β-Sialon ceramic hollow fiber membranes with high strength and low thermal conductivity for membrane distillation

Wang, Junwei; Li, Lin; Zhang, Jiangwei; Xu, Xin; Chen, Chusheng

doi:10.1016/j.jeurceramsoc.2015.09.027

Cited by 101 publications

(58 citation statements)

References 38 publications

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“…Table 3 reports the comparison of kaolin-alumina-3 in previous studies towards membrane gas permeation and hydrophobicity. As shown, the gas permeance value obtained in this work is comparable to other works on the effects of ceramic contents and sintering temperature [15,23,[27][28][29][30][31]. Therefore, it is suggested that kaolin-alumina possesses high permeability and high hydrophobicity at low cost due to the ceramic content used and the price of the material.…”

Section: Comparison With Previous Worksupporting

confidence: 80%

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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Section: Comparison With Previous Worksupporting

confidence: 80%

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

et al. 2017

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“…The final membrane prepared from the optimum condition shows a good flux of 32.3 L/m 2 -h at 60 °C feed temperature. Table 4 compares it with other VMD membranes made from various materials for seawater desalination [53][54][55][56][57][58].The newly designed membrane exhibits a superior flux owing to its unique morphology formed from a nature-mimetic surface structure. The microstructure control of MOF crystals and the hydrophobic floss growth have enabled the novel membrane for VMD applications.…”

Section: Effect Of Second Mof Growth Time On Membrane Performancementioning

confidence: 99%

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Zuo

Chung

2016

Water

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Nature-mimetic hydrophobic membranes with high wetting resistance have been designed for seawater desalination via vacuum membrane distillation (VMD) in this study. This is achieved through molecular engineering of metal-organic framework (MOF)-functionalized alumina surfaces. A two-step synthetic strategy was invented to design the hydrophobic membranes: (1) to intergrow MOF crystals on the alumina tube substrate and (2) to introduce perfluoro molecules onto the MOF functionalized membrane surface. With the first step, the surface morphology, especially the hierarchical roughness, can be controlled by tuning the MOF crystal structure. After the second step, the perfluoro molecules function as an ultrathin layer of hydrophobic floss, which lowers the surface energy. Therefore, the resultant membranes do not only possess the intrinsic advantages of alumina supports such as high stability and high water permeability, but also have a hydrophobic surface formed by MOF functionalization. The membrane prepared under an optimum condition achieved a good VMD flux of 32.3 L/m 2 -h at 60 • C. This study may open up a totally new approach for design of next-generation high performance membrane distillation membranes for seawater desalination.

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“…where and f C p C are the conductivities of the feed solution and permeate water, respectively [21,22].…”

Section: Water Desalinationmentioning

confidence: 99%

Preparation of high-efficiency ceramic planar membrane and its application for water desalination

Tao

et al. 2018

J Adv Ceram

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Highly efficient Si 3 N 4 ceramic planar membrane for water desalination process using membrane distillation was prepared by the dual-layer phase inversion tape casting and sintering method. In comparison with typical phase inversion tape casting method, the green tape was formed using Si 3 N 4 slurry on the top and graphite slurry on the bottom. After consuming away the graphite structure, a ceramic membrane consisting of a two-layered structure (skin and finger-like layers) was obtained. The skin layer was relatively tight, and thus could act as a functional layer for separation, while the finger-like layer contained straight open pores with a diameter of 100 μm, acting as a support with low transport resistance. For comparison, typical Si 3 N 4 ceramic membrane was fabricated by phase inversion technique without graphite substrate, resulting in a three-layered structure (skin, finger-like, and sponge layers). After membrane modification from hydrophilic to hydrophobic with polymer derived nanoparticle method, the water desalination performance of the membranes was tested using the sweeping gas membrane distillation (SGMD) with different NaCl feed solutions. With the increase of salt content from 4 to 12 wt%, the water flux decreased slightly while rejection rate maintained over 99.99%. Comparing with typical three-layered Si 3 N 4 membrane, an excellent water flux enhancement of over 83% was resulted and the rejection rate remained over 99.99%.

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β-Sialon ceramic hollow fiber membranes with high strength and low thermal conductivity for membrane distillation

Cited by 101 publications

References 38 publications

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

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

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Preparation of high-efficiency ceramic planar membrane and its application for water desalination

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