石墨烯柔性纸及其复合材料的制备与性能

发布时间：2018-04-13 03:30

  本文选题：氧化石墨烯纸 + 热还原　； 参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：本文以平板玻璃为衬底,采用不同浓度的氧化石墨烯(Graphite Oxide,GO)溶液制备了柔性的氧化石墨烯纸,并对其采用热还原的方式得到了不同还原程度的柔性石墨烯纸。采用XRD、SEM、XPS等方式对其进行了结构表征,并对其导电及力学性能分别进行了测试。研究表明,溶液浓度对柔性氧化石墨烯纸的制备具有重要的影响,选择浓度为4.33 mg/ml的GO溶液2.5ml,可以得到质量为9.5mg、厚度为4?m的完整柔性氧化石墨烯纸。SEM观察表明,该氧化石墨烯纸由排列规则的氧化石墨烯片层叠而成,与空气接触的一面具有褶皱起伏的特性,而与玻璃接触的另一面则光滑平整。该氧化石墨烯纸的C/O值为1.43,具有较高的氧化程度。氩气气氛下高温还原实验结果表明,随着还原温度升高,氧化石墨烯纸的XRD衍射峰逐渐消失,当还原温度为1100℃,保温时间1h时,其衍射特征峰已消失,体现了良好的还原特性。力学测试结果表明,柔性石墨烯纸的拉伸强度随还原程度的增加而增加。相比于氧化石墨烯纸的力学性能,杨氏模量16GPa,拉伸强度26MPa,石墨烯纸的的性能改善为杨氏模量76Gpa,拉伸强度89Mpa。高温还原的石墨烯纸的电阻率为59.7Ω。采用层叠法制备了石墨纸/PDMS复合材料,其杨氏模量从基体的3.4 GPa提高到101 GPa,但拉伸应力有所降低。复合材料的界面润湿及界面结合仍待探讨。
[Abstract]:In this paper, flexible graphene oxide paper was prepared on flat glass substrate by using different concentration of graphene oxide (Graphite oxide oxide) solution, and the flexible graphene paper with different degree of reduction was obtained by thermal reduction.Its structure was characterized by means of XRDX SEMX XPS, and its electrical and mechanical properties were tested.The results show that the concentration of the solution has an important effect on the preparation of flexible graphene oxide paper. The complete flexible graphene oxide paper with a mass of 9.5 mg and a thickness of 4 m can be obtained by selecting the go solution 2.5ml with a concentration of 4.33 mg/ml.The graphene oxide paper is made of graphene oxide sheets with regular arrangement. The contact with air has the characteristic of ruffling and undulating, while the other side of contact with glass is smooth and smooth.The C / O value of the graphene oxide paper is 1.43, which has a high oxidation degree.The experimental results of high temperature reduction in argon atmosphere show that the XRD diffraction peak of graphene oxide paper disappears gradually with the increase of reduction temperature. When the reduction temperature is 1100 鈩，

本文编号：1742740