Synthesis and Application of Pomelo Peel Cellulose-based Superabsorbent Polymers
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Abstract:
Superabsorbent resins have attracted high attention and research interest, because of their distinct water-absorbing and water-holding properties. In order to utilize pomelo peel and optimize the production process of super absorbent resins, cellulose-based superabsorbent resins with good water and physiological saline absorption properties were prepared via reversed-phase suspension polymerization using natural and non-toxic pomelo peel powder as the graft skeleton, acrylic acid as the grafting monomer, span 80 as the dispersing agent, cyclohexane as the oil phase, potassium persulfate as initiator, and N, N’-methylenebisacrylamide as the crosslinking agent. The effects of influencing factors, such as the amount of span 80, initiator, pomelo peel powder and crosslinking agent, and the neutralization degree of acrylic acid, reaction temperature and ratio of oil to water, on the water or physiological saline absorption rate of the resin were examined. The results showed that the maximum resin absorption rates in distilled water and physiological saline were 362.29 g/g and 42.49 g/g. respectively, when the following conditions were used: amount of span-80, 6.7%; amount of initiator, 0.5%; ration of pomelo peel power: AA, 1:5; amount of crosslinking agent, 0.67%; neutralization degree of acrylic acid, 40%; ratio of oil to water, 2:1; reaction temperature, 80 ℃.
