材料科学
复合材料
聚氨酯
碳纳米管
复合数
扫描电子显微镜
傅里叶变换红外光谱
极限抗拉强度
热稳定性
生物材料
聚合物
色散(光学)
透射电子显微镜
拉伸试验
化学工程
纳米技术
光学
物理
工程类
作者
Harekrishna Deka,Niranjan Karak,Ranjan Kalita,Alak Kumar Buragohain
出处
期刊:Carbon
[Elsevier]
日期:2010-06-01
卷期号:48 (7): 2013-2022
被引量:126
标识
DOI:10.1016/j.carbon.2010.02.009
摘要
Multi-walled carbon nanotube (MWCNT)-based composites have been prepared by in situ technique using Mesua ferrea L. seed oil-based hyperbranched polyurethane (HBPU) as the matrix. The scanning electron microscope, transmission electron microscope and Fourier transform infrared spectroscopy analyses revealed good dispersion as well as interaction of MWCNT with the matrix. Remarkable recovery of shape to the extent of 98% was obtained after composite formation. More than 300% improvement in tensile strength was observed as compared to the pristine HBPU. Significant enhancement of thermal stability up to 275 °C was found even at low MWCNT loading (1 wt.%). Bacterial degradation of the composite films was tested using two strains of Pseudomonas aeruginosa, MTCC 7814 and MTCC 7815. The composites exhibited enhanced biodegradability as compared to the pristine polymer. The cytocompatibility test based on hemolysis of red blood cells showed that the material lacks cytotoxicity. The investigation indicates that the material has high potential as shape memory biomaterial.
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