Preparation and properties of reduced graphene oxide/cellulose films

doi:10.16085/j.issn.1000-6613.2017.05.035

Abstract

Abstract: This study aims to use reduced graphene oxide (RGO) to improve the properties of cellulose (CE) in ionic liquid (IL) solvent. To achieve that,graphene oxide (GO) was dispersed in deionized water to prepare RGO using thermal reduction method,then the obtained RGO was mixed with IL. After removing the moisture by vacuum distillation,we obtained uniform dispersed reduced graphene oxide (RGO)/IL solution. RGO/IL was used as CE solvent and RGO was added to improve the property of CE film,the morphology of the materials were revealed using scanning electron microscope (SEM),and the structures were characterized with XRD. The results show that under the RGO loading of 1%,the tensile strength and modulus of RGO₁₀/CE composite film was 122MPa and 6.77GPa respectively,which were 188% and 320% higher than that of CE film. The electrical conductivity of RGO/CE film was improved by 9 orders of magnitude,from 2.5×10^-14S/m to 4.7×10^-6S/m. It was due to the formation of new hydrogen bond between RGO and CE and the excellent two dimensional structures of RGO that made RGO significantly improve the thermal stability,mechanical properties and conductive capacity of the composite film.

Key words: cellulose, reduced graphene oxide, ionic liquid, composite film

摘要： 利用还原氧化石墨烯（RGO）改善离子液体溶剂纤维素（CE）的综合性能，将氧化石墨烯（GO）分散在去离子水中，通过热还原法得到RGO，RGO与离子液体（IL）混合后采用减压蒸馏法去除水分，得到均匀分散的RGO/IL溶液，以RGO/IL溶液为纤维素溶剂，利用RGO改善CE薄膜的各项性能，用扫描电子显微镜和XRD表征了材料的形貌和结构。结果表明，RGO质量分数为1%时，RGO/CE复合薄膜的拉伸强度和模量分别为122MPa和6.77GPa，较纯CE薄膜分别提高了188%和320%。RGO/CE复合薄膜的电导率为4.7×10^-6S/m，较纯CE薄膜（2.5×10^-14S/m）提高了9个数量级，由于RGO与CE分子链间新的氢键的形成以及RGO优异的二维结构，RGO可以显著提高复合薄膜的热稳定性、力学性能和导电能力。

关键词: 纤维素, 还原氧化石墨烯, 离子液体, 复合薄膜

CLC Number:

TQ327.9

WANG Dong, HUANG Yingwei. Preparation and properties of reduced graphene oxide/cellulose films[J]. Chemical Industry and Engineering Progress, 2017, 36(05): 1838-1842.

王咚, 黄颖为. 还原氧化石墨烯/纤维素复合薄膜的制备及性能[J]. 化工进展, 2017, 36(05): 1838-1842.

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