Effects of diluent molecular weight on the performance of hydrophilic poly(vinyl butyral)/Pluronic F127 blend hollow fiber membrane via thermally induced phase separation

Qiu, Yun-Ren; Matsuyama, Hideto; Gao, Guoying; Ou, Yang-Wei; Miao, Chang

doi:10.1016/j.memsci.2009.04.013

Cited by 55 publications

(3 citation statements)

References 34 publications

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“…Thus, the dual functions of Pluronic (surface modifier and pore former) make it attractive particularly when Pluronic F127 is used . For example, Pluronic F127 was blended with different polymer(s) such as poly(ether sulfone), poly(vinylidene fluoride), cellulose acetate, and poly(vinyl butyral) to develop an UF membrane with improved hydrophilicity and antifouling activities. Based on the above concept, Pluronic F127 was chosen as a macromolecular additive in this study and blended into the casting dope of PEI to prepare novel PEI membranes with the amphiphilic copolymer at the membrane surface, with enhanced UF performance by means of increasing the flux and antifouling properties of the membrane.…”

Section: Introductionmentioning

confidence: 99%

Removal of BSA and HA Contaminants from Aqueous Solution Using Amphiphilic Triblock Copolymer Modified Poly(ether imide) UF Membrane and Their Fouling Behaviors

Kanagaraj

Neelakandan

Nagendran

et al. 2015

Ind. Eng. Chem. Res.

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Amphiphilic triblock copolymer (Pluronic F127) was used as a macromolecular additive to modify the surface of poly(ether imide) (PEI) ultrafiltration (UF) membranes with additive contents from 0 to 3 wt % in the casting solution. The surface modification of the membranes was confirmed by Fourier transform infrared spectroscopy and contact angle measurements. The membranes were also characterized by scanning electron microscopy, UF of proteins, and flux recovery. A membrane with the highest Pluronic (3 wt %) in PEI exhibited the highest pure water flux, highest water content, and lowest membrane hydraulic resistance. It exhibited high UF fluxes of 170 and 180 L m −2 h −1 at 345 kPa, for 1.0 g/L bovine serum albumin (BSA) in phosphate buffer solution and 1.0 g/L humic acid (HA) in deionized water feed solutions, with solute rejections of 84 and 82%, respectively. It also showed that the blended membranes with 3 wt % Pluronic content had a higher flux recovery ratio (92.4 and 89.4%), slightly higher reversible fouling (25.8 and 18.8%), and lower irreversible fouling (7.6 and 10.6%) after the UF of BSA and HA solute separation. This explained their low fouling behaviors compared to the neat PEI membranes.

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Section: Introductionmentioning

confidence: 99%

Removal of BSA and HA Contaminants from Aqueous Solution Using Amphiphilic Triblock Copolymer Modified Poly(ether imide) UF Membrane and Their Fouling Behaviors

Kanagaraj

Neelakandan

Nagendran

et al. 2015

Ind. Eng. Chem. Res.

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“…The solvent can later be removed by rinsing or evaporation to yield the final porous structure. With this process, porous fibers from a variety of polymers have been produced 16 – 20 ; however, they are generally made from a single material in a cylindrical geometry and are intrinsically passive. In this study, we report on the fabrication of complex fiber architectures with multiple materials organized around a porous domain, paving the way towards new types of active multifunctional porous fiber devices, such as flow-sensing filtration fibers, sweat sensing textiles or electrically active cell scaffolds.…”

Section: Introductionmentioning

confidence: 99%

Thermally-drawn fibers with spatially-selective porous domains

et al. 2017

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The control of mass transport using porous fibers is ubiquitous, with applications ranging from filtration to catalysis. Yet, to date, porous fibers have been made of single materials in simple geometries, with limited function. Here we report the fabrication and characterization of thermally drawn multimaterial fibers encompassing internal porous domains alongside non-porous insulating and conductive materials, in highly controlled device geometries. Our approach utilizes phase separation of a polymer solution during the preform-to-fiber drawing process, generating porosity as the fiber is drawn. Engineering the preform structure grants control over the geometry and materials architecture of the final porous fibers. Electrical conductivity of the selectrolyte-filled porous domains is substantiated through ionic conductivity measurements using electrodes thermally drawn in the cross-section. Pore size tunability between 500 nm–10 µm is established by regulating the phase separation kinetics. We further demonstrate capillary breakup of cylindrical porous structures porous microspheres within the fiber core.

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“…Various parameters such as thermodynamic factors, crystallization kinetics, diluent specifications e.g. crystallization temperature, mobility and molecular weight [26][27][28][29][30][31][32], solution viscosity [3], molecular weight distribution, polymer hydrophilicity [37] or hydrophobicity [38], cooling conditions [39,40] and the existence of nucleation agents [41] have been studied in order to find out the structural specifications of the membrane.…”

Section: Introductionmentioning

confidence: 99%

Full-Factorial Experimental Design to Determine the Impacts of Influential Parameters on the Porosity and Mechanical Strength of LLDEP Microporous Membrane Fabricated via Thermally Induced Phase Separation Method

Yegani¹

2012

J. Memb. Separ. Tech.

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Membrane separation processes have a wide application in liquid and gas purification industries. They enjoy advantages such as convenient processibility, easy and lower production and operational costs. Thermally induced phase separation (TIPS) process, due to its wide advantages, has won special attention in recent decades. In this process, a homogenous solution of polymer-diluent at a temperature above the polymer melting point is formed and the solution is then cast in the favorite shape. In order to create a porous structure, the diluent is extracted. In this work, microporous LLDPE membrane is fabricated and full factorial experimental design is used to evaluate the individual as well as mutual impacts of polymer concentration, membrane thickness and cooling bath temperature on the porosity and mechanical strength of the membrane. The results obtained from the analysis of variance of membrane porosity and mechanical strength, showed that the impact of cooling bath temperature is much more important than polymer concentration and membrane thickness. Higher cooling bath temperature, lower polymer concentration and membrane thickness result in higher porosity.

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Effects of diluent molecular weight on the performance of hydrophilic poly(vinyl butyral)/Pluronic F127 blend hollow fiber membrane via thermally induced phase separation

Cited by 55 publications

References 34 publications

Removal of BSA and HA Contaminants from Aqueous Solution Using Amphiphilic Triblock Copolymer Modified Poly(ether imide) UF Membrane and Their Fouling Behaviors

Removal of BSA and HA Contaminants from Aqueous Solution Using Amphiphilic Triblock Copolymer Modified Poly(ether imide) UF Membrane and Their Fouling Behaviors

Thermally-drawn fibers with spatially-selective porous domains

Full-Factorial Experimental Design to Determine the Impacts of Influential Parameters on the Porosity and Mechanical Strength of LLDEP Microporous Membrane Fabricated via Thermally Induced Phase Separation Method

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