Surface treatment and solvent co-assisted easy direct bonding of polymer/metal

Abstract

An easy direct bonding method to join polymers and metals without using complex equipment was developed in this paper. The results showed that microcraters and nanopores were obtained after chemical treatment, the interface in cross-section fit well and formed interlocks at the microscale, and the polymer resin had friction interaction at the nanoscale with the metal during de-bonding. The bonding strength and failure work values reached 6.45 MPa and 316 mJ/cm2, respectively. The images of the de-bonded polymer surfaces indicated that the interlocks were established by the polymer which diffused into the pores after the vaporing of the bonding solvent and underwent different degrees of deformation when the metal surface was filled with different scales of complex nanopores network structure, which is a determinant of obtaining bonding strength, while on the other hand, negative factors to the bonding performance were also discussed. The processing procedures were investigated to obtain the effective parameters which could process the Al5052 surface full of nanopores network.

Keywords

• Polymer-metal direct bonding
• Surface treatment
• Microscale interlocks
• Friction interaction on nanoscale
• De-bonding analysis