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- 2015
氧化石墨烯纳米片/环氧树脂复合材料的制备与性能
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Abstract:
氧化石墨烯(GO)是石墨烯重要的衍生物之一, 通过氧化和超声波分散制备了GO纳米片/环氧树脂复合材料。采用XRD、拉曼光谱、FTIR和TEM表征了GO纳米片的结构与形貌, 研究了GO纳米片用量对GO纳米片/环氧树脂复合材料热稳定性、力学性能及介电性能的影响。结果表明:GO纳米片的加入提高了GO纳米片/环氧树脂复合材料失热稳定性;随着GO纳米片填充量的增加, GO纳米片/环氧树脂复合材料的冲击强度和抗弯性能先提高后降低, 其介电常数和介电损耗则先减小后增加。GO纳米片填充量为0.3wt%的GO纳米片/环氧树脂复合材料的失重5%时的热分解温度由纯环氧树脂的400.2 ℃提高到424.5 ℃, 而冲击强度和弯曲强度分别在GO纳米片填充量为0.2wt%和0.3wt%时达到最大, 冲击强度由纯环氧树脂的10.5 kJ/m2提高到19.7 kJ/m2, 弯曲强度由80.5 MPa提高到104.0 MPa。 Graphene oxide (GO) is one of the most important derivatives of graphene. GO nanosheets/epoxy composites were prepared by oxidization and ultrasonic dispersion. The structure and morphology of GO nanosheets were characterized by XRD, Raman spectrum, FTIR and TEM. The effects of GO nanosheet content on the thermal stability, mechanical property and dielectric property of GO nanosheets/epoxy composites were discussed. The results show that the thermal stability of GO nanosheets/epoxy composites is improved by adding GO nanosheets. The impact strength and bending strength first increase and then decrease with increasing GO nanosheets loading. Dielectric constant and dielectric loss first decrease and then increase. The thermal decomposition temperature with 5% mass loss is improved from 400.2 ℃ for the pure epoxy to 424.5 ℃ for the GO nanosheets/epoxy composites with 0.3wt% GO nanosheets loading. Furthermore, the impact strength and bending strength with 0.2wt% and 0.3wt% GO nanosheets loading reach the maximum respectively, increasing from 10.5 kJ/m2 for the pure epoxy to 19.7 kJ/m2 and from 80.5 MPa to 104.0 MPa. 黑龙江省教育厅面上项目(12511067); 黑龙江省大学生创新训练项目(201310214022); 黑龙江省高校科技创新团队建设计划 (2013TD008)
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