The compressive properties of flax fiber reinforced biobased materials

RAN Huijun; HUANG Bohua; YANG Gengchao; WANG Zhuolin; LI Mingyang; YAO Qinghe

doi:10.13471/j.cnki.acta.snus.ZR20240055

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The compressive properties of flax fiber reinforced biobased materials

Research articles | 更新时间：2024-11-07

- The compressive properties of flax fiber reinforced biobased materials
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 63, Issue 5, Pages: 140-147(2024)
- 作者机构：
  
  中山大学航空航天学院，广东深圳 518107
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.ZR20240055
  CLC： TB332
- Published：25 September 2024，
  
  Published Online：12 July 2024，
  
  Received：21 February 2024，
  
  Accepted：07 April 2024
- 稿件说明：
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冉慧俊,黄泊桦,杨耿超等.亚麻纤维增强生物基材料的压缩特性[J].中山大学学报(自然科学版)(中英文),2024,63(05):140-147.

RAN Huijun,HUANG Bohua,YANG Gengchao,et al.The compressive properties of flax fiber reinforced biobased materials[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2024,63(05):140-147.
冉慧俊,黄泊桦,杨耿超等.亚麻纤维增强生物基材料的压缩特性[J].中山大学学报(自然科学版)(中英文),2024,63(05):140-147. DOI： 10.13471/j.cnki.acta.snus.ZR20240055.

RAN Huijun,HUANG Bohua,YANG Gengchao,et al.The compressive properties of flax fiber reinforced biobased materials[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2024,63(05):140-147. DOI： 10.13471/j.cnki.acta.snus.ZR20240055.

摘要

通过在聚乳酸（PLA）生物基材料中添加亚麻纤维来增强其压缩性能，并探讨硅烷偶联剂浓度和亚麻纤维质量分数对PLA/Flax复合材料压缩力学性能的影响。首先，利用扫描电镜（SEM）对经硅烷偶联剂处理的亚麻纤维进行微观结构分析。采用熔融共混、注射成型的方法，制备了不同配比的PLA/Flax复合材料样品。再通过100 kN万能试验机测定了各样品的弹性模量和屈服强度。最后，利用扫描电镜对复合材料的截面进行微观结构分析，揭示材料内部的纤维分布和界面特性。研究发现：当亚麻纤维含量为5.25%且经过2%硅烷偶联剂处理时，复合材料的弹性模量达到最大值0.63 GPa，比纯PLA材料提高了24.2%；屈服强度提升至124.7 MPa，增幅达到15.6%。且，浓度为2%硅烷偶联剂处理的亚麻纤维与聚乳酸具有更紧密的界面相容性。

Abstract

This study enhances the compressive performance of polylactic acid（PLA） bio-based materials by adding flax fibers， and explores the effects of silane coupling agent concentration and flax fiber mass fraction on the compressive mechanical properties of PLA/Flax composite materials. Firstly， scanning electron microscopy（SEM） was used to analyze the microstructure of flax fibers treated with silane coupling agents. PLA/Flax composite material samples with different ratios were prepared using melt blending and injection molding methods. The elastic modulus and yield strength of each sample were measured using a 100 kN universal testing machine. Finally， the microstructure of the cross-section of the composite material was analyzed using SEM， revealing the fiber distribution and interface characteristics inside the material. It was found that， when the flax fiber content is 5.25% and treated with a 2% silane coupling agent， the elastic modulus of the composite material reaches a maximum value of 0.63 GPa， which is 24.2% higher than that of pure PLA material. And the yield strength increased to 124.7 MPa， with an increase of 15.6%. At the same time，the flax fiber treated with a 2% silane coupling agent had a tighter interface compatibility with polylactic acid.

关键词

生物基复合材料亚麻纤维硅烷偶联剂压缩性能

Keywords

biobased compositeflax fibersilane coupling agentcompressive performance

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