热塑性碳纤维/尼龙6复合材料界面优化及零件快速成型工艺研究  

Interfacial Optimization and Rapid Prototyping Process of Thermoplastic Carbon Fiber/Nylon 6 Composites for Automotive Lightweight

作　　者：高聪 祝颖丹[2] 刘伯芳 李铁虎 王志白 冯刚 Gao Cong;Zhu Yingdan;Liu Bofang;Li Tiehu;Wang Zhibai;Feng Gang(Changan Auto Global R&D Center,Chongqing Changan Automobile Co.,Ltd.,Chongqing 401120;Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201;School of Artificial Intelligence,Chongqing University of Technology,Chongqing 401135)

机构地区：[1]重庆长安汽车股份有限公司汽车工程研究总院,重庆401120 [2]中国科学院宁波材料技术与工程研究所,宁波315201 [3]重庆理工大学两江人工智能学院,重庆401135

出　　处：《汽车工程》2024年第3期546-556,共11页Automotive Engineering

基　　金：国家自然科学基金(U1909220,62004020);重庆市技术创新与应用发展专项重点项目(cstc2021jscx-dxwtBX0022,csct2020jscx-dxwtBX0023);宁波市科技创新2025重大专项(2019B10107)资助。

摘　　要：碳纤维复合材料具有质轻高强等优势,是绝佳的轻量化材料,但汽车常用的碳纤维复合材料以环氧树脂等热固性树脂为基体,大规模应用会面临不易回收的难题。热塑性碳纤维复合材料具有易回收的优势,但其如何提升碳纤维与热塑性树脂的界面结合力及零件成型效率是行业难题。本文以热塑性碳纤维/尼龙6复合材料为研究对象,针对商品化碳纤维/尼龙6界面相容性差的问题,创新设计一种新型的可溶性共聚酰胺上浆剂,将碳纤维/尼龙6的界面强度提升74.2%,显著提升了碳纤维/尼龙6的综合性能。同时,优化预浸料制备和连续模压成型的工艺参数,将碳纤维顶盖横梁的模压生产效率提升至3.4 min/件,满足汽车行业大批量产节拍要求。同时,碳纤维/尼龙6顶盖横梁具有极高的弯曲强度和模量,与钢制件相比轻量率达68.8%。综上,本文为热塑性碳纤维复合材料(易回收)在汽车上的批量化应用提供了创新解决方案。Carbon fiber composite materials have advantages such as lightweight and high strength,making them excellent lightweight materials.However,the commonly used carbon fiber composite is based on thermosetting resins such as epoxy resin matrix,facing the challenge of recycling for large-scale application.Thermoplastic carbon fiber composite materials have the advantage of easy recycling,but how to improve the interfacial adhesion of carbon fiber/thermoplastic resins and the efficiency of part forming are the industry challenges.In this paper,taking thermoplastic carbon fiber/nylon 6 composite materials as the research object,for the problem of poor interfacial compatibility of commercialized carbon fiber/nylon 6,a new soluble co-polyamide sizing agent is innovatively designed,which increases the interfacial strength of carbon fiber/nylon 6 by 74.2%and significantly improves the comprehensive performance of carbon fiber/nylon 6.At the same time,the process parameters of prepreg preparation and continuous hot pressing forming are optimized to increase the hot pressing production efficiency of carbon fiber top cover crossbeams to 3.4 min/piece,meeting the requirements of mass production in the automotive industry.Meanwhile,the carbon fiber/nylon 6 top cover crossbeam has extremely high bending strength and modulus,with a weight reduction rate of 68.8%compared to steel parts.In summary,this article provides an innovative solution for mass application of thermoplastic carbon fiber composites(easily recyclable)in automobiles.

关 键 词：轻量化 碳纤维 尼龙 界面性能 快速成型 

分 类 号：U466[机械工程—车辆工程]