Synthesis of montmorillonite / poly ( acryl ic acid) super absorbent resin
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摘要: 用烷基季铵盐对钠基蒙脱土进行插层处理, 使其成为有机蒙脱土(OMMT) , 采用插层法制备蒙脱土/ 聚丙烯酸高吸水性树脂。通过傅立叶变换红外( FTIR) 和X 射线衍射(XRD) 等手段表征其结构。研究了有机蒙脱土、引发剂、交联剂用量以及材料粒径对复合材料吸(盐) 水率的影响。结果表明, 通过插层可使丙烯酸插入蒙脱土片层中发生聚合, 使蒙脱土片层剥离, 达到纳米级分散。所制备树脂的吸水率较聚丙烯酸树脂有很大提高, 其吸蒸馏水和生理盐水( wNaCl = 0. 009) 能力分别达到1200 g·g-1和121 g·g-1 。Abstract: Alkylammonium ion was used to dispose sodium type montmorillonite (Na-MMT) to prepare organicmontmorillonite (OMMT) . Montmorillonite/ poly(acrylic acid) (MMT/ PAA) nanocomposites were synthesized bythe method of intercalation. The st ructure of the nanocomposite was characterized by FTIR and X-ray diff raction.The effect s of the amount of OMMT , initiator , crosslinker and size of nanocomposites on the absorbency of nanocomposites were investigated. The result s show that the intercalation is successful. Montmorillonite disperses in copolymer molecules at nano size af ter copolymerization and the absorbency of the nanocomposite is much higher thanthat of the pure PAA. The highest absorbencies of nanocomposites for distilled water and saline water are 1200 g·g-1and 121 g·g -1 , respectively.
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Keywords:
- organic-montmorillonite /
- intercalation /
- poly(acrylic acid) /
- nanocomposites /
- modification
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