Preparation and swelling characteristics of a superabsorbent nanocomposite based on natural guar gum and cation-modified vermiculite
文献类型：期刊论文
| 作者 | Wang AQ(王爱勤) ; Wang WB(王文波)
|
| 刊名 | Journal of Applied Polymer Science
 |
| 出版日期 | 2011 |
| 卷号 | 119期号:6页码:3675-3686 |
| 关键词 | guar gum vermiculite superabsorbent nanocomposite pH-sensitive swelling |
| ISSN号 | 0021-8995 |
| 通讯作者 | 王爱勤 aqwang@licp.cas.cn |
| 中文摘要 | A series of novel superabsorbent nanocomposites were prepared by the solution radical polymerization of natural guar gum (GG), partially neutralized acrylic acid [sodium acrylate (NaA)], and cationexchanged vermiculite (Mn+-VMT) with ammonium persulfate as the initiator in the presence of the crosslinking agent N,N'-methylene-bis-acrylamide. Fourier transform infrared analysis revealed that NaA was grafted onto the GG chains and that Mn+-VMT participated in the polymerization. X-ray diffraction results showed that the occurrence of the cation-exchange process changed the interlayer gap of vermiculite (VMT) and that M Mn+ –VMT was exfoliated during polymerization to form a nanocomposite. The exfoliated VMT led to better dispersion in the GG-g-poly(sodium acrylate) matrix, as shown by scanning electron microscopy and transmission electron microscopy analysis. Mn+-VMT improved the water absorption of the nanocomposite more remarkably than raw VMT, and Al3+ -VMT enhanced the water absorption to the highest degree. The nanocomposite exhibited intriguing overshooting swelling characteristics in a multivalent saline solution and acidic pH solution and showed switching pH-responsive behaviors in buffer solutions between pH 2 and pH 7.2. |
| 学科主题 | 功能高分子 |
| 收录类别 | SCI |
| 资助信息 | 科技部863项目(2006AA03Z0454,2006AA100215) |
| 语种 | 英语 |
| WOS记录号 | WOS:000285312800066 |
| 公开日期 | 2012-08-30 |
| 源URL | [http://210.77.64.217/handle/362003/70]  |
| 专题 | 兰州化学物理研究所_环境材料与生态化学研究发展中心 |
| 推荐引用方式 GB/T 7714 | Wang AQ,Wang WB. Preparation and swelling characteristics of a superabsorbent nanocomposite based on natural guar gum and cation-modified vermiculite[J]. Journal of Applied Polymer Science,2011,119(6):3675-3686. |
| APA | 王爱勤,&王文波.(2011).Preparation and swelling characteristics of a superabsorbent nanocomposite based on natural guar gum and cation-modified vermiculite.Journal of Applied Polymer Science,119(6),3675-3686. |
| MLA | 王爱勤,et al."Preparation and swelling characteristics of a superabsorbent nanocomposite based on natural guar gum and cation-modified vermiculite".Journal of Applied Polymer Science 119.6(2011):3675-3686. |
入库方式： OAI收割
来源：兰州化学物理研究所
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