Surface modification of nanostructured ceramic membranes for direct contact membrane distillation

Hendren, Zachary; Brant, Jonathan A.; Wiesner, Mark R.

doi:10.1016/j.memsci.2008.11.038

Cited by 176 publications

(82 citation statements)

References 33 publications

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“…To date, the highest flux obtained for the ceramic membranes were obtained for alumina silanised membranes at feed and permeate temperatures of 53 °C and 18 °C, respectively [246]. Despite their lower pore size, these inorganic membranes did not exhibit a very high contact angle (141°) when compared with other membranes (up to 175° as shown in [244]).…”

Section: Performance Of Inorganic Membranesmentioning

confidence: 95%

“…The materials exhibit high surface energy and are therefore naturally hydrophilic, requiring functionalisation with hydrophobic groups in order to satisfy MD requirements [244,245]. Short aliphatic oligomers, alkoxy-silanes or fluoro-polymers can be easily grafted onto the surface of the membrane following a sol-gel approach, where the hydroxyl groups naturally present on the metal oxide are used to react with functional groups of the oligomers [242,[246][247][248].…”

Section: Ceramic Membranesmentioning

confidence: 99%

“…Although most of the membranes studied were symmetric, the best performing membranes were asymmetric, being surface grafted fluoro-silanised alumina membranes [246]. These membranes gave fluxes up to 8.1 kg m…”

Section: Ceramic Membranesmentioning

confidence: 99%

See 2 more Smart Citations

Advances in Membrane Distillation for Water Desalination and Purification Applications

Camacho

Dumée

Zhang

et al. 2013

Water

635

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: Performance Of Inorganic Membranesmentioning

confidence: 95%

Section: Ceramic Membranesmentioning

confidence: 99%

See 1 more Smart Citation

Advances in Membrane Distillation for Water Desalination and Purification Applications

Camacho

Dumée

Zhang

et al. 2013

Water

635

342

View full text Add to dashboard Cite

show abstract

“…Likewise, a different chain of alkyltricholrosilanes with tail length from C1-C8 can be functionalized on the AAO nanopores [19]. Modification of membrane consists of silane with fluoro tails, i.e., perfluorodecydimethylchlorosilane has changed the wettability of the membrane from 20 to 160° [20,21]. Other approach employed PEG-silane that is formed by reacting PEG-silicon tetrachloride in the presence of triethylamine as a catalyst.…”

Section: Silanizationmentioning

confidence: 99%

Soft and Hard Surface Manipulation of Nanoporous Anodic Aluminum Oxide (AAO)

et al. 2015

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Nanoporous materials with straight channels have attracted considerable interest due to their unique physical properties and many potential applications such as separation, sensing, biomedical and electronics. For the last few decades, nanoporous alumina or anodic aluminium oxide (AAO) membrane is gaining attention due to its broad applicability in various applications. The unique properties of AAO membrane coupled with tunable surface modification and properties is playing an increasingly important platform in a diverse range of applications such as separation, energy storage, drug delivery and template synthesis, as well as biosensing, tissue engineering and catalytic studies. This chapter aims to introduce the recent advances and challenges for surface manipulation of AAO following the 'soft' and 'hard' modification strategies. The functions of these modified nanostructures materials and latest important applications are evaluated with respect to improved performance and possible implications of those strategies for the future trends of surface engineering are discussed.

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“…[1][2][3] In these applications, the membrane primarily functions as a separator of two bulk phases, and controls mass transfer between the phases. An important advantage of membrane separation techniques is that they allow the simultaneous extraction and enrichment of analytes, and typically facilitate selective extraction at trace levels while consuming only small quantities of solvent.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Membrane Interface for Analysis of Air Samples Using Time-of-flight Mass Spectrometry

Jang¹,

Oh²,

Park³

et al. 2010

Bulletin of the Korean Chemical Society

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In the present study, we constructed a membrane inlet assembly for selective permeation of volatile airborne organic compounds for subsequent analysis by time-of-flight mass spectrometry. The time-dependent diffusion of analytes through a 75 µm thick polydimethylsiloxane membrane was measured by monitoring the ion signal after a step change in the sample concentration. The results fit well to a non-steady-state permeation equation. The diffusion coefficient, response time, and sensitivity were determined experimentally for a range of polar (halogenated) and nonpolar (aromatic) compounds. We found that the response times for several volatile organic compounds were greatly influenced by the alkyl chain length as well as the size of the substituted halogen atoms. The detection limits for benzene, ethylbenzene, and 2-propanol were 0.2 ppm, 0.1 ppm, and 3.0 ppm by volume, respectively, with a linear dynamic range greater than three orders of magnitude. These results indicate that the membrane inlet/time-of-flight mass spectrometry technique will be useful for a wide range of applications, particularly for in situ environmental monitoring.

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Surface modification of nanostructured ceramic membranes for direct contact membrane distillation

Cited by 176 publications

References 33 publications

Advances in Membrane Distillation for Water Desalination and Purification Applications

Advances in Membrane Distillation for Water Desalination and Purification Applications

Soft and Hard Surface Manipulation of Nanoporous Anodic Aluminum Oxide (AAO)

Characterization of a Membrane Interface for Analysis of Air Samples Using Time-of-flight Mass Spectrometry

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