Novel titration method for surface-functionalised silica |
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| Authors: | Kai HofenSiegfried Weber Chiu Ping Candace ChanPeter Majewski |
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| Affiliation: | a Department of Biotechnology, University of Applied Sciences, Mannheim, Germany
b School of Advanced Manufacturing and Mechanical Engineering, Mawson Institute, University of South Australia, Mawson Lakes Blvd, Mawson Lakes 5095, Australia |
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| Abstract: | 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. |
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| Keywords: | Functionalised silica Titration |
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