| YIN Guanchao,DING Jijun,ZHANG Ruizhi,ZHANG Jian,LUO Guoqiang,LI Jiajin.Interfacial Structure and Bonding Properties of Al5052/PMMA Joint Prepared by Liquid Phase Method[J],54(4):251-261 |
| Interfacial Structure and Bonding Properties of Al5052/PMMA Joint Prepared by Liquid Phase Method |
| Received:March 29, 2024 Revised:October 25, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.04.021 |
| KeyWord:metal-polymer connection surface treatment liquid phase method bonding properties structure-activity relationship |
| Author | Institution |
| YIN Guanchao |
State Key Laboratory of New Materials Composite Technology,College of Materials Science and Engineering, Wuhan University of Technology, Wuhan , China |
| DING Jijun |
State Key Laboratory of New Materials Composite Technology,College of Materials Science and Engineering, Wuhan University of Technology, Wuhan , China |
| ZHANG Ruizhi |
State Key Laboratory of New Materials Composite Technology,College of Materials Science and Engineering, Wuhan University of Technology, Wuhan , China |
| ZHANG Jian |
State Key Laboratory of New Materials Composite Technology,College of Materials Science and Engineering, Wuhan University of Technology, Wuhan , China |
| LUO Guoqiang |
State Key Laboratory of New Materials Composite Technology,College of Materials Science and Engineering, Wuhan University of Technology, Wuhan , China |
| LI Jiajin |
State Key Laboratory of Fine Blasting, Jianghan University, Wuhan , China |
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| Abstract: |
| 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 80 μm, the depth was 60 μm, and the center spacing was 100 μm. 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 machine. The results showed that the surface cavity corrosion of Al5052 had a significant effect on the shear and tensile strength of the joint. With the increase of chemical etching time, the surface porosity and surface roughness of Al5052 increased, and the contact area with PMMA solution increased, and the HCl etching time of 50 min contributed to the best bonding strength. In short, the shear strength and tensile strength of the joint increased firstly and then decreased with the extension of etching time. Al-PMMA had a maximum shear strength of 13.94 MPa and a maximum tensile strength of 9.35 MPa, approximately 30% stronger than samples without laser drilling. Compared with the samples without chemical corrosion, after hydrochloric acid corrosion, PMMA completely entered the surface pores of Al5052, and the bonding effect was significantly improved. The fracture surface of the Al-PMMA joint with the highest strength could be divided into three different regions according to its morphology and failure mechanism, and ductile fracture and brittle fracture occurred respectively with the change of fracture region. These results are important for the further design and optimization of metal-polymer joints manufactured by this method. |
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