Zaragoza-Contreras E A, Lozano-Rodríguez E D, Román-Aguirre M, Antunez-Flores W, Hernández-Escobar C A, Flores-Gallardo Sergio G, Aguilar-Elguezabal A
Centro de Investigación en Materiales Avanzados, S.C., Laboratorio Nacional de Nanotecnología, Miguel de Cervantes No. 120, C.P. 31109, Complejo Industrial Chihuahua, Chihuahua, Chih., Mexico.
Micron. 2009 Jul-Aug;40(5-6):621-7. doi: 10.1016/j.micron.2009.02.007. Epub 2009 Feb 24.
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.
通过原位本体悬浮聚合法并借助超声处理，合成了纳米管浓度分别为0.04 wt%、0.08 wt%和0.16 wt%的多壁碳纳米管/聚苯乙烯复合材料。通过这种方法，实现了纳米管在聚合物基体中的包封和剥离。扫描电子显微镜发现了纳米管明显破碎的证据；这种破碎的原因归因于合成过程中超声作用引起的强烈空化作用。红外光谱表明，在合成过程中纳米管与聚苯乙烯之间没有形成共价键的证据。纳米管的加入并未提高热稳定性，这归因于纳米管浓度较低；然而，复合材料的玻璃化转变温度有所提高。
