Study on Mechanical Properties and Fracture Mechanisms of Lignin Fiber/epoxy Resin Composites
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Published:2023-04-05
Issue:1
Volume:60
Page:13-24
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ISSN:0025-5289
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Container-title:Materiale Plastice
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language:en
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Short-container-title:Mater. Plast.
Author:
Zhe Wu,Qingnan Wang,Shuai Zhao,Yang Zhang,Bo Xue
Abstract
Lignin fiber/epoxy resin compositeused for energy absorbing was prepared by atmospheric stirring method. Quasi-static compressive mechanics tests were implemented by using the electronic universal mechanics tester (WDW-100KN) under ambient conditions to analyze the compressing behavior of the matrix material and composite at the strain rate of 10-2s-1 .Scanning electron microscope (SEM) was used to observe the microstructure of the composite after quasi-static compression damage. The results showed that when the ratio of epoxy resin and curing agent was 3:1, the internal structure of the matrix material was more uniform with smoother cross-section, which represented better mechanical properties. It was found that the addition of lignin fiber changed the compression characteristics of the matrix material, resulting in a strengthening stage appeared. At the same time, when the lignin fiber content was 2% or 3%, the composite could absorb more impact energy and delay crack generation, which met the performance requirement of energy absorbing materials.
Publisher
Revista de Chimie SRL
Subject
Materials Chemistry,Polymers and Plastics,Mechanics of Materials,General Chemistry