나노 또는 마이크로 입자를 이용한 건식 접착제의 제조 및 특성 분석

Abstract

In this study, the micro- and nano-particles were used and their shapes were transferred into the polydimethylsiloxane (PDMS) film to fabricate the dry adhesives and their properties were investigated. The particle sizes of 20 nm, 40 nm and 70 nm of Cu nanoparticles and the particle size of 5 µm of polymethylmethacrylate (PMMA) were used to transfer their images and the resultant properties of the dry adhesive were compared. The effects of particle size and materials on the mechanical property, tensile adhesion strength, light transmittance, surface morphology, water contact angle were characterized. The dry adhesives obtained from the transfer of 20 nm of Cu nanoparticles resulted in the enhancement of tensile adhesion strength more than 300% compared to that of the bare PDMS. The formation of nanostructure on the surface of the PDMS film by the Cu nanoparticles may responsible for the improvement. This study suggests that the use of nanoparticles during the fabrication of PDMS dry adhesives is easy and effective.