Effective activation of halloysite nanotubes by piranha solution for amine modification via silane coupling chemistry
文献类型：期刊论文
| 作者 | Sun, Pan1; Liu, Guoming1; Lv, Dong2; Dong, Xia1; Wu, Jingshen2; Wang, Dujin1 |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2015 |
| 卷号 | 5期号:65页码:52916-52925 |
| 英文摘要 | The present work reports a novel modification methodology for halloysite nanotubes (HNTs) that includes two successive steps, i.e., activation by piranha solution and silanization reaction. A commercial silane coupling agent, 3-aminopropyltriethoxysilane (APS), was selected to modify the surface of HNTs. The presence of APS moieties on the HNT surface was characterized by the combination of Fourier transform infrared (FTIR) spectroscopy, thermogravimetry (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM) and nitrogen sorption. For the coupling reaction, the effect of reaction time, temperature, rehydration and APS concentration on the course of silanization degree was carefully investigated. The mechanism and the grafted product structure of the reaction between activated HNTs and APS were revealed through Si-29 solid-state NMR spectroscopy and XPS analysis. The result shows that piranha solution is an effective activation agent for silanization of HNTs. A higher reaction temperature (120 degrees C) contributed to a higher grafted amount compared with a lower temperature (70 degrees C). Moisture led to a higher degree of silanization. The grafted amount increased with APS concentration and leveled off at about 1%. Further increase in the APS concentration only led to a drastic decrease in grafting yield. The grafting reaction was confirmed by the presence of tridentate (T-3) and bidentate (T-2) bonded Si in Si-29 NMR. Free terminal amino groups and protonated amine groups were identified in modified HNTs by XPS. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2015-11-02 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/27982]  |
| 专题 | 化学研究所_工程塑料实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Hong Kong, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Pan,Liu, Guoming,Lv, Dong,et al. Effective activation of halloysite nanotubes by piranha solution for amine modification via silane coupling chemistry[J]. RSC ADVANCES,2015,5(65):52916-52925. |
| APA | Sun, Pan,Liu, Guoming,Lv, Dong,Dong, Xia,Wu, Jingshen,&Wang, Dujin.(2015).Effective activation of halloysite nanotubes by piranha solution for amine modification via silane coupling chemistry.RSC ADVANCES,5(65),52916-52925. |
| MLA | Sun, Pan,et al."Effective activation of halloysite nanotubes by piranha solution for amine modification via silane coupling chemistry".RSC ADVANCES 5.65(2015):52916-52925. |
入库方式： OAI收割
来源：化学研究所
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