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Preparation of waterborne polyurethane nanocomposite reinforced with halloysite nanotubes for coating applications
Author(s) -
Wu Yan,
Du Zongliang,
Wang Haibo,
Cheng Xu
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.43949
Subject(s) - materials science , polyurethane , halloysite , nanocomposite , differential scanning calorimetry , ultimate tensile strength , composite material , thermal stability , composite number , fourier transform infrared spectroscopy , thermogravimetric analysis , polymer chemistry , chemical engineering , physics , engineering , thermodynamics
To construct waterborne polyurethane with excellent water resistance and mechanical properties, an organic‐inorganic hybrid nanocomposite based on modified halloysite nanotubes (mHNTs) and polyurethane was prepared. The HNTs were modified with an amino‐silane coupling agent (KH550) and then reacted with polypropylene glycol, 2,2‐Dimethylol propionic acid, and Toluene diisocyanate to form mHNTs/PU aqueous dispersions. The structure of the siloxane functionalized mHNTs was confirmed by a Fourier transform infrared study. The PU/mHNTs composites were characterized by using differential scanning calorimetry, scanning electronic microscopy, thermal gravimetric analysis, a tensile test, particle size analysis, and a water swelling experiment. The tensile strength, Young's modulus, and elongation at the break of the composite polymer with 0.5 wt % mHNTs was shown to be significantly improved, by approximately 200%, 200%, and 30%, respectively. An excess amount of mHNTs could weaken the reinforcing effect and stability of the composite emulsion. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43949.