Pre‑oxidized PAN Nanofibrous Membrane to Efficiently and Continuously Separate Large‑Scale Viscous Oil‑in‑Water Emulsions Under Harsh Conditions with Ultra‑Long‑Term Oil‑Fouling Recovery  

作　　者：Hongwei Su Hua Hu Zhenyu Li Guilong Yan Li Wang Dong Xiang Chunxia Zhao Yuanpeng Wu Jingyu Chen Ce Wang 

机构地区：[1]The Center of Functional Materials for Working Fluids of Oil and Gas Field,School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China [2]Sichuan Engineering Technology Research Center of Basalt Fiber Composites Development and Application,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China [3]PetroChina Southwest Oil and Gas Field Company Exploration Division,Chengdu 610500,China [4]Alan G.MacDiarmid Institute,College of Chemistry,Jilin University,Changchun 130012,China

出　　处：《Advanced Fiber Materials》2024年第3期852-864,共13页先进纤维材料（英文）

基　　金：supported by the National Natural Science Foundation of China(No.52073238 and 52173301);Open Funds of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(PLN202205,SWPU);Natural Science Foundation of Sichuan Province(2022NSFSC0356).

摘　　要：High-performance multifunctional filtration membranes are highly required in treating practically complex oily wastewater systems,but still a challenge unsolved.Herein,we propose a facile route to address these challenges simultaneously by simply constructing electrospun pre-oxidized polyacrylonitrile nanofibrous membrane(p-PAN NM).Given the pre-oxidation process,the p-PAN NM displays not only robust anti-corrosive tolerance against diverse corrosive media,but also superhydrophilicity/underwater superoleophobicity.Additionally,~99%separation efficiency,~100%oil-fouling recovery,and ultralong service life(up to 265 h)have been realized in separating large-scale surfactant stabilized soybean/crude oil-in-water emulsions.Furthermore,strong anti-corrosive performance against various corrosive media(e.g.,1 M HCl,1 M NaOH,or 10 wt%NaCl)has been achieved as well.Spin-unrestricted density functional theory(DFT)computations implemented in the Dmol3 modulus has been conducted to understand the robust fouling recovery and the variation of surficial wettability after pre-oxidation.These outstanding filtration functions make our NM hold great potential in separating viscous oil/water emulsions under harsh conditions.

关 键 词：Pre-oxidized PAN Anti-harsh conditions Viscous oil-in-water emulsions Emulsions separation Fouling recovery 

分 类 号：TQ061.8[化学工程]