Rice husk cellulose was prepared from agricultural waste rice husk by pretreatment.Using acrylic acid(AA) as the polymerization monomers,N,N′-Methylenebis-Acrylamide (MBA) as the crosslinking agent and potassium persulfate(KPS) as the initiator,rice husk cellulose based superabsorbent resin with excellent properties was synthesized by aqueous solution polymerization.The effects of reaction temperature,monomer amount,initiator concentration,monomer neutralization degree and crosslinking agent amount on the water absorption of the resin were explored.The properties of water absorbent resin were studied by water absorption ratio test,Fourier infrared spectroscopy (FTIR),thermogravimetric analysis (TG),X-ray diffraction (XRD) and scanning electron microscope (SEM).The results showed that the optimal conditions for preparing rice husk cellulose were as follows:rice husk cellulose of 0.8g,polymerization reaction temperature of 70℃,AA dosage of 11mL,potassium persulfate dosage of 1.5%,AA monomer neutralization degree of 75%,and the MBA crosslinking agent dosage of 0.014%.Under the optimal conditions,the maximum water absorption of the prepared superabsorbent resin was 389g/g.
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基金资助
湖南省高等学校“双一流”建设项目(湖南省应用特色学科材料科学与工程学科,湘教通[2018]469号);湖南省自然科学基金项目(2020JJ5120);湖南省教育厅科学研究项目(21A0567)
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