A Superhydrophobic Sponge with Excellent Absorbency and Flame Retardancy

In the past few years, three‐dimensional self‐supporting porous magnetic assemblies (3D‐SPMAs) have emerged as a new research area in materials science because of their combined features of three‐dimensional self‐supporting porous assemblies (3D‐SPAs) and magnetic materials. Due to these attributes, 3D‐SPMAs gain numerous tempting properties such as magnetism‐induced actuating, magnetic shape memory effects, and alternative magnetic field (AMF) induced heat generation, showcasing huge potential in diverse applications stretching over water remediation, actuators, biomedical therapy, etc. Especially, 3D‐SPMAs displayed eminent potential in water remediation for their large processing capacity, remote controllability, and magnetic‐field‐mediated wettability. With the rising interest in 3D‐SPAs, the increasing understanding of magnetic materials, and the flourish of materials preparation technique, an upsurge has appeared in 3D‐SPMAs and thus managing them a class of emerging and promising functional materials. However, currently there are rarely review papers concerning 3D‐SPMAs. In this light, this review aims to express a comprehensive overview of this young field and fuel further innovations for preparation methods and practical applications of 3D‐SPMAs. The focus is placed on the synthetic strategies and applications especially in water remediation. The potential opportunities and challenges are also discussed.

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Section: Magnetic Properties Of Materialsmentioning

confidence: 99%

3D Self‐Supporting Porous Magnetic Assemblies for Water Remediation and Beyond

Zhao

Zheng

et al. 2016

Advanced Energy Materials

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“…There are several methods for fabricating oil/water separation materials. [1][2][3][5][6][7][8][9] These methods include the fabrication of surfaces with superhydrophobicity and superoleophilicity for the separation of oil from water. However, these methods cannot remove/purify soluble pollutants in water.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the increasing requirements for environmental and water remediation, the selective separation of oil spills (or organic solvents) from water using polymer membranes/febrics, [ 1,2 ] metal meshes, [ 3,4 ] and sponges [ 5,6 ] has been the subject of extensive research in recent years. There are several methods for fabricating oil/water separation materials.…”

Section: Introductionmentioning

confidence: 99%

Inorganic Micelles (Hydrophilic Core@Amphiprotic Shell) for Multiple Applications

Islam

Choi

Kim

et al. 2015

Adv Funct Materials

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Very little attention has been focused on the purifi cation of water-soluble pollutants after oil/water separation. [ 4 ] Thus, there is considerable interest in developing novel and facile methods for the simultaneous separation of oil from water and purifi cation of water-soluble pollutants.The practical application of organic micelle catalysts that utilize hydrophilic/ hydrophobic interfaces has been limited by several disadvantages. For example, the stability of organic micelles depends on many parameters, such as the solvent polarity, critical micelle concentration, and reaction conditions, such as pH, water/oil ratio, and temperature. [ 10,11 ] Due to the narrow range of stability of organic micelles, the synthesis of inorganic micelles that have hydrophilic/hydrophobic interfaces, large surface areas, high porosities, tunable surfaces, and high recyclability has recently attracted some attention. [ 12,13 ] For example, Lin and co-workers reported a simple route to hierarchically assembling micelles and inorganic nanoparticles. [ 14 ] Yang and co-workers prepared functionalized mesoporous silica spheres consisting of a hydrophobic core and a hydrophilic micellar shell. [ 15 ] As a fi rst example, Alivisatos and co-workers recently reported resin templates based on the synthesis of inorganic micelles with a hydrophilic cavity and a hydrophobic surface and its application as a catalyst in the bromination of alcohol. [ 16 ] There is still considerable interest in developing novel methods for the exploration of interior/ exterior-functionalized, superhydrophobic, and nanostructured inorganic micelles. To fulfi ll the requirements of oil/water separation and inorganic micellar catalysis mentioned above, the development of hierarchical nanomaterials that have a hydrophilic interior and superhydrophobic/hydrophilic (amphiprotic) exterior is highly desirable, offering signifi cant potential for multiple applications. To the best of our knowledge, this report is the fi rst example of the synthesis of nanomaterials that have a hydrophilic core and amphiprotic shell for multiple applications, such as amphiprotic catalytic reactions, oil/water separation and pollutant purifi cation, and enzyme immobilization with signifi cant stability and effi cient recyclability.Herein, we present the preparation and multiple applications of superhydrophobic hollow SiO 2 micelles (SHSMs) with hydrophilic cores and amphiprotic (superhydrophobic/hydrophilic) shell structures that act as "all-in-one" smart nanomaterials. Our SHSMs are better than hydrophilic@hydrophobic micelles prepared using previously reported methods for several reasons: (i) the polyallylamine hydrochloride (PAH) chains were extended and survived from the core to the shell even Inorganic Micelles (Hydrophilic Core@Amphiprotic Shell) for Multiple Applications Md. Shahinul Islam , Won San Choi , * Sun Ha Kim , Oc Hee Han , and Ha-Jin Lee * A facile approach for synthesizing superhydrophobic hollow silica micelles (SHSMs) with hydrophilic cores and amphiprotic (supe...

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“…Oil, as well as organic pollutants can be adsorbed by various sorbents, which are used for oil spill recovery, and after sorption, they are usually removed by mechanical extraction, followed by burning and other specific methods of their processing. They also require high processing time for separation of large quantities of oil and water, while their processing is allocated with a huge amount of evaporated petroleum fractions into the atmosphere, enhancing the greenhouse effect [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Spongy Structures Coated with Carbon Nanomaterials for Efficient Oil/Water Separation

Sultanov

Bakbolat

Mansurov

et al. 2017

Eurasian Chem. Tech. J.

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Rapid progress of processing and transportation of oil and petroleum products may cause disaster for environment like oil spill. Oil booms, combustion, and oil skimmer vessels are usually used to clean up the oil spill, but often with poor efficiency and even with undesirable environmental side effects. With obtaining of carbon nanomaterials (CNMs) (graphene, carbon nanotubes) and developing inexpensive technologies for their synthesis it has become perspective to use them for creation of 3D structures which may serve as a hydrophobic sorbents for oil and petroleum products. In this study, sponges coated with carbon nanomaterials were obtained using "dip-coating" method. Walls of commercially available polyurethane (PU) and melamine sponges were coated with reduced graphene oxide (rGO) and multiwalled carbon nanotubes (MWCNTs). The resulting sponges are characterized by excellent mechanical properties, they are superhydprophobic, and they fully repel water and at the same time selectively absorb oil and organic liquids of different densities. We believe that superhydrophobic and superoleophilic sponges, the walls of which are coated with CNMs, are perspective candidates for reusable sorbents for collection of oil and petroleum products from the surface of water and moreover due to its excellent mechanical properties they can serve as a hydrophobic filtering materials for separation of oil from the surface of water.

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A Superhydrophobic Sponge with Excellent Absorbency and Flame Retardancy

Cited by 445 publications

References 38 publications

3D Self‐Supporting Porous Magnetic Assemblies for Water Remediation and Beyond

3D Self‐Supporting Porous Magnetic Assemblies for Water Remediation and Beyond

Inorganic Micelles (Hydrophilic Core@Amphiprotic Shell) for Multiple Applications

Spongy Structures Coated with Carbon Nanomaterials for Efficient Oil/Water Separation

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