文献类型：期刊文献

英文题名：Effect of Pretreatment on the Interfacial Bonding Strength between Modified Polyolefin and Aluminum Foil Treated with Trivalent Chromium Chemical Conversion: Experimental, Quantum Chemical Calculations and Molecular Dynamics Simulation

作者：Xu, Jiajun[1]; Xu, Shiai[1,2]; Hao, Junzhe[1]; Cao, Hailian[1]; Miao, Han[1]

机构：[1] School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] School of Chemical Engineering, Qinghai University, Xining, 810016, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230276885)

语种：英文

外文关键词：Acrylic monomers - Adhesion - Adhesives - Alkalinity - Aluminum coatings - Binders - Bond strength (materials) - Chemical bonds - Chromium compounds - Contact angle - Free energy - Lithium-ion batteries - Quantum chemistry

摘要：Good adhesive strength and joint durability are necessary for aluminum (Al)/polymer laminated film for lithium-ion battery packages. A pretreatment method involving alkaline degreasing followed by acid pickling was employed to treat the Al foil surface to facilitate the deposition of trivalent chromium [Cr(III)] conversion coating on the surface. The effect of pretreatments on the interfacial bond strength between propylene-based elastomer grafted glycidyl methacrylate (GMA-g-PBE) and Cr(III)-converted Al foil was studied from macroscopic to microscopic perspectives. The results indicate that the pretreatment of 0.5 M HF pickling results in complete coverage of the Cr(III) compound on the Al foil compared to other pretreatments. A higher content of Cr(III) compound results in increased surface free energy on the Cr(III)-converted Al foil, which improves the wettability of adhesive melt on the substrate and enhances adhesion strength. Consequently, the adhesive strength of GMA-g-PBE/Cr(III)-converted Al foil pretreated with 0.5 M HF pickling was 51% higher than Cr(III)-converted Al foil without pretreatment. Moreover, quantum chemical calculations (QCC) and molecular dynamics (MD) simulations were used to explore the interface bonding mechanism, and the results indicate that GMA in the adhesive exhibits greater bonding strength with Cr(III) oxides and hydroxides compared to Al oxides and hydroxides. ? 2023, The Authors. All rights reserved.