多元醇为交联剂制备AA/AMPS耐盐性高吸水性树脂

Synthesis of AA/AMPS super absorbent resin with salt-resistance by using polyhydric alcohols as cross-linking agent

以丙烯酸(AA)和2-丙烯酰胺-2-甲基丙磺酸(AMPS)为单体,环己烷为油相,过硫酸铵为引发剂,采用反相悬浮聚合法制备耐盐性高吸水树脂。研究了单体物料比,交联剂种类及用量,水油比以及不同分散剂种类及配比对吸水树脂吸水率及耐盐率的影响,并通过扫描电子显微镜及傅里叶变换红外光谱对树脂结构进行表征。结果表明:m(AMPS)∶m(AA)为1.0∶10.0,中和度为75%,交联剂甘露醇用量(占单体质量)为6%,水油比为1.0∶3.0,分散剂span60用量(占单体质量)为8.0%,过硫酸铵用量(占单体质量)为0.5%时,制备的耐盐性高吸水树脂的吸水率和吸盐率最高,分别达到1 705,133 m L/g。耐盐性高吸水树脂表面光滑,结构疏松。

Super absorbent resin with salt-resistance was prepared via inverse suspension polymerization with acrylic acid（AA）and 2-acrylic amide-2-methyl propene sulfonic acid（AMPS）as monomers,cyclohexane as oil phase,and ammonium persulfate as initiator. The effects of the proportion of the monomers, types and dosage of the cross-linking agents,water-oil ratio,types and ratio of dispersants on the water absorption and salt tolerance of the water absorbent resin were explored. The results indicate that the water absorbent resin with salt-resistance has the highest water absorption and salt absorption,which is 1 705,133 m L/g respectively when the mass ratio of AMPA to AA is 1.0∶10.0, the neutralization degree is 75%,the dosage of mannitol as a crosslinking agent is 6% of monomer mass, the ratio of water to oil is 1.0 ∶3.0,the dosage of span60 as a dispersant is 8.0% of monomer mass and the dosage of ammonium persulfate is 0.5% of monomer mass. The super absorbent resin with salt-resistance has smooth surface and osteoporosis structure.