反相悬浮法合成高耐盐性的超强吸水剂  

Synthesis of Superabsorbent with High Absorbability in Saline

作　　者：陈密峰[1] 张秀娟[1] 杨健茂[1] 魏献军[1] 

机构地区：[1]河南师范大学化学与环境科学学院河南省高等学校环境科学与工程重点实验室,河南新乡453002

出　　处：《精细化工》2002年第9期544-547,共4页Fine Chemicals

摘　　要：以多元醇为交联剂、烷基磷酸钠 -司盘 (NP -SP)为复合悬浮稳定剂、丙烯酸 (AA)为单体、过硫酸铵 (APS)为引发剂、环己烷为分散介质 ,采用反相悬浮法合成耐盐性聚丙烯酸钠超强吸水剂。研究了交联剂类型和用量 ,悬浮稳定剂类型、用量和质量比 ,引发剂浓度 ,单体中和度(丙烯酸钠占单体总量的摩尔分数 ) ,聚合温度等对产品物理性状、耐盐性及体系稳定性的影响。当 ρ(多元醇 ) =0 5 3g/L、ρ(NP -SP) =0 0 0 8～ 0 0 1g/mL、m(SP)∶m(NP) =(2 3～ 4 0 )∶1 0、c(APS) =40 5mmol/L、单体中和度x(丙烯酸钠 ) =79 2 %、聚合温度 70～ 76℃时 ,体系稳定 ,产品成球性好 ,吸盐水 (生理盐水 )率 199mL/ g ,吸水 (蒸馏水 )率 86 4mL/ g ,耐盐性高于其他交联剂交联型产品。A superabsorbent of poly(sodium acrylate) was prepared by inverse suspension polymerization with polyhydric alcohol as crosslinking agent,NP-SP(sodium alkyl phosphate-Span) as multiplex suspension stabilizer,AA(acrylic acid)as monomer,APS(ammonium persulphate) as initiator and cyclohexane as continuous phase.The parameters which affect the physical properties and absorbability in normal saline of the product and stability of the system were studied,such as the type and mass concentration of crosslinker,the type,mass concentration and mass ratio of stabilizer,the concentration of initiator,the neutralization degree of monomer (mol percent of neutralized AA in monomer) and the reaction temperature.When ρ(crosslinker)=0.53 g/L,ρ(NP-SP)=0.008-0.01 g/mL,m(SP)∶m(NP)=(2.3-4.0)∶1.0,c(APS) =40.5 mmol/L,neutralization degree of monomer x(sodium acrylate)=79.2%,and polymerization temperature was 70-76 ℃,the polymerization system was stable,the product was of proper particles,and the absorbabilities in normal saline and distilled water were 199 mL/g and 864 mL/g respectively.This resin is superior to other crosslinked products in absorbability in normal saline.

关 键 词：聚丙烯酸钠 反相悬浮 耐盐性 超强吸水剂 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业] TQ316.335