scholarly journals Efficient Oil/Water Separation Membrane Derived from Super-Flexible and Superhydrophilic Core–Shell Organic/Inorganic Nanofibrous Architectures

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 974 ◽  
Author(s):  
Zhi Liu ◽  
Detao Qin ◽  
Jianghui Zhao ◽  
Quan Feng ◽  
Zhengtao Li ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Scale Up ◽  
Core Shell ◽  
Water Separation ◽  
Membrane Performance ◽  
Novel Approach ◽  
Separation Membrane ◽  
Oil Water Separation ◽  
Oil Water ◽  
Nanofibrous Membranes

To address the worldwide oil and water separation issue, a novel approach was inspired by natural phenomena to synthesize superhydrophilic and underwater superoleophobic organic/inorganic nanofibrous membranes via a scale up fabrication approach. The synthesized membranes possess a delicate organic core of PVDF-HFP and an inorganic shell of a CuO nanosheet structure, which endows super-flexible properties owing to the merits of PVDF-HFP backbones, and superhydrophilic functions contributed by the extremely rough surface of a CuO nanosheet anchored on flexible PVDF-HFP. Such an organic core and inorganic shell architecture not only functionalizes membrane performance in terms of antifouling, high flux, and low energy consumption, but also extends the lifespan by enhancing its mechanical strength and alkaline resistance to broaden its applicability. The resultant membrane exhibits good oil/water separation efficiency higher than 99.7%, as well as excellent anti-fouling properties for various oil/water mixtures. Considering the intrinsic structural innovation and its integrated advantages, this core–shell nanofibrous membrane is believed to be promising for oil/water separation, and this facile approach is also easy for scaled up manufacturing of functional organic/inorganic nanofibrous membranes with insightful benefits for industrial wastewater treatment, sensors, energy production, and many other related areas.

scholarly journals Dodecyl Mercaptan Functionalized Copper Mesh for Water Repellence and Oil-water Separation

2021 ◽  
Vol 18 (4) ◽  
pp. 887-899
Author(s):  
Yanling Tian ◽  
Jiekai Feng ◽  
Zexin Cai ◽  
Jiaqi Chao ◽  
Dawei Zhang ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Synthesis Process ◽  
Water Separation ◽  
Oil Water Separation ◽  
One Step ◽  
Oil Water ◽  
Water Repellence ◽  
Copper Mesh ◽  
Dodecyl Mercaptan

AbstractReckless discharge of industrial wastewater and domestic sewage as well as frequent leakage of crude oil have caused serious environmental problems and posed severe threat to human survival. Various nature inspired superhy-drophobic surfaces have been successfully applied in oily water remediation. However, further improvements are still urgently needed for practical application in terms of facile synthesis process and long-term durability towards harsh environment. Herein, we propose a simple one-step dodecyl mercaptan functionalization method to fabricate Super-hydrophobic-Superoleophilic Copper Mesh (SSCM). The prepared SSCM possesses excellent water repellence and oil affinity, enabling it to successfully separate various oil-water mixtures with high separation efficiency (e.g., > 99% for hexadecane-water mixture). The SSCM retains high separating ability when hot water and strong corrosive aqueous solutions are used to simulate oil-water mixtures, indicating remarkable chemical durability of the dodecyl mercaptan functionalized copper mesh. Additionally, the efficiency can be well maintained during 50 cycles of separation, and the water repellence is even stable after storage in air for 120 days, demonstrating the reusability and long-term stability of the SSCM. Furthermore, the functionalized mesh also shows good mechanical robustness towards abrasion by sandpaper, and oil-water separation efficiency of > 96% can be obtained after 10 cycles of abrasion. The reported one-step dodecyl mercaptan functionalization could be a simple method for increasing the water repellence of copper mesh, and thereby be a great candidate for treating large-scale oily wastewater in harsh environments.

Ultra-high oil-water separation membrane based on two-dimensional MXene(Ti3C2Tx) by co-incorporation of halloysite nanotubes and polydopamine

2021 ◽  
Vol 211 ◽  
pp. 106177
Author(s):  
Guangyong Zeng ◽  
Ke Wei ◽  
Haiyan Zhang ◽  
Jun Zhang ◽  
Qingquan Lin ◽  
...  
Keyword(s):  
Halloysite Nanotubes ◽  
Two Dimensional ◽  
Water Separation ◽  
Separation Membrane ◽  
Oil Water Separation ◽  
Oil Water

Fabrication of highly durable and robust superhydrophobic-superoleophilic nanofibrous membranes based on a fluorine-free system for efficient oil/water separation

2019 ◽  
Vol 570-571 ◽  
pp. 303-313 ◽  
Author(s):  
Wenjing Ma ◽  
Mengjie Zhang ◽  
Zhongche Liu ◽  
Mengmeng Kang ◽  
Chaobo Huang ◽  
...  
Keyword(s):  
Water Separation ◽  
Free System ◽  
Oil Water Separation ◽  
Oil Water ◽  
Nanofibrous Membranes

Fabrication of cellulose nanofiber-deposited cellulose sponge as an oil-water separation membrane

2019 ◽  
Vol 224 ◽  
pp. 322-331 ◽  
Author(s):  
Abdul Halim ◽  
Yinchao Xu ◽  
Kuan-Hsuan Lin ◽  
Motoyoshi Kobayashi ◽  
Mikio Kajiyama ◽  
...  
Keyword(s):  
Cellulose Nanofiber ◽  
Water Separation ◽  
Cellulose Sponge ◽  
Separation Membrane ◽  
Oil Water Separation ◽  
Oil Water

scholarly journals Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Peng Hong ◽  
Zhu Liu ◽  
Yang Gao ◽  
Yubin Chen ◽  
Mingxun Zhuang ◽  
...  
Keyword(s):  
Large Scale ◽  
Separation Efficiency ◽  
Low Cost ◽  
Water Repellency ◽  
Dip Coating ◽  
Absorption Capacity ◽  
Photochromic Properties ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

Superhydrophobic sponge as potential absorbing material for oil/water separation is attracting great attention recently. However, there are still some challenges to feasibly fabricate superhydrophobic sponge with large scale and low cost. Herein, a novel photochromic superhydrophobic melamine sponge (PDMS-SP sponge) is fabricated by facilely dip-coating and thermocuring of hydroxyl-terminated polydimethylsiloxanes mixed with photochromic spiropyran. FT-IR, EDS, and XPS results confirm the successful coating of PDMS-SP upon melamine sponge. The resultant sponge not only possesses excellent water repellency with a contact angle of 154.5° and oil-water separation efficiency with an oil absorption capacity of 48–116 folds of itself weight, but also shows photochromic phenomenon between colorless and purple when it is successively exposed to UV irradiation and visible light.

Superwetting Oil/Water Separation Membrane Constructed from In Situ Assembled Metal–Phenolic Networks and Metal–Organic Frameworks

2020 ◽  
Vol 12 (8) ◽  
pp. 10000-10008 ◽  
Author(s):  
Ruoxi Wang ◽  
Xueting Zhao ◽  
Ning Jia ◽  
Lijuan Cheng ◽  
Lifen Liu ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Water Separation ◽  
Separation Membrane ◽  
Oil Water Separation ◽  
Metal Organic ◽  
Oil Water

Nature-inspired chemistry toward hierarchical superhydrophobic, antibacterial and biocompatible nanofibrous membranes for effective UV-shielding, self-cleaning and oil-water separation

2020 ◽  
Vol 384 ◽  
pp. 121476 ◽  
Author(s):  
Wenjing Ma ◽  
Yichun Ding ◽  
Mengjie Zhang ◽  
Shuting Gao ◽  
Yuansheng Li ◽  
...  
Keyword(s):  
Water Separation ◽  
Uv Shielding ◽  
Oil Water Separation ◽  
Oil Water ◽  
Nanofibrous Membranes ◽  
Self Cleaning

scholarly journals PP/TiO2 Melt-Blown Membranes for Oil/Water Separation and Photocatalysis: Manufacturing Techniques and Property Evaluations

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 775 ◽  
Author(s):  
Fei Sun ◽  
Ting-Ting Li ◽  
Haitao Ren ◽  
Qian Jiang ◽  
Hao-Kai Peng ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Decomposition Temperature ◽  
Particle Dispersion ◽  
Tio2 Content ◽  
Scanning Calorimetry ◽  
Water Separation ◽  
Photocatalytic Effect ◽  
Oil Water Separation ◽  
Oil Water ◽  
Manufacturing Techniques

This study aims to produce polypropylene (PP)/titanium dioxide (TiO2) melt-blown membranes for oil/water separation and photocatalysis. PP and different contents of TiO2 are melt-blended to prepare master batches using a single screw extruder. The master batches are then fabricated into PP/TiO2 melt-blown membranes. The thermal properties of the master batches are analyzed using differential scanning calorimetry and thermogravimetric analysis, and their particle dispersion and melt-blown membrane morphology are evaluated by scanning electron microscopy. TiO2 loaded on melt-blown membranes is confirmed by X-ray diffraction (XRD). The oil/water separation ability of the melt-blown membranes is evaluated to examine the influence of TiO2 content. Results show that the thermal stability and photocatalytic effect of the membranes increase with TiO2 content. TiO2 shows a good dispersion in the PP membranes. After 3 wt.% TiO2 addition, crystallinity increases by 6.4%, thermal decomposition temperature increases by 25 °C compared with pure PP membranes. The resultant PP/TiO2 melt-blown membrane has a good morphology, and better hydrophobicity even in acetone solution or 6 h ultraviolet irradiation, and a high oil flux of about 15,000 L·m−2·h−1. Moreover, the membranes have stabilized oil/water separation efficiency after being repeatedly used. The proposed melt-blown membranes are suitable for mass production for separating oil from water in massively industrial dyeing wastewater.

Ampholytic Chitosan/Alginate Composite Nanofibrous Membranes with Super Anti-Crude Oil-Fouling Behavior and Multifunctional Oil/Water Separation Properties

2019 ◽  
Vol 7 (18) ◽  
pp. 15463-15470 ◽  
Author(s):  
Weikang Zhou ◽  
Yan Fang ◽  
Peiyuan Li ◽  
Liyu Yan ◽  
Xianmou Fan ◽  
...  
Keyword(s):  
Crude Oil ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Nanofibrous Membranes ◽  
Oil Fouling

Amphiphilic hyperbranched polyethyleneimine for highly efficient oil–water separation

2020 ◽  
Vol 8 (5) ◽  
pp. 2412-2423 ◽  
Author(s):  
Shu Yan ◽  
Guijin He ◽  
Dengfeng Ye ◽  
Yongsheng Guo ◽  
Wenjun Fang
Keyword(s):  
Phase Separation ◽  
Soft Matter ◽  
Polymer Layer ◽  
Core Shell ◽  
Water Separation ◽  
Highly Efficient ◽  
Oil Water Separation ◽  
Oil Water

Core–shell structural amphiphilic soft matter, HPEI-g-Cn, can achieve phase separation thoroughly, in which an interfacial active-polymer layer is formed after demulsification.

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