Preparation and characterization of hydrophobic ceramic hollow fibre membrane

Koonaphapdeelert, Sirichai; Li, K.

doi:10.1016/j.memsci.2006.12.039

Cited by 138 publications

(100 citation statements)

References 35 publications

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“…The advantages of ceramic membranes over organic membranes are associated with their mechanical stability over large pH ranges and when exposed to aggressive chemical environments. The membranes can, furthermore, be applied with a range of organic solvents without enduring strong degradation [202,243], whereas most polymeric materials are not suitable for use with chemically aggressive feeds [241].…”

Section: Ceramic Membranesmentioning

confidence: 99%

Advances in Membrane Distillation for Water Desalination and Purification Applications

Camacho

Dumée

Zhang

et al. 2013

Water

624

342

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Membrane distillation is a process that utilizes differences in vapor pressure to permeate water through a macro-porous membrane and reject other non-volatile constituents present in the influent water. This review considers the fundamental heat and mass transfer processes in membrane distillation, recent advances in membrane technology, module configurations, and the applications and economics of membrane distillation, and identifies areas that may lead to technological improvements in membrane distillation as well as the application characteristics required for commercial deployment. Keywordsa function of temperature, vapor pressure, and of the gas molecular mass K 0 membrane characteristic defined by Equation (9) Kn Knudsen number K(T) a function of temperature and molecular weight of the gas l mean free path of the molecules l m distance between parallel spacer fibres (m) LEP Limit Entry Pressure (kPa) M molecular mass (g/mol) M w molecular weights of water (g/mol) M a molecular weights of air (g/mol) n number of CNTs per unit cross section in bucky-paper P pressure in the air gap (kPa) half time to reach the maximum intensity-laser flash technique (s) t proportion of conductive heat (balance due to evaporative heat) loss through the membrane T mean temperature in the pores (K)

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Section: Ceramic Membranesmentioning

confidence: 99%

Advances in Membrane Distillation for Water Desalination and Purification Applications

Camacho

Dumée

Zhang

et al. 2013

Water

624

342

View full text Add to dashboard Cite

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“…Ceramic membrane is hydrophilic in nature owing to the O-H group on the membrane surface [12]. Hence in order to make the membrane surface hydrophobic, the chemical modification needs to be applied.…”

Section: Introductionmentioning

confidence: 99%

“…As well, the structure of metal oxides such as alumina allows for the surface modification. For instance, a maximum contact angle of 120° was reached by the modification of alumina hollow fibre membrane [12]. Surface modification of yittria-stabilized zirconia (YSZ) was possible after pre-treatment of the surface [18].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of affordable hydrophobic ceramic hollow fibre membrane for contacting processes

et al. 2017

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Affordable hydrophobic hollow fibre membranes were prepared using kaolin and alumina based ceramic powders via a combined phase inversion and sintering technique, followed by a grafting with fluoroalkylsilane (FAS). The crux of the matter in this paper is to study the changes in the properties of the hollow fibre membranes (gas permeation, mechanical strength, pore size, porosity, tortuosity, morphology, and contact angle) by the addition of alumina (Al 2 O 3 ) to the pure kaolin with mono or multiparticle sizes. By varying the overall loading and particle size of alumina addition, different morphologies of the membranes were obtained due to the differences in the path lengths during phase inversion process for each solvent and nonsolvent exchange. The successful grafting with FAS was evidenced by the increase in contact angle from nearly equal to zero degree before grafting to 140° after grafting. Kaolin-alumina-4, one of the hollow fibres fabricated in this work, achieved a mean pore size of 0.25 µm with the bending strength of 96.4 MPa and high nitrogen permeance of 2.3×10 5 mol·m 2 ·Pa 1 ·s 1 , which makes the hollow fibre most suitable for the membrane contactor application.

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“…Previous work in our research group has used ceramic fibers as a catalyst support structure [27,28], and hollow fibers have been shown to have a higher surface area when compared to solid fibers [18], which can of benefit to improve performance of supported catalysts. Other applications may include filtration media and membranes on a smaller scale than other alumina tube membranes [29,30] to take advantage of the increased surface area from electrospun fibers. The calcination temperature and ramping rate can be used to control the crystal grain size and structure [31].…”

Section: Discussionmentioning

confidence: 99%

Core–Shell Electrospun Hollow Aluminum Oxide Ceramic Fibers

Rajala

Shin

Lolla

et al. 2015

Fibers

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Abstract:In this work, core-shell electrospinning was employed as a simple method for the fabrication of composite coaxial polymer fibers that became hollow ceramic tubes when calcined at high temperature. The shell polymer solution consisted of polyvinyl pyrollidone (PVP) in ethanol mixed with an aluminum acetate solution to act as a ceramic precursor. The core polymer was recycled polystyrene to act as a sacrificial polymer that burned off during calcination. The resulting fibers were analyzed with X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) to confirm the presence of gamma-phase aluminum oxide when heated at temperatures above 700 °C. The fiber diameter decreased from 987 ± 19 nm to 382 ± 152 nm after the calcination process due to the polymer material being burned off. The wall thickness of these fibers is estimated to be 100 nm.

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Preparation and characterization of hydrophobic ceramic hollow fibre membrane

Cited by 138 publications

References 35 publications

Advances in Membrane Distillation for Water Desalination and Purification Applications

Advances in Membrane Distillation for Water Desalination and Purification Applications

Fabrication and characterization of affordable hydrophobic ceramic hollow fibre membrane for contacting processes

Core–Shell Electrospun Hollow Aluminum Oxide Ceramic Fibers

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