马铃薯淀粉高吸水性树脂的合成及性能研究

为优化马铃薯淀粉高吸水性树脂的合成工艺,采用水溶液聚合法进行接枝共聚制备高吸水性树脂,并对其性能进行研究.结果表明：当马铃薯淀粉与单体（g/mL）比例为1：7,丙烯酸与丙烯酰胺摩尔比为0.5：1,丙烯酸中和度为70％,反应温度60℃,引发剂、交联剂用量分别为单体的0.25 wt％,0.6 wt％,交联时间为1.5h.此条件下合成的高吸水性树脂吸蒸馏水倍率达到786 g/g,吸0.9％ NaCl倍率达到76.1g/g,且吸水速率较快.对人工血、人工尿及一价阳离子溶液有较好的吸收率；热稳定性较好,保水能力强,在室温条件下保水能力在7d左右；在30、40、50、60℃条件下保水能力均优于科翰98保水剂,但耐酸性较差,在中性偏碱的条件下具有很好的吸水倍率.

Synthesis and property of superabsorbent polymer with potato starch

In order to optimize the synthesis conditions of super absorbent polymer（SAP） with pota- to starch, it was prepared by aqueous solution polymerization method, and its properties were stud- ied. The results are as follows, when mass ratios of starch to monomer is 1 ： 7, mole ratio AA to AM is 0. 5： 1, degree of neutralization is 70%, reaction temperature is 60 ℃, the amounts of initiator, crosslinking agent are 0. 25% and 0. 6% ,cross - linking time is 1.5 h, the absorption of distil water by super absorbent polymer is 786 g/g,and absorption power in 0. 9% NaCl is 76. 1 g/g at a faster rate of water absorption. The absorption rate of the artificial blood, the artificial urine and price posi- tive ion solution were better. The SAP had good thermal stability and strong water retention ability, the water retaining capacity were 7 days. It displayed better water retaining capacity than Kehan 98 SAP at 30 ℃ ,40 ℃ ,50 ℃ and 60℃. The acid resistance was bad,but had very good water absorb- ency under the neutral weak alkali condition.