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Novel titration method for surface-functionalised silica

Novel titration method for surface-functionalised silica,10.1016/j.apsusc.2010.10.025,Applied Surface Science,Kai Hofen,Siegfried Weber,Chiu Ping Cand

Novel titration method for surface-functionalised silica   (Citations: 2)
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This paper describes three inexpensive and fast analytical methods to characterise grafted particle surfaces. The reaction of silica with (3-aminopropyl)triethoxysilane, (3-mercaptopropyl)trimethoxysilane and N-(phosphonomethyl)iminodiacetic acid hydrate, respectively, leads to NH2-, SO3H- or COOH-functionalised silica, which were characterised by X-ray photoelectron spectrometry and titration in nonaqueous media as well as with two titration methods in a water-based environment. In the work presented, factors influencing the titrations are pointed out and solutions are presented to overcome these limiting factors are shown.
Journal: Applied Surface Science - APPL SURF SCI , vol. 257, no. 7, pp. 2576-2580, 2011
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