Ultra-robust vertically aligned three-dimensional (3D) Janus hollow fiber membranes for interfacial solar-driven steam generation with salt-resistant and multi-media purification

被引：64

作者：

Wei, Chenjie ^{[1
]}

Zhang, Xihang ^{[1
]}

Ma, Shuyan ^{[1
]}

Zhang, Chengxiong ^{[1
]}

Li, Yang ^{[1
]}

Chen, Dajing ^{[2
]}

Jiang, Hong ^{[3
]}

Xu, Zhikang ^{[1
]}

Huang, Xiaojun ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Polymer Sci & Engn, Key Lab Macromol Synth & Functionalizat MOE, ERC Membrane & Water Treatment MOE, Hangzhou 310027, Peoples R China

[2] Hangzhou Normal Univ, Sch Med, Hangzhou 311121, Peoples R China

[3] Zhejiang Univ, Coll Med, Hangzhou 310003, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 425卷

基金：

中国国家自然科学基金;

关键词：

Janus PP hollow fiber membrane; Capillary-driven siphon; Photothermal properties; Superior salt-resistant; Multi-media purification; HIGHLY EFFICIENT; WATER; EVAPORATION; HEAT;

D O I：

10.1016/j.cej.2021.130118

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The emerging solar-driven steam generation technology is considered as one of the most promising strategies for purifying seawater and wastewater, while it is still challenging to achieve superior evaporation rate, salt-resistant property and multi-media evaporation applications at the same time. Herein, an ultra-robust Janus PP hollow fiber membrane (PP HFM) with capillary-driven siphon and photothermal properties was fabricated. Dopamine (DA), (3-aminopropyl) triethoxy-silane (KH550), TiO2 nanoparticles were immobilized on the inner surface of PP HFMs for turning from a common hydrophobic state to a hydrophilic state. An outer surface with hydrophobicity is constructed by chemical vapor deposition polymerization (CVDP) of polypyrrole (PPy). The fabricated PP-PDA/KH550/TiO2-PPy HFMs showed an asymmetric wettability (inner and outer water contact angle of 0 degrees and 95 degrees), mechanical strength of 1.2 GPa, and light absorption of 95%. Importantly, the low heat loss through decreasing contact area with water enabled vertically aligned HFMs with a superior solar evaporation rate of 3.65 kg/(m(2).h), and a high photothermal conversion efficiency of 229.13% under one-sun irradiation. Furthermore, the Janus PP HFMs showed a superior salt-resistance without salt crystals even in 20 wt% high salinity condition, rejections of ion (<10 ppm salt ions), oil (>99%), and dye (>99%), and excellent stability. The Janus PP HFMs evaporator provide a new paradigm for low heat loss, high evaporation rate, salt-resistant and multi-media purification.

引用

页数：11