Abstract:

The hydrotalcite (HT) synthesized with urea method was used to prepare intercalated HT (SMAS-HT) by using methyl allyl sulfonate (SMAS) as an intercalation agent.A novel poly (acrylic acid-co-acrylamide)/HT nanocomposite superabsorbent was prepared by inverse polymerization, using N,N′-methylenebisacrylamide (NMBA) as a crosslinking agent and potassium persulfate (KPS) as an initiator.The structure and morphology were characterized by FTIR, XRD and SEM.The influences of the amount of SMAS-HT on the water (salt) absorbency were studied.The results showed that the intercalation was successful and SMAS-HT was completely exfoliated after polymerization.Adding a small amount of SMAS-HT could effectively improve the water (salt) absorbency of nanocomposite superabsorbents.The nanocomposite superabsorbents had their highest water (salt) absorbency when the content of SMAS-HT was 3.0%(mass).

Key words:

水滑石, 纳米复合材料, 高吸水性树脂

摘要：

首先用尿素法合成了水滑石(HT)，然后用甲基丙烯磺酸钠(SMAS)对水滑石进行插层，得到了插层的水滑石(SMAS-HT)，最后通过反相悬浮聚合制备了一种新型的聚(丙烯酸-丙烯酰胺)/水滑石纳米复合高吸水性树脂，其中N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂，过硫酸钾(KPS)为引发剂。通过傅里叶变换红外光谱(FTIR)、X-射线衍射(XRD)及扫描电镜(SEM)等手段表征其结构和形貌。考察了SMAS-HT的含量对其吸水(盐)性能的影响。结果表明，插入SMAS的水滑石片层在聚合后发生了剥离，添加少量的SMAS-HT可以明显提高树脂的吸水(盐)性能，当SMAS-HT含量为3.0%（质量）时，树脂的吸(盐)水性能达到最大。

关键词:

水滑石, 纳米复合材料, 高吸水性树脂