Synthesis of hydrophobic fluorinated polyurethanes and their properties of resistance to cavitation and wear

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• 作者：Rui-Zhu Zhang ; Yang-Yang Ren ; ^{1171299563@qq.com} ; Da-Kao Yan ; Peng-Yan Guo ; Lin-Jie Li
• 关键词：Fluorinated polyurethanes ; Organic fluorine film ; Flow components ; Hydrophobic ; Resistance to cavitation and wear
• 刊名：Progress in Organic Coatings
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：104
• 期：Complete
• 页码：11-19
• 全文大小：3700 K
• 卷排序：104

文摘

FPU without hydrophilic CH2OH groups were prepared by introducing fluorine with the method of TEOH-10 for modification of MDI and regulating the dosage and time of the MDI added. There was organic fluorine membrane which was equivalent to the hydrophobic effect of the lotus leaf on the surface of FPU. Comprehensive consideration of water conservancy and hydropower engineering application requirements of underwater protective coating, when the molar ratio of TEOH-10 versus MDI was about 0.5, the cavitation erosion amount of FPU reduced from 2.3756 × 10−3 kg to 0.9334 × 10−3 kg, and the cohesive pressure of FPU stayed over 10 MPa, which can be used as protective coating of flow components under water.