Northeastern University, Department of Mechanical and Industrial Engineering, College of Engineering, 360 Huntington Avenue, 334 Snell Engineering Center, Boston, Massachusetts 02115-5000, United States.
ACS Appl Mater Interfaces. 2013 Feb;5(3):807-14. doi: 10.1021/am302382m. Epub 2013 Jan 22.
In order to improve stress transfer between polymer matrixes and nanofillers, controlling the structure development in the interphase region during composite processing is a necessity. For polyacrylonitrile (PAN)/single-wall carbon nanotubes (SWNT) composites, the formation of the PAN interphase in the presence of the SWNT as a function of processing conditions is studied. Under these conditions, three distinct interfacial coating morphologies of PAN are observed on SWNT. In the semidilute polymer concentration regime subjected to shearing, PAN extended-chain tubular coatings are formed on SWNT. Dilute PAN/SWNT quiescent solutions subjected to cooling yields hybrid periodic shish-kebab structures (first observation for PAN polymer), and dilute PAN/SWNT quiescent solutions subjected to rapid cooling results in the formation of an irregular PAN crystalline coating on the SWNT.
为了提高聚合物基体和纳米填料之间的应力传递，在复合材料加工过程中控制界面区域的结构发展是必要的。对于聚丙烯腈(PAN)/单壁碳纳米管(SWNT)复合材料，研究了在 SWNT 存在下，作为加工条件函数的 PAN 相间的形成。在这些条件下，在 SWNT 上观察到三种不同的 PAN 界面涂层形态。在受剪切的半浓聚合物浓度范围内，SWNT 上形成了 PAN 伸展链管状涂层。在冷却条件下，稀 PAN/SWNT 静止溶液产生了混合周期性 shish-kebab 结构（PAN 聚合物的首次观察），而在快速冷却条件下，稀 PAN/SWNT 静止溶液导致 SWNT 上形成不规则的 PAN 结晶涂层。
