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Hydrogel
Soft water-rich polymer gel / From Wikipedia, the free encyclopedia
A hydrogel is a biphasic material, a mixture of porous, permeable solids and at least 10% by weight or volume of interstitial fluid composed completely or mainly by water.[1][2] In hydrogels the porous permeable solid is a water insoluble three dimensional network of natural or synthetic polymers and a fluid, having absorbed a large amount of water or biological fluids.[2][3][4][5] These properties underpin several applications, especially in the biomedical area. Many hydrogels are synthetic, but some are derived from nature.[6][7] The term 'hydrogel' was coined in 1894.[8]
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