High-gravity-assisted emulsification for continuous preparation of waterborne polyurethane nanodispersion with high solids content |
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| Authors: | Weihong Zhang Dan Wang Jie-Xin Wang Yuan Pu Jian-Feng Chen |
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| Affiliation: | 1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China2. Research Centre of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | In this work, we developed a continuous preparation strategy for the production of high-solids-content waterborne polyurethane (WPU) emulsions via high-gravity-assisted emulsification in a rotating packed bed (RPB) reactor. By adjusting the experimental parameters and formula, WPU emulsions with a high solids content of 55% and a low viscosity were prepared. Preliminary applications of the high-solids-content WPU as a thermally insulating material were demonstrated. RPB emulsification is an economical and environmentally friendly production strategy because of the low energy consumption, short emulsification time, and effective devolatilization. This study demonstrated an effective method for preparation of high-solids-content WPU, moving toward commercialization and industrialization. |
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| Keywords: | waterborne polyurethane rotating packed bed emulsification nanodispersion high solids content |
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