scholarly journals Bio-inspired Composite Microfibers for Strong and Reversible Adhesion on Smooth Surfaces

2019 ◽  
Vol 59 (1) ◽  
pp. 227-235 ◽  
Author(s):  
D -M Drotlef ◽  
C B Dayan ◽  
M Sitti
Keyword(s):  
High Performance ◽  
Smooth Surfaces ◽  
Transfer Printing ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive ◽  
Reversible Adhesion ◽  
High Adhesion ◽  
Novel Approach ◽  
Adhesion Performance ◽  
Wearable Medical

Abstract A novel approach for high-performance gecko-inspired adhesives for strong and reversible adhesion to smooth surfaces is proposed. The composite patterns comprising elastomeric mushroom-shaped microfibers decorated with an extremely soft and thin terminal layer of pressure sensitive adhesive. Through the optimal tip shape and improved load sharing, the adhesion performance was greatly enhanced. A high adhesion strength of 300 kPa together with superior durability on smooth surfaces are achieved, outperforming monolithic fibers by 35 times. Our concept of composite microfibrillar adhesives provides significant benefits for real world applications including wearable medical devices, transfer printing systems, and robotic manipulation.

scholarly journals Adhesion Performance and Recovery of Acrylic PSA with Acrylic Elastomer (AE) Blends via Thermal Crosslinking for Application in Flexible Displays

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1959 ◽  
Author(s):  
Jung-Hun Lee ◽  
Gyu-Seong Shim ◽  
Hyun-Joong Kim ◽  
Youngdo Kim
Keyword(s):  
Crosslinking Agent ◽  
Peel Strength ◽  
Mechanical Analysis ◽  
Pressure Sensitive Adhesive ◽  
Flexible Display ◽  
Flexible Displays ◽  
Adhesion Properties ◽  
Pressure Sensitive ◽  
Thermal Crosslinking ◽  
Adhesion Performance

Acrylic pressure-sensitive adhesive (PSA) is used to fix each layer of a flexible display. Acrylic PSA needs to satisfy specific elongation and recovery requirements so that reliability of the flexible display can be achieved. For this reason, we aimed to design an acrylic PSA/acrylic elastomer (AE) blend and to study how some viscoelastic and adhesion properties are influenced by the AE content into the mixed, blended system. Samples were characterized by UV–Vis spectrophotometry for transmittance, texture analysis for adhesion performances, and dynamic mechanical analysis (DMA) for recovery and viscoelasticity. When acrylic PSA/AE was simply blended, the adhesion performance changed due to the influence of the long molecular chains of AE. Based on this result, the AE content was fixed at 10 wt %, and acrylic PSA prepolymer was crosslinked at different concentrations of crosslinking agent. Peel strength and probe tack decreased as the concentration of crosslinking agent increased, as reported in previous studies. On the other hand, as the content of the crosslinking agent increased, recovery characteristics were improved. Additionally, as the content of the crosslinking agent increased, the storage modulus also increased, although the glass-transition temperature was not affected. According to these findings, we successfully proved the possibility of using AE to adjust adhesion performance and recovery of acrylic PSA for designing flexible displays.

High Performance Pressure Sensitive Adhesive Tapes for Use in Engine Compartments

1993 ◽  
Author(s):  
Paul S. Goldsmith ◽  
Abboud L. Mamish ◽  
Jerry M. Serra ◽  
Stephanie L. Michaels
Keyword(s):  
High Performance ◽  
Pressure Sensitive Adhesive ◽  
Performance Pressure ◽  
Pressure Sensitive

Passivation of pressure sensitive adhesive stickies by addition of acrylic fibers to OCC pulp before papermaking

TAPPI Journal ◽  
2016 ◽  
Vol 15 (10) ◽  
pp. 631-639
Author(s):  
MOHAMMAD HADI ARYAIE MONFARED ◽  
HOSSEIN RESALATI ◽  
ALI GHASEMIAN ◽  
MARTIN A. HUBBE
Keyword(s):  
Adverse Effects ◽  
Control Sample ◽  
Pressure Sensitive Adhesive ◽  
Acrylic Fiber ◽  
Burst Strength ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Tear Index ◽  
Breaking Length ◽  
Acrylic Fibers

This study investigated the addition of acrylic fiber to old corrugated container (OCC) pulp as a possible means of overcoming adverse effects of water-based pressure sensitive adhesives during manufacture of paper or paperboard. Such adhesives can constitute a main source of stickies, which hurt the efficiency of the papermaking process and make tacky spots in the product. The highest amount of acrylic fiber added to recycled pulps generally resulted in a 77% reduction in accepted pulp microstickies. The addition of acrylic fibers also increased pulp freeness, tear index, burst strength, and breaking length, though there was a reduction in screen yield. Hence, in addition to controlling the adverse effects of stickies, the addition of acrylic fibers resulted in the improvement of the mechanical properties of paper compared with a control sample.

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