Surface pre-treatment of aluminum alloy for mechanical improvement of adhesive bonding by maple-assisted pulsed laser evaporation technique

被引:0
作者
Rusen, Edina [1 ]
Brincoveanu, Oana [2 ,3 ]
Dinca, Valentina [4 ]
Toader, Gabriela [5 ]
Diacon, Aurel [1 ,5 ]
Dinescu, Miron Adrian [2 ]
Mocanu, Alexandra [1 ,2 ]
机构
[1] Univ Politehn Bucuresti, 1-7 Gh Polizu,Polizu Campus,Sect 1, RO-011061 Bucharest, Romania
[2] Natl Inst Res & Dev Microtechnol IMT Bucharest, 126A Erou Iancu Nicolae St, Bucharest 077190, Romania
[3] Univ Bucharest, ICUB Bucharest, Res Inst, Soseaua Panduri 90, Bucharest 050663, Romania
[4] Natl Inst Laser Plasma & Radiat Phys, 409 Atomistilor St, Magurele 077125, Ilfov, Romania
[5] Mil Tech Acad Ferdinand I, 39-49 Blvd George Cosbuc,Sect 5, Bucharest 050141, Romania
关键词
MOLECULAR-WEIGHT; TENSILE-STRENGTH; SUPERHYDROPHILIC SURFACES; PERFORMANCE; FABRICATION; DEPOSITION; DENSITY; JOINTS;
D O I
10.1039/d4ra03187c
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Adhesive joints are widely used for structural bonding in various industrial sectors. The performance of bonded joints is commonly attributed to the cleanliness of the substrate and the pre-treatment of the surfaces to be bonded. In this study, the Matrix Assisted Pulsed Laser Evaporation (MAPLE) deposition technique was used for surface modification of aluminum (Al) plates by the deposition of poly(propylene glycol) bis(2-aminopropyl ether) (PPG-NH2) of different number average molecular weights (Mn) of 400 g mol-1, 2000 g mol-1, and 4000 g mol-1, respectively. Fourier-transformed infrared spectroscopy (FT-IR) analysis indicated the characteristic peaks for the deposited layers of PPG-NH2 of different molecular weights in all cases while scanning electron microscopy (SEM) revealed continuous layers on the surface of Al plates. In order to demonstrate alterations in the wettability of Al substrates, a crucial aspect in surface treatment and adhesive bonding, measurements of contact angles, surface free energies (SFE), and adhesion work (Wa) were conducted. The tensile strength measurements were performed using the lap-joint test after applying the commercial silyl-based polymer adhesive Bison Max Repair Extreme Adhesive (R). It was evidenced that at higher values of the SFE and Wa, the tensile strength was almost 3 times higher for PPG-NH2 with Mn = 4000 g mol-1 compared with the untreated Al sample. This study provides valuable insights into the successful application of the MAPLE technique as a pre-treatment method for reinforcing adhesive bonding of Al plates, which can lead to improved mechanical performance in various industrial applications. Adhesive joints are widely used for structural bonding in various industrial sectors. Surface pre-treatment of aluminum alloys by MAPLE technique using polymers with different molecular weights.
引用
收藏
页码:22627 / 22641
页数:15
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