Dispersion Stability of Sepiolite Mineral Nanofibers in Water
The surface modification reactions on sepiolite have been carried out to prepare modified sepiolite nanofibers using γ-(2,3-epoxypropoxy)propytrimethoxysilane, and the dispersion stability of sepiolite nanofibers in water has been systematically studied. The results showed that the dispersion stability of modified sepiolite nanofibers was improved significantly. When the amount of γ-(2,3-epoxypropoxy)propytrimethoxysilane in sepiolite nanofibers is 1.63%, the stability of sepiolite nanofibers dispersion reaches the best. The reason was that the surface modification on sepiolite increased zeta potential and decreased surface free energy, which leads to the increase of repulsive energy between nanofibers and the degradation of attractive energy, respectively. The interaction between repulsive and attractive energy results in the increase of energy barrier which overcomes agglomeration and sedimentation of sepiolite nanofibers.
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Document Type: Short Communication
Publication date: April 1, 2014
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- Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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