Waste-free processing method for modifying lignin in fibrous plant material and processing method for lignin-modified fibrous plant material

A waste-free process for modifying lignin in fibrous plant materials by in situ chemical infiltration and heating addresses the environmental and cost issues of conventional methods, resulting in stronger and more flexible materials with reduced waste.

JP2025114751APending Publication Date: 2025-08-05MARYLAND COLLEGE PARK UNIV OF
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Patent Information

Application Number
JP2025078625
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-08-27
Filing Date
2025-05-09
Publication Date
2025-08-05

AI Technical Summary

Technical Problem

Conventional lignin removal techniques in fibrous plant materials consume large amounts of chemicals and generate significant liquid waste, leading to high operating costs and environmental issues.

Method used

A waste-free process that infiltrates fibrous plant materials with chemicals to modify lignin in situ, using alkaline solutions to shorten polymer chains, which are then heated to soften the material, allowing for densification without generating substantial liquid waste.

Benefits of technology

The process produces lignin-modified fibrous materials with improved mechanical properties, such as increased strength and flexibility, while minimizing chemical use and waste production.

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Abstract

To provide a method for producing high-strength, flexible, or anisotropic elastic wood or bamboo.SOLUTION: In a method for producing high-strength, flexible, or anisotropic elastic wood and bamboo, a soft piece made of fibrous plant material having a modified lignin is impregnated with a chemical solution, and is subjected to a temperature of at least 80°C, or is then subjected to a drying process, so that the modified lignin content in the soft piece is at least 90% of the natural lignin content in the natural fibrous plant material. The modified lignin retained in the soft piece has shorter polymer chains than those of natural lignin.SELECTED DRAWING: Figure 1
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Citation Information

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