| Adsorption and stabilization of nano-TiO2 particles in a concentrated dispersion |
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| 作者姓名： | Fuchun Liu En-Hou Han Wei Ke |
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| 作者单位： | State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences |
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| 基金项目： | the National Key Technology R&D Program (Grant nos.2007BAB27B02-02,2009BAE70B02 and 2012BAB15B00) for supporting these studies |
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| 摘 要： | The quantitative adsorption behavior of a hyperdispersant onto nano-TiO2 particles has been characterized by using FTIR(Fourier transform infrared) spectroscopy,NMR(nuclear magnetic resonance) and a negative adsorption method.The intrinsic adsorbed amount of hyperdispersant was(1.05±0.09) mg/m2.Thickness of the adsorbed layer was(4.66±0.42) nm.There was(74±7)% wt water in the adsorbed layer.In the hyperdispersant molecule,the anchoring group of the amide group attached frmly to the nano-TiO2 particles,and the solvatable chains of comb-type structure exhibited the effective steric stabilization.
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| 关 键 词： | Hyperdispersant Nanopowder Anchoring Steric |
| 收稿时间： | 8 November 2012 |
Adsorption and stabilization of nano-TiO 2
particles in a concentrated dispersion |
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| Fuchun Liu,En-Hou Han,Wei Ke.Adsorption and stabilization of nano-TiO2 particles in a concentrated dispersion[J].Progress in Natural Science,2013,23(5):464-468. |
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| Authors: | Fuchun Liu En-Hou Han and Wei Ke |
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| Institution: | State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110017, China;State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110018, China |
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| Abstract: | The quantitative adsorption behavior of a hyperdispersant onto nano-TiO2
particles has been characterized by using FTIR (Fourier transform infrared) spectroscopy, NMR (nuclear magnetic resonance) and a negative adsorption method. The intrinsic adsorbed amount of hyperdispersant was (1.057 0.09) mg/m2. Thickness of the adsorbed layer was (4.6670.42) nm. There was (74 77)% wt water in the adsorbed layer. In the hyperdispersant molecule, the anchor ing group of the amide group attached firmly to the nano-TiO2 particles, and the solvatable chains of comb-type structure exhibited the effective steric stabilization. |
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| Keywords: | Hyperdispersant Nanopowder Anchoring Steric |
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