Modified superhydrophilic/underwater superoleophobic mullite fiber-based porous ceramic for oil-water separation. (November 2021)

• Record Type: Journal Article
• Authors: Yuan, Lei; Wen, Tianpeng; Jiang, Linyang; Liu, Zhenli; Tian, Chen; Yu, Jingkun
• Is Part Of: Materials research bulletin. Volume 143(2021)
• Publication Date: 2021-11
• Subjects: Mullite fibers-based porous ceramics -- PDA coating -- Superhydrophilic -- Underwater superoleophobic -- Oil-water separation; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2021.111454
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: Mullite fiber-based porous ceramic is used ad matrix material for preparing the super-wetting membrane. PDA coating is fabricated by bionic surface grafting technology as superhydrophilic/underwater superhydrophobic membrane. Application well in the oil-water separation. Abstract: This work proposed a new strategy for preparing a superhydrophilic/underwater superoleophobic material based on mullite fiber-based porous ceramic as the matrix and polyethylenepolyamine (PEPA) with high surface energy as the coating material. The PEPA-DA (PDA) coating used as the superhydrophilic/underwater superoleophobic membrane was fabricated via the bionic surface grafting technology. Dopamine (DA) was used as a binder to graft PEPA onto the surface and into the pores of the matrix material to in situ form a PDA coating that has a multi-level structure. The prepared mullite ceramic/PDA coating could be used to separate oil/water mixtures with short separation time and high efficiency. Consequently, the mullite fiber-based porous ceramic was considered to be a novel substitutional matrix material for preparing the super-wetting membrane. Graphical abstract: In this work, we proposed a new strategy for preparing the superhydrophilic/underwater superhydrophobic membrane based on the mullite fiber-based porous ceramic as the matrix. The superhydrophilic/underwater superhydrophobic membrane was fabricated via the bionic surface grafting technology, where the polyethylenepolyamine (PEPA) with high surface energy was grafted onto the surface and pore of the matrix material with dopamine (DA) as binder to in-situ form the PDA coating with a multi-level structure. The prepared mullite ceramic/PDA coating could be used to separating the oil/water mixtures with short separation time and high efficiency. The present work indicated that the mullite fiber-based porous ceramic was considered to be a novel substitutional matrix material for preparing the super-wetting membrane. Image, graphical abstract