| 초록 |
Polyurethanes (PUs) have been utilized extensively in a wide range of application areas as soft/hard foams, seals, gaskets, panels, adhesives, coatings, sealants, fibers, etc., owing to their facile molecular design and tunable physical properties. In this study, to attain eco-friendly PUs with high performance in thermo-mechanical properties, a cationic waterborne PU (cWPU) was synthesized by using polytetrahydrofuran, isophorone diisocyanate, N-methyl diethanolamine and 1,4-butanediol and its nanocomposite films reinforced with chitin nanofiber (ChNF) were fabricated by a facile solution casting. The molecular structure, microstructural features, thermal and mechanical properties of the cWPU/ChNF nanocomposite films were systematically characterized by using FTIR, SEM, DSC, TGA and DMA, and the results were discussed in terms of the ChNF content. |
