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Dry glue

January 01, 1970

Dry glue is an adhesion product based upon the adaptations of geckos' feet that allow them to climb sheer surfaces such as vertical glass. Synthetic equivalents use carbon nanotubes as synthetic setae on reusable adhesive patches.

Background edit

 
Gecko climbing glass using its natural seta

A gecko can hang on a glass surface using only one toe. This ability is attributed to van der Waals force,[1][2] although a more recent study suggests that water molecules of roughly monolayer thickness (present on virtually all natural surfaces) also play a role.[3]

Developments edit

In 2007, researchers from the University of Akron and Rensselaer Polytechnic Institute announced they had developed a form of flexible, reusable gecko tape using carbon nanotubes to create microscopic synthetic setae and spatulae capable of supporting a shear stress of 32 N/cm2, which is four times the strength of a gecko's foot.[4]

In 2008 researchers from the University of Dayton reported a gecko glue capable of supporting 100N/cm2, ten times the strength generated by a gecko's foot. The research also used carbon nanotubes, but included a curled end which allowed stronger binding but easy removal.[5] Defense Advanced Research Projects Agency (DARPA) has a project called "Z-Man" that is attempting to develop a fabric allowing soldiers to scale vertical walls while carrying a full combat load.[6] In February 2012 Nitto Denko developed a version of gecko tape capable of sticking at temperatures between -150 and 500°C.[7]

See also edit

References edit

  1. ^ . Archived from the original on 2010-06-11. Retrieved 2009-11-08.
  2. ^ Autumn, Kellar; Sitti, Metin; Liang, Yiching A.; et al. (2002). "Evidence for van der Waals adhesion in gecko setae". Proceedings of the National Academy of Sciences of the USA. 99 (19): 12252–12256. Bibcode:2002PNAS...9912252A. doi:10.1073/pnas.192252799. PMC 129431. PMID 12198184.
  3. ^ Huber, G.; Mantz, H.; Spolenak, R.; Mecke, K.; Jacobs, K.; Gorb, S. N.; Arzt, E. (2005). "Evidence for capillarity contributions to gecko adhesion from single spatula nanomechanical measurements". Proceedings of the National Academy of Sciences of the USA. 102 (45): 16293–16296. Bibcode:2005PNAS..10216293H. doi:10.1073/pnas.0506328102. PMC 1283435. PMID 16260737.
  4. ^ Ge, L.; Sethi, S.; Ci, L.; Ajayan, P. M.; Dhinojwala, A. (2007). "Carbon nanotube-based synthetic gecko tapes". Proceedings of the National Academy of Sciences. 104 (26): 10792–10795. Bibcode:2007PNAS..10410792G. doi:10.1073/pnas.0703505104. PMC 1904109. PMID 17578915.
  5. ^ Qu, L.; Dai, L.; Stone, M.; Xia, Z.; Wang, Z. L. (2008). "Carbon Nanotube Arrays with Strong Shear Binding-On and Easy Normal Lifting-Off". Science. 322 (5899): 238–242. Bibcode:2008Sci...322..238Q. doi:10.1126/science.1159503. PMID 18845750. S2CID 9597020.
  6. ^ Goodman, M. . DARPA. Archived from the original on 2012-08-06. Retrieved 2012-07-27.
  7. ^ "Nitto Denko's "Gecko Tape" achieves precise, contamination-free analysis service in the -150- 500°C range" (Press release). Nitto Denko. 2012-02-24. Retrieved 2012-07-27.

External links edit

  • Semiconductor Adhesives

January 01, 1970
glue, adhesion, product, based, upon, adaptations, geckos, feet, that, allow, them, climb, sheer, surfaces, such, vertical, glass, synthetic, equivalents, carbon, nanotubes, synthetic, setae, reusable, adhesive, patches, contents, background, developments, als. Dry glue is an adhesion product based upon the adaptations of geckos feet that allow them to climb sheer surfaces such as vertical glass Synthetic equivalents use carbon nanotubes as synthetic setae on reusable adhesive patches Contents 1 Background 2 Developments 3 See also 4 References 5 External linksBackground edit nbsp Gecko climbing glass using its natural seta A gecko can hang on a glass surface using only one toe This ability is attributed to van der Waals force 1 2 although a more recent study suggests that water molecules of roughly monolayer thickness present on virtually all natural surfaces also play a role 3 Developments editIn 2007 researchers from the University of Akron and Rensselaer Polytechnic Institute announced they had developed a form of flexible reusable gecko tape using carbon nanotubes to create microscopic synthetic setae and spatulae capable of supporting a shear stress of 32 N cm2 which is four times the strength of a gecko s foot 4 In 2008 researchers from the University of Dayton reported a gecko glue capable of supporting 100N cm2 ten times the strength generated by a gecko s foot The research also used carbon nanotubes but included a curled end which allowed stronger binding but easy removal 5 Defense Advanced Research Projects Agency DARPA has a project called Z Man that is attempting to develop a fabric allowing soldiers to scale vertical walls while carrying a full combat load 6 In February 2012 Nitto Denko developed a version of gecko tape capable of sticking at temperatures between 150 and 500 C 7 See also editGecko adhesion Gecko tape Synthetic setaeReferences edit Researchers discover how geckos know when to hold tight Archived from the original on 2010 06 11 Retrieved 2009 11 08 Autumn Kellar Sitti Metin Liang Yiching A et al 2002 Evidence for van der Waals adhesion in gecko setae Proceedings of the National Academy of Sciences of the USA 99 19 12252 12256 Bibcode 2002PNAS 9912252A doi 10 1073 pnas 192252799 PMC 129431 PMID 12198184 Huber G Mantz H Spolenak R Mecke K Jacobs K Gorb S N Arzt E 2005 Evidence for capillarity contributions to gecko adhesion from single spatula nanomechanical measurements Proceedings of the National Academy of Sciences of the USA 102 45 16293 16296 Bibcode 2005PNAS 10216293H doi 10 1073 pnas 0506328102 PMC 1283435 PMID 16260737 Ge L Sethi S Ci L Ajayan P M Dhinojwala A 2007 Carbon nanotube based synthetic gecko tapes Proceedings of the National Academy of Sciences 104 26 10792 10795 Bibcode 2007PNAS 10410792G doi 10 1073 pnas 0703505104 PMC 1904109 PMID 17578915 Qu L Dai L Stone M Xia Z Wang Z L 2008 Carbon Nanotube Arrays with Strong Shear Binding On and Easy Normal Lifting Off Science 322 5899 238 242 Bibcode 2008Sci 322 238Q doi 10 1126 science 1159503 PMID 18845750 S2CID 9597020 Goodman M Z man DARPA Archived from the original on 2012 08 06 Retrieved 2012 07 27 Nitto Denko s Gecko Tape achieves precise contamination free analysis service in the 150 500 C range Press release Nitto Denko 2012 02 24 Retrieved 2012 07 27 External links editSemiconductor Adhesives Retrieved from https en wikipedia org w index php title Dry glue amp oldid 1207541835, wikipedia, wiki, book, books, library,

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