Preparation And Characterization Of Cu-Zn/polysulfone Hollow Fiber Hybrid Membranes

Membrane separation technology is one of the most promising technology in the 21st century.In the membrane separation technology,organic-inorganic hybrid membrane has become a research hotspot in the field of membrane separation technology because of its characteristic of combinating excellent properties of organic and inorganic components.As well,the development of it also provides a new train of thought to membrane materials design and development.For making out a new membrane material which has large loading density,high permeability,high filtration precision,We selected the Cu-Zn metal powder and polysulfone polymer as the main raw materials,used phase inversion method,and finally got a new type of filling type hybrid membrane materials—Cu-Zn/polysulfone hollow fiber hybrid membrane-.The membrane material has the good performance of copper zinc alloy material and polysulfone material,As well,Cu-Zn metal materials combined with polysulfone material can improve its own shortcomings to each other.Firstly,we prepared different hollow fiber hybrid membranes which have different content of polysulfone and different content of Cu-Zn metal powder.Then we studied the preparation process and characterized performance of the membrane.And we get the following main conclusions.(1)It was found the casting solution viscosity was increased with the increase of content of polysulfone,Polysulfone content is 7.5 wt%,its viscosity was 38000 mPa.s,when the content of polysulfone was 11.5 wt%,its viscosity can be up to 23000 mPa.s.And the addition of a small amount of PVP can increase the viscosity of casting solution,improve the stability of the casting solution.At the same time,With the increase of polysulfone content in the casting solution,the membranes?density and bubble point pressure also increased gradually,Membranes?porosity and pure water flux decreased gradually,Membranes?structure was more compact,and membranes?mechanical properties was better.In terms of hydrophilic,the polysulfone had no impact to the membrane.(2)With the Cu-Zn metal powder content increase in the casting solution,The membranes density and pure water flux increased gradually,the bubble pressure decreased,the porosity first without too big change,after reduced gradually.Hole defect increased,mechanical performance degradation.In terms of hydrophilic,the addition of Cu-Zn metal powder can obviously improve the hydrophilicity of membrane.(3)And then we observed the membranes?removal effect to the Residual chlorine,suspension,bovine serum albumin,and e.coli.Under the filtering pressure is 0.1 MPa,It was found that membranes performance good to the 0.80 mg/L residual chlorine residual chlorine removal in aqueous solution,The highest residual chlorine removal efficiency can reach 96.1%,the effect to the diatomite slurry which average particle size is 3.53?m,concentration is 0.5mg/L is good,the minimum removal rate can reach 90.7%.The effect to get rid of bovine serum albumin is not very ideal,the highest removal rate only 66.7%.The effect to e.coli antibacterial performance is good,the removal rate can reach 99.99%.In order to improve the membrane filtration precision,finally,We researshed the Flak Cu-Zn metal powder on the properties of hollow fiber hybrid membrane.It was found Flak Cu-Zn metal powder had good dispersion performance and mechanical properties.Then we analyzed the removal effect of bovine serum albumin with different Flak Cu-Zn powder content.It was found the highest removal rate to bovine serum albumin is 69.8%,and at that moment,the membrane flux is 91.2 L/m~2·h.