黄原胶辐射接枝丙烯酸及其耐盐性研究

以60Coγ为辐射源,对黄原胶(XG)和丙烯酸(AA)进行共辐射制备黄原胶/丙烯酸接枝共聚物(XG-g-PAA)。研究了合成条件对产品接枝性及吸水性的影响,并和化学引发得到的接枝物的吸水性及耐盐性进行了比较,用红外光谱及电镜扫描对产品结构进行了表征。结果表明,产品接枝率为130.8%,接枝效率为82.4%,吸去离子水率为815 g/g。它在去离子水、人工尿及质量分数均为0.9%的NaCl水溶液、BaCl2水溶液、FeCl3水溶液、Na2SO4水溶液、尿素水溶液中的吸水率,较经化学引发得到的接枝物分别提高了45.3%、27.3%、20.6%、16.7%、10.2%、20.7%、44.9%。SEM表明,辐射引发较化学引发更易得到多孔疏松的产品,该产品是农用保水剂及卫生用品的良好候选材料。

Grafting of Acrylic Acid onto Xanthan Gum by 60Co Irradiation and Its Resistance to Salt

XG-g-PAA was prepared through 60Co γ-irradiation.Effects of synthesis conditions on grafting properties and swelling capability were investigated.The swelling capability and resistibility to salt of the product were compared with polymer grafted by chemical initiator.Its structure were analyzed by IR and SEM.The results showed that the graft ratio,graft efficiency and swelling ratio of the product were 130.8%,82.4% and 815 g/g respectively.Compared with polymer grafted by initiator,the swelling ratio of the product in water,artificial urethra,aqueous solutions of 0.9% NaCl,0.9% BaCl2,0.9% FeCl3,0.9% Na2SO4 and 0.9% urea increased by 45.3%,27.3%,20.6%,16.7%,10.2%,20.7% and 44.9% respectively.SEM indicated that it is much easier to obtain porous products through 60Co γ-irradiation than with initiator.The product is a promising candidate for application such as agriculture superabsorbent polymer and sanitary accessories.