Preparation of Thin-Layer Graphene Using RAFT Polymerization and a Thiol-Ene Click Reaction
- Authors
- Kwon, Minho; Lee, Taeheon; Lee, Youngsil; Han, Jong Hun; Paik, Hyun-jong
- Issue Date
- Oct-2019
- Publisher
- POLYMER SOC KOREA
- Keywords
- graphene; functionalized graphene oxide; RAFT; thiol-ene; click chemistry
- Citation
- MACROMOLECULAR RESEARCH, v.27, no.10, pp.955 - 962
- Journal Title
- MACROMOLECULAR RESEARCH
- Volume
- 27
- Number
- 10
- Start Page
- 955
- End Page
- 962
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/143
- DOI
- 10.1007/s13233-019-7138-9
- ISSN
- 1598-5032
- Abstract
- In this paper, functionalization of graphene is conducted through click reactions for its effective dispersion. The poly(sodium 4-styrenesolfonate) (PSS) was synthesized using reversible addition-fragmentation chain transfer (RAFT) polymerization. The chain end dithioester group of RAFT-polymerized PSS was reduced to a thiol and used to couple PSS to graphene oxide (GO) via a thiol-ene click reaction. An aqueous dispersion of reduced GO with PSS (PSS-rGO) resisted sedimentation due to steric effects and charge-charge repulsion between the PSS attached to rGO. Atomic force microscopy showed that the PSS-rGO mixture was composed of dispersed particles of thin-layer (1.5 nm thick) graphene. Thickness of the PSS-rGO was close to that of GO. This indicates that there was no significant re-aggregation during GO reducing process.
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