Enhanced mechanical properties of carbon fiber composites by grafting different structural poly(amido amine) onto fiber surface |
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| Institution: | 1. School of Materials Science and Engineering, Shandong University of Science and Technology, 266590 Qingdao, PR China;2. Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, 250061 Jinan, PR China;1. School of Chemical Engineering and Technology, Harbin Institute of Technology, P.O. Box 410, Harbin 150001, PR China;2. Rizhao Entry-Exit Inspection and Quarantine Bureau, Rizhao 276826, PR China;1. School of Materials Science and Engineering, Shandong University of Science and Technology, 266590 Qingdao, PR China;2. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, PR China;3. College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, PR China;1. School of Materials Science and Engineering, Shandong University, Jinan, People''s Republic of China;2. School of Materials Science and Engineering, Shandong University of Science and Technology, 266590 Qingdao, People''s Republic of China |
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| Abstract: | The mechanical properties of carbon fiber composites depend on the interfacial strength between fiber and epoxy matrix. Different poly (amido amine) (PAMAM) dendrimers were grafted onto carbon fiber to improve the interfacial strength of the resulting composites. Functional groups on the carbon fiber surface were examined by X-ray photoelectron spectroscopy. The surface morphology of the resulting materials was characterized by scanning electron microscopy and atomic force microscope. The characterization results revealed that PAMAM dendrimers were chemically grafted onto the surface of carbon fiber. More importantly, the mechanical properties of the resulting composites were enhanced owing to the presence of sufficient functional groups on the carbon fiber surface. In addition, after PAMAM containing chair conformations were grafted, the interlaminar shear strength had the highest increase of 53.13%, higher than that of the fiber grafted with PAMAM containing terminated linear amine. This work provides an alternative approach to enhance the mechanical properties of fiber composites by controlling the interface between fiber and epoxy matrix. |
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| Keywords: | Carbon fiber Mechanical properties Interfaces/Interphase Surface modification |
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