Reduced graphene oxide composites with water soluble copolymers having tailored lower critical solution temperatures and unique tube-like structure

被引：21

作者：

Namvari, Mina ^{[1
,2
]}

Biswas, Chandra S. ^{[1
,2
]}

Galluzzi, Massimiliano ^{[1
,2
]}

Wang, Qiao ^{[1
]}

Du, Bing ^{[1
]}

Stadler, Florian J. ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Mat Sci & Engn, Nanshan Dist Key Lab Biopolymers & Safety Evaluat, Guangdong Res Ctr Interfacial Engn Funct Mat,Shen, Shenzhen 518060, PR, Peoples R China

[2] Shenzhen Univ, Coll Optoelectron Engn, Key Lab Optoelectron Devices & Syst Minist Educ &, Shenzhen, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

关键词：

CLICK CHEMISTRY; RAFT POLYMERIZATION; POLYSTYRENE CHAINS; GRAFT DENSITIES; GRAPHITE OXIDE; SURFACE; FUNCTIONALIZATION; NANOSHEETS; SHEETS; CARBON;

D O I：

10.1038/srep44508

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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.

引用

页数：9

共 51 条

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