Liu Lei, Etika Krishna C, Liao Kang-Shyang, Hess Lance A, Bergbreiter David E, Grunlan Jaime C
Department of Mechanical Engineering and Materials Science and Engineering Program, Texas A&M University, College Station, Texas, TX 77843-3123, USA.
Macromol Rapid Commun. 2009 Apr 20;30(8):627-32. doi: 10.1002/marc.200800778. Epub 2009 Mar 4.
Carbon nanotubes typically require the use of a dispersing or stabilizing agent to prevent significant aggregation during incorporation into a polymer matrix. These additives must be strongly associated, either covalently or physically, to achieve their purpose. In this study, multi-walled carbon nanotubes (MWNTs) were dispersed into an epoxy matrix using polyethylenimine (PEI) as a dispersant that was either covalently attached to the nanotubes or physically mixed to result in only noncovalent interaction. Epoxy composites containing covalently modified MWNTs exhibited greater storage modulus and reduced electrical conductivity.
碳纳米管通常需要使用分散剂或稳定剂，以防止在掺入聚合物基体过程中发生显著聚集。这些添加剂必须通过共价或物理方式紧密结合，才能达到其目的。在本研究中，使用聚乙烯亚胺（PEI）作为分散剂，将多壁碳纳米管（MWNTs）分散到环氧树脂基体中，PEI 要么共价连接到纳米管上，要么仅通过物理混合形成非共价相互作用。含有共价修饰 MWNTs 的环氧复合材料表现出更高的储能模量和更低的电导率。
