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通过用硅烷偶联剂改性金属加热元件提高电阻焊接GF/PP热塑性复合材料的搭接剪切性能

Enhancing the Lap Shear Performance of Resistance-Welded GF/PP Thermoplastic Composite by Modifying Metal Heating Elements with Silane Coupling Agent.

作者信息

Long Wanling, Zhou Xinyu, Du Bing, Cheng Xiangrong, Su Guiyang, Chen Liming

机构信息

Chongqing Key Laboratory of Nano-Micro Composite Materials and Devices, College of Materials and New Energy, Chongqing University of Science and Technology, Chongqing 401331, China.

College of Aerospace Engineering, Chongqing University, Chongqing 400030, China.

出版信息

Materials (Basel). 2024 Oct 10;17(20):4944. doi: 10.3390/ma17204944.

DOI:10.3390/ma17204944
PMID:39459649
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11509599/
Abstract

Thermoplastic composites are gaining widespread application in aerospace and other industries due to their superior durability, excellent damage resistance, and recyclability compared to thermosetting materials. This study aims to enhance the lap shear strength (LSS) of resistance-welded GF/PP (glass fiber-reinforced polypropylene) thermoplastic composites by modifying stainless steel mesh (SSM) heating elements using a silane coupling agent. The influence of oxidation temperature, solvent properties, and solution pH on the LSS of the welded joints was systematically evaluated. Furthermore, scanning electron microscopy (SEM) was utilized to investigate the SSM surface and assess improvements in interfacial adhesion. The findings indicate that surface treatment promotes increased resin infiltration into the SSM, thereby enhancing the LSS of the resistance-welded joints. Treatment under optimal conditions (500 °C, ethanol solvent, and pH 11) improved LSS by 27.2% compared to untreated joints.

摘要

与热固性材料相比，热塑性复合材料因其卓越的耐久性、出色的抗损伤性和可回收性，在航空航天及其他行业中得到了广泛应用。本研究旨在通过使用硅烷偶联剂对不锈钢网（SSM）加热元件进行改性，提高电阻焊接的GF/PP（玻璃纤维增强聚丙烯）热塑性复合材料的搭接剪切强度（LSS）。系统评估了氧化温度、溶剂性质和溶液pH值对焊接接头LSS的影响。此外，利用扫描电子显微镜（SEM）研究了SSM表面，并评估了界面附着力的改善情况。研究结果表明，表面处理促进了树脂向SSM中的渗透，从而提高了电阻焊接接头的LSS。与未处理的接头相比，在最佳条件（500°C、乙醇溶剂和pH值11）下进行处理，LSS提高了27.2%。

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