21. Current flowing through the plastic makes the hydrogel shrink or swell, says Madou. 22. -Use hydrogels for container plants and in beds where plants require regular watering. 23. Disposable diapers are made of superabsorbent polymers, or hydrogels , that retain moisture. 24. He estimated that the hydrogel would pay for itself in less than a year. 25. These hydrogels can be used for wound dressing. 26. Radical polymerization also aids synthesis of nanocomposite hydrogels . 27. These values are more that twice the values of oxygen permeability for hydrogel materials. 28. Other transparent, permeable materials were tested, including hydrogel polymers in the 1960s. 29. Hydrogels are controlled drug delivery agents that can be engineered to have desired properties.30. Materials include polymers, responsive hydrogels , shape memory polymers and bio-materials.
