Surface Modification of Carbon Fiber with PAMAM and its Molecular Dynamics Simulation
SUN Jing-feng, XING Li-xin, YAO Yuan, ZHAO Feng and HUANG Yu-dong
(MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, College of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China)
Abstract: The polyamide-amine dendrimer (PAMAM) was grafted onto the surface of T700 carbon fiber (CFs) by chemical method. The surface morphology of CFs before and after grafting of different generation PAMAM molecules was compared. The interface shear strength (IFSS) of CFs/epoxy micro-composites was tested and the fracture morphology of the material was observed. Compared with the untreated fiber, the IFSS value of the composite with PAMAM-G1.0 grafted CFs increased by 30.37%. The structural model of CFs, epoxy resin and their interface were established and optimized via Materials Studio package. Then the interaction energy of the interface was simulated by molecular dynamics. The results showed that the introduction of PAMAM molecules onto CFs would improve the interfacial binding energy between CFs and epoxy resin, which was consistent with the experimental results.
Key words: CFs; PAMAM; interfacial property; interfacial binding energy |
