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Uvioresistant polyving alcohol-xylan composite membrane as well as preparation method and application thereof

A technology of polyvinyl alcohol and xylan, applied in the field of agricultural waste utilization and food packaging materials, to achieve the effects of improved mechanical properties, easy access, and good UV shielding effect

Inactive Publication Date: 2014-12-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no literature has reported polyvinyl alcohol-xylan composite films with UV shielding function and good hydrophobic properties.

Method used

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  • Uvioresistant polyving alcohol-xylan composite membrane as well as preparation method and application thereof
  • Uvioresistant polyving alcohol-xylan composite membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of anti-ultraviolet polyvinyl alcohol-xylan composite film, its preparation method is as follows:

[0049] (1) Weigh 3g of polyvinyl alcohol with a molecular weight of 179687g / mol and 1g of xylan with a molecular weight of 131463g / mol, add them to 200mL of 95°C hot water for 1 hour, then add 0.4g of glycerin, and mix well solution;

[0050] (2) Continue to stir the mixed solution for 1 h, then add 0.08 g of rutile titanium dioxide, and place it in a 90W ultrasonic instrument for ultrasonication for 1 h to obtain a composite film-making solution;

[0051] (3) Pour the composite film-making solution into a horizontally placed polytetrafluoroethylene plate for casting, then put it in a blast drying oven at 40°C for 12 hours, and then place it in a constant temperature and constant temperature at 23°C and a relative humidity of 50%. After 48 hours in a wet chamber, the anti-ultraviolet polyvinyl alcohol-xylan composite film was obtained.

Embodiment 2

[0054] A kind of anti-ultraviolet polyvinyl alcohol-xylan composite film, its preparation method is as follows:

[0055] (1) Weigh 3g of polyvinyl alcohol with a molecular weight of 179687g / mol and 1g of xylan with a molecular weight of 131463g / mol, add them to 200mL of 100°C hot water for 1 hour, then add 0.32g of glycerin, and mix well solution;

[0056] (2) Continue stirring the mixed solution for 2 hours, then add 0.16 g of anatase titanium dioxide, and place it in a 100W ultrasonic instrument for 1.5 hours to obtain a composite film-forming solution;

[0057] (3) Pour the composite film-making solution into a horizontally placed polytetrafluoroethylene plate for casting, then put it in a blast drying oven at 45°C for 24 hours, and then place it in a constant temperature and constant temperature at 23°C and a relative humidity of 50%. After 48 hours in a wet chamber, the anti-ultraviolet polyvinyl alcohol-xylan composite film was obtained.

[0058] The properties of the ...

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Abstract

The invention belongs to the field of agriculture waste utilization and food packaging materials, and discloses an uvioresistant polyving alcohol-xylan composite membrane as well as a preparation method and application thereof. The preparation method of the uvioresistant polyving alcohol-xylan composite membrane comprises the following steps: (1) adding polyving alcohol and xylan into water, dissolving at high temperature, further adding glycerinum, and uniformly mixing, thereby obtaining a mixed solution; (2) continuously stirring the mixed solution obtained in the step (1), further adding titanium dioxide, and performing ultrasonic dispersion, thereby obtaining a composite membrane preparation solution; (3) putting the composite membrane preparation solution obtained in the step (2) into a horizontally arranged polyfluortetraethylene plate for curtain coating, and drying in an oven, thereby obtaining the uvioresistant polyving alcohol-xylan composite membrane. The uvioresistant polyving alcohol-xylan composite membrane is good in ultraviolet blocking property, mechanical property and hydrophobicity, and can be applied to the fields such as package material preparation or sunshade thermal-insulating material preparation.

Description

technical field [0001] The invention belongs to the fields of agricultural waste utilization and food packaging materials, and relates to a polyvinyl alcohol-xylan composite film, in particular to an anti-ultraviolet polyvinyl alcohol-xylan film with good ultraviolet shielding, mechanical properties and hydrophobicity Composite film and its preparation method and application. Background technique [0002] With the "white pollution" caused by non-degradable waste plastics becoming more and more serious, since the 1970s, various countries have carried out the development of biodegradable plastics. Agricultural and forestry biomass resources will play an important role in industrial development and environmental pollution because of their environmental friendliness, abundant reserves, and low cost. Agricultural and forestry biomass is mainly composed of cellulose, hemicellulose and lignin, and the content of hemicellulose is second only to that of cellulose. About 6 billion t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L5/00C08K3/22C08J5/18
Inventor 任俊莉孔维庆孙润仓王帅阳高存殿陈晓枫
Owner SOUTH CHINA UNIV OF TECH
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