A lignocellulose-based epoxy resin, its preparation method and application

By preparing lignocellulose-based epoxy resin, the problem of difficult recycling of wind turbine blade composite materials has been solved, realizing the efficient utilization of biomass resources and biodegradable wind turbine blade materials, and promoting the development of green and recyclable wind power.

CN122080362APending Publication Date: 2026-05-26DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Filing Date
2024-11-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing technology for recycling composite materials for wind turbine blades is difficult and costly. They cannot be naturally degraded, the fiber materials are difficult to separate and reuse, and biomass resources are not effectively utilized.

Method used

A method for preparing lignocellulose-based epoxy resin was adopted, in which lignocellulose in agricultural and forestry waste was reacted with sodium hydroxide, epichlorohydrin and other substances to form epoxidized lignocellulose, which was then combined with bisphenol A epoxy resin and diaminodiphenylmethane curing agent to prepare biodegradable wind turbine blade material.

Benefits of technology

This has enabled the efficient utilization of biomass resources, produced biodegradable wind turbine blade materials, reduced recycling costs, and facilitated green and recyclable wind power development.

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Abstract

This application discloses a lignocellulose-based epoxy resin, its preparation method, and its application. The process includes the following steps: (1) mixing oven-dried lignocellulose raw material with sodium hydroxide, epichlorohydrin, water, and acetone, stirring, reaction I, adding 0.1M hydrochloric acid to quench the reaction, vacuum filtering, and separation to obtain brown epoxidized lignocellulose; (2) mixing the epoxidized lignocellulose with a diluent and bisphenol A epoxy resin, stirring, and reaction II to obtain resin raw material; (3) mixing diaminodiphenylmethane and pigment, stirring, and reaction III to obtain a curing agent; (4) mixing the resin raw material with the curing agent, stirring, and reaction IV, cooling to room temperature, stopping the reaction, and vacuum distilling at 50℃~70℃ to obtain the lignocellulose-based epoxy resin.
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