1. Molecular Grafting of Fluorinated and Nonfluorinated Alkylsiloxanes on Various Ceramic Membrane Surfaces for the Removal of Volatile Organic Compounds Applying Vacuum Membrane Distillation
- Author
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Wojciech Kujawski, Samer Al-Gharabli, Katarzyna Knozowska, and Joanna Kujawa
- Subjects
Materials science ,02 engineering and technology ,Tribology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Membrane distillation ,Grafting ,01 natural sciences ,0104 chemical sciences ,Contact angle ,Ceramic membrane ,Membrane ,Chemical engineering ,visual_art ,visual_art.visual_art_medium ,Surface modification ,Organic chemistry ,General Materials Science ,Ceramic ,0210 nano-technology - Abstract
Four main tasks were presented: (i) ceramic membrane functionalization (TiO2 5 kDa and 300 kDa), (ii) extended material characterization (physicochemistry and tribology) of pristine and modified ceramic samples, (iii) evaluation of chemical and mechanical stability, and finally (iv) assessment of membrane efficiency in vacuum membrane distillation applied for volatile organic compounds (VOCs) removal from water. Highly efficient molecular grafting with four types of perfluoroalkylsilanes and one nonfluorinated agent was developed. Materials with controllable tribological and physicochemical properties were achieved. The most meaningful finding is associated with the applicability of fluorinated and nonfluorinated grafting agents. The results of contact angle, hysteresis of contact angle, sliding angle, and critical surface tension as well as Young’s modulus, nanohardness, and adhesion force for grafting by these two modifiers are comparable. This provides insight into the potential applicability of enviro...
- Published
- 2017
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