超临界流体快速膨胀法分散碳纳米管  

Dispersion of carbon nanotubes in a polymer by the rapid expansion of a supercritical suspension

作　　者：赵健[1] 刘振生[1] 胡文彬[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室/橡塑材料与工程山东省重点实验室,山东青岛266042

出　　处：《新型炭材料》2014年第5期386-391,共6页New Carbon Materials

基　　金：国家自然科学基金(51373088);国家重点基础研究发展计划(973计划;2012CB722606);青岛市科学人员科研启动基金技术(12-1-4-3-(7)-JCH;12-1-4-3-(25)-JCH);化工资源有效利用国家重点实验室(北京化工大学)开放课题(CRE-2012-C-204)~~

摘　　要：利用超临界状态下CO2的快速膨胀(RESS)来分散碳纳米管,为可放大化且无挥发性有机化合物的新方法。将碳纳米管在超临界CO2悬浮液中经由微细喷嘴快速膨胀使其均匀分散。电子显微镜(SEM)表征证实RESS可有效地实现碳纳米管的分散。同时,为了解决再团聚难题,提出利用小分子包覆法和将碳纳米管嵌入高分子基体法来防止其再团聚,均起到良好的效果。We report a scalable and volatile organic compound-free process for the production of well-dispersed carbon nanotubes （CNTs） in a polymer by the rapid expansion of a supercritical suspension （RESS）, in which CNTs had been suspended in super- critical carbon dioxide, and CO_2 and CNTs released from the suspension were rapidly vented through a nozzle. Reagglomeration of the CNTs after RESS can be prevented by premixing them with dimethyl isophthalate or poly（ methyl methacrylate）, which can be dissolved in supercritical carbon dioxide, or by embedding the nozzle in molten poly（methyl methacrylate）. Keywords： Carbon nanotube; Dispersion; Supercritical fluid; Rapid expansion

关 键 词：碳纳米管 分散 超临界流体 快速膨胀 

分 类 号：TB383.1[一般工业技术—材料科学与工程]