Issue 21, 2024, Issue in Progress

Polydimethylsiloxane based dry adhesives produced using a replica molding technique

Abstract

Dry adhesives have gained considerable interest due to their applications in a wide variety of areas. This study used a replica molding technique to produce micron-sized pillars on the surface of polydimethylsiloxane (PDMS) and investigated their dry adhesion behaviour. Shear adhesion for the produced samples is measured using a tensile testing machine. For this purpose, the sample was initially brought into contact with a glass slide. Following this, the shear adhesion was determined by measuring the shear stress required to slide the sample along the glass slide. Peel adhesion of the samples was measured using an in-house designed and built peel fixture. The force required to peel the sample from the surface of the fixture was measured to determine the peel strength. The shear adhesion and peel tests were also conducted on neat PDMS to determine the effect of surface micropillars on the adhesion performance of the samples. The results show that the shear adhesion strength was 0.12 N cm−2, while the shear adhesion strength of neat PDMS was determined to be 0.02 N cm−2. Similarly, the peel strength of the samples was recorded to be 0.15 N cm−2 compared to 0.05 N cm−2 recorded for neat PDMS.

Graphical abstract: Polydimethylsiloxane based dry adhesives produced using a replica molding technique

Article information

Article type
Paper
Submitted
26 Jan 2024
Accepted
16 Apr 2024
First published
07 May 2024
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2024,14, 14807-14814

Polydimethylsiloxane based dry adhesives produced using a replica molding technique

H. T. M. Hassani, W. W. Dsouza, S. V. Oopath and A. Baji, RSC Adv., 2024, 14, 14807 DOI: 10.1039/D4RA00667D

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