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D3o
D3O (formally "D3o") is a dilatant non-Newtonian fluid.
D3O is a substance used in impact protection due to its energy absorptive properties. In its raw state it flows freely when moved slowly, but on shock, locks together to absorb and disperse energy, before returning to its flexible state. This characteristic provides protection, as well as material flexibility. D3O's technology is sometimes used in skiing/snowboarding in beanies and ski suits. The material is sewn into the lining of the beanie. The orange "putty" is composed of freely moving molecules however, upon impact the molecules bind together turning the soft putty into a solid block. This may prevent trauma to the head or if hit by an object.
==History==
British engineer Richard Palmer discovered the material in 1999, first isolating it at the University of Hertfordshire and went on to found the firm 'D3O Lab' to develop and market the product.〔 Article was written by Maria Kamenev, a ''BusinessWeek'' intern.〕〔web|url=http://www.telegraph.co.uk/finance/businessclub/10988649/Real-life-Flubber-made-in-the-UK-saving-lives-in-war-zones-and-on-the-football-field.html|title=Real-life 'Flubber', made in the UK, saving lives in war zones and on the football field|publisher=The Daily Telegraph|date=2014-08-19〕 The company commercialized the material in 2006. In 2009, the UK Ministry of Defence awarded D30 Lab £100,000 to fit helmets in order to reduce the kinetic energy of a bullet or shrapnel on impact, because of its moldable properties.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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