Dispersion Stability of Sepiolite Mineral Nanofibers in Water

作者：Chen, Cong; Wang, Fei^*; Liang, Jinsheng; Tang, Qingguo; Liu, Haifeng; Liu, Huimin

来源：Nanoscience and Nanotechnology Letters, 2014, 6(4): 301-308.

DOI：10.1166/nnl.2014.1759

• Sepiolite Nanofibers
• Surface Modification
• Surface Free Energy
• Transmittance
• Dispersion Stability

The surface modification reactions on sepiolite have been carried out to prepare modified sepiolite nanofibers using gamma-(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 gamma-(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.

• 出版日期2014-4
• 单位河北工业大学