A kind of bio-based composite material containing lignin and its preparation method

A composite material and lignin technology, which is applied in the field of lignin-containing bio-based composite materials and its preparation, can solve the impact of lignin composite materials on properties such as strength and rigidity, the dispersion and compatibility between matrices are not outstanding, and the common To solve the problems such as the influence of the biodegradation performance of the mixed composition, to achieve good anti-ultraviolet radiation performance, improve thermal stability, and excellent mechanical properties

Active Publication Date: 2021-05-07
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the poor interface between polyamide resin and lignin, the dispersion and compatibility between the matrix are not outstanding, and the addition of a large amount of polyamide will also greatly affect the strength and rigidity of lignin composites.
In addition, the addition of a large amount of conventional polyamide resin will also affect the biodegradability of the blend composition, which greatly reduces the environmental performance of the lignin composite material.

Method used

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  • A kind of bio-based composite material containing lignin and its preparation method
  • A kind of bio-based composite material containing lignin and its preparation method
  • A kind of bio-based composite material containing lignin and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Preparation method of bio-based composite material containing lignin

[0081] (1) 50 parts by weight of unmodified lignin (not modified by chemical groups of lignin) and 50 parts by weight of the polyamide prepared in Comparative Example 1 were dried in a vacuum oven at 60°C for 8h, and set aside ;

[0082] (2) Mix the dried lignin and polyamide in step (1), add them into an internal mixer, and blend them for 10 minutes at 100°C and a speed of 100r / min;

[0083] (3) Put the mixture kneaded in step (2) in a vacuum tablet press, and press it at 150° C. to obtain a bio-based composite material containing lignin.

Embodiment 2

[0085] Preparation method of bio-based composite material containing lignin

[0086] (1) 60 parts by weight of unmodified lignin and 40 parts by weight of the polyamide prepared in Comparative Example 1 were dried in a vacuum oven at 60°C for 8 hours, and set aside;

[0087] (2) Mix the dried lignin and polyamide in step (1), add them into an internal mixer, and blend them for 10 minutes at 100°C and a speed of 100r / min;

[0088] (3) Put the mixture kneaded in step (2) in a vacuum tablet press, and press it at 150° C. to obtain a bio-based composite material containing lignin.

Embodiment 3

[0090] Preparation method of bio-based composite material containing lignin

[0091] (1) 70 parts by weight of unmodified lignin and 30 parts by weight of the polyamide prepared in Comparative Example 1 were dried in a vacuum oven at 60°C for 8 hours, and set aside;

[0092] (2) Mix the dried lignin and polyamide in step (1), add them into an internal mixer, and blend them for 10 minutes at 100°C and a speed of 100r / min;

[0093] (3) Put the mixture kneaded in step (2) in a vacuum tablet press, and press it at 150° C. to obtain a bio-based composite material containing lignin.

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Abstract

The invention discloses a bio-based composite material containing lignin, relates to the technical field of polymer materials, and is mainly made of the following raw materials in parts by weight: 50-80 parts of lignin, 20-50 parts of polyamide, the polyamide The general structural formula of is as follows: where 5≤n≤5000, R 1 and R 3 is the aliphatic main chain structure, R 2 is a side chain structure with an ester functional group, R 4 It is a main chain structure with thioether; the invention also provides a preparation method of the above-mentioned composite material. The beneficial effect of the present invention is that: the bio-based composite material containing lignin prepared by the present invention still has good toughness after having 80% lignin content, which greatly improves the utilization rate and application field of lignin, and the material has extremely Good UV resistance has great industrialization prospects and commercial value.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a bio-based composite material containing lignin and a preparation method thereof. Background technique [0002] Lignin, the second most abundant natural polymer on earth, widely exists in the cell walls of plants and has been considered as a promising resource to replace existing fossil fuels. Lignin's low cost, abundant content, environmental friendliness, and good UV radiation resistance make lignin have many potential applications, such as adhesives, sunscreen creams, carbon fibers, fillers, bio-derived synthetic polymers, and composite materials. [0003] The value-added application of lignin materials has broad prospects, but there are performance defects of poor toughness. Lignin is an amorphous thermoplastic material with high glass transition temperature and free radical self-adaptation at high temperature, which limits its thermal stability. In addition, lign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/00C08L77/06C08G69/42
CPCC08L97/005C08L77/06C08G69/42C08L2201/08C08L2201/12C08G2230/00
Inventor 章亚琼陈佳伟汪钟凯吴茫邢明欣孔维铭
Owner ANHUI AGRICULTURAL UNIVERSITY
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