材料科学
碳纳米管
纳米复合材料
结晶度
复合材料
高密度聚乙烯
色散(光学)
复合数
拉曼光谱
聚乙烯
聚合物
表面改性
化学工程
光学
物理
工程类
作者
Filipe V. Ferreira,Wesley Francisco,Beatriz Rossi Canuto de Menezes,Felipe Sales Brito,André S. Coutinho,Luciana De Simone Cividanes,Aparecido dos Reis Coutinho,Gilmar Patrocínio Thim
标识
DOI:10.1016/j.apsusc.2016.07.164
摘要
The effect of carbon nanotube treatment on the mechanical property of polyethylene/carbon nanotube composite (HDPE/CNT) was investigated. CNTs were initially treated with HCl and then with H2SO4/HNO3. Nanocomposites reinforced with untreated and treated CNTs were prepared by a mechanical mixture of the molten polymer. The results demonstrated a correlation among the surface treatment, dispersion and mechanical properties of HDPE/CNT composites. Raman spectroscopy and TGA analysis showed that both acid treatments removed efficiently amorphous carbon and residual metal catalysts of CNTs. However, these treatments not only removed impurities, they also decreased the crystallinity degree of CNTs due to the addition of oxygenated functional groups to the CNTs walls, as observed by XPS analysis. SEM micrographs revealed that the functional groups improved the CNTs dispersion in the polymeric matrix, resulting in an improvement of the mechanical properties of nanocomposites.
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