Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Study on Low Thermal-Conductivity of PVDF@SiAG/PET Membranes for Direct Contact Membrane Distillation Application

Version 1 : Received: 26 July 2023 / Approved: 26 July 2023 / Online: 27 July 2023 (07:26:20 CEST)

A peer-reviewed article of this Preprint also exists.

Xiang, J.; Wang, S.; Chen, N.; Wen, X.; Tian, G.; Zhang, L.; Cheng, P.; Zhang, J.; Tang, N. Study on Low Thermal-Conductivity of PVDF@SiAG/PET Membranes for Direct Contact Membrane Distillation Application. Membranes 2023, 13, 773. Xiang, J.; Wang, S.; Chen, N.; Wen, X.; Tian, G.; Zhang, L.; Cheng, P.; Zhang, J.; Tang, N. Study on Low Thermal-Conductivity of PVDF@SiAG/PET Membranes for Direct Contact Membrane Distillation Application. Membranes 2023, 13, 773.

Abstract

in order to enhance the separation performance and to reduce the heat loss of the transmembrane for membrane distillation, the thermal efficiency and hydrophobicity of the membrane distillation should be simultaneously enhanced. In this work, a PVDF/PET hydrophobic/hydrophilic membrane is prepared by non-solvent phase inducing method. Nanosized silica aerogel (SiAG) with high porosity is added to the composite membranes. The modifying effects and operating conditions on permeate flux and thermal efficiency in direct contact membrane distillation (DCMD) are investigated. Furthermore, the latent heat of vaporization and the heat transfer across the membranes are compared for SiAG addition, which indicates that the composite PVDF@SiAG/PET membranes display a great potential for distillation-separation application with high heat efficiency.

Keywords

non-solvent induce phase separation; hydrophobic/hydrophilic membrane; silica aerogel; low thermal-conductivity; membranes distillation

Subject

Chemistry and Materials Science, Applied Chemistry

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