Fabrication of recyclable carbonized asphalt‐melamine sponges with high oil‐absorption capability

Yao, Qian; Zhao, Ping; Li, Ru; Li, Chenze; Luo, Yi; Zhou, Guizhong; Yang, Menglong

doi:10.1002/jctb.5137

Cited by 20 publications

(9 citation statements)

References 35 publications

(98 reference statements)

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“…However, as the porosity increases, sponges with high adsorption capacity usually exhibit lower mechanical strength, which immensely impedes the practical application of PDMS sponges [ 21 ]. In order to improve the mechanical strength of PDMS sponges in a low cost, a simple surface modification by adding carbon nanomaterials (such as graphene sheets [ 22 ], carbon nanotubes (CNTs) [ 23 , 24 , 25 , 26 ], and carbon nanofiller [ 27 ]) with a hard template of the PDMS skeleton has been proposed. Despite the enhanced mechanical stability, carbon nanomaterials added by surface deposition are easy to fall off through practical operations such as ultrasound [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes and Polydopamine Modified Poly(dimethylsiloxane) Sponges for Efficient Oil–Water Separation

et al. 2021

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In this paper, effective separation of oil from both immiscible oil–water mixtures and oil-in-water (O/W) emulsions are achieved by using poly(dimethylsiloxane)-based (PDMS-based) composite sponges. A modified hard template method using citric acid monohydrate as the hard template and dissolving it in ethanol is proposed to prepare PDMS sponge composited with carbon nanotubes (CNTs) both in the matrix and the surface. The introduction of CNTs endows the composite sponge with enhanced comprehensive properties including hydrophobicity, absorption capacity, and mechanical strength than the pure PDMS. We demonstrate the successful application of CNT-PDMS composite in efficient removal of oil from immiscible oil–water mixtures within not only a bath absorption, but also continuous separation for both static and turbulent flow conditions. This notable characteristic of the CNT-PDMS sponge enables it as a potential candidate for large-scale industrial oil–water separation. Furthermore, a polydopamine (PDA) modified CNT-PDMS is developed here, which firstly realizes the separation of O/W emulsion without continuous squeezing of the sponge. The combined superhydrophilic and superoleophilic property of PDA/CNT-PDMS is assumed to be critical in the spontaneously demulsification process.

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Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes and Polydopamine Modified Poly(dimethylsiloxane) Sponges for Efficient Oil–Water Separation

et al. 2021

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“…To overcome this challenge, recent studies have focused on the surface modification of sponges, which could alter the hydrophilic surface to make it hydrophobic. A hydrophobic surface would provide the sponge with good water repellency during the separation process of oil absorption 22 – 24 . However, most of the hydrophobic layer is easily destroyed and desorbed due to the weak adhesion between the superhydrophobic coating and the sponge skeleton.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient reusable superhydrophobic sponge prepared by a facile, simple and cost effective biomimetic bonding method for oil absorption

Wang

Chen

et al. 2021

Sci Rep

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Superhydrophobic sponges have considerable potential for oil/water separation. Most of the methods used for superhydrophobic modification of sponges require toxic or harmful solvents, which have the drawbacks of hazardous to environment, expensive, and complex to utilize. Moreover, the hydrophobic layer on the surface of sponge is often easily destroyed. In this paper, a highly efficient superhydrophobic sponge with excellent reusability was developed by using a facile, simple and environmentally friendly dopamine biomimetic bonding method. Different types of sponges, such as melamine, polyethylene or polyurethane sponge wastes, were used as raw materials to prepare superhydrophobic sponges, which possess the advantages of inexpensive and abundant. The effects of different dopamine polymerization time and different hydrophobic agent dosage on the hydrophobicity and oil absorption capacity of melamine sponges were optimized. The study results showed that the water contact angle of the superhydrophobic sponge could reach 153° with excellent organic solvent absorption capacity of 165.9 g/g. Furthermore, the superhydrophobic sponge retained approximately 92.1% of its initial absorption capacity after 35 reutilization cycles. More importantly, the dopamine biomimetic bonding superhydrophobic modification method can be used for different types of sponges. Therefore, a universally applicable, facile, simple and environmentally friendly superhydrophobic modification method for sponges was developed.

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“…The other is 3D porous oil absorption materials (such as copper foam, 14 melamine sponge, 15 porous boron nitride 16 ). Combined their high porosity with inner void space, they can directly absorb oil from the water surface along with eco-friendly and energysaving treating process.…”

Section: Introductionmentioning

confidence: 99%

Graphite powder coated polyurethane sponge hollow tube as a high‐efficiency and cost‐effective oil‐removal materials for continuous oil collection from water surface

Zhang

Xiao

Zhao

et al. 2019

J of Applied Polymer Sci

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In this study, the cost-effective graphite powder (GPd) coated polyurethane (PGPd-PU) sponge hollow tube (PGPd-PUHT) was prepared for high-efficient continuous oil removal, the hydrophobicity-superoleophilicity PGPd-PU sponge was fabricated through a simple dip-coating method, which dipping PU sponge into GPd dispersion and drying, then coating polydimethylsiloxane (PDMS) on sponge skeleton, as-prepared sponge could selectively absorb a variety of oils up to 34 times of its own weight for dimethyl sulfoxide (DMSO). The PGPd-PUHT was prepared via wrapping PGPd-PU sponge on porous tubular support. The obtained PGPd-PUHT could continuously collect various types of oils from water surface with flux as high as 1.52

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Fabrication of recyclable carbonized asphalt‐melamine sponges with high oil‐absorption capability

Cited by 20 publications

References 35 publications

Carbon Nanotubes and Polydopamine Modified Poly(dimethylsiloxane) Sponges for Efficient Oil–Water Separation

Carbon Nanotubes and Polydopamine Modified Poly(dimethylsiloxane) Sponges for Efficient Oil–Water Separation

Highly efficient reusable superhydrophobic sponge prepared by a facile, simple and cost effective biomimetic bonding method for oil absorption

Graphite powder coated polyurethane sponge hollow tube as a high‐efficiency and cost‐effective oil‐removal materials for continuous oil collection from water surface

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