No abstract

Self-assembly of Gemini surfactants (maleic alkylene group diethylbis [octyl dimethyl bromide], abbreviated as G 16-2-16 ) were used to form reversed micelles by introducing sodium salicylate (NaSal) into chloroform solution of PSF (polysulfone). The rheological measurements indicated that micelles had been formed. The internal surface of micelles were full of orderly arranged quaternary ammonium (QA) groups as cationic active sites. Then we characterized the composite membranes which were introduced micelles, it turned out that, the OH − conductivity in presence of NaSal was higher than the absence one, indicating that the formation of reversed micelles arranged the cationic active sites more orderly, resulted in improving the anionic conductivity by 40-80%, especially under low values of water uptake and ion exchange capacity condition, which provided a kind of approach of enhancing OH − migration efficiency without sacrificing its dimensional stability and mechanical properties. The composite membranes also showed an outstanding thermal stability. And 240 h high temperature alkaline-stable test (10 M NaOH) revealed that the largest decline of OH − conductivity was only round about 4%, which showed excellent alkaline resistance stability.

A gemini-type basic morpholine ionic liquid ([Nbmd][OH]) was synthesized via a two-step method with morpholine, bromododecane and 1,4-dibromobutane as raw materials, and its structure was characterized by 1H NMR and FT-IR spectroscopy.

Increasing environmental pollution caused by toxic dyes due to their hazardous nature is a matter of great concern, and lacks the effective methods to remove them. Therefore, in this research a series of H3O40PW12/Quaternized chitosan (PWX%/QCS) membrane catalyst is synthesized based on QCS (positively charged) and keggin‐type H3O40PW12 (negatively charged), which is available to degrade rhodamine B. The optimum experimental conditions are investigated and results reveal that the degradation rate is over 92.1% and the chemical oxygen demand (COD) decreases is 78.09%, which is obtained based on the follow conditions is that the UV radiation is 90 min, the dose of membrane catalyst is 0.1g, the doping amount PW12 (H3O40PW12) is 35 wt%, RB aqueous solution (30mL) is 5mg/L, the reaction temperature is 30°C, pH = 5 and H2O2 is 20mM. The simulation result reveals that the photocatalytic degradation reaction of RB with PWX%/QCS membrane catalyst in an aqueous solution can be described by the Langmuir–Hinshelwood equation. And the initiation rate constant and the initiation adsorption constant in this case are 4.082mg/(L/min) and 0.01090L/mg, respectively.