聚丙烯酰胺-埃洛石复合型高吸水性树脂的制备及其吸水性能

Preparation and Water-absorbent Properties of Polyacrylamide-Halloysite Composite Superabsorbent Resin

以丙烯酰胺(AM),丙烯酸(AA)和埃洛石(AL)为原料,环己烷(CYH)为油相,Span 60为分散剂,过硫酸铵(APS)为引发剂,N,N'-亚甲基双丙烯酰胺(MBA)为交联剂,经反相悬浮聚合法制备了聚丙烯酰胺-埃洛石复合型高吸水性树脂(1ηγ-ALTa),其结构经SEM表征。考察了单体质量比η[m(AM)∶m(AA)],油水体积比γ[V(油)∶V(水)],MBA用量和ALTa用量[T为煅烧温度,a为酸化浓度]对1ηγ-ALTa吸水性能的影响。在最佳反应条件[Span 60 1.2 g,CYH 154 m L,MBA 12 mg,AM 5.0 g,η=0.5,γ=3.5,AL90015225 mg,APS 0.12 g,于70℃反应3 h]下制备的10.53.5-AL90010吸水性能最好,吸水倍率,吸盐水倍率和溶胀速率分别为1 740.34 g·g-1,246.36 g·g-1和29.0 g·min-1。

A composite superabsorbent resin（ 1γ^ηALa^T was prepared by inverse suspension polymeri- zation, using acrylamide（AM）, acrylic acid（ AA）, halloysits（AL） as materials, cyclohexane as oil phase, span 60 as dispersant, ammonium persulfate （APS） as initiator and N, N＇-methylenediacrylamide（MBA） as cross-linking agent. The structure was characterized by SEM. Effects of monomer ratio 7/[ m（AM） ： m（AA）], oil-water ratioγ[ V（oil） ： V（water） ], dosage of MBA and ALT on water-absorbent properties were investigated. The results showed that13.5^0.5-AL10^900 exhibited best water-absorbent property with water/salinity water absorbent rate of 1 740.34 g · g^-1, 246.36 g · g^-1 and swelling rate of 29.0 g · min^-1 respectively. The optimized reaction conditions of 13.5^0.5- AL10^900 were as follows： Span 601.2 g, CYH 154 mL, AM 5.0 g, η=0.5, γ=3.5, MBA 12 mg, AL15^900 225 mg, APS 0.12 g, reacted at 70 ℃ for 3 h.