Evidence of multi-walled carbon nanotube fragmentation induced by sonication during nanotube encapsulation via bulk-suspension polymerization

被引：27

作者：

Zaragoza-Contreras, E. A. ^{[1
]}

Lozano-Rodriguez, E. D. ^{[1
]}

Roman-Aguirre, M. ^{[1
]}

Antunez-Flores, W. ^{[1
]}

Hernandez-Escobar, C. A. ^{[1
]}

Flores-Gallardo, G. ^{[1
]}

Aguilar-Elguezabal, A. ^{[1
]}

机构：

[1] Ctr Invest Mat Avanzados SC, Lab Nacl Nanotecnol, Chihuahua 31109, Chih, Mexico

来源：

MICRON | 2009年 / 40卷 / 5-6期

关键词：

Carbon nanotubes; Nanocomposite; Suspension polymerization; Encapsulation; IN-SITU POLYMERIZATION; MINIEMULSION POLYMERIZATION; POLY(METHYL METHACRYLATE); COMPOSITES; POLYSTYRENE; POLYCARBONATE; NANOCOMPOSITE; MECHANISMS; DISPERSION; FUNCTIONALIZATION;

D O I：

10.1016/j.micron.2009.02.007

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

The synthesis of multi-walled carbon nanotube/polystyrene composites, with nanotube concentrations of 0.04, 0.08 and 0.16 wt%, was carried out by in situ bulk-suspension polymerization with the assistance of sonication. By using this method both encapsulation and exfoliation of the nanotubes into the polymer host were achieved. Evidence of significant nanotube fragmentation was found by scanning electron microscopy; the cause of such fragmentation was attributed to the induction of strong cavitation due to the application of ultrasound during the synthesis. Infrared spectroscopy showed no evidence of the formation of covalent bonds between the nanotubes and the polystyrene during the process of synthesis. The thermal stability was not improved by the inclusion of the nanotubes, it was attributed to the low nanotube concentrations; however, composites glass transition temperature showed improvements. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：621 / 627

页数：7

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