Jiang, Tongwu Kuila, Tapas Kim, Nam Hoon Ku, Bon-Cheol Lee, Joong Hee 2024-01-20T12:32:33Z 2024-01-20T12:32:33Z 2021-09-04 2013-04-18 0266-3538 https://pubs.kist.re.kr/handle/201004/128154 The toughening effects of 3-aminopropyltriethoxysilane (APTES) functionalized silica nanoparticles attached graphene oxide (ATGO) in epoxy were investigated. Fourier transform infrared and X-ray photoelectron spectroscopy analysis confirmed chemical functionalization and partial reduction of GO during the functionalization. The nanostructures of GO and ATGO were observed by transmission electron microscopy. The tensile strength and modulus of 1 wt.% ATGO-filled epoxy composites at cryogenic temperature (Cr) were 29.2% and 22.0% higher than those of pure epoxy. Interestingly, both the tensile strength and modulus of all the composites at CT were significantly higher than those at room temperature (RT). In contrast, impact strength of the composites at RT was higher than that at CT due to the restricted molecular mobility of epoxy. The fracture toughness (K-IC) obtained from the single edge notched bending (SENB) test increased sharply with an increase in ATGO loading in the epoxy up to 1 wt.%. The fracture surfaces of the composites analyzed through field emission scanning electron microscopy (FE-SEM) shown the rough surfaces confirming the enhanced impact and tensile properties of the ATGO filled composites. (C) 2013 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD TOUGHENED EPOXY-RESIN AQUEOUS DISPERSIONS FRACTURE-TOUGHNESS OXIDE NANO NANOCOMPOSITES MORPHOLOGY REDUCTION BEHAVIORS PARTICLES Enhanced mechanical properties of silanized silica nanoparticle attached graphene oxide/epoxy composites Article 10.1016/j.compscitech.2013.02.018 1 COMPOSITES SCIENCE AND TECHNOLOGY, v.79, pp.115 - 125 COMPOSITES SCIENCE AND TECHNOLOGY 79 115 125 scie scopus 000318377900015 2-s2.0-84876026783 Materials Science, Composites Materials Science Article TOUGHENED EPOXY-RESIN AQUEOUS DISPERSIONS FRACTURE-TOUGHNESS OXIDE NANO NANOCOMPOSITES MORPHOLOGY REDUCTION BEHAVIORS PARTICLES Interfacial strength Mechanical properties Photoelectron spectroscopy (XPS) Thermogravimetric analysis (TGA)