A kind of nontoxic and harmless high mechanical strength high elasticity hemicellulose foam composite material and its preparation method

A technology of hemicellulose and mechanical strength, which is applied in the field of non-toxic, harmless, high-strength and high-elasticity hemicellulose foam composite material and its preparation, and achieves the effects of wide application prospect, easy control of reaction conditions and simple operation.

Active Publication Date: 2022-03-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the lack of mechanical properties and resilience of current hemicellulose foam composite materials and considering environmental protection issues, the present invention provides a non-toxic, harmless, high mechanical strength and high elasticity hemicellulose foam composite material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a hemicellulose foam composite material with high mechanical strength and high elasticity, which is nontoxic and harmless, comprising the following steps:

[0029] (1) Add 1.0 g of xylan hemicellulose and 10 g of sodium trimetaphosphate into deionized water, stir and dissolve at 90°C for 3 hours to obtain a mixed solution with a concentration of xylan hemicellulose of 1 wt %;

[0030] (2) Add 5.0g of polyvinyl alcohol into 20g of deionized water, stir and dissolve at 90°C for 1 hour to obtain a polyvinyl alcohol solution;

[0031] (3) Mix the mixed solution in step (1) with the polyvinyl alcohol solution in step (2), stir for 50s at a stirring rate of 500r / min, pour the obtained cross-linked product into a mold, cool and form it, and obtain a foam composite material, use Wash the surface of the foam composite material 5 times with deionized water, and dry it at room temperature for 5 days to obtain the non-toxic, harmless, high mechanical strength...

Embodiment 2

[0035] The preparation of a nontoxic, harmless, high mechanical strength and high elasticity hemicellulose foam composite material comprises the following steps:

[0036] (1) Add 2.0 g of xylan hemicellulose and 10 g of sodium trimetaphosphate into deionized water, stir and dissolve at 80° C. for 4 hours, and obtain a mixed solution with a concentration of xylan hemicellulose of 2 wt %;

[0037] (2) Add 5.0g polyvinyl alcohol into 28.5g deionized water, stir and dissolve at 80°C for 1.5h to obtain a polyvinyl alcohol solution;

[0038] (3) Mix the mixed solution in step (1) with the polyvinyl alcohol solution in step (2) and stir for 40 seconds at a stirring rate of 600 r / min. Pour the obtained cross-linked product into a mold, cool and form it to obtain a foam composite material, and use The surface of the foam composite material was washed with deionized water for 4 times, and after drying at room temperature for 4 days, the non-toxic, harmless, high mechanical strength and ...

Embodiment 3

[0042] The preparation of a nontoxic, harmless, high mechanical strength and high elasticity hemicellulose foam composite material comprises the following steps:

[0043] (1) Add 3.0 g of xylan hemicellulose and 10 g of sodium trimetaphosphate into deionized water, stir and dissolve at 70°C for 5 hours to obtain a mixed solution with a concentration of xylan hemicellulose of 3 wt %;

[0044] (2) Add 5.0g of polyvinyl alcohol into 45g of deionized water, stir and dissolve at 70°C for 2 hours to obtain a polyvinyl alcohol solution;

[0045] (3) Mix the mixed solution in step (1) with the polyvinyl alcohol solution in step (2) and stir for 30 seconds at a stirring rate of 700 r / min. Pour the obtained cross-linked product into a mold, cool and form it to obtain a foam composite material, and use The surface of the foam composite material was washed with deionized water for 3 times, and after drying at room temperature for 3 days, the non-toxic and harmless hemicellulose foam compo...

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Abstract

The invention discloses a non-toxic, harmless, high-mechanical-strength, high-elasticity hemicellulose foam composite material and a preparation method thereof. The method comprises the following steps: (1) adding hemicellulose and cross-linking agent into deionized water, heating and stirring until dissolved to obtain a mixed solution; (2) dissolving PVA in water, heating and stirring to dissolve to obtain a PVA solution; (3) adding The mixed solution is mixed and stirred with the PVA solution to obtain a cross-linked product, which is cooled and molded, washed and dried to obtain the non-toxic, harmless, high-mechanical-strength, and highly elastic hemicellulose foam composite material. The foam composite material is easy to process, non-toxic and harmless, has high mechanical strength and high elasticity, and has great application potential in the aspects of anti-shock and compression materials, elastic response materials, soft tissue engineering materials and biomedical materials.

Description

technical field [0001] The invention belongs to the technical field of biomass materials, and in particular relates to a non-toxic, harmless, high-strength and high-elasticity hemicellulose foam composite material and a preparation method thereof. Background technique [0002] Foam is a man-made, low-density, highly porous material. They offer some superior physical properties compared to their bulkier counterparts, such as large specific surface area, high impact energy absorption, and excellent strength-to-weight ratio. Depending on their properties, foams can be used in absorbent materials, packaging applications and soft tissue engineering. [0003] Due to the increasingly prominent environmental problems and the easy availability of xylan in downstream products, xylan has attracted more and more attention from researchers. In addition, xylan has a wide range of sources, abundant reserves, and its renewable, tunable functionality, and biocompatibility, making xylan a w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L5/14C08J9/28C08J3/24C08K3/32
CPCC08J9/286C08J9/0061C08J9/0066C08J3/246C08J2329/04C08J2405/14C08J2305/14C08J2429/14C08K3/32C08J2201/0504
Inventor 宋涛罗元超熊海平戢辉岑钰陈功
Owner SOUTH CHINA UNIV OF TECH
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