乙烯醇
石墨烯
材料科学
动态力学分析
差示扫描量热法
玻璃化转变
拉曼光谱
傅里叶变换红外光谱
复合材料
复合数
氧化物
热稳定性
扫描电子显微镜
聚合物
化学工程
纳米技术
物理
工程类
光学
冶金
热力学
作者
Faezeh Rahbarshendi,Ayda Baybordiani,H. Asgharzadeh,Milad Badr,K. Hassannezhad
摘要
PVA matrix composite films reinforced with graphene oxide (GO) and reduced graphene oxide (rGO) nanoplatelets are prepared by water-solution processing. The structure and properties of the composites are investigated by field-emission scanning electron microscopy, Raman spectroscopy, Fourier-transform infrared spectroscopy, differential scanning calorimetry, and dynamic mechanical analysis. The results indicate a 22% improvement in the storage modulus and a 12°C increase in the glass transition temperature by the addition of only 0.5 wt% rGO into the PVA. The enhancement of the mechanical and thermal properties of the composite films is attributed to the hydrogen bond barrier and molecule movement restriction effects. The higher amount of the hydrogen bonds in the PVA/rGO composite compared to the PVA/GO sample cause its higher thermal stability and mechanical performance.
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