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sur le développement des zones arides et semi-arides

Titre : Controllable Preparation and Fog Collection Performance of Copper Based Superhydrophobic-hydrophilic Composite Inerface Biomimetic Membrane

Auteur : 樊静秋

Grade : Master 2022

Université : Jiangsu University

Résumé partiel
Water collection in air is one of the effective ways to alleviate the global shortage of fresh water resources.Many animals and plants in nature have the ability to capture water from the air because of their unique structural characteristics,which provides inspiration for the design of biomimetic materials for water collection.Among them,desert beetle has the unique physiological structure of hydrophilic and hydrophobic on its back,and has the function of capturing and transporting water droplets,so it has excellent water collection ability.In recent years,superhydrophobic-hydrophilic composite interface materials imitating desert beetles have been gradually developed by inkjet printing,spray deposition,laser pulse and other methods.Developing new materials and preparation methods of biomimetic water collection and strengthening its water collection ability is a research hotspot at present.At the same time,when facing the actual complex and changeable environmental conditions,the durability or antibacterial function of bionic water collection materials also need to be paid attention to.Inspired by the unique structure and water collecting function of desert beetle,Cu O/Si O2based biomimetic membrane with high durability was prepared by two-step combustion and selective modification.Inspired by the water collection of desert beetles and the self-dripping of droplets on the cicada,Cu（OH）2 based double biomimetic membrane with nanowire array structure was prepared by wet oxidation,silylation and gel self-assembly methods.In order to further increase the hydrophilic nucleation sites,nano branch leaf array Cu（OH）2/Ba SO4 based double biomimetic membrane was prepared by wet oxidation,chemical deposition and selective modification.The surface microstructure,chemical composition,element distribution and wettability of biomimetic membrane were characterized by advanced instrument system.The water collection performance,stability and antibacterial performance of biomimetic membrane were systematically studied,and its structure-activity relationship was analyzed.The main research work is as follows:In this paper,taking the metal mesh as the matrix,the rough structure is formed on the surface of the metal mesh by combustion method,wet oxidation method and impregnation precipitation method.At the same time,the hydrophilic and hydrophobic modification is carried out by using the basic characteristics of copper base,so that the mesh surface is in a superhydrophobic state and contains hydrophilic water points.A series of superhydrophobic hydrophilic interface bionic hybrid metal mesh membranes are prepared.The microstructure、chemical composition and element distribution of the bionic hybrid membrane were characterized by SEM、XRD、XPS and other instruments

Mots clés : Water collection ;Composite wetted interface ;Biomimetic membrane ;Combustion method ;Selective modification ;

Présentation (CNKI)