US 11,905,634 B2
Fabrication of nanofibers as dry adhesives and applications of the same
Shing-Chung Josh Wong, Akron, OH (US); Johnny F. Najem, Okaibe (LB); and Pei Chen, Beijing (CN)
Assigned to THE UNIVERSITY OF AKRON, Akron, OH (US)
Filed by Shing-Chung Josh Wong, Akron, OH (US); Johnny F. Najem, Okaibe (LB); and Pei Chen, Beijing (CN)
Filed on Oct. 25, 2021, as Appl. No. 17/509,464.
Application 17/509,464 is a continuation of application No. 16/044,934, filed on Jul. 25, 2018, granted, now 11,180,877.
Application 16/044,934 is a continuation of application No. 14/720,117, filed on May 22, 2015, granted, now 10,081,891, issued on Sep. 25, 2018.
Application 14/720,117 is a continuation in part of application No. 14/419,358, granted, now 9,511,528, issued on Dec. 6, 2016, previously published as PCT/US2013/053807, filed on Aug. 6, 2013.
Claims priority of provisional application 62/015,570, filed on Jun. 23, 2014.
Claims priority of provisional application 61/679,818, filed on Aug. 6, 2012.
Prior Publication US 2022/0042224 A1, Feb. 10, 2022
Int. Cl. D04H 1/74 (2006.01); C09J 5/00 (2006.01)
CPC D04H 1/74 (2013.01) [C09J 5/00 (2013.01); C09J 2301/31 (2020.08); C09J 2400/263 (2013.01); Y10T 29/49801 (2015.01); Y10T 29/53526 (2015.01); Y10T 428/24132 (2015.01)] 18 Claims
OG exemplary drawing
 
1. A dry adhesive comprising:
a non-woven fabric of overlapping electrospun nanofibers comprising a polymeric material, the nanofibers comprising an average diameter within a range of from 50 nm to 10000 nm, and the non-woven fabric of nanofibers having a sheet-like form and comprising a thickness within a range of from 0.1 μm to 100 μm;
wherein, the dry adhesive is removable and reusable, and has a shear adhesion strength when applied to a glass slide that is higher than a normal adhesion strength of the dry adhesive when applied to the glass slide, the normal adhesion strength being the adhesive strength measured in a direction that is generally perpendicular with a surface of the non-woven fabric applied to the glass slide, and
wherein, at least 70 percent of the nanofibers are substantially aligned.