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A non-toxic, harmless, high-strength, high-heat-resistant hemicellulose foam composite material and its preparation method

A hemicellulose, non-toxic and harmless technology, applied in the field of non-toxic, harmless, high-strength and high heat-resistant hemicellulose foam composite materials and its preparation, can solve the problem that foam composite materials are not suitable for human soft tissue engineering and limit human soft tissue Engineering development, poor mechanical strength and other problems, to achieve the effect of easy control of reaction conditions, great application potential and good heat resistance

Active Publication Date: 2022-03-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the cross-linking agents used in the reported foam composite materials are boric acid, glutaraldehyde, formaldehyde, etc. These cross-linking agents are poisonous and have certain harm to the human body, and the prepared foam composite materials are not suitable. for human soft tissue engineering
Furthermore, the poor mechanical strength of currently reported biofoam composites severely limits their development in human soft tissue engineering.
At present, there is no report on the method of preparing foam composites from xylan hemicellulose for soft tissue engineering

Method used

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  • A non-toxic, harmless, high-strength, high-heat-resistant hemicellulose foam composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of a non-toxic, harmless, high-strength, high-heat-resistant hemicellulose foam composite material (see attached figure 1 ), including the following steps:

[0031] (1) Add 1.0 g of xylan hemicellulose, 5 g of citric acid, and 10 g of sodium trimetaphosphate into deionized water, stir and dissolve at 90° C. for 5 hours, and obtain a mixed solution with a concentration of xylan hemicellulose of 1 wt %;

[0032] (2) Add 5.0 g of polyvinyl alcohol into deionized water, stir and dissolve at 90°C for 1 hour to obtain a polyvinyl alcohol solution;

[0033] (3) Mix the mixed solution of step (1) with the polyvinyl alcohol solution of step (2) and stir for 30s at a stirring rate of 700 r / min, pour the obtained cross-linked product into the mold, and wash the surface of the foam with deionized water after cooling and forming 5 times, after drying at room temperature for 5 days, a hemicellulose foam with high strength and high heat resistance was obtained.

[0034] ...

Embodiment 2

[0037] The preparation of a non-toxic, harmless, high-strength and high-heat-resistant hemicellulose foam composite material comprises the following steps:

[0038] (1) Add 2.0 g of xylan hemicellulose, 5 g of citric acid, 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 %;

[0039] (2) Add 5.0g polyvinyl alcohol into deionized water, stir and dissolve at 80°C for 1.5h to obtain a polyvinyl alcohol solution;

[0040] (3) Mix the mixed solution of step (1) with the polyvinyl alcohol solution of step (2) and stir for 30s at a stirring rate of 600 r / min, pour the obtained cross-linked product into the mold, and wash the surface of the foam with deionized water after cooling and forming 4 times, after drying at room temperature for 4 days, a hemicellulose foam with high strength and high heat resistance was obtained.

[0041] The obtained hemicellulose...

Embodiment 3

[0044] The preparation of a non-toxic, harmless, high-strength and high-heat-resistant hemicellulose foam composite material comprises the following steps:

[0045] (1) Add 3.0 g of xylan hemicellulose, 5 g of citric acid, and 10 g of sodium trimetaphosphate into deionized water, stir and dissolve at 70° C. for 3 hours, and obtain a mixed solution with a concentration of xylan hemicellulose of 3 wt %;

[0046] (2) Add 5.0 g of polyvinyl alcohol into deionized water, stir and dissolve at 70°C for 2 hours to obtain a polyvinyl alcohol solution;

[0047] (3) Mix the mixed solution of step (1) with the polyvinyl alcohol solution of step (2) and stir for 30s at a stirring rate of 500 r / min, pour the obtained cross-linked product into the mold, and wash the surface of the foam with deionized water after cooling and forming 3 times, after drying at room temperature for 3 days, a hemicellulose foam with high strength and high heat resistance was obtained.

[0048] The obtained hemice...

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Abstract

The invention discloses a nontoxic and harmless hemicellulose foam composite material and a preparation method thereof. The method comprises the following steps: (1) dissolving hemicellulose in water, heating and stirring until dissolved to obtain a hemicellulose solution, dissolving a crosslinking agent and citric acid in the hemicellulose solution to obtain a mixed solution; (2) dissolving PVA Dissolving in water, heating and stirring to dissolve to obtain a PVA solution; (3) mixing and stirring the mixed solution and the PVA solution to obtain a cross-linked product, cooling and forming, washing and drying to obtain the foam composite material. The foam composite material is easy to process, has excellent mechanical properties, good recovery, and high heat resistance, and has broad application prospects in functionalized materials based on foam porous materials, such as shock-resistant and compression-resistant materials. In addition, the foam material has no residue of toxic and harmful substances, so it also has great application potential in materials related to human health, such as 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, high-heat-resistant hemicellulose foam composite material and a preparation method thereof. Background technique [0002] Foam is a polymer with a three-dimensional polymer structure, which has a uniform interconnected high-porosity network structure, which is highly similar to the soft tissue in the human body, so it is reasonable and practical to apply to soft tissue engineering . Foam materials have also been found in tissue engineering, such as soft tissue growth, cartilage replacement, nucleus pulposus replacement, wound healing, bone regeneration, blood vessel replacement, etc., have great application prospects. [0003] Natural polymers and biocompatible synthetic polymers are currently the main biological raw materials used in the preparation of foams in soft tissue engineering. In recent years, with the increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L5/14C08K5/11C08K3/32C08J3/24C08J9/00
CPCC08J3/246C08J9/0061C08J2329/04C08J2405/14C08J2305/14C08J2429/04C08K5/11C08K3/32
Inventor 宋涛罗元超戢辉熊海平
Owner SOUTH CHINA UNIV OF TECH
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