中山大学航空航天学院,广东 深圳 518107
冉慧俊(1999年生),男;研究方向:注塑纤维转移机理;E-mail:ranhj@mail2.sysu.edu.cn
姚清河(1980年生),男;研究方向:计算流体力学;E-mail:yaoqhe@mail.sysu.edu.cn
纸质出版日期:2024-09-25,
网络出版日期:2024-07-12,
收稿日期:2024-02-21,
录用日期:2024-04-07
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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.
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。
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.
生物基复合材料亚麻纤维硅烷偶联剂压缩性能
biobased compositeflax fibersilane coupling agentcompressive performance
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