Composition dependent structural modulations in transparent poly(vinyl alcohol) hydrogels.
Transparent and stable Poly(vinyl alcohol) hydrogels were synthesized from polymer aqueous solution without resorting to a mixed solvent such as dimethyl sulfoxide and water. Contrary to the reported methods involving hydrogen bond induced physical crosslinking by repeated freeze-thawing at -20 degrees C, the present process demonstrates the gelation taking place at relatively higher temperature, i.e. 0 degrees C. While maintaining transparency in all the synthesized hydrogels, the present paper reports systematic structural and morphological variations in the hydrogels as a function of polymer concentration.
Gupta
Siddhi
S
National Metallurgical Laboratory (Council of Scientific and Industrial Research), Jamshedpur, 831007, India.
Pramanik
Ashit Kumar
AK
Kailath
Ansu
A
Mishra
Trilochan
T
Guha
Avijit
A
Nayar
Suprabha
S
Sinha
Arvind
A
D002152:Calorimetry, Differential Scanning; D003460:Crystallization; D020100:Hydrogels / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D011208:Powders; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
D020100:Hydrogels; D011208:Powders; D011142:Polyvinyl Alcohol