Polymer/reduced graphene oxide functionalized sponges as superabsorbents for oil removal and recovery

Periasamy, Arun Prakash; Wu, Wenzhong; Ravindranath, Rini; Roy, Prathik; Lin, Guan-Lin; Chang, Huan‐Tsung

doi:10.1016/j.marpolbul.2016.11.005

Cited by 45 publications

(17 citation statements)

References 44 publications

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“…As reported in the literature, the performance of PU foams could be enhanced by subjecting them to various surface modifications, including spray coating [ 4 ], grafting [ 3 , 5 ], plasma-induced graft co-polymerization [ 6 ], and hydrothermal processing [ 7 ]. Nevertheless, it must be pointed out that most of the surface modification approaches are time-consuming and require the use of solvents/hazardous chemicals.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, it must be pointed out that most of the surface modification approaches are time-consuming and require the use of solvents/hazardous chemicals. For instance, the polyethyleneimine (PEI)/reduced graphene oxide (RGO)-coated PU foam synthesized by Periasamy et al [ 7 ] required 24 h for the PEI to be cross-linked with ethylenediaminetetraacetic acid (EDTA) and another 3-h heating at 95 °C to reduce GO. Prior to the surface modification, the PU foam was soaked in a PEI solution followed by adding mixtures of EDTA, GO, and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC).…”

Section: Introductionmentioning

confidence: 99%

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A Green Approach to Modify Surface Properties of Polyurethane Foam for Enhanced Oil Absorption

Roslan

Lau

et al. 2020

Polymers

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The non-selective property of conventional polyurethane (PU) foam tends to lower its oil absorption efficiency. To address this issue, we modified the surface properties of PU foam using a rapid solvent-free surface functionalization approach based on the chemical vapor deposition (CVD) method to establish an extremely thin yet uniform coating layer to improve foam performance. The PU foam was respectively functionalized using different monomers, i.e., perfluorodecyl acrylate (PFDA), 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA), and hexamethyldisiloxane (HMDSO), and the effect of deposition times (1, 5 and 10 min) on the properties of foam was investigated. The results showed that all the modified foams demonstrated a much higher water contact angle (i.e., greater hydrophobicity) and greater absorption capacities compared to the control PU foam. This is due to the presence of specific functional groups, e.g., fluorine (F) and silane (Si) in the modified PU foams. Of all, the PU/PHFBAi foam exhibited the highest absorption capacities, recording 66.68, 58.15, 53.70, and 58.38 g/g for chloroform, acetone, cyclohexane, and edible oil, respectively. These values were 39.19–119.31% higher than that of control foam. The promising performance of the PU/PHFBAi foam is due to the improved surface hydrophobicity attributed to the original perfluoroalkyl moieties of the HFBA monomer. The PU/PHFBAi foam also demonstrated a much more stable absorption performance compared to the control foam when both samples were reused for up to 10 cycles. This clearly indicates the positive impact of the proposed functionalization method in improving PU properties for oil absorption processes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Green Approach to Modify Surface Properties of Polyurethane Foam for Enhanced Oil Absorption

Roslan

Lau

et al. 2020

Polymers

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“…Liu et al [31] reported polydopamine-coated rGO membranes for oil-water emulsions separation. Most recently, graphene-wrapped sponge displayed~94.6% oil-water separation efficiency [35], and polymer/rGO sponges [36], spongy graphene aerogel [37], and rGO foam [38] exhibited excellent superhydrophobicity and selective oil absorption. Wang et al [39] reported a drop-coating method for the fabrication of superhydrophobic/superoleophilic cotton textile using stearic acid modified ZnO particles and polystyrene.…”

Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Dashairya

Rout

Saha

2017

Adv Compos Hybrid Mater

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The present work describes the fabrication of superhydrophobic and superoleophilic reduced graphene oxide-coated cotton (rGO@cotton) by a facile one-step hydrothermal used method for oil-water separation. Results from X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM) analysis show the formation of a composite structure with the presence of an ultrathin coating of rGO on the cotton fibers. The contact angle (CA) between a static water droplet and the rGO@cotton surface in air was measured~162.9°, which suggests the formation of a superhydrophobic surface on the synthesized product. Moreover, the rGO@cotton showed excellent absorption capacity for oils where 1 g of rGO@cotton was able to remove~30-40 g of various oils in the first cycle from oil-water mixtures. The flexible rGO@cotton was reusable and demonstrated oil retention up to~35-50% at the tenth cycle using simple sorption-mechanical squeezing test. Overall, the present work identifies that the rGO@cotton is an efficient absorbent for effective separation of oil from oil-water mixtures.

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“…To the naked eyes, it can be clearly seen that, the surface of MF/rGO sponge has the black in color (see in Figure 1(b)); on the other hand, the pristine MF sponge has the white color (see in Figure 1(a)). This result indicates the blackness color of the MF/rGO has impregnated or covered with rGO sheet particles on the sponge surface [5,10]. In this work, vitamin C not only used as a reducing agent, but also act as a surface modification of MF sponge with the positive charge of H + on the surface of the sponge.…”

Section: Recyclabilitymentioning

confidence: 81%

“…In recent years, a several synthetic polymer sponges, such as, polyurethane (PU), polystyrene (PS), polypropylene (PP), melamine and melamine-formaldehyde (MF), have been widely utilized to cleanup of oil spills due to their low operational costs, lightweight, good flexibility, easy to use and ready availability [2,[4][5]. However, these polymers are suffered from the low oil adsorption capacity, poor selectivity and low chemical stability in an organic solvents media [5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Oxide Precursor Loading on the Surface of Melamine-Formaldehyde/rGO Sponge with Enhanced Ultra-Hydrophobicity for Oils Removal

Jirasuttisarn¹,

Sriwong²

2020

NANO

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This work presented a facile, green and effective method to prepare the ultra-hydrophobic melamine-formaldehyde (MF) sponge loaded with reduced graphene oxide (rGO) by a conventional heating method using the various contents of graphene oxide, GO (1, 3, 5, 10 and 15 mg) precursor, and vitamin C as a reducing agent. These GO precursors were used to increase the roughness of the MF/rGO sponge surfaces. Then GO precursor, rGO, pristine MF sponge and as-prepared MF/rGO sponge samples were confirmed and characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and water contact angle techniques. Moreover, the adsorption capacity, oils removal performance and recyclability of MF/rGO sponges were also investigated. The results showed that the water contact angle values were increased from 131° to 144.1° upon the increasing of GO precursor loading. The highest water contact angle (144.1°) exhibited the ultra-hydrophobic property by the sponge prepared using GO loading as 10 mg (MF/rGO-10 mg). The adsorption capacity (Q e) of the MF/rGO-10 mg sponge was higher than 102 g.g-1 for all the oils removal tested (palm oil, gasoline, diesel and lubricant oil), and had the highest value was about 112 g.g-1 for lubricant oil. Besides, MF/rGO sponge can be well-recycled use up to 10 times for all oils removal. Therefore, this study provides a new alternative method to prepare the MF sponge loaded with rGO (MF/rGO), which can be used and reused for the cleanup of oil spillages from water.

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Polymer/reduced graphene oxide functionalized sponges as superabsorbents for oil removal and recovery

Cited by 45 publications

References 44 publications

A Green Approach to Modify Surface Properties of Polyurethane Foam for Enhanced Oil Absorption

A Green Approach to Modify Surface Properties of Polyurethane Foam for Enhanced Oil Absorption

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Effect of Graphene Oxide Precursor Loading on the Surface of Melamine-Formaldehyde/rGO Sponge with Enhanced Ultra-Hydrophobicity for Oils Removal

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