Citation: PAN Hui, ZHAO Tian, ZHANG Yu-Dong, ZHANG Zhi-Jun. Preparation, Characterization and Properties of Titania/Graphite Oxide Nanocomposite[J]. Acta Physico-Chimica Sinica, 2013, 29(03): 660-666. doi: 10.3866/PKU.WHXB201212282
氧化钛/氧化石墨纳米复合材料的制备、表征及性能
采用四氯化钛(TiCl4)和氧化石墨为主要原料, 通过原位复合的方法制备了氧化钛/氧化石墨(TiO2/ )纳米复合材料. 采用傅里叶变换红外(FTIR)光谱仪、X射线衍射(XRD)仪、热重-差热分析(TG-DTA)仪、X射线光电子能谱(XPS)、透射电子显微镜(TEM)和扫描电子显微镜(SEM)等手段研究了TiO2/ 纳米复合材料的结构和性能. 结果表明, 石墨在氧化过程中结构层键合大量含氧官能团, 部分含氧官能团进一步与纳米TiO2以化学键结合; 复合后氧化石墨原有衍射峰消失. 将TiO2/ 添加到水性聚氨酯(WPU)中, 制备了TiO2/ -WPU复合涂膜. 紫外吸收光谱表明, 随着氧化石墨含量的增加, 复合涂膜的紫外吸收能力增强, 当 含量达到一定数值时, 涂膜的紫外吸收最强, 随着 含量继续增加吸收又呈下降趋势, 存在一较优浓度值. TiO2/ 的添加显著提高了聚氨酯涂层的抗紫外线性能, 耐磨损性能和热稳定性能.
English
Preparation, Characterization and Properties of Titania/Graphite Oxide Nanocomposite
Titania/graphite oxide (TiO2/ ) nanocomposites were obtained from a facile in-situ method using titanium tetrachloride (TiCl4) and . Nanocomposite structures and properties were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric-differential thermal analysis (TG-DTA), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and UV-Vis absorption spectroscopy. TiO2/ nanocomposites could be well dispersed in water, and the addition of waterborne polyurethane (WPU) yielded TiO2/ -WPU coatings. During oxidation, the graphite structural layer bound with numerous functional groups, some of which were chemically bound TiO2. The peak disappeared after combining with TiO2 nanoparticles. UV absorption data indicated an increasing percentage of WPU with increasing content. There was an optimal additive concentration at which the best absorbance results were achieved. The thermal stability and UV and wear resistance of the WPU were greatly improved upon the addition of TiO2/ .
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Key words:
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Titania
- / Graphite oxide
- / Nanocomposite
- / Preparation
- / Characterization
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