Preparation and characterization of hydrophilic, spectroscopic, and kinetic properties of hydrogels based on polyacrylamide and methylcellulose polysaccharide

• Published in: Journal of applied polymer science Vol. 120; no. 5; pp. 3004 - 3013
• Main Authors: Aouada, Fauze Ahmad, Moura, Márcia Regina de, Lopes da Silva, Wilson Tadeu, Muniz, Edvani Curti, Mattoso, Luiz Henrique Capparelli
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.06.2011; Wiley; Wiley Subscription Services, Inc
• Subjects: Applied sciences; biodegradable; Cellulose and derivatives; crosslinking; Exact sciences and technology; Hydrogels; hydrophilic polymers; Materials science; Natural polymers; Nuclear magnetic resonance; Organic polymers; Physicochemistry of polymers; Polyacrylamides; Polymers; polysaccharides; Properties and characterization; Reaction kinetics; Scanning electron microscopy; Solution and gel properties; Spectroscopy; Swelling; Uptakes; polysaccharides; biodegradable; Swelling; hydrogels; Cellulose(methyl); Semiinterpenetrating polymer network; Experimental study; Colloidal gel; hydrophilic polymers; Free radical polymerization; Medium effect; Aqueous medium; Morphology; Preparation; Acrylamide copolymer; Cellulose derivatives; Property structure relationship; Kinetics; Hydrogel; crosslinking; Cellulose ether
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.33425

Hydrogels with potential technological applications has been prepared using polyacrylamide (PAAm) and methylcellulose (MC) polymers by free radical polymerization reaction. The spectroscopic, morphological, swelling, and kinetic properties were investigated by solid state 13C VACP‐MAS nuclear magnetic resonance (NMR), fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), water uptake (WU) measurements, respectively. FTIR and NMR analysis confirmed the formation of semi‐IPN structured hydrogel. Data from WU and SEM revealed that the addition of MC into the solution‐forming hydrogel leads to increase in average pore size and hydrophilicity. By varying of AAm, MC, pH and ionic‐strength of swelling medium, it was possible to obtain hydrogels with hydrophilic properties controlled and optimized. The water uptake mechanism is dependent of the AAm concentration, which can follow the Fickian diffusion and anomalous transport process. In this way, PAAm‐MC hydrogels are promising materials for technological applications, such as agricultural field. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011