论文部分内容阅读
以马铃薯淀粉为原料,丙烯酸为接枝单体,过硫酸钾为引发剂,三氯化铝为交联剂,合成了淀粉接枝丙烯酸高吸水性树脂,并对产物进行性能测试和红外、紫外可见光谱的结构表征。考察了影响产物吸水性能的5个合成条件,在反应温度65℃,3 mLw(K2S2O8)=1%水溶液,2 mLw(AlCl3)=1%水溶液,m(淀粉)∶m(丙烯酸)=1∶6,单体中和度70%时,树脂达到最高的吸去离子水倍数1 440 g/g。产物粉末2 min可达到饱和吸水率的50%,凝胶能有效延长水分蒸发时间,吸自来水率达到560 g/g,具有良好的工农业和市场应用前景。
Starch grafted acrylic acid superabsorbent was synthesized by using potato starch as raw material, acrylic acid as grafting monomer, potassium persulfate as initiator and aluminum trichloride as cross-linking agent. The properties of the product were tested and analyzed by infrared and ultraviolet Structural characterization of visible spectrum. Five synthetic conditions affecting the water absorption of the product were investigated. The reaction conditions were as follows: temperature of 65 ℃, aqueous solution of 3 mLw (K2S2O8) = 1%, aqueous solution of 2 mLw (AlCl3) = 1% 6, the degree of monomer neutralization 70%, the resin to achieve maximum absorption of deionized water multiples of 1 440 g / g. The product powder can reach 50% of the saturated water absorption in 2 min. The gel can effectively prolong the evaporation time of water and the tap water rate reaches 560 g / g, which has good industrial, agricultural and market application prospects.