Aggregation and Stabilization of Carboxylic Acid Functionalized Halloysite Nanotubes (HNT-COOH)
- Title
- Aggregation and Stabilization of Carboxylic Acid Functionalized Halloysite Nanotubes (HNT-COOH)
- Author
- 손대원
- Keywords
- CLAY NANOTUBES; MECHANICAL-PROPERTIES; NATURAL HALLOYSITE; CONTROLLED-RELEASE; NANOCOMPOSITES; COMPOSITES; MINERALS; SIO2
- Issue Date
- 2012-08
- Publisher
- AMERICAN CHEMICAL SOCIETY
- Citation
- The Journal of Physical Chemistry Part C,Vol.116,No.34 [2012],p18230-18235
- Abstract
- We modified the functional groups of holloysite nanotubes (HNT) from hydr 000016A0 oxyl groups (HNT-OH) to carboxylic acids (HNT-COOH). Aggregation and dispersion properties of HNT-COOH under dry conditions were probed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Moreover, the degree of aggregation and dispersion of HNT-COOH in acidic, basic, and neutral solutions were measured by multiple angle polarized dynamic light scattering (MA-DLS). HNT-COOH formed aggregates in neutral solution; however, the material was dispersed in basic and acidic solutions. This occurrence is due to hydrogen bonds (HB) between the carboxyl groups of HNT-COOH in neutral solution, which decrease in acidic and basic solution due to charge dispersion.
- URI
- http://pubs.acs.org/doi/10.1021/jp3038945http://hdl.handle.net/20.500.11754/41361
- ISSN
- 1932-7447
- DOI
- 10.1021/jp3038945
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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