醚化海藻酸钠改性吸水树脂的制备和性能研究

Study on preparation and properties of etherificated sodium alginate superabsorbent polymer

对海藻酸钠进行醚化改性,以提高其相容性和化学稳定性,同时采用水溶液聚合法,选择丙烯酸(AA)与丙烯酰胺(AM)单体与醚化海藻酸钠(ESA)通过共混、交联方式制备了高吸水材料,对其溶胀性能和热稳定性进行了研究.结果表明,当ESA、AM占总单体质量的20%和10%,交联剂、引发剂占总单体质量的0.6%和0.2%时,ESA-Co-AA-Co-AM吸去离子水倍率最高达411 g/g,吸盐水倍率均在65 g/g左右.TG-DTG试验表明ESA-Co-AA-Co-AM的起始分解温度在200℃左右.

As an abundant ocean resource, algae had the characteristic of strong revegetate and biodegradable ability. It was expected that it could be used as a new resin in material field. The purpose of this study was intended to synthesis a new polymer of Sodium alginate superabsorbent resin in material field. By polymer molecular design, a complex superabsorbent resin based on etherificated sodium alginate （ESA） was prepared. The surface configuration, thermal stability and swelling stability were studied. The results showed that the reaction of ESA, AA ＆ AM under certain condition produced the superabsorbent resin which had the property of thermal stability, higher water and saline absorbency. Following results were obtained： When ω （DCP）, ω （NMBA）, ω （ESA）, ω （AM） were 0.2%, 0.6%, 20%, 10% respectively, the absorptive capability of the polymer in deionized water and NaCl solution [ω（NaC1） = 0.9% ] was 411 g/g and 65g/g individually. The initial degradation temperature of the resin occurred was over 200℃.