Straw-based light stabilizer as well as preparation method and application thereof

By alkali treatment of straw powder and mixing it with melamine and boric acid, grafting reaction, a straw-based light stabilizer was prepared, which solved the problem of PBAT aging under light, achieved a high biosafety, stability and low-cost light stabilizer, and significantly improved the anti-ultraviolet aging performance of biodegradable polyesters.

CN119708533APending Publication Date: 2025-03-28JIANGSU ACAD OF AGRI SCI +1
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Patent Information

Application Number
CN202411777145.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

Existing biodegradable polyesters such as PBAT are prone to aging under light, resulting in reduced mechanical properties, and traditional synthetic light stabilizers have problems such as ecological toxicity, poor stability and high preparation costs.

Method used

The straw-based light stabilizer was prepared by mixing the straw powder with melamine and boric acid and grafting reaction. This method relaxes the physical and chemical structure of the straw through gentle alkaline solvent treatment, improves the reactive group reactivity of the cellulose surface, and thus improves the resistance to UV aging.

Benefits of technology

The prepared straw-based light stabilizer has good anti-UV aging performance, has UV shielding and absorption capabilities, and is biodegradable and environmentally friendly, and can show good dispersion and stability in biodegradable plastics.

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Abstract

The invention discloses a straw-based light stabilizer and a preparation method and application thereof, and the method comprises the following steps: dissolving straw powder in an alkali solution, carrying out alkali treatment to obtain alkali-treated straw powder, mixing a melamine solution, boric acid and the alkali-treated straw powder, carrying out reflux stirring, filtering while hot, washing, and freeze-drying to obtain the straw-based light stabilizer. The selected straws are derived from agricultural and forestry waste biomass resources, and chemical components do not need to be purified and separated; through mild alkaline solvent treatment, the physical and chemical structures of the straw are relaxed, subsequent boric acid and melamine molecules can more easily react with hydroxyl, carboxyl and other active groups on the surface of cellulose, and the ultraviolet aging resistance of the straw is improved; the straw-based green light stabilizer prepared by the preparation method disclosed by the invention has the advantages of biodegradability, environmental friendliness and better dispersity in biodegradable plastics; the light stabilizer has the ultraviolet shielding performance and the ultraviolet absorption capacity at the same time.
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