Abstract: A new St-AA-AMPS/PVA semi interpenetrating network (IPN) superabsorbent resin is synthesized via aqueous solution polymerization method with soluble starch (St) as substrate,acrylic acid (AA),2-acrylamido-2-methylpropanesulfonic acid (AMPS) and polyvinyl alcohol (PVA) as main raw materials,potassium persulfate (KPS) as initiator and N,N-methylenebisacrylamide (NMBA) as cross-linking agent.The optimum conditions for synthetic reaction are as follows:the neutralization degree of acrylic acid is 60%,the polymerization temperature is at 70℃ and w(AA):w(St):w(PVA):w(KPS):w(NMBA):w(AMPS)=100%:10.67%:9.33%:0.67%:0.05%:33.33%.Under the optimum conditions,the prepared resin sample can reach an absorb rate of 1,214 g·g-1 against distilled water and 116 g·g-1 against normal saline.The structure and morphology of samples are characterized by infrared spectrum (IR) and scanning electron microscopy (SEM).Their swelling behavior in salt water is studied,showing that the scattering and swelling process of the resins meets the second-order dynamic model.
王海坤, 邱祖民, 熊凌亨, 杨统林, 宁峰, 亢敏霞. St-AA-AMPS/PVA半互穿网络树脂的合成及性能[J]. 现代化工, 2018, 38(8): 108-111,113.
WANG Hai-kun, QIU Zu-min, XIONG Ling-heng, YANG Tong-lin, NING Feng, KANG Min-xia. Preparation and properties of St-AA-AMPS/PVA semi-IPN superabsorbent resin. Modern Chemical Industry, 2018, 38(8): 108-111,113.