Highly Permeable Sulfonated Polydopamine Integrated MXene Membranes for Efficient Surfactant-Stabilized Oil-in-Water Separation

被引:21
作者
Baig, Nadeem [1 ]
Khan, Niaz Ali [2 ,4 ]
Salhi, Billel [1 ]
Abdulazeez, Ismail [1 ]
Abu-Zahra, Nidal [3 ]
Abdelazem, Sohaib [1 ]
Aljundi, Isam H. [1 ,5 ]
机构
[1] King Fahd Univ Petr & Minerals, Interdisciplinary Res Ctr Membranes & Water Secur, Dhahran 31261, Saudi Arabia
[2] Wuhan Text Univ, Key Lab Text Fiber & Prod, Minist Educ, Wuhan 430200, Peoples R China
[3] Univ Wisconsin Milwaukee, Dept Mat Sci, Milwaukee, WI 53211 USA
[4] Univ Wisconsin Milwaukee, Engn Coll Engn & Appl Sci, Milwaukee, WI 53211 USA
[5] King Fahd Univ Petr & Minerals, Chem Engn Dept, Dhahran 31261, Saudi Arabia
关键词
Ceramic membranes - Contact angle - Surface active agents - Wastewater treatment;
D O I
10.1021/acs.langmuir.3c01651
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
MXene is an incredibly promising two-dimensional material with immense potential to serve as a high-performing separating or barrier layer to develop advanced membranes. Despite the significant progress made in MXene membranes, two major challenges still exist: (i) effectively stacking MXene nanosheets into defect-free membranes and (ii) the high fouling tendency of MXene-based membranes. To address these issues, we employed sulfonated polydopamine (SPD), which simultaneously serves as a binding agent to promote the compact assembling of Ti3C2Tx MXenes (MX) nanosheets and improves the antifouling properties of the resulting sulfonated polydopamine-functionalized MX (SPDMX) membranes. The SPDMX membrane was tested for challenging surfactant-stabilized oil-in-water separation with an impressive efficiency of 98%. Moreover, an ultrahigh permeability of 1620 LMH/bar was also achieved. The sulfonation of PD helps in improving the antifouling characteristics of SPDMX by developing a strong hydration layer and enhancing the oleophobicity of the membrane. The underwater SPDMX membrane appeared superoleophobic with an oil contact angle of 153 degrees, whereas the ceramic membrane exhibited an oil contact angle of 137 degrees. The SPDMX membranes showed an improved flux recovery (31%) compared to the nonsulfonated counterpart. This work highlights the appropriate functionalization of MXene as a promising approach to developing MXene membranes with high permeation flux and better antifouling characteristics for oily wastewater treatment.
引用
收藏
页码:13953 / 13967
页数:15
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