The effect of coupling agents on the interfacial properties of wood‐fiber–reinforced polyimide composites |
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| Authors: | Li Ying Yang Liu Hu Dan Yang Di |
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| Affiliation: | 1. Information School, Yunnan University of Finance and Economics, Kunming, Yunnan Province, P. R. China;2. The Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, P. R. China |
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| Abstract: | Wood‐fiber–reinforced polyimide (PI) has been widely used in many engineering fields because of its high specific strength and stiffness. However, PI does not adhere well with wood fibers because it has a low free surface energy. In addition, high viscosity in the melted phase causes poor impregnation. In this study, surface treatment methods, ie, coupling agents with plasma treatment on wood fibers, were applied to increase the interfacial strength between the wood fibers and the PI matrix. The modified wood fiber surfaces were analyzed by X‐ray photoelectron spectroscopy and scanning electron microscopy. To analyze the effectiveness of the surface treatment method, the interlaminar shear strength (ILSS) was measured using the 3‐point bending test. From the test results, the ILSS of the specimens treated with the silane coupling agent after the plasma treatment increased by 48.7% compared with those of the untreated specimens. |
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| Keywords: | ILSS mechanical properties surface analysis surface treatments wood fiber |
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