Preparation of Super Absorbent Polymer by Banana Peel Grafted with Acrylic Acid
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Abstract:
A super absorbent polymer was synthesized by means of free-radical graft copolymerization in the aqueous solution. The natural and cellulose-rich banana peel was used as the grafting skeleton and the acrylic acid was used as the grafting monomer to realize the waste reclamation of banana peel and optimize the production process of resin. The effects of acrylic acid neutralization degree, total water content of the system, amount of banana peel powder, initiator dosage and crosslinker dosage on the water absorption of resin in distilled water and 0.9% NaCl solution were investigated. The effects of sodium sulfite on polymerization time, temperature and the changes of resin temperature after the expansion of reaction system were also studied. Results showed that the dosage of each reagent had different effects on the water absorption of resin. The water absorption of the resin formed under the optimum process was 161.05 g/g and 46.03 g/g respectively for distilled water and normal saline. In addition, sodium sulfite could shorten the reaction time and reduce the initiation temperature. For a large-scale reaction, the graft copolymerization can be completed by its exothermic reaction. This study simplified the production process and optimized the production conditions, showing good application prospects.
