Enhanced fracture toughness and mechanical properties of epoxy resin with rice husk-based nano-silica |
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| Authors: | Tien Duc Pham Cuong Manh Vu Hyoung Jin Choi |
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| Institution: | 1.Faculty of Chemistry, Hanoi University of Science,Vietnam National University, Hanoi,Hanoi,Vietnam;2.Center for Advanced Chemistry, Institute of Research and Development,Duy Tan University,Da Nang,Vietnam;3.Chemical Department,Le Qui Don Technical University,Ha Noi,Vietnam;4.Department of Polymer Science and Engineering,Inha University,Incheon,Korea |
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| Abstract: | This paper reports a novel approach to toughen epoxy resin with nano-silica fabricated from rice husk using a thermal treatment method with a particle size distribution in range of 40–80 nm. The nano-silica content was in the range, 0.03–0.10 phr, with respect to epoxy. The mechanical test showed that with the addition of 0.07 phr of rice husk based nano-silica, the fracture toughness of the neat epoxy resin increased 16.3% from 0.61 to 0.71 MPa m1/2. The dynamic mechanical analysis test results showed that the glass transition temperature (T g) of a 0.07 phr nano-silica dispersion in epoxy resin shifted to a higher temperature from 140 to 147°C compared to neat epoxy resin. SEM further showed that the nano-silica particles dispersed throughout the epoxy resin prevented and altered the path of crack growth along with a change in the fracture surface morphology of cured epoxy resin. |
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