料科技有限公司
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