Esterified starch modified polybutylene succinate composite material, and preparation method and application thereof

By modifying starch and PBS through two-stage solid-phase ball milling esterification, the problems of poor compatibility and uneven dispersion in starch/PBS composite materials are solved, improving the mechanical and processing properties of the materials and making them suitable for applications such as biodegradable packaging materials.

CN122356743APending Publication Date: 2026-07-10BEIBU GULF UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIBU GULF UNIV
Filing Date
2026-05-18
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing starch/PBS composite materials suffer from poor compatibility between starch and PBS, weak interfacial bonding, uneven dispersion, and decreased mechanical properties.

Method used

Starch was modified by esterification using a two-stage solid-phase ball milling method. First, it was esterified by mixing with acid anhydride and catalyst. Then, it was pre-dispersed and activated by mixing with PBS. Finally, it was melt-blended to form an esterified starch-modified polybutylene succinate composite material.

Benefits of technology

It improves the interfacial compatibility and dispersion uniformity of starch and PBS, enhances the mechanical and processing properties of the composite material, and is suitable for biodegradable packaging films, agricultural mulch films, biodegradable shopping bags, disposable tableware and other fields.

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Abstract

This invention relates to the field of biodegradable polymer materials, specifically disclosing an esterified starch-modified polybutylene succinate composite material, its preparation method, and its applications. The preparation method includes: mixing starch, acid anhydride, and an acid catalyst, and performing an esterification reaction under solid-phase ball milling conditions to obtain esterified starch; mixing the esterified starch with polybutylene succinate and then performing a second solid-phase ball milling to obtain a pre-dispersed and activated mixture; and then melt-blending the pre-dispersed and activated mixture to obtain the esterified starch-modified polybutylene succinate composite material. This invention improves the interfacial compatibility and dispersion uniformity between starch and polybutylene succinate through the synergistic effect of solid-phase ball milling esterification and secondary solid-phase ball milling pre-dispersion, thereby enhancing the mechanical properties, processing adaptability, and environmental friendliness of the composite material.
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