Journal
JOURNAL OF CLEANER PRODUCTION
Volume 241, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2019.118341
Keywords
Tung oil; Bio-based polyol; Waterborne polyurethanes; Cured films; Antibacterial activity; Eco-friendly coating
Categories
Funding
- National Natural Science Foundation of China [51673075, 21808070]
- Natural Science Foundation of Guangdong Province [2018A030310349]
- Science & Technology Program of Guangzhou City [201803030003, 201704030085]
- Key Laboratory of Polymeric Composite & Functional Materials of Ministry of Education [PCFM201608]
- Research Fund Program of Guangdong Provincial Key Lab of Green Chemical Product Technology [GC201813]
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Bio-based waterborne polyurethanes (WPUs) as a novel kind of economic and eco-friendly coating have attracted more attention in recent decades due to their sustainability, availability, and low toxicity advantages. In this work, a tung oil based polyol (TOP) is effectively fabricated without complicated purification process under a relative low reaction temperature, and subsequently used to prepare a series of cationic waterborne polyurethane dispersions (WPUDs) with different TOP contents. The effect of TOP content on the particle size, zeta potential and storage stability of WPUDs is detailly investigated by zeta-sizer and centrifugation measurement. The post-curing behavior of these cured films is tested by tracing the gel content. Thereafter, the WPUDs coating properties including mechanical properties, thermal resistance, hydrophobicity, morphology, pencil hardness, adhesion and solvent resistance are also carefully investigated which demonstrate that more introduction of TOP into the dispersions may help improve tensile strength, thermal stability, hydrophobic capability, phase compatibility, pencil hardness for the cured films. More importantly, antibacterial experiments demonstrate that these WPUDs dispersions exhibit well inhibition effect toward Escherichia coli and Staphylococcus aureus. This study may provide a reference for developing highly effective, renewable, multifunctional and eco-friendly coating. (C) 2019 Elsevier Ltd. All rights reserved.
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