Regulation of polyethersulfone membrane morphology and its influence on filtration performance
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Optimizing the filtration performance of polymer membranes, mainly through morphology manipulation, remains a crucialfocus in membrane research. This study systematically examined the relationship between membrane morphology andfiltration performance in polyethersulfone (PES) membranes by varying the composition of the casting solution. Scanningelectron microscopy (SEM), atomic force microscopy (AFM), and Brunauer-Emmett-Teller (BET) analysis were used toinvestigate the membrane's microstructure thoroughly. Results showed that increasing PES concentration led to smaller poresizes and reduced porosity, resulting in lower water permeance and higher retention rates. Additionally, analyses of the t-plotmicropore area and BJH cumulative pore surface area revealed the influence of micropores and mesopores on permeanceand retention. Different molecular weights and concentrations of polyethylene glycol (PEG) significantly altered the poredistribution, impacting overall membrane performance.
Abstract
Optimizing the filtration performance of polymer membranes, mainly through morphology manipulation, remains a crucialfocus in membrane research. This study systematically examined the relationship between membrane morphology andfiltration performance in polyethersulfone (PES) membranes by varying the composition of the casting solution. Scanningelectron microscopy (SEM), atomic force microscopy (AFM), and Brunauer-Emmett-Teller (BET) analysis were used toinvestigate the membrane's microstructure thoroughly. Results showed that increasing PES concentration led to smaller poresizes and reduced porosity, resulting in lower water permeance and higher retention rates. Additionally, analyses of the t-plotmicropore area and BJH cumulative pore surface area revealed the influence of micropores and mesopores on permeanceand retention. Different molecular weights and concentrations of polyethylene glycol (PEG) significantly altered the poredistribution, impacting overall membrane performance.