Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 130, Issue 4, Pages 2912-2922Publisher
WILEY
DOI: 10.1002/app.39427
Keywords
biopolymers and renewable polymers; mechanical properties; synthesis and processing
Categories
Funding
- Indian Council of Medical Research (ICMR), New Delhi, India
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The poor mechanical strength and instability of polysaccharide's gel takes away opportunities for versatile application. The grafting of polyacrylamide (PAM) onto polysaccharide was found to be an efficient tool for transforming its properties and obtaining stable and robust composite microspheres (CMs). In this study, free-radical polymerization reaction was used for the grafting of PAM onto the polysaccharide backbone, and their hydrogel CMs were obtained through an ionotropic gelation method. Porous and buoyant CMs were obtained through the incorporation of sodium bicarbonate into the reaction mixture. Characterizations were done through Fourier transform infrared spectroscopy, thermal and scanning electron microscopy analysis. The mechanical strength and squeezing capacity were evaluated extensively through a modified syringe method developed in-house. The squeezing capacity of grafted CMs diminished with the formation of a complex interpenetrating network. The Young's modulus, swelling kinetics, mechanical strength, and squeezing capacity of the grafted microspheres were compared extensively. (c) 2013 Wiley Periodicals, Inc.
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