• 文献标题:   Reduced graphene oxide composites with water soluble copolymers having tailored lower critical solution temperatures and unique tube-like structure
  • 文献类型:   Article
  • 作  者:   NAMVARI M, BISWAS CS, GALLUZZI M, WANG Q, DU B, STADLER FJ
  • 作者关键词:  
  • 出版物名称:   SCIENTIFIC REPORTS
  • ISSN:   2045-2322
  • 通讯作者地址:   Shenzhen Univ
  • 被引频次:   8
  • DOI:   10.1038/srep44508
  • 出版年:   2017

▎ 摘  要

Nanohybrids of graphene with water soluble polymer were synthesized using `grafting from' method. GO, prepared by modified Hummers' method, was first reacted with sodium azide. Alkyne-terminated RAFT-CTA was synthesized by reaction of propargyl alcohol and S-1-dodecyl-S'-(alpha,alpha`-dimethyl-alpha ''-acetic acid) trithiocarbonate. RAFT-CTA was grafted onto the GO sheets by facile click-reaction and subsequently, N-isopropylacrylamide (NIPAM) and N-ethyleacrylamide (NEAM) were polymerized on graphene sheets via RAFT polymerization method. The respective copolymers with different ratios were also prepared. The nanohybrids were characterized by FTIR, XRD, TGA, Raman, SEM, and AFM. Both SEM and AFM clearly showed rod-like structures for rGO-PNEAM. XRD showed a small peak at 2 theta = 19.21 degrees, corresponding to d-spacing approximate to 4.6 angstrom. In addition, the nanohybrids showed a very broad temperature range for the LCST in water between ca. 30 and 70 degrees C.