Preparation method of peanut shell lignin-based degradable composite material

Peanut shell lignin-based biodegradable composite materials were prepared by melt blending in an internal mixer, which solved the problems of high material cost and low utilization rate of agricultural waste in the existing technology, and achieved the preparation of composite materials with excellent mechanical properties and hydrophobic properties.

CN121136375APending Publication Date: 2025-12-16TIANJIN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202511463261.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-14
Publication Date
2025-12-16

AI Technical Summary

Technical Problem

Existing single biodegradable plastic materials are insufficient to meet diverse market demands, are expensive, and difficult to promote. Furthermore, they have low utilization rates for agricultural waste. Therefore, it is necessary to develop environmentally friendly biodegradable composite materials to reduce costs and improve comprehensive utilization.

Method used

Peanut shell lignin-based biodegradable composite materials were prepared by internal mixer melt blending. Polycaprolactone, polybutylene adipate/terephthalate and peanut shell lignin powder were blended in an internal mixer and then hot-pressed to prepare composite materials with uniform mechanical properties.

Benefits of technology

This reduces the cost of biodegradable composite materials, increases the utilization rate of peanut shell agricultural waste, and produces composite materials with excellent mechanical and hydrophobic properties.

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Abstract

The invention provides a preparation method of a peanut shell lignin-based degradable composite material, which comprises the following steps: putting powdery polycaprolactone (PCL), powdery poly (butylene adipate / terephthalate) (PBAT) and powdery peanut shell lignin into an internal mixer for melt blending, taking out, shearing a blending product into fine particles while the blending product is hot, and carrying out extrusion molding to obtain the peanut shell lignin-based degradable composite material. Then putting the particles into a hot-pressing mold, putting the hot-pressing mold into a press vulcanizer for hot pressing, cooling and taking out to obtain the degradable composite material. The method has the characteristics of simple process, short time consumption and high raw material utilization rate. Compared with an industrial lignin-based degradable composite material, the prepared peanut shell lignin-based degradable composite material shows more excellent mechanical properties, the preparation cost of the degradable composite material is effectively reduced, and meanwhile high-valued comprehensive utilization of peanut shell agricultural waste is achieved.
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