Micellar enhanced ultrafiltration using PEO–PPO–PEO block copolymers

Effect of phenol on the aggregation characteristics of an ethylene oxide–propylene oxide triblock copolymer P65 in aqueous solution

“…The relative viscosity of P65 (4 wt%) as a function of temperature at different concentrations of phenol demonstrates that at higher temperatures, very low concentrations of phenol can make the large aggregates. An increase in the temperature reduces the H-bonding of PEO unit with water, favouring the solubilization of more or- ganic molecules in the micellar structure [32], which provides reversibility with temperature as suggested by Choi et al [24]. For 1.00% v/v phenol, even a small increase in temperature increases the viscosity of order of ∼3.…”

“…1 it can be seen that for 1.00% v/v of phenol, <2 wt% of P65 is required to bring the CP near to 0 • C. As stated, this offers the possibility of Pluronics being used to separate phenols and phenol derivatives from wastewater through cloud point extraction. The advantage of this over the method of Choi et al [24] is that it uses less Pluronic and does not require a complex separation system. …”

“…Little work has been reported to find the effects of phenol on the aggregation behaviour of block copolymers [23]. Choi et al [24] have reported the micellar-enhanced ultrafiltration of phenol using Pluronics and the effectiveness of P103 on rejection of solute. The technique used was based on membrane separation and has been reported to be most effective when high concentrations of Pluronics were used.…”

Surface active properties of chitosan and its derivatives

“…The most common examples of these substances are that built up of long chain alkyl or alkyl aryl hydrophobic moiety connected with hydrophilic, mostly, polyethylene oxide. Nonionic polymeric surfactants find wide applications in emulsion polymerization; [7] liquid crystalline phases [8], miceller enhanced ultrafiltration [9], surface modifications, [10] destabilization of water in crude oil emulsions [11,12] and other industrial applications.…”

Solubilization of P-Alkylphenols in Pluronics F-68 and F-127 Micelles: Partition Coefficients and Effect of Solute on the Aggregate Structure

“…On approaching the CP many of these copolymer solutions exhibit sphere to rod transitions 8 . From all the Pluronics, F-127 has shown to be a very interesting one owing to its potential use as DDS [9][10][11] , removal of aromatic contaminants from industrial waste waters 12,13 , and in preparation of mesoporous materials [14][15][16] . Pluronic F-127 form spherical micelles where the core of the micelles consists of hydrophobic PPO blocks, whereas the corona is formed by hydrated PEO blocks 17 .…”