hydrogels: applications and features

Hydrogels are three-dimensional hydrated polymer networks with transverse connections. theyare formed by cross-linked hydrophilic polymers with a high affinity for water and biologicalfluids and can absorb ten percent to thousands of times their dry weight of water. hydrogels canbe chemically or chemically cross-linked. due to its good mechanical strength, the chemical typeis considered more. there are two types of hydrogels, synthetic and natural, and the natural typeis considered more important than synthetic hydrogels due to its different characteristics, high cost,non-toxicity, unacceptable acceptability, and biocompatibility. hydrogels are used in industriessuch as packaging, agriculture, biomedicine, and pharmaceuticals, as absorbents to removepollutants, etc.