期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 9, 页码 4571-4578出版社
AMER CHEMICAL SOC
DOI: 10.1021/am300947b
关键词
polydopamine; clay; polyurethane; hydrogen bonds; interface
资金
- Science and Engineering Research Council of the Agency for Science, Technology and Research (A*Star) Singapore [092 137 0014]
Dopamine-modified clay (D-clay) was successfully dispersed into polyether polyurethane (PU) by solvent blending. It is found that the incorporation of D-clay into PU gives rise to significant improvements in mechanical properties, including initial modulus, tensile strength, and ultimate elongation, at a very low clay loading. The large reinforcement could be attributed to the hydrogen bonds between the hard segments of PU and stiff D-clay layers that lead to more effective interfacial stress transfer between the polymer and D-clay. Besides, the interactions between D-clay and PU are also stronger than those between Cloisite 30B organoclay and the PU chains. Consequently, at a similar clay loading, the PU/D-clay nanocomposite has much higher storage modulus than the PU/organoclay nanocomposite at elevated temperatures.
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