液相法制备Al5052/PMMA接头界面结构与结合性能研究  

Interfacial Structure and Bonding Properties of Al5052/PMMA Joint Prepared by Liquid Phase Method

作　　者：殷官超[1,2] 丁纪俊 张睿智 张建[1,2] 罗国强 李家劲[3] YIN Guanchao;DING Jijun;ZHANG Ruizhi;ZHANG Jian;LUO Guoqiang;LI Jiajin(State Key Laboratory of New Materials Composite Technology,Wuhan University of Technology,Wuhan 430000,China;College of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430000,China;State Key Laboratory of Fine Blasting,Jianghan University,Wuhan 430000,China)

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430000 [2]武汉理工大学材料科学与工程学院,武汉430000 [3]江汉大学精细爆破国家重点实验室,武汉430000

出　　处：《表面技术》2025年第4期251-261,共11页Surface Technology

基　　金：国家重点研发计划项目(2021YFB3802300);广东省基础与应用基础研究重大专项(2021B0301030001)。

摘　　要：目的提高Al5052/PMMA接头结合性能,研究界面结构与结合强度之间的构效关系。方法采用激光打孔结合盐酸腐蚀对5052铝合金(Al5052)表面进行处理,制备了具有多级轮廓特征的表面形貌。随后,采用液相法实现聚甲基丙烯酸甲酯(PMMA)与Al5052的直接连接。最后通过剪切与拉伸实验,并结合离散界面单元模型的仿真结果,系统地讨论了Al5052/PMMA接头界面结构与结合强度之间的构效关系。结果对于先由激光打孔,后经盐酸腐蚀的Al5052基板,与PMMA连接后最大剪切强度为13.94 MPa,最大抗拉强度为9.35 MPa;与未激光打孔、仅盐酸腐蚀的样品相比,最大强度提高了约30%。Al5052/PMMA接头脱粘面根据其形态和失效机制可分为韧性断裂与脆性断裂区域。结论Al5052表面粗糙程度随着盐酸腐蚀处理时间增加,原激光打孔的截面形状逐渐由方变圆,纵深也随之减小。使用液相法制备黏接样品时,Al5052/PMMA接头界面轮廓在物理层面上充分咬合。接头的剪切与拉伸强度均随盐酸腐蚀时间的增加呈现出先增后减的趋势。所得构效关系的结果及其分析过程,将为涉及多级尺度轮廓特征的材料界面结合问题提供重要参考。The direct connection of high strength metals and polymers has attracted more and more attention in the field of engineering.The combination of chemical and physical surface treatment can produce multi-scale profiles on the metal surface,which can effectively improve the connection strength of metal and polymer.In this work,the surface of Al5052 was treated by laser drilling and chemical etching,and the surface morphology of Al5052 with multistage profile was prepared.Then,the direct connection between polymethyl methacrylate(PMMA)and Al5052 was realized by liquid phase bonding.The relationship between the interfacial structure and bonding strength of Al5052-PMMA joint was studied by numerical simulation.The Al5052 was cut by wire cutting into rectangular pieces(30 mm×10 mm×2 mm)and round pieces(8 mm×2 mm)for use.The surface of Al sheet was ablated by nanosecond laser(355 nm)to make regular hole array.The diameter of the holes was 80μm,the depth was 60μm,and the center spacing was 100μm.Then,the Al sheet was cleaned with distilled water and dried in an oven at 50℃,followed by etching with NaOH(50℃)for 10 minutes to remove surface impurities,followed by etching with HCl(50℃),H2O(90℃)for a certain time,and washing with deionized water in ultrasonic waves for 2 minutes between each step.The bonding method was liquid phase method,with bonding solvent as acetone,in which a certain amount of PMMA powder was dissolved in advance,and then silane coupling agent was added and stirred until no obvious solid particles were suspended.The mass ratio of acetone to PMMA powder was controlled at 15:1.After stirring,the solution was dropped on the bonding site of Al sheet and PMMA,and fixed with a mold.A certain pressure was applied to the bonding site,and the sample was taken at room temperature for 24 h.The surface structure of the bonding sample was characterized by electron scanning microscope(ZEISSGeminiSEM300,Germany)and energy dispersive spectrometer(EDS).The bonding strength was tested by mechanical testing m

关 键 词：金属-聚合物连接 表面处理 液相法 结合性能 构效关系 

分 类 号：TB34[一般工业技术—材料科学与工程]