Reusable dry adhesives based on ethylene vinyl acetate copolymer with strong adhesion

Abstract

This work proposed the design and fabrication method for T‐shaped dry adhesives based on stretchable ethylene‐vinyl acetate (EVA) copolymer, with strong normal adhesion strength up to 70 N cm−2. As fabricated adhesives based on the inexpensive soft replication process have comprehensive advantages including easy demolding applicable for various curable materials; self‐cleaning characteristic based on excellent nonwetting characteristics to both water and oil; reversible adhere/detach cycling for reusability. The flexible and transparent EVA dry adhesive films were readily fabricated to be novel dry‐adhesive coatings decorated on various substrates and shapes. We also explored the adhere and detach mechanism for the significantly enhanced adhesion of T‐shaped EVA microstructures, which indicated the increased contact area and the friction dissipation between the undercut and the substrate contribute to the adhesion enhancement, while the excellent elastic deformation of EVA may play an important role for adhesion enhance during the pulling‐off process. These results showed the great potential of high‐performance T‐shaped EVA‐based polymer dry adhesives for practical applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47296.

Flexible Electrodes for Brain–Computer Interface System

“…[116b] Copyright 2022, Elsevier g) SEM images of T-shaped master templates. Reproduced with permission [166] . Copyright 2018, Wiley-VCH.…”

“…Other techniques, such as coating, utilizing natural adhesive materials or compliant micro/nano structures have also been applied improving the adhesion (Figure 8g). [166] Neto et al used indium zinc oxide (IZO) coating improving silver nanowires (AgNWs) adhesion to the parylene C substrate. [119] Zhou et al utilized biocompatible adhesive, such as PEG or silk fibroin gel, to minimize the invasiveness of the neural probes with a shuttle device during the implantation.…”

“…Other techniques, such as coating, utilizing natural adhesive materials or compliant micro/nano structures have also been applied improving the adhesion (Figure 8g). [ 166 ] Neto et al used indium zinc oxide (IZO) coating improving silver nanowires (AgNWs) adhesion to the parylene C substrate. [ 119 ] Zhou et al.…”

Patterning of worm‐like soft polydimethylsiloxane structures using a TiO2 nanotubular array

“…Soft lithography, an alternative method to photolithography, provides low cost and rapid fabrication of microstructures and nanostructures by eliminating the need for intense radiation equipment. 1 Such nanofabrication technique is rapidly advancing many areas of research such as tissue engineering, 2 protein printing, 3 antibiofouling, 4 dry adhesive, 5 and microfluidic. 6 The process begins with fabrication of patterned mold or stamp, which is deployed to replicate the microstructure or nanostructure.…”