Controlled interface between carbon fiber and epoxy by molecular self-assembly method

被引:19
作者
He, Jinmei [1 ]
Huang, Yudong [1 ]
Liu, Li [1 ]
Cao, Hailin [1 ]
机构
[1] Harbin Inst Technol, Polymer Mat & Engn Div, Dept Appl Chem, Fac Sci, Harbin 150001, Peoples R China
基金
中国国家自然科学基金;
关键词
composites; self-assembly; Raman spectroscopy and scattering; interfacial adhesion;
D O I
10.1016/j.matchemphys.2005.11.010
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, a new treatment method based on molecular self-assembly on carbon fiber surface was proposed for obtaining a controlled interface between carbon fiber and epoxy matrix in composite system. To form the controlled interfacial region, the surfaces of carbon fibers were first metallized by electroless Ag plating, then were reacted with a series of thiols (different chain lengths and terminally functional groups) to form self-assembly monolayers (SAMs), which further reacted with epoxy resin to generate a strong adhesion interface. The morphology, structure and composition of untreated and treated carbon fiber surface were investigated by atomic force microscope (AFM), surface-enhanced Raman scattering spectroscopy (SERS) and X-ray photoelectron spectroscopy (XPS), respectively. SERS study showed that thiols chemisorbed on Ag/carbon fiber in the form of thiolate species via the strong S-Ag coordinative bond. XPS study further confirmed the chemisorption by an S 2p(3/2) component observed at 162.2 eV The binding energy was characteristic of silver thiolate. The interfacial shear strength of the carbon fiber/epoxy microcomposites was evaluated by the microbond technique. The results showed that there was a direct effect of the interfacial parameters changes such as chain lengths and surface functional groups on the fiber/matrix adhesion. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:388 / 393
页数:6
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