Nanowire‐Haired Inorganic Membranes with Superhydrophilicity and Underwater Ultralow Adhesive Superoleophobicity for High‐Efficiency Oil/Water Separation

Zhang, Feng; Zhang, Wenbin; Shi, Zhun; Wang, Dong; Jin, Jian; Jiang, Lei

doi:10.1002/adma.201301480

Cited by 793 publications

(541 citation statements)

References 57 publications

Supporting

Mentioning

532

Contrasting

Unclassified

Order By: Relevance

“…As an alternative to this strategy, we recently designed a Cu(OH) 2 nanowire-haired copper mesh membrane by in-situ oxidizing copper mesh in alkaline conditions ( Figure 6). 124 The membrane with superhydrophilicity and underwater ultralow adhesive superoleophobicity could effectively separate both immiscible oil/water mixtures and oil-inwater emulsions, solely driven by gravity, with an extremely high separation efficiency. The residual oil in the filtrate after only one separation was lower than 30 p.p.m., which meets the stringent standards for wastewater discharge.…”

Section: Nanomaterial-based Advanced Membranesmentioning

confidence: 99%

Recent progress in developing advanced membranes for emulsified oil/water separation

2014

Self Cite

View full text Add to dashboard Cite

The separation of oily wastewater, especially emulsified oil/water mixtures, is a worldwide challenge because of the large amount of oily wastewater produced in many industrial processes and daily life. For the treatment of oily wastewater, membrane technology is considered the most efficient method because of its high separation efficiency and relatively simple operational process. In this short review, the recent development of advanced filtration membranes for emulsified oil/water mixture separation is presented. We provide an overview on both traditional filtration membranes, including polymer-dominated and ceramic-based filtration membranes, and recently developed nanomaterial-based functional filtration membranes, especially one-dimensional nanomaterials, for effectively treating emulsified oil/water mixtures. The liquid flux and antifouling property, which are the most important factors for membrane performance evaluation, are described for different types of membranes. Conclusions and perspectives concerning the future development of filtration membranes are also provided.

show abstract

Section: Nanomaterial-based Advanced Membranesmentioning

confidence: 99%

Recent progress in developing advanced membranes for emulsified oil/water separation

2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Cellulose networks are porous, micro-textured materials [7,16], with a strong affinity for water due to the presence of the abundant hydroxyl groups of cellulose. Numerous efforts have been made in order to turn these materials into water-resistant multifunctional systems, thus expanding their applicability in diverse technological fields [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Functionalized Cellulose Networks for Efficient Oil Removal from Oil–Water Emulsions

2016

View full text Add to dashboard Cite

Abstract:The separation of oil from water in emulsions is a great environmental challenge, since oily wastewater is industrially produced. Here, we demonstrate a highly efficient method to separate oil from water in non-stabilized emulsions, using functionalized cellulose fiber networks. This is achieved by the modification of the wetting properties of the fibers, transforming them from oil-and water-absorbing to water-absorbing and oil-proof. In particular, two diverse layers of polymeric coatings, paraffin wax and poly(dimethylsiloxane)-b-poly(ethylene oxide) (PDMS-b-PEO) diblock copolymer, are applied on the surface of each individual fiber by a two-step dip adsorption process. The resulting cellulose networks exhibit superhydrophilicity and underwater superoleophobicity and they are mechanically reinforced. Therefore, the described treatment makes cellulose fiber networks excellent candidates for the filtration and subsequent removal of oil from oil-in-water non-stabilized emulsions with oil separation efficiency up to 99%. The good selectivity, reproducibility, and cost effectiveness of the preparation process leads to the production of low cost filters that can be used in oil-water separation applications.

show abstract

“…[16][17][18][19][20] In addition, researchers have gained inspiration from oil-contaminantfree fish skin to fabricate oil-repellent hydrogel membranes that could separate oil from water. 21,22 Although significant progress has been achieved for membrane-based oil/water separation in the last few years, development of separation membranes for organic liquids is still highly limited because organic liquids usually possess a relatively lower surface tension than water. The difficulty in separation of organic liquid mixtures has increased because it is more difficult to build a superoleophobic [23][24][25][26][27][28][29] material than a superhydrophobic material.…”

Section: Introductionmentioning

confidence: 99%

Separation of organic liquid mixture by flexible nanofibrous membranes with precisely tunable wettability

Hou

Wang

et al. 2016

NPG Asia Mater

Self Cite

View full text Add to dashboard Cite

Separation of liquid mixtures, especially organic liquid mixtures, is widely used in industrial processes but still faces challenges with respect to separation in a high-efficiency, low-energy mode. In this work, we report a flexible wettability-tunable nanofibrous membrane composed of a high-performance fluoro-polymer as the matrix and fluorosilane as a surface energy regulator that can be successfully applied in immiscible organic liquid mixture separation. The separation is achieved by tuning the surface energy of a membrane to a value between the surface tensions of two organic liquids. Moreover, for use in different mixed liquid systems, we programmatically designed nanofibrous membranes with the proper surface energy that could intercept the relatively high surface tension liquid and allow the low surface tension liquid to pass through. These membranes are expected to become a competitive candidate for complex organic chemical product separation, resource recycling, and environmental protection. INTRODUCTIONLiquid mixtures of solvents or reactants are ubiquitously applied in processes in the petrochemical, textile printing, food and medical industries. These complex liquid mixtures often must be separated after reaction for the purpose of product purification, resource recycling or harmless discharge. 1 Traditional liquid separation methods such as distillation and separation have exposed many drawbacks, including high-energy consumption, low flux and low efficiency, that dramatically increase the separation time and cost. 2 Therefore, challenges remain for the development of separation processes of organic liquid mixtures that are efficient, allow high throughput and conserve energy. Among various separation approaches, the membrane separation technique has been extensively proven as a high throughput and energy-efficient choice. [3][4][5] Over the past decade, various membranes with special wettability properties have been successfully prepared and have exhibited excellent performance in oil/water separation. The mechanisms of membrane separation are based on exact opposite wettabilities toward oil and water, including superhydrophobic/superoleophilic membranes 3,5-8 or superhydrophilic/superoleophobic membranes. 9-15 For example, superhydrophobic/oleophilic membranes have been prepared from various materials, including metals, polymers or even clothes and filter papers, that could intercept water and allow oil to pass through. [16][17][18][19][20] In addition, researchers have gained inspiration from oil-contaminantfree fish skin to fabricate oil-repellent hydrogel membranes that could separate oil from water. 21,22 Although significant progress has been achieved for membrane-based oil/water separation in the last few years, development of separation membranes for organic liquids is still highly limited because organic liquids usually possess a relatively lower surface tension than water. The difficulty in separation of organic liquid mixtures has increased because it is more difficult to build a super...

show abstract

Nanowire‐Haired Inorganic Membranes with Superhydrophilicity and Underwater Ultralow Adhesive Superoleophobicity for High‐Efficiency Oil/Water Separation

Cited by 793 publications

References 57 publications

Recent progress in developing advanced membranes for emulsified oil/water separation

Recent progress in developing advanced membranes for emulsified oil/water separation

Functionalized Cellulose Networks for Efficient Oil Removal from Oil–Water Emulsions

Separation of organic liquid mixture by flexible nanofibrous membranes with precisely tunable wettability

Contact Info

Product

Resources

About