Water in oil emulsion stabilized by tadpole-like single chain polymer nanoparticles and its application in biphase reaction.
In this study, tadpole-like single chain polymer nanoparticles (TSCPNs) were efficiently synthesized by intramolecularly cross-linking P4VP block of commercial block polymer of PMMA2250-b-P4VP286 in N,N-dimethylformamide using propargyl bromide as cross-linking agent. The intramolecular cross-linking reaction led to the production of TSCPNs with a linear tail and a cross-linked head. The as-prepared TSCPNs were then applied as emulsifier to stabilize water in chlorobenzene emulsion, and an extremely stabilized water in oil (W/O) emulsion was generated at a low TSCPNs concentration. The TSCPNs concentration was as low as 0.0075 wt % versus total weight of water and chlorobenzene for emulsion formation. The emulsifying performance of TSCPNs was better than that of low molecular surfactant, such as Span-80. The generated W/O emulsion provided an ideal medium for the reduction of oil-soluble p-nitroanisole by water-soluble sulfide to p-anisidine, an effective contact problem between the two reactants with different solubility was well solved through interfacial reaction.
College of Chemistry and ‡Key Lab of Environment Friendly Chemistry and Application in Ministry of Education, Xiangtan University , Xiangtan 411105, Hunan Province, P. R. China.
Fugui
F
Xu
Zhihui
Z
Fang
Duanguang
D
Yang
Yong
Y
Gao
Huaming
H
Li
Daoyong
D
Chen