Role of functional nanoparticles to enhance the polymeric membrane performance for mixture gas separation

Role of functional nanoparticles to enhance the polymeric membrane performance for mixture gas separation

To improve the water vapor/gas separation the hydroxylated TiO2 (OH-TiO2) nanopartilces have beensynthesized and surface of polysulfone (PSf) hollowfiber membrane (HFM) has been coated as thinfilmnanocomposite (TFN) membranes. To remove the water vapor from mixture gas, hollowfiber membranehas been fabricated and while coating, the OH-TiO2 nanoparticles have been incorporated in the mphenylenediamine(MPD) solution to make TFN membrane. Aqueous MPD—OH-TiO2 nanoparticles mixsolutions and organic trimesoyl chloride (TMC) were used to prepare the TFN membranes on the surfaceof the PSf HFM substrate. Pristine TiO2 surface was modified to initiate functional groups on the TiO2surface to increase the hydrophilicity of the nanoparticles. Fourier transform infrared (FT-IR)spectroscopy was used to confirm the hydroxylation of TiO2 nanoparticles. The membranes were wellcharacterized using different physicochemical characterization techniques. The membrane performanceswere evaluated based on water vapor permeance, selectivity, water vaporflux and water vaporremoval efficiency. Obtained experimental results designated that the incorporated OH-TiO2 nanoparticleswere dispersed well while interfacial polymerization in the TFN layer and their additionenhanced membrane performances. With an increasing concentration of OH-TiO2 nanoparticles from0.025 to 0.2 wt.% compare with MPD solution during the fabrication, water vapor permeance andselectivity significantly enhanced due to the amplified water vapor permeation corridors afforded by themodified OH-TiO2 nanoparticles. After increasing the concentration of OH-TiO2 more than 0.2 wt.% in themonomer solution the agglomeration was started. The results revealed that the addition of modifiedhydroxylated TiO2 in MPD solution up to 0.2 w/w% (membrane sample TFN-4 (MT(0.5, 0.2)-OH-TiO2-0.2))increased the permeateflux and showed the best permeance 1396 GPU and selectivity 510 among the allprepared membranes.

To improve the water vapor/gas separation the hydroxylated TiO2 (OH-TiO2) nanopartilces have beensynthesized and surface of polysulfone (PSf) hollowfiber membrane (HFM) has been coated as thinfilmnanocomposite (TFN) membranes. To remove the water vapor from mixture gas, hollowfiber membranehas been fabricated and while coating, the OH-TiO2 nanoparticles have been incorporated in the mphenylenediamine(MPD) solution to make TFN membrane. Aqueous MPD—OH-TiO2 nanoparticles mixsolutions and organic trimesoyl chloride (TMC) were used to prepare the TFN membranes on the surfaceof the PSf HFM substrate. Pristine TiO2 surface was modified to initiate functional groups on the TiO2surface to increase the hydrophilicity of the nanoparticles. Fourier transform infrared (FT-IR)spectroscopy was used to confirm the hydroxylation of TiO2 nanoparticles. The membranes were wellcharacterized using different physicochemical characterization techniques. The membrane performanceswere evaluated based on water vapor permeance, selectivity, water vaporflux and water vaporremoval efficiency. Obtained experimental results designated that the incorporated OH-TiO2 nanoparticleswere dispersed well while interfacial polymerization in the TFN layer and their additionenhanced membrane performances. With an increasing concentration of OH-TiO2 nanoparticles from0.025 to 0.2 wt.% compare with MPD solution during the fabrication, water vapor permeance andselectivity significantly enhanced due to the amplified water vapor permeation corridors afforded by themodified OH-TiO2 nanoparticles. After increasing the concentration of OH-TiO2 more than 0.2 wt.% in themonomer solution the agglomeration was started. The results revealed that the addition of modifiedhydroxylated TiO2 in MPD solution up to 0.2 w/w% (membrane sample TFN-4 (MT(0.5, 0.2)-OH-TiO2-0.2))increased the permeateflux and showed the best permeance 1396 GPU and selectivity 510 among the allprepared membranes.