Effects Of Pretreatment,Cross-linking Agent And Initiator On Water Absorbency Of Cellulose-based Superabsorbent Resin

With the shortage of energy sources and the increase of people’s environment awareness, mankind begins to search for new energy sources. Currently, biomass is considered to be an important renewable carbon resource that can be converted into normal fuels as well as other chemicals or products. Cellulose is the most abundant organic raw material in the world, and it is the only renewable resource that is available in large quantities. The development and application of cellulose remains to be further improved. According to previous research findings and existing literature reports, the paper attempts to improve the water absorbency of cellulose-based superabsorbent resin by means of using solution graft polymerization with cellulose as raw material.The absorbency of resin after acid pretreatment and thermal pretreatment of cellulose was compared; the influence of different solvents as media on absorbency was also investigated. The result showed that the pretreatment of cellulose with dilute acid and suitable organic solvents is beneficial to improving the water absorbency of the resin. And, the water absorbency of resin, which was synthesized with acetone aqueous solution as solvent after acid pretreatment of microcrystalline cellulose, was the lowest; followed by methanol and ethanol aqueous solution as solvents; and the absorbency of resin which took isopropanol and formaldehyde aqueous solution as solvents after acid pretreatment of microcrystalline cellulose was the highest. Under optimal conditions the absorbability of resin in distilled water reached992g·g-1.This paper compares and analyzed the factors on the absorbency of cellulose-based superabsorbent resin. Under the same conditions, the absorbency of resin with a3-fold increase reached921g·g-1with N, N’-methylene-bisacrylamide as cross-linking agent and distilled water as solvent. Under the same reaction temperature and neutralization degree, the absorbency in distilled water was922g·g-1with A1(OH)3as cross-linking agent. In addition, microcrystalline cellulose content increased2.5times.