Polysulfone(PSF) composite membrane with micro-reaction locations (MRLs) made by doping sulfated TiO 2 deposited on SiO 2 nanotubes (STSNs) for cleaning wastewater

Zhang, Yuqing; Liu, Pingli

doi:10.1016/j.memsci.2015.06.011

Cited by 41 publications

(13 citation statements)

References 27 publications

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“…The intensive use of polysulfones for the preparation of microporous, dense, and composite membranes is justified by the performance of these polymers [42,43,44], namely: high solubility in polar aprotic solvents and thus great possibilities to obtain membranes by phase inversion; thermal resistance up to approximately 200 °C; chemical resistance over the whole pH range and in oxidative environments; diffusion coefficient of 3.3 × 10 −11 cm 2 /s at 15 °C; mechanical resistance; and selectivity for gas mixtures. Performance enhancement and widening of polysulfone membrane applications have been amplified by including silica for obtaining micro- or nano-metric silica composites, but their synthesis is often costly, complicated, and non-reproducible [26,45,46,47,48].…”

Section: Discussionmentioning

confidence: 99%

Non-Resorbable Nanocomposite Membranes for Guided Bone Regeneration Based on Polysulfone-Quartz Fiber Grafted with Nano-TiO2

et al. 2019

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The polymer-inorganic nanoparticles composite membranes are the latest solutions for multiple physicochemical resistance and selectivity requirements of membrane processes. This paper presents the production of polysulfone-silica microfiber grafted with titanium dioxide nanoparticles (PSf-SiO2-TiO2) composite membranes. Silica microfiber of length 150–200 μm and diameter 12–15 μm were grafted with titanium dioxide nanoparticles, which aggregated as microspheres of 1–3 μm, applying the sol-gel method. The SiO2 microfibers grafted with nano-TiO2 were used to prepare 12% polysulfone-based nanocomposite membranes in N-methyl pyrrolidone through the inversion phase method by evaporation. The obtained nanocomposite membranes, PSf-SiO2-TiO2, have flux characteristics, retention, mechanical characteristics, and chemical oxidation resistance superior to both the polysulfone integral polymer membranes and the PSf-SiO2 composite membranes. The antimicrobial tests highlighted the inhibitory effect of the PSf-SiO2-TiO2 composite membranes on five Gram (-) microorganisms and did not allow the proliferation of Candida albicans strain, proving that they are suitable for usage in the oral environment. The designed membrane met the required characteristics for application as a functional barrier in guided bone regeneration.

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Section: Discussionmentioning

confidence: 99%

Non-Resorbable Nanocomposite Membranes for Guided Bone Regeneration Based on Polysulfone-Quartz Fiber Grafted with Nano-TiO2

et al. 2019

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“…Besides, electronic properties, polarizability and quadrupole moment, which we can be used for the extract gas, were also discussed. Table 1 shows the structure, polarizability and quadrupole moment of CO 2 and CH 4 gases [6]. Considering electronic properties of CO 2 and CH 4 gases, we can see that membrane surfaces, which have a higher polarity can absorb a higher polarizability and quadrupole moment gas more than of lower polarizability and quadrupole moment gas.…”

Section: Introductionmentioning

confidence: 97%

“…Table 1 shows the structure, polarizability and quadrupole moment of CO 2 and CH 4 gases [6]. Considering electronic properties of CO 2 and CH 4 gases, we can see that membrane surfaces, which have a higher polarity can absorb a higher polarizability and quadrupole moment gas more than of lower polarizability and quadrupole moment gas. Therefore, hydrophilic properties represent the polarity of membrane surfaces, which is the cause for CO 2 to permeate more through such a membrane than CH 4 .…”

Section: Introductionmentioning

confidence: 97%

“…As CO 2 gas is the main causes of greenhouse effect that leads to global warming, many attempts were made to develop an ideal membrane for CO 2 adsorption and separation [1]. Polysulfone (PSF) is one of the high potential and widely used polymers because it has many advantages such as excellent stability and resistivity to high temperature and acid-base environments and easy to be used for membrane making [2,3]. However, PSF is hydrophobic in nature [4].…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification of PSF/Tio2 Membranes Using Silane Coupling Agents and Dc Plasma Technique

2017

MJAS

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Preparation and surface modification of PSF/TiO 2 membranes by DC Ar-plasma were conducted to improve membrane hydrophilicity and gas permeation efficiency. Using TiO 2 as a photocatalyst, photocatalysis could be induced upon the plasma exposure. Radicals from this process led to an increase in the membrane hydrophilicity. In order to improve the dispersion quality of TiO 2 in an organic membrane, methyltrimethoxysilane (TMMS) or ethyltrimethoxysilane (TEMS) was utilized as coupling agents to modify the TiO 2 surface prior to blending. The coupling agents caused organic silane bonds on the TiO 2 surface leading to a better dispersion of nanoparticle on the membrane matrix. The incorporation of modified-TiO 2 tended to decrease membrane water contact angles (WCA) to the lowest value when compared with PSF membranes with unmodified TiO 2 and neat PSF membranes. Results also showed that TMMS could produce better outcomes compared to TEMS. It was found that the modified-TiO 2 could decrease the WCA. More importantly, pressure normalized flux of CO 2 and CH 4 gases of PSF/modified-TiO 2 membrane was found to increase with slightly decrease in the selectivity of CO 2 /CH 4 .Keywords: silane coupling agent, surface modification, gas separation membrane, low pressure DC-plasma, polysulfone Abstrak Penyediaan dan modifikasi permukaan membran PSF/TiO 2 oleh DC Ar-plasma telah dijalankan untuk meningkatkan kehidrofilikan membran dan kecekapan penyerapan gas. Menggunakan TiO 2 sebagai foto-pemangkin, fotopemangkinan dapat didorong apabila terdedah kepada plasma. Radikal daripada proses ini membawa kepada peningkatan dalam kehidrofilikan membran. Untuk meningkatkan kualiti penyebaran TiO 2 dalam membran organik, metiltrimetoksisilana (TMMS) atau etiltrimetoksisilana (TEMS) telah digunakan sebagai agen gandingan untuk mengubah suai permukaan TiO 2 sebelum campuran. Ejen-ejen gandingan menyebabkan ikatan silana organik di permukaan TiO 2 yang membawa kepada penyebaran nanopartikel yang lebih baik pada matriks membran. Penggabungan TiO 2 yang diubahsuai cenderung untuk mengurangkan sudut sentuhan air membran (WCA) kepada nilai yang paling rendah berbanding membran PSF dengan TiO 2 yang tidak diubahsuai dan membran PSF kawalan. Keputusan juga menunjukkan bahawa TMMS boleh menghasilkan hasil yang lebih baik berbanding PPSMI. Ia telah mendapati bahawa TiO 2 yang diubahsuai boleh mengurangkan WCA. Lebih penting lagi, tekanan fluks normal gas CO 2 dan CH 4 daripada membran PSF/TiO 2 yang diubahsuai didapati meningkat dengan sedikit penurunan kepilihan CO 2 /CH 4 .Kata kunci: ejen gandingan silana, modifikasi permukaan, membran pemisahan gas, tekanan rendah dc-plasma, polisulfon

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“…Meanwhile, these pore‐forming agents reduced the mechanical performance of UF membranes 27,29 . In addition, some hydrophilic inorganic materials have been used as additives to PSf UF matrix, such as titanium dioxide (TiO 2 ), 30 silica (SiO 2 ), 31 alumina (Al 2 O 3 ), 32 and zirconium dioxide (ZrO 2 ) 33 . However, it is difficult to increase nanoparticle concentration and dispersity in the membrane casting solution, which limited the application of these additives 30,32 .…”

Section: Introductionmentioning

confidence: 99%

A novel antifouling and thermally stable polysulfone ultrafiltration membranes with sulfobetaine polyimide as porogen

Sun

Wang

et al. 2020

Polymers for Advanced Techs

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Polysulfone ultrafiltration membranes were prepared with sulfobetaine polyimide (s‐PI) via phase inversion process, during which s‐PI migrated and enriched on the surfaces of membranes/pores due to its hydrophilic nature. Therefore, s‐PI not only enhanced surface hydrophilicity, but also acted as a pore‐forming agent. It was proved that the introduction of s‐PI effectively promoted membrane porosity and antifouling ability. Under optimized conditions, the pure water flux of blend membranes reached 220.58 L m−2 h−1 with a protein rejection ratio of 99.3%, and a flux recovery ratio of 90.86%, indicating the superior antifouling property and filtration performances of zwitterionic polymer blend membranes. Moreover, the blend membrane can stand a temperature of 90°C without degrading its separation performance. Besides excellent thermal stability, the blend membranes exhibited a distinctly advanced mechanical strength due to the addition of rigid s‐PI polymer. Overall, this study provided a facile and scalable method for the preparation of antifouling and thermally stable ultrafiltration membranes.

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Polysulfone(PSF) composite membrane with micro-reaction locations (MRLs) made by doping sulfated TiO 2 deposited on SiO 2 nanotubes (STSNs) for cleaning wastewater

Cited by 41 publications

References 27 publications

Non-Resorbable Nanocomposite Membranes for Guided Bone Regeneration Based on Polysulfone-Quartz Fiber Grafted with Nano-TiO2

Non-Resorbable Nanocomposite Membranes for Guided Bone Regeneration Based on Polysulfone-Quartz Fiber Grafted with Nano-TiO2

Surface Modification of PSF/Tio2 Membranes Using Silane Coupling Agents and Dc Plasma Technique

A novel antifouling and thermally stable polysulfone ultrafiltration membranes with sulfobetaine polyimide as porogen

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