The Chinese Academy of Sciences has developed an antibacterial double-layer PVDF hollow fiber membrane

The Chinese Academy of Sciences has developed an antibacterial double-layer PVDF hollow fiber membrane

The Chinese Academy of Sciences has developed an antibacterial double-layer PVDF hollow fiber membrane

Recently, the functional membrane team of the Polymer Division of the Institute of Materials Technology and Engineering of the Chinese Academy of Sciences has prepared a double-layer polyvinylidene fluoride (PVDF) hollow fiber membrane enriched with antibacterial silver ions through a two-layer coextrusion technique .

The researchers further enriched the silver-loaded molecular sieve on the outer layer of the two-layer membrane by double-layer co-extrusion, and prepared the PVDF hollow fiber membrane with antibacterial properties by dry-jet-wet spinning method. The preparation of the two-layer membrane antibacterial agent was only 54% of the single-layer membrane, but showed near and better antibacterial properties and anti-bacterial adhesion properties, while the water flux and other properties did not decrease. According to reports, the team's researchers have previously produced a bicontinuous structure of PVDF membranes and a hollow fiber membrane with good antibacterial properties through non-solvent-induced auxiliary thermal phase separation. On this basis, in order to reduce the antibacterial agent-loaded silver molecular sieve The amount of antibacterial efficiency of the polyvinylidene fluoride hollow fiber membrane is increased.

It is particularly important to prepare a membrane having antibacterial properties against membrane fouling caused by microorganisms such as bacteria . As an excellent membrane material, PVDF has a wide range of applications in the field of separation membranes. The microfiltration and ultrafiltration hollow fiber membranes prepared therefrom have achieved large-scale industrial production in household water purification systems, sewage treatment, seawater desalination and the like. However, in addition to organic and inorganic substances, microorganisms are also one of the main factors causing membrane fouling during the use of the membrane. ItaUozqa5X

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