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Functionalization of Halloysite Clay Nanotubes by Grafting with γ-Aminopropyltriethoxysilane
Abstract
Surface modification of natural halloysite clay nanotubes with γ-aminopropyltriethoxysilane (APTES) was investigated. Untreated and modified samples were characterized by nitrogen adsorption, X-ray diffraction, elemental analysis, thermogravimetry, transmission electron microscopy, atomic force microscopy, MAS nuclear magnetic resonance ( 29 Si, 13 C, 29 Al), and Fourier transform infrared spectroscopy. The modification mechanism was found to include not only the direct grafting of APTES onto the hydroxyl groups of the internal walls, edges and external surfaces of the nanotubes but other processes in which oligomerized APTES condensed with the directly grafted APTES to form a cross-linked structure. The thermal and evacuation pretreatment conditions were found to play an important role in controlling the extent and mechanism of the modification. The extent of modification is also strongly affected by the morphological parameters of the original clay samples. This study demonstrates that the surface chemistry of halloysite nanotubes is readily modified, enabling applications in nanocomposites, enzyme immobilization and controlled release.
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Citations
Cited by
Zhang, T., Wang, W., Zhao, Y., Bai, H., Wen, T., Kang, S., Song, G., Song, S., & Komarneni, S. (2021) · Chemical Engineering Journal · doi:10.1016/j.cej.2020.127574 · Cited by 513
Yah, W. O., Takahara, A., & Lvov, Y. M. (2012) · Journal of the American Chemical Society · doi:10.1021/ja210258y · Cited by 429
Chitosan-halloysite Nanotubes Nanocomposite Scaffolds for Tissue Engineering
Liu, M., Wu, C., Jiao, Y., Xiong, S., & Zhou, C. (2013) · Journal of Materials Chemistry B · doi:10.1039/c3tb20084a · Cited by 365
The Stability of Halloysite Nanotubes in Acidic and Alkaline Aqueous Suspensions
White, R. D., Bavykin, D. V., & Walsh, F. C. (2012) · Nanotechnology · doi:10.1088/0957-4484/23/6/065705 · Cited by 185
In Vitro evaluation of Alginate/halloysite Nanotube Composite Scaffolds for Tissue Engineering
Liu, M., Dai, L., Shi, H., Xiong, S., & Zhou, C. (2015) · Materials Science and Engineering: C · doi:10.1016/j.msec.2015.01.037 · Cited by 176
Metadata
- Authors
- Yuan, P., Southon, P. D., Liu, Z., Green, M. E. R., Hook, J. M., Antill, S. J., & Kepert, C. J.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-09-12
- Volume
- 112
- Issue
- 40
- Pages
- 15742-15751
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W1972428480
- Cited by
- 962
- References
- 0
- FWCI
- 4.79
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yuan, P., Southon, P. D., Liu, Z., Green, M. E. R., Hook, J. M., Antill, S. J., & Kepert, C. J. (2008). Functionalization of Halloysite Clay Nanotubes by Grafting with γ-Aminopropyltriethoxysilane. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp805657t
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