Micro–Nanocomposites in Environmental Management

Chen, Dongyun; Zhu, Haiguang; Yang, Shun; Li, Najun; Xu, Qingfeng; Li, Hua; He, Jinghui; Lu, Jianmei

doi:10.1002/adma.201601486

Cited by 144 publications

(71 citation statements)

References 172 publications

(185 reference statements)

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“…Oils/organic solvents spills cause serious environmental issues in terms of both water contamination and oil waste, which further require a lot of energy consumption and economic burden for water remediation . Recently, materials with superwettability such as superhydrophobicity and superoleophilicity have been introduced to separate immiscible oils/organic solvents and water‐based solutions because of their excellent selective repellence (or affinity) toward water or oils/organic solvents .…”

Section: Introductionmentioning

confidence: 99%

Table Salt as a Template to Prepare Reusable Porous PVDF–MWCNT Foam for Separation of Immiscible Oils/Organic Solvents and Corrosive Aqueous Solutions

Chen

Liu

et al. 2017

Adv Funct Materials

187

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Many advanced materials are designed for separation of immiscible oils/ organic solvents and aqueous solutions, including poly(vinylidene fluoride) (PVDF) based materials with superwettability. However, due to the limited solubility of PVDF, techniques (e.g., phase inversion and electrospinning) often involve the use of toxic organic solvents. Here a facile organic solvent free method is described to prepare a porous PVDF-MWCNT (multiwalled carbon nanotube) foam using table salt as a sacrificial template. The porous PVDF-MWCNT foam is characterized as superhydrophobic-superoleophilic with good elasticity due to its 3D porosity and low surface energy. The foam exhibits high adsorption capacity to a variety of oils/organic solvents and can be easily reused by squeezing, heating, or releasing in other solvents. More over, the foam is highly resistant toward UV exposure, corrosive aqueous solutions such as acidic, alkaline, salty solutions, and turbulent environ ments, and shows effective oils/organic solvents removal in these complex environments. The continuous separation of immiscible oils/organic solvents and corrosive aqueous solutions with vacuum assistance is also presented. The organic solvent free and reusable PVDF-MWCNT foam is a promising candidate for large scale industrial separation of oils/organic solvents and water in corrosive and turbulent conditions.

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Section: Introductionmentioning

confidence: 99%

Table Salt as a Template to Prepare Reusable Porous PVDF–MWCNT Foam for Separation of Immiscible Oils/Organic Solvents and Corrosive Aqueous Solutions

Chen

Liu

et al. 2017

Adv Funct Materials

187

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“…Therefore, an effective and cheap method to separate oil/water mixtures is of grave importance for society and industry. Conventional approaches to remove oil spills include absorption with micro‐/nanocomposites, in situ burning, vacuum suction, bioremediation, skimming, and flotation . However, these traditional methods suffer from their intrinsic limits of low efficiency and high operation cost, and some even suffer from secondary pollution.…”

mentioning

confidence: 99%

“…However, these traditional methods suffer from their intrinsic limits of low efficiency and high operation cost, and some even suffer from secondary pollution. Here, advanced materials and approaches to separate the valuable resources, oils and water, are required . In recent years, the so‐called smart materials arose and drew much attention in the scientific community.…”

mentioning

confidence: 99%

Bioinspired, Mechano‐Regulated Interfaces for Rationally Designed, Dynamically Controlled Collection of Oil Spills from Water

Zhu

Handschuh‐Wang

et al. 2017

Global Challenges

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In order to survive in nature, living systems undergo highly defined morphological evolution to adapt to environmental changes. For example, sponges, [1] aquatic animals of the phylum Porifera, possess bodies full of pores, channels, and chambers, through which a water flow circulates, to bring food and oxygen, and to remove wastes. Therefore, sponges represent a biological paradigm for storage and release of water in a so-called porous system. Possessing similar unique characteristics of natural ones, biomimetic systems have become more and more appealing. [2][3][4][5][6][7] Artificial sponges, which resemble the aforementioned porous and elastic animal sponges, have been This study describes the fabrication of bioinspired mechano-regulated interfaces (MRI) for the separation and collection of oil spills from water. The MRI consists of 3D-interconnected, microporous structures of sponges made of ultrasoft elastomers (Ecoflex). To validate the MRI strategy, ecoflex sponges are first fabricated with a low-cost sugar-leaching method. This study then systematically investigates the absorption capacity (up to 1280% for chloroform) of the sponges to different oils and organic solvents. More importantly, the oil flux through the as-made sponges is controlled by mechanical deformation, which increases up to ≈33-fold by tensile strain applied to the sponge from 0 to 400%. On the basis of MRI, this study further demonstrates the application of ecoflex sponges in oil skimmers for selective collecting oil from water with high efficiency and durable recyclability. The as-developed MRI strategy has opened a new path to allow rational design and dynamical control toward developing high performance devices for oil permeation and selective collection of oil spills from water.

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“…[1,2] However the constituents of wastewater,i ncluding oils, [3][4][5] dyes, [6][7][8] and bacteria, [9,10] are usually complex, making wastewater cleanup difficult. [1,2] However the constituents of wastewater,i ncluding oils, [3][4][5] dyes, [6][7][8] and bacteria, [9,10] are usually complex, making wastewater cleanup difficult.…”

Section: Introductionmentioning

confidence: 99%

Polypropylene Nonwoven Fabric@Poly(ionic liquid)s for Switchable Oil/Water Separation, Dye Absorption, and Antibacterial Applications

et al. 2018

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Pollutants in wastewater include oils, dyes, and bacteria, making wastewater cleanup difficult. Multifunctional wastewater treatment media consisting of poly(ionic liquid)-grafted polypropylene (PP) nonwoven fabrics (PP@PIL) are prepared by a simple and scalable surface-grafting process. The fabricated PP@PIL fabrics exhibit impressive switchable oil/water separation (η>99 %) and dye absorption performance (q=410 mg g ), as well as high antibacterial properties. The oil/water separation can be easily switched by anion exchanging of the PIL segments. Moreover, the multiple functions (oil/water separation, dye absorption, and antibacterial properties) occurred at the same time, and did not interfere with each other. The multifunctional fibrous filter can be easily regenerated by washing with an acid solution, and the absorption capacity is maintained after many recycling tests. These promising features make PIL-grafted PP nonwoven fabric a potential one-step treatment for multicomponent wastewater.

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Micro–Nanocomposites in Environmental Management

Cited by 144 publications

References 172 publications

Table Salt as a Template to Prepare Reusable Porous PVDF–MWCNT Foam for Separation of Immiscible Oils/Organic Solvents and Corrosive Aqueous Solutions

Table Salt as a Template to Prepare Reusable Porous PVDF–MWCNT Foam for Separation of Immiscible Oils/Organic Solvents and Corrosive Aqueous Solutions

Bioinspired, Mechano‐Regulated Interfaces for Rationally Designed, Dynamically Controlled Collection of Oil Spills from Water

Polypropylene Nonwoven Fabric@Poly(ionic liquid)s for Switchable Oil/Water Separation, Dye Absorption, and Antibacterial Applications

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