김혜원 Lee Seung Heon 정성필 변지혜 2024-01-19T12:02:02Z 2024-01-19T12:02:02Z 2022-06-30 2022-05 2289-0971 https://pubs.kist.re.kr/handle/201004/115184 Membrane distillation (MD) has emerged as a sustainable desalination technology to solve the water and energy problems faced by the modern society. In particular, the surface wetting properties of the membrane have been recognized as a key parameter to determine the performance of the MD system. In this study, a novel surface modification technique was developed to induce a Janus-type hydrophilic/hydrophobic layer on the membrane surface. The hydrophilic layer was created on a porous PVDF membrane by vapor phase polymerization of the pyrrole monomer, forming a thin coating of polypyrrole on the membrane walls. A rigid polymeric coating layer was created without compromising the membrane porosity. The hydrophilic coating was then followed by the in-situ growth of siloxane nanoparticles, where the condensation of organosilane provided quick loading of hydrophobic layers on the membrane surface. The composite layers of dual coatings allowed systematic control of the surface wettability of porous membranes. By the virtue of the photothermal property of the hydrophilic polypyrrole layer, the desalination performance of the coated membrane was tested in a solar MD system. The wetting properties of the dual-layer were further evaluated in a direct-contact MD module, exploring the potential of the Janus membrane structure for effective and low-energy desalination. Korean 한국물환경학회 막증류 담수화를 위한 친수성/소수성 이중 표면 코팅 Hydrophilic/Hydrophobic Dual Surface Coatings for Membrane Distillation Desalination Article 10.15681/KSWE.2022.38.3.143 2 한국물환경학회지, v.38, no.3, pp.143 - 149 한국물환경학회지 38 3 143 149 Y kci ART002845420 Organosilane Polypyrrole Surface functionalization Hydrophilicity Hydrophobicity Membrane distillation