摘要
采用FeCl_(3)腐蚀结合热水浴处理的方法处理A5052表面,利用注塑制备A5052-20%GF/PET单搭接接头。研究腐蚀和水浴处理对A5052表面结构、官能团以及润湿性的影响,并对搭接接头进行力学性能、结合表面、断面SEM表征,结合分子动力学模拟揭示组合处理方法的增强作用机理。结果表明:组合处理可以使A5052表面产生跨尺度形貌,实现界面跨尺度机械互锁,同时热水浴处理在A5052表面产生的Al(OH)_(3),既能提高界面润湿性,又能实现界面处的氢键键合。在跨尺度机械互锁和界面氢键键合的协同作用下,A5052-20%GF/PET接头的拉伸剪切强度从12.65 MPa提高至38.78 MPa,提升206.56%。组合处理充分结合腐蚀和热水浴工艺的优势,为异质界面结合领域提供了一种全新的协同提升思路。
The surface of A5052 was treated using a method combining FeCl_(3) etching and hot-water bath treatment,and single-lap joints of A5052-20%GF/PET were prepared by injection molding.The effects of etching and hot-water treatment on the surface structure,functional groups,and wettability of A5052 were investigated.Additionally,the mechanical properties,bonded surfaces,and fracture surfaces of the lap joints were characterized using SEM,and molecular dynamics simulations were employed to reveal the strengthening mechanism of the combined treatment method.The results indicate that the combined treatment can produce cross-scale surface morphology on A5052,achieving cross-scale mechanical interlocking at the interface.Meanwhile,the Al(OH)_(3) generated on the A5052 surface by hot-water treatment can enhance interfacial wettability and facilitate hydrogen bonding at the interface.Under the synergistic effect of cross-scale mechanical interlocking and interfacial hydrogen bonding,the tensile shear strength of the A5052-20%GF/PET joints increased from 12.65 MPa to 38.78 MPa,representing an improvement of 206.56%.The combined treatment fully integrates the advantages of etching and hot-water treatment,providing a novel synergistic enhancement approach for the field of heterogeneous interface bonding.
作者
郝莹
HAO Ying(School of Intelligent Engineering,Taishan University of Science and Technology,Tai'an 271000,China)
出处
《塑料科技》
北大核心
2025年第7期143-148,共6页
Plastics Science and Technology
基金
山东省高等教育学会高等教育研究专项课题(SDGJ2025C09)。
关键词
注塑
热水浴
腐蚀
拉伸剪切强度
界面结合
Injection molding
Hot water baths
Corrosion
Tensile shear strength
Interfacial bonding
