Effect of nano-CaCO3 on structure and properties of nano-CaCO3/PES composite membrane
Nano-CaCO3/PES composite membrane was prepared by non-solvent induced phase separation(NIPS)technology to understand the morphology,mechanical properties,hydrophilicity,separation properties and anti-fouling properties of nano-CaCO3/PES composite membrane.The morphology,physical chemistry properties and separation properties of the composite membranes were characterized.The effects of nano-CaCO3 weight fraction on the structure and properties of the membranes were investigated.The results showed that nano-CaCo3 could effectively optimize the structure of the membrane,and simultaneously improve the physical chemistry performance and separation efficiency.When nano-CaCO3 weight fraction was 0.3％,the mechanical strength of the composite membrane was 3.8MPa.Compared to pure PES materials,the mechanical strength was increased by 65％.The hydrophilicity was also improved.The permeability of pure water was 450L/(m2·h·bar)(1bar=105Pa),which was increased by 1.7 times.At the same time,the retention rate of BSA was over 99％and the anti-pollution property of BSA was improved from 48.8％to 77.1％,which had good anti-pollution effect.The present study offered a highly effective and straightforward approach to optimize membrane structure and enhance membrane performance,thereby holding significant practical application value.
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