Preparation and characterization of PFTS grafted alumina supported zirconia (ASZ) membrane for removal of phenol from aqueous solution

Li, Dan; Liu, Bing; Sun, Hongqi; Yao, Jie; Agtmaal, Sjack van; Feng, Cuimin

doi:10.1016/j.apsusc.2019.144608

Cited by 23 publications

(6 citation statements)

References 41 publications

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“…In a hydrophobic PV process, the polymeric membranes that grafted through chemical modification with 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFTS) were utilized. Asymmetric alumina supported zirconia grafted 1H,1H,2H,2H-perfluorodecyltriethoxysilane membranes were successfully prepared by Li et al [ 27 ]. The effects of PFTS concentration, different solvents and alkali pretreatment on the hydrophobicity of the membrane surface were investigated, as shown in Figure 5 b.…”

Section: Synthesis Types and Properties Of Polymeric Pv Membranesmentioning

confidence: 99%

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Fabrication, Properties, Performances, and Separation Application of Polymeric Pervaporation Membranes: A Review

Wang

et al. 2020

Polymers

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Membrane separation technologies have attracted great attentions in chemical engineering, food science, analytical science, and environmental science. Compared to traditional membrane separation techniques like reverse osmosis (RO), ultrafiltration (UF), electrodialysis (ED) and others, pervaporation (PV)-based membrane separation shows not only mutual advantages such as small floor area, simplicity, and flexibility, but also unique characteristics including low cost as well as high energy and separation efficiency. Recently, different polymer, ceramic and composite membranes have shown promising separation applications through the PV-based techniques. To show the importance of PV for membrane separation applications, we present recent advances in the fabrication, properties and performances of polymeric membranes for PV separation of various chemicals in petrochemical, desalination, medicine, food, environmental protection, and other industrial fields. To promote the easy understanding of readers, the preparation methods and the PV separation mechanisms of various polymer membranes are introduced and discussed in detail. This work will be helpful for developing novel functional polymer-based membranes and facile techniques to promote the applications of PV techniques in different fields.

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Section: Synthesis Types and Properties Of Polymeric Pv Membranesmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Fabrication, Properties, Performances, and Separation Application of Polymeric Pervaporation Membranes: A Review

Wang

et al. 2020

Polymers

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“…Perfluorosiloxane is a generally utilized hydrophobization modifier, which can significantly reduce the surface free energy of the structure after being grafted with perfluoroalkyl groups. 16,17 At the same time, with the help of the efficient solvent diffusion inside gels, the interior and surface of the solid network composed of ANFs/PVA have the opportunity to achieve hydrophobic modification. Finally, through supercritical carbon dioxide drying, robust hydrophobic ANFs/PVA/ PFOTES composite aerogels can be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…In comparison to typical silica aerogels, which have fragile properties, 15 ANFs/PVA aerogels offer a great deal of potential in research and application fields. Perfluorosiloxane is a generally utilized hydrophobization modifier, which can significantly reduce the surface free energy of the structure after being grafted with perfluoroalkyl groups 16,17 . At the same time, with the help of the efficient solvent diffusion inside gels, the interior and surface of the solid network composed of ANFs/PVA have the opportunity to achieve hydrophobic modification.…”

Section: Introductionmentioning

confidence: 99%

Robust hydrophobic modification of para‐aramid nanofibers/polyvinyl alcohol composite aerogels with 1H,1H,2H,2H‐perfluorooctyltriethoxysilane

Ren

Hasuo

Tabata

et al. 2022

J of Applied Polymer Sci

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Aerogels are frequently exposed to moisture or come into direct contact with water in real-world applications, posing a threat to their stable performance. Herein, based on the characteristic that the liquid phase can efficiently diffuse in the solid cross-linked network of gels, a robust hydrophobic modification approach for paraaramid nanofibers/polyvinyl alcohol (ANFs/PVA) composite aerogels with 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFOTES) is demonstrated. The type of solvent, the concentration of hydrochloric acid (HCl) required promoting PFOTES hydrolysis, and the treatment time for hydrophobic modification are discussed individually. The ANFs/PVA/PFOTES aerogels with a water contact angle of 131.0 were obtained through supercritical fluid drying employing acetone as the solvent, with a concentration of 0.1 mol/L HCl of 0.35 vol%, and a treatment duration of 2 h. The hydrogen bond between ANFs and PVA, and the grafting of PFOTES on PVA have both been verified by Fourier-transform infrared spectroscopy. The porous structure of the modified aerogels was improved simultaneously, according to scanning electron microscope and Brunauer-Emmett-Teller characterizations.With the help of a thermal imaging camera, ANFs/PVA/PFOTES aerogels exhibit stable thermal insulation capability in low temperature and humid environments, which holds great promise for a wide range of applications.

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“…It is more difficult to recover phenol from the aqueous solution because the radius of a phenol molecule (0.6 nm) is larger than that of a water molecule (0.27 nm) . At present, there are many methods to recover phenol from aqueous solution, such as adsorption, , electrodialysis, photocatalytic, biodegradation, , ultrasound-assisted electrochemical, ozone oxidation, and membrane separation technology. − However, these methods suffer from the problems of high cost, high energy consumption, easy to cause secondary pollution, and/or poor selectivity. Hence, it is an urgent need to find efficient technologies to recover phenolic compounds from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of PEBA/HZIF-8 Pervaporation Membranes for High Efficiency Phenol Recovery

et al. 2022

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Phenol and its chemical derivatives serve as essential chemical materials are indispensable for the synthesis of many kinds of polymers. However, they are highly toxic, carcinogenic, difficult to be degraded biologically, and often found in aqueous effluents. Recovery of hazardous phenol from wastewater remains a daunting challenge. Herein, we prepared a hybrid membrane containing polyether block amide (PEBA) matrix and HZIF-8 fillers. To improve the compatibility between ZIF-8 and PEBA, ZIF-8 was modified by using polystyrene (PS) as a template to prepare porous HZIF-8. ZIF-8, composed of zinc nodes linked by the imidazole ring skeleton, is a kind of inorganic material with high hydrothermal stability, ordered pores, and hydrophobic microporous surfaces, which has a wide range of applications in membrane separation. The separation performance of the PEBA/HZIF-8 based membranes for phenol/water is improved due to the presence of PS on the surface of HZIF-8 and the imidazole ring skeleton in ZIF-8, which enhance the π–π interaction between HZIF-8 and phenol molecules. The effects of HZIF-8 content, feed phenol concentration, and feed temperature on the pervaporation performance of PEBA/HZIF-8 membranes were further investigated. The results showed that the pervaporation performance of the PEBA/HZIF-8-10 membrane was promising with a separation factor of 80.89 and permeate flux of 247.70 g/m 2 ·h under the feed phenol concentration of 0.2 wt % at 80 °C. In addition, the PEBA/HZIF-8-10 membrane presented excellent stability, which has great prospect for practical application in phenol recovery from waste water.

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Preparation and characterization of PFTS grafted alumina supported zirconia (ASZ) membrane for removal of phenol from aqueous solution

Cited by 23 publications

References 41 publications

Fabrication, Properties, Performances, and Separation Application of Polymeric Pervaporation Membranes: A Review

Fabrication, Properties, Performances, and Separation Application of Polymeric Pervaporation Membranes: A Review

Robust hydrophobic modification of para‐aramid nanofibers/polyvinyl alcohol composite aerogels with 1H,1H,2H,2H‐perfluorooctyltriethoxysilane

Fabrication of PEBA/HZIF-8 Pervaporation Membranes for High Efficiency Phenol Recovery

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