Biopolymer-based superabsorbent was synthesized by graft copolymerization of partially neutralized acrylic acid (AA) onto glucomannan backbone in konjac bran via a thermal initiator system of potassium persulfate (KPS) and using N,N'-methylenebisacrylamide (NMBA) as a crosslinking agent. The synthesized superabsorbent polymer was characterized by FTIR and SEM. The influence of variables content on the water absorbency property including amounts of AA, KPS, NMBA and konjac bran were investigated. Results obtained from this studied showed that the maximum equilibrium water absorbency was 554 g g-1 in deionized water and 56 g g-1 in 0.9 wt% NaCl aqueous solution under the optimized conditions. Furthermore, the superabsorbent polymer has good water retention, being biodegradable and low cost that can be used in a various range of applications especially in the horticulture and agriculture industry.
Nutnicha Siriwong, Chutimon Satirapipathkul, Chulalongkorn University, Thailand
Stream: Energy: Renewable Energy and Environmental Solutions
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