Preparation and properties of an organic–inorganic composite superabsorbent based on attapulgite
Preparation and properties of an organic–inorganic composite superabsorbent based on attapulgite
复制标题
DOI：
10.1177/0021998315597551
复制
发表时间：
2016-06
影响因子：
2.9
通讯作者：
Guofu Ma;Feitian Ran;Enke Feng;Zhe Zhang;Z. Lei
中科院分区：
文献类型：
--
作者：
Guofu Ma;Feitian Ran;Enke Feng;Zhe Zhang;Z. Lei
以过硫酸铵（APS）为引发剂，N，N-亚甲基双丙烯酰胺（MBA）为交联剂，通过部分中和的丙烯酸（AA）、聚乙烯醇（PVA）和仲胺（APT）在水溶液中进行接枝共聚，制备了一种新型、低成本、环境友好的有机-无机复合高吸水性树脂。采用红外光谱、X射线衍射、场发射扫描电子显微镜和透射电子显微镜对复合高吸水性树脂的结构和形态进行了表征。研究了APT含量对复合高吸水性树脂吸水倍率的影响，离子型表面活性剂和不同盐溶液对复合高吸水性树脂溶胀性能的影响，以及pH值对复合高吸水性树脂溶胀性能的影响。结果表明，该复合高吸水性树脂在蒸馏水和0.9wt%NaCl溶液中的吸水率分别为680 g/g和53 g/g，在pH 4-10范围内吸水倍率均较高，在阴离子表面活性剂中的溶胀能力高于阳离子表面活性剂，在现代农业和园艺中具有潜在的应用前景。另一方面，复合高吸水性材料可用于去除多价金属离子。
A novel, low-cost, and eco-friendly organic–inorganic composite superabsorbent is successfully prepared in aqueous solution by graft copolymerization of partially neutralized acrylic acid (AA), polyvinyl alcohol (PVA), and attapulgite (APT) using ammonium persulfate (APS) as an initiator and N,N-methylenebisacrylamide (MBA) as a crosslinker. The structure and morphology of the composite superabsorbent are characterized by means of Fourier transform infrared, X-ray diffraction, field-emission scanning electron microscopy, and transmission electron microscopy. The effects of APT content which can affect the water absorbency and the pH, ionic surfactants and different saline solution which can affect swelling capabilities of the composite superabsorbent are also investigated. The results show the composite superabsorbent give the best absorption up to 680 g/g and 53 g/g in distilled water and 0.9 wt% NaCl solution, high water absorbency over a wide pH range of 4–10, high swelling capacity in anionic surfactant than that of cationic solution, which makes it promising for potential applications in modern agriculture and horticulture. On the other hand, the composite superabsorbent can be used for removing multivalent metal ions.