Synthesis, Characterization, and Demulsification Behavior of Amphiphilic Dendritic Block Copolymers

Abstract

A series of Phenol-amine resin amphiphilic dendritic block copolymers were synthesized through anion polymerization. The critical micellization concentration of copolymers measured by surface tension and fluorescence spectra was a range and the range became wider with the content of polyethylene oxide decreased, while the critical aggregation concentration increased with the content of polyethylene oxide increased. The dehydration bottle tests showed that the copolymers had better water separation capability when the content of polyethylene oxide was 30 wt%. The rheological experiments showed that the addition of copolymers with 30 wt% polyethylene oxide could reduce the viscosity of crude oil emulsion mostly. Downloaded by [University of Newcastle, Australia] at 17:42 27 December 2014 2

The Demulsification Properties of Cationic Hyperbranched Polyamidoamines for Polymer Flooding Emulsions and Microemulsions

“…It was reported that a slightly hydrophilic value in the hydrophilic-lipophilic balance ((HLB) = 8~10) was observed when the various ratios of ethylene oxide (EO) and propylene oxide (PO) were adjusted, which could bridge and aggregate oil droplets. However, these require higher levels of energy to destroy the stability of the emulsion [18]. Natural polymeric surfactants were recently promoted and widely researched, with advantages including their low price, widespread procurability, biodegradability, and nontoxicity.…”