PMID- 23072291 OWN - NLM STAT- MEDLINE DCOM- 20130326 LR - 20131121 IS - 1520-5827 (Electronic) IS - 0743-7463 (Linking) VI - 28 IP - 43 DP - 2012 Oct 30 TI - Wet self-cleaning of superhydrophobic microfiber adhesives formed from high density polyethylene. PG - 15372-7 LID - 10.1021/la303017a [doi] AB - Biologically inspired adhesives developed for switchable and controllable adhesion often require repetitive uses in general, dirty, environments. Superhydrophobic microstructures on the lotus leaf lead to exceptional self-cleaning of dirt particles on nonadhesive surfaces with water droplets. This paper describes the self-cleaning properties of a hard-polymer-based adhesive formed with high-aspect-ratio microfibers from high-density polyethylene (HDPE). The microfiber adhesive shows almost complete wet self-cleaning of dirt particles with water droplets, recovering 98% of the adhesion of the pristine microfiber adhesives. The low contact angle hysteresis indicates that the surface of microfiber adhesives is superhydrophobic. Theoretical and experimental studies reveal a design parameter, length, which can control the adhesion without affecting the superhydrophobicity. The results suggest some properties of biologically inspired adhesives can be controlled independently by adjusting design parameters. FAU - Lee, Jongho AU - Lee J AD - Mechatronics, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, S. Korea. jong@gist.ac.kr FAU - Fearing, Ronald S AU - Fearing RS LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20121016 PL - United States TA - Langmuir JT - Langmuir : the ACS journal of surfaces and colloids JID - 9882736 RN - 0 (Adhesives) RN - 059QF0KO0R (Water) RN - 9002-88-4 (Polyethylene) SB - IM MH - Adhesives/*chemistry MH - Animals MH - Biomimetics MH - *Hydrophobic and Hydrophilic Interactions MH - Polyethylene/*chemistry MH - Water/*chemistry EDAT- 2012/10/18 06:00 MHDA- 2013/03/27 06:00 CRDT- 2012/10/18 06:00 PHST- 2012/10/18 06:00 [entrez] PHST- 2012/10/18 06:00 [pubmed] PHST- 2013/03/27 06:00 [medline] AID - 10.1021/la303017a [doi] PST - ppublish SO - Langmuir. 2012 Oct 30;28(43):15372-7. doi: 10.1021/la303017a. Epub 2012 Oct 16.