Compliant yet tough hydrogel systems as ultrasound transmission agents
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United States of America Patent
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Jan 30, 2018
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Dec 16, 2015
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Dec 22, 2014
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Abstract
Method for making a tough and compliant hydrogel. A precursor hydrogel is made of a first polymer selected to maintain high elasticity and a second polymer selected to dissipate mechanical energy. The precursor hydrogel is stretched to a multiple of its original length to form a pre-stretched hydrogel. The pre-stretched hydrogel is allowed to relax and is soaked in a biocompatible solvent to reach equilibrium swelling of the pre-stretched hydrogel whereby shear modulus of the hydrogel is reduced.
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