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A kind of preparation method of polyvinyl alcohol-based composite material

A polyvinyl alcohol-based, composite material technology, applied in the field of composite material processing, can solve the problems of low decomposition temperature, improve service performance, difficult preparation of hollow containers, etc., and achieve the effects of excellent mechanical properties, guaranteed mechanical properties, and enhanced barrier properties.

Active Publication Date: 2022-02-15
安徽瑞鸿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

[0003] Polyvinyl alcohol is a crystalline polymer with a large number of hydroxyl groups in the molecule, which can form a large number of intramolecular and intermolecular hydrogen bonds, making its melting point as high as 220-240°C, but its decomposition temperature is low. It begins to dehydrate and etherify at 160°C. It starts to decompose at ℃, and it will decompose during the melting process. There is no thermoplastic processing window, and it is difficult to prepare hollow containers.
[0004] Patent CN201510392452.3 discloses a polyvinyl alcohol / shell powder biomass composite material and its preparation method. The composite material is made of polyvinyl alcohol, shell powder and a plasticizer through melt blending. The plasticizer is Polyhydric alcohol, aliphatic amide, aliphatic alcohol amine and low-molecular-weight polyethylene glycol, although the composite material made by its embodiment can reach 80MPa, elongation at break can reach 300%, but can not have higher simultaneously. Tensile strength and elongation at break, and did not test its barrier properties to non-polar solvents, and the shell powder used is directly washed shells, without any treatment to improve the performance of the shells

Method used

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  • A kind of preparation method of polyvinyl alcohol-based composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of polyvinyl alcohol-based composites:

[0038] (1) Microwave swelling: add 10 kg of polyvinyl alcohol to 40 kg of water, and use microwave reflux in a microwave reactor with a microwave frequency of 2450 MHz and a microwave power of 600 W for 10 minutes under stirring, and naturally cool to room temperature after the treatment to obtain a polyvinyl alcohol hydrogel;

[0039] (2) Shell flour milling: wash the shells with water to remove impurities, dry them at 80°C to constant weight, and then coarsely pulverize and finely pulverize them to make 120-mesh powder to obtain shell powder;

[0040] (3) Surface modification: heat 0.25 kg of triglycidyl isocyanurate to the melting point and keep it warm until it is completely melted, then add 1 kg of shell powder, continue to keep stirring at the melting point for 2 hours, and wait for the temperature to drop naturally after the modification When the temperature is below 45°C, it is crushed to make a 200-mesh powde...

Embodiment 2

[0043] Preparation of polyvinyl alcohol-based composites:

[0044] (1) Microwave swelling: add 10 kg of polyvinyl alcohol to 40 kg of water, and use microwave reflux in a microwave reactor with a microwave frequency of 2450 MHz and a microwave power of 600 W for 10 minutes under stirring, and naturally cool to room temperature after the treatment to obtain a polyvinyl alcohol hydrogel;

[0045] (2) Shell flour milling: wash the shells with water to remove impurities, dry them at 80°C to constant weight, and then coarsely pulverize and finely pulverize them to make 120-mesh powder to obtain shell powder;

[0046] (3) Surface modification: heat 0.2kg of triglycidyl isocyanurate to the melting point and keep it warm until it is completely melted, then add 1kg of shell powder, continue to keep stirring at the melting point for 2 hours, and wait for the temperature to drop naturally after the modification. When the temperature is below 45°C, it is crushed to make a 200-mesh powder,...

Embodiment 3

[0049] With embodiment 1 as contrast, the embodiment 3 that increases auxiliary agent is set, all the other are identical with embodiment 1.

[0050] Preparation of polyvinyl alcohol-based composites:

[0051] (1) Microwave swelling: add 10 kg of polyvinyl alcohol to 40 kg of water, and use microwave reflux in a microwave reactor with a microwave frequency of 2450 MHz and a microwave power of 600 W for 10 minutes under stirring, and naturally cool to room temperature after the treatment to obtain a polyvinyl alcohol hydrogel;

[0052] (2) Shell flour milling: wash the shells with water to remove impurities, dry them at 80°C to constant weight, and then coarsely pulverize and finely pulverize them to make 120-mesh powder to obtain shell powder;

[0053] (3) Surface modification: heat 0.25 kg of triglycidyl isocyanurate to the melting point and keep it warm until it is completely melted, then add 1 kg of shell powder, continue to keep stirring at the melting point for 2 hours, and...

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Abstract

The invention discloses a preparation method of a polyvinyl alcohol-based composite material, relates to the technical field of composite material processing, and comprises the following steps: (1) microwave swelling; (2) shell milling; (3) surface modification; (4) Extrusion granulation; the present invention prepares polyvinyl alcohol-based composite materials through microwave swelling treatment of polyvinyl alcohol and surface modification treatment of shell powder, which can be applied to the processing of various plastic products, such as films, Hollow containers, injection molding products, etc.; processed plastic products have excellent barrier properties while ensuring good mechanical properties.

Description

Technical field: [0001] The invention relates to the technical field of composite material processing, in particular to a preparation method of a polyvinyl alcohol-based composite material. Background technique: [0002] Polyvinyl alcohol is a polymer with excellent performance and wide application. The hollow container prepared from it has the advantages of good mechanical properties, excellent oxygen and oil resistance, no dust absorption, transparency, etc., and has water solubility under certain conditions. And biodegradability, occupy an important position in packaging materials such as non-polar solvents. [0003] Polyvinyl alcohol is a crystalline polymer with a large number of hydroxyl groups in the molecule, which can form a large number of intramolecular and intermolecular hydrogen bonds, making its melting point as high as 220-240°C, but its decomposition temperature is low. It begins to dehydrate and etherify at 160°C. It begins to decompose at ℃, and the decomp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L33/02C08K9/10C08K3/26C08K5/3492
CPCC08L29/04C08K9/10C08K3/26C08K5/34924C08K2003/265C08L33/02
Inventor 李汪洋吴磊胡伟李莉聂敏李怡俊刘鹏举刘梦茹
Owner 安徽瑞鸿新材料科技有限公司