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中文摘要：
用60 Coγ照射引发魔芋-丙烯酸接枝反应,制备接枝聚合物,以聚合物吸水倍数为标准优化反应物用量、干燥温度和方式等。采用FT-IR、SEM技术对产物结构形貌进行表征。结果表明,最佳粗粉接枝工艺为：3g魔芋粉、21mL丙烯酸、12.9mL 9.5mol/L NaOH、131mL水,辐照后8h再进行干燥处理,产物吸自来水倍数可达400倍以上;接枝物具有多层孔状结构,单孔直径约为16μm,孔内有横膜;接枝物含有两种接枝高分子成分,即魔芋KGM-丙烯酸接枝物和魔芋淀粉丙烯酸接枝物。材料的多孔结构是吸水的原因,魔芋辐照改性将为魔芋粗粉的用途开辟新的途径。
英文摘要：
Crude konjac powder and acrylic acid were grafted via 60Co γ ray irradiation and the factors including reactant weight,style and temperature of drying were discussed which affected the water absorption of copolymer.The copolymer structure was characterized by fourier transform infrared spectroscopy（FT-IR） and scanning electron microscopy（SEM）.The results show that the optimum feed ratio is crude konjac powder∶aerylic acid∶NaOH（9.5 mol/L）∶water=3 g∶21 mL∶12.9 mL∶131 mL.The optimum gel drying temperature is 50 ℃.SEM shows that the copolymer has formed dense network structure which is the base of water absorption.FT-IR analysis shows that the crude konjac powder includes starch and it grafts with acrylic acid by irradiation when KGM grafting acrylic acid synchronously.
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