Hydrogels by Rabia Kocak

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Slide Notes

Hydrogels

Published on Nov 19, 2015

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PRESENTATION OUTLINE

HYDROGELS

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Soft contact lenses, disposable nappies, hair gel and plant water crystals all make use of substances called hydrogels. These are polymers which have the unusual property of being able to absorb huge quantities of water.

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Hydrogels are formed by crosslinking polymer chains — through physical, ionic or covalent interactions — and are well known for their ability to absorb water. In most cases, they are homogeneous materials, and their bulk properties are characterized and considered with regard to applications.

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Hydrogel products constitute a group of polymeric materials, the hydrophilic structure of which renders them capable of holding large amounts of water in their three-dimensional networks. Extensive employment of these products in a number of industrial and environmental areas of application is considered to be of prime importance. As expected, natural hydrogels were gradually replaced by synthetic types due to their higher water absorption capacity, long service life, and wide varieties of raw chemical resources. Literature on this subject was found to be expanding, especially in the scientific areas of research. However, a number of publications and technical reports dealing with hydrogel products from the engineering points of view were examined to overview tech…

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Rabia Kocak