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Preparation and properties of waterborne cationic fluorinated polyurethane

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Abstract

Waterborne cationic fluorinated polyurethane (WCFPU) micro-emulsion was prepared by the reaction of isophorone diisocyanate (IPDI), polytetramethyleneether glycol (PTMG1000), 1,4-butanediol (BDO), N-methyldiethanolamine (MDEA), trimethylolpropane (TMP) and perfluoroalkylethyl octanol (FEOH), and then the films of the WCFPU were prepared. The influence on the mechanical properties and water absorption of the films, such as the molar ratio of NCO to OH, the dosage of MDEA, TMP and FEOH, was investigated. Their structure, morphology and heat performance were characterized by fourier transform infared spectrometer (FT-IR), dynamic light scattering (DLS), transmission electron microscope (TEM), X-ray diffraction (XRD), differential scanning calorimeter (DSC) and thermogravimetry (TG). The results revealed that the best mechanical properties and water resistance could be obtained under the condition that NCO/OH molar ratio was 1.25, w(TMP) was 1.1%, w(MDEA) was 7.29% and w(FEOH) was 22.3%. In addition, WCFPU was endowed with low surface energy of its film and the membrane surfaces had excellent water and oil repellency. Furthermore, the thermal stability of the waterborne cationic fluorinated polyurethane increased with the incorporation of perfluoroalkyl chain. And XRD, DSC and TG showed that micro-crystallinity of polyurethane increased with the increase of FEOH, which was benefit to the micro-phase seperation.

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Acknowledgements

We would like to express our great thanks to the National Natural Science Foundation of China (grant number: 20876093 and 50973057), the education department special foundation of Shaanxi Province (2010JK436) and Scientific Research Fund of Shaanxi University of Science and Technology (BJ11-10) for financial support.

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Authors and Affiliations

  1. Key laboratory of Auxiliary Chemistry & technology for Chemical Industry, Ministry of Education, Shaanxi university of Science & technology, Xi’an Shaanxi, 710021, China

    Peizhi Li, Yiding Shen, Xiaowu Yang & Ganghui Li

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  1. Peizhi Li
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  2. Yiding Shen
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  3. Xiaowu Yang
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  4. Ganghui Li
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Correspondence to Peizhi Li.

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Li, P., Shen, Y., Yang, X. et al. Preparation and properties of waterborne cationic fluorinated polyurethane. J Polym Res 19, 9786 (2012). https://doi.org/10.1007/s10965-011-9786-0

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  • DOI: https://doi.org/10.1007/s10965-011-9786-0

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