石墨烯/细菌纤维素复合材料的原位生物合成

Preparation of Graphene/Bacterial Cellulose Composites by In-situ Biosynthesis Method

通过原位生物合成技术在细菌纤维素(BC)中掺杂一定量的石墨烯(GR),一步法制备得到石墨烯掺杂细菌纤维素复合材料(GR/BC).采用场发射扫描电子显微镜(FESEM)分析了GR/BC的表面形貌和GR的分布情况,采用电导率测试仪研究了GR含量对GR/BC电导率的影响.探究了培养时间、石墨烯添加量对GR/BC形成过程和产率的影响.结果表明,GR能通过原位生物合成技术均匀地分散到BC中,当石墨烯分散液浓度为10 wt%,培养时间为5 d时,GR/BC复合膜产率为2.4 g/L,其电导率最高可达50 S/m.

In this paper,graphene(GR)doped bacterial cellulose(BC)composite(GR/BC)was prepared by one step in-situ biosynthesis method.The surface morphology of GR/BC and the distribution of GR were monitored by field emission scanning electron microscopy(FESEM),and the effects of GR content on the electrical conductivity of GR/BC were analyzed by an electrical conductivity meter.The effects of culture time and addition amount of graphene on the formation of GR/BC were also investigated.The results showed that GR could be uniformly dispersed into BC by in-situ biosynthesis method,while the culture time was 5 days and the initial graphene concentration was 10 wt%,the yield of the resulting GR/BC was 2.4 g/L,and the electrical conductivity of GR/BC reached to 50 S/m.