Facile Fabrication of Recyclable, Superhydrophobic, and Oleophilic Sorbent from Waste Cigarette Filters for the Sequestration of Oil Pollutants from an Aqueous Environment

The oil industry is plagued with regular incidences of spills into the environment, causing environmental damage to flora and fauna, especially in marine environments where spills easily travel long distances from their sources. This study was carried out to investigate a simple two-step process for the conversion of waste cigarette filters into a superhydrophobic and oleophilic sorbent for application in oil/water separation and spill clean-up. Ultrasonically cleaned filters were surface modified by chemical vapour deposition using methyltrichlorosilane. The results show that the functionalised waste filters achieved superhydrophobic properties with a water contact angle of 154 ± 3.5°, adsorbing 16 to 26 times their weights in various oils, which is a better oil sorption performance than those of commercially available non-woven polypropylene adsorbents. Also, the sorption capacity did not significantly deteriorate after 20 cycles of reuse, with up to 75% sorption capacity retained. The surface modified filters demonstrated excellent water repellency, oil sorption, and recyclability showing their potential application for full scale oil spill clean-up.

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Facile Fabrication of Magnetic, Durable and Superhydrophobic Cotton for Efficient Oil/Water Separation

Polymers ◽

10.3390/polym11030442 ◽

2019 ◽

Vol 11 (3) ◽

pp. 442 ◽

Cited By ~ 4

Author(s):

Mingguang Yu ◽

Qing Wang ◽

Wenxin Yang ◽

Yonghang Xu ◽

Min Zhang ◽

...

Keyword(s):

Separation Efficiency ◽

Water Repellency ◽

Cotton Fabrics ◽

Ammonia Solution ◽

Hot Water ◽

Water Contact ◽

Water Separation ◽

Efficient Strategy ◽

Oil Water Separation ◽

Oil Water

In this paper, we present a facile and efficient strategy for the fabrication of magnetic, durable, and superhydrophobic cotton for oil/water separation. The superhydrophobic cotton functionalized with Fe3O4 magnetic nanoparticles was prepared via the in situ coprecipitation of Fe2+/Fe3+ ions under ammonia solution on cotton fabrics using polyvinylpyrrolidone (PVP) as a coupling agent and hydrophobic treatment with tridecafluorooctyl triethoxysilane (FAS) in sequence. The as-prepared cotton demonstrated excellent superhydrophobicity with a water contact angle of 155.6° ± 1.2° and good magnetic responsiveness. Under the control of the external magnetic field, the cotton fabrics could be easily controlled to absorb the oil from water as oil absorbents, showing high oil/water separation efficiency, even in hot water. Moreover, the cotton demonstrated remarkable mechanical durable properties, being strongly friction-resistant against sandpaper and finger wipe, while maintaining its water repellency. This study developed a novel and efficient strategy for the construction of magnetic, durable, and superhydrophobic biomass-based adsorbent for oil/water separation, which can be easily scaled up for practical oil absorption.

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Facile fabrication of superhydrophobic filter paper with improved durability and water repellency

Nordic Pulp & Paper Research Journal ◽

10.1515/npprj-2021-0010 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Lizheng Sha ◽

Chao Ma ◽

Huifang Zhao ◽

Supeng Qiu ◽

Zhongyu Yan ◽

...

Keyword(s):

Filter Paper ◽

Separation Efficiency ◽

Cellulose Nanofibrils ◽

Water Repellency ◽

Step Method ◽

Water Contact ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water ◽

Self Cleaning

Abstract Superhydrophobic surfaces have high potential in self-cleaning and oil-water separation applications. We developed a three-step method for the preparation of superhydrophobic filter paper. It involved citric acid (CA) pretreatment to activate cellulose fibers, coating with cellulose nanofibrils/functionalized silica (CNFs/m-SiO2) slurry to increase surface roughness, and grafting of hexadecyltrimethoxysilane (HDTMS) to enhance water resistance. The water contact angle (WCA) and siding angle (SA) of the prepared filter paper reached 151.5° and 7.5°, respectively. The results showed that, compared to the coated filter paper without the added CNFs, the coated paper with CNFs had higher retention of m-SiO2, thus roughness required for superhydrophobic surface was achieved. Further test under frequent abrasion and acid or alkali conditions showed that CA pretreatment improved the durability of superhydrophobic filter paper due to chemical crosslinking between the modified substrate and m-SiO2. Besides, the prepared superhydrophobic filter paper had outstanding self-cleaning property and high oil-water separation efficiency for various oil-water mixtures. Therefore, it is expected to be used for the treatment of oily wastewater.

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Complex Aerogels Generated from Nano-Polysaccharides and Its Derivatives for Oil–Water Separation

Polymers ◽

10.3390/polym11101593 ◽

2019 ◽

Vol 11 (10) ◽

pp. 1593 ◽

Cited By ~ 4

Author(s):

Hajo Yagoub ◽

Liping Zhu ◽

Mahmoud H. M. A. Shibraen ◽

Ali A. Altam ◽

Dafaalla M. D. Babiker ◽

...

Keyword(s):

Guar Gum ◽

Corn Oil ◽

Cellulose Nanofibers ◽

Aqueous Media ◽

Three Dimensional ◽

Absorption Capacity ◽

Water Contact ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water

The complex aerogel generated from nano-polysaccharides, chitin nanocrystals (ChiNC) and TEMPO-oxidized cellulose nanofibers (TCNF), and its derivative cationic guar gum (CGG) is successfully prepared via a facile freeze-drying method with glutaraldehyde (GA) as cross-linkers. The complexation of ChiNC, TCNF, and CGG is shown to be helpful in creating a porous structure in the three-dimensional aerogel, which creates within the aerogel with large pore volume and excellent compressive properties. The ChiNC/TCNF/CGG aerogel is then modified with methyltrichlorosilane (MTCS) to obtain superhydrophobicity/superoleophilicity and used for oil–water separation. The successful modification is demonstrated through FTIR, XPS, and surface wettability studies. A water contact angle of 155° on the aerogel surface and 150° on the surface of the inside part of aerogel are obtained for the MTCS-modified ChiNC/TCNF/CGG aerogel, resulting in its effective absorption of corn oil and organic solvents (toluene, n-hexane, and trichloromethane) from both beneath and at the surface of water with excellent absorption capacity (i.e., 21.9 g/g for trichloromethane). More importantly, the modified aerogel can be used to continuously separate oil from water with the assistance of a vacuum setup and maintains a high absorption capacity after being used for 10 cycles. The as-prepared superhydrophobic/superoleophilic ChiNC/TCNF/CGG aerogel can be used as a promising absorbent material for the removal of oil from aqueous media.

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Flexible polyurethane foams surface-modified with FeOOH for improved oil-water separation and flame retardancy

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2021.125408 ◽

2021 ◽

pp. 125408

Author(s):

Mengqing Zhou ◽

Sijia Zhao ◽

Keqing Zhou ◽

Fuding Mei ◽

Xiaodong Qian ◽

...

Keyword(s):

Flame Retardancy ◽

Polyurethane Foams ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water ◽

Surface Modified ◽

Flexible Polyurethane

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Design and fabrication of polydopamine based superhydrophobic fabrics for efficient oil-water separation

Soft Matter ◽

10.1039/d1sm00647a ◽

2021 ◽

Author(s):

Jixi Zhang ◽

Ligui Zhang ◽

Xiao Gong

Keyword(s):

Contact Angle ◽

Water Contact Angle ◽

Sol Gel ◽

High Water ◽

Water Contact ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water ◽

Fabric Surface

In this work, we prepare a PDMS-SiO2-PDA@fabric with high water contact angle (WCA=155o). Combining dopamine self-polymerization and sol-gel method, SiO2 is in situ grown on a PDA-modified fabric surface to...

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Surface-Modified Nanoporous Membrane for Oil–Water Separation

Water Air & Soil Pollution ◽

10.1007/s11270-021-05493-6 ◽

2022 ◽

Vol 233 (1) ◽

Author(s):

Arthi Karunanithi ◽

Jyotiraman De ◽

Sumit Saxena ◽

Shobha Shukla

Keyword(s):

Water Separation ◽

Nanoporous Membrane ◽

Oil Water Separation ◽

Oil Water ◽

Surface Modified

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Superhydrophilic Coating with Antibacterial and Oil-Repellent Properties via NaIO4-Triggered Polydopamine/Sulfobetaine Methacrylate Polymerization

Polymers ◽

10.3390/polym12092008 ◽

2020 ◽

Vol 12 (9) ◽

pp. 2008

Author(s):

Hsiu-Wen Chien ◽

Hong-Yu Lin ◽

Chau-Yi Tsai ◽

Tai-Yu Chen ◽

Wei-Nian Chen

Keyword(s):

Surface Modification ◽

Photoelectron Spectroscopy ◽

Deposition Process ◽

Water Contact ◽

Water Separation ◽

Force Microscopy ◽

Atomic Force ◽

Oil Water Separation ◽

One Step ◽

Oil Repellent

Superhydrophilic coatings have been widely used for the surface modification of membranes or biomedical devices owing to their excellent antifouling properties. However, simplifying the modification processes of such materials remains challenging. In this study, we developed a simple and rapid one-step co-deposition process using an oxidant trigger to fabricate superhydrophilic surfaces based on dopamine chemistry with sulfobetaine methacrylate (SBMA). We studied the effect of different oxidants and SBMA concentrations on surface modification in detail using UV–VIS spectrophotometry, dynamic light scattering, atomic force microscopy, X-ray photoelectron spectroscopy, and surface plasmon resonance. We found that NaIO4 could trigger the rate of polymerization and the optimum ratio of dopamine to SBMA is 1:25 by weight. This makes the surface superhydrophilic (water contact angle < 10°) and antifouling. The superhydrophilic coating, when introduced to polyester membranes, showed great potential for oil/water separation. Our study provides a complete description of the simple and fast preparation of superhydrophilic coatings for surface modification based on mussel-inspired chemistry.

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Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

Advances in Polymer Technology ◽

10.1155/2019/9536320 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Peng Hong ◽

Zhu Liu ◽

Yang Gao ◽

Yubin Chen ◽

Mingxun Zhuang ◽

...

Keyword(s):

Large Scale ◽

Separation Efficiency ◽

Low Cost ◽

Water Repellency ◽

Dip Coating ◽

Absorption Capacity ◽

Photochromic Properties ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water

Superhydrophobic sponge as potential absorbing material for oil/water separation is attracting great attention recently. However, there are still some challenges to feasibly fabricate superhydrophobic sponge with large scale and low cost. Herein, a novel photochromic superhydrophobic melamine sponge (PDMS-SP sponge) is fabricated by facilely dip-coating and thermocuring of hydroxyl-terminated polydimethylsiloxanes mixed with photochromic spiropyran. FT-IR, EDS, and XPS results confirm the successful coating of PDMS-SP upon melamine sponge. The resultant sponge not only possesses excellent water repellency with a contact angle of 154.5° and oil-water separation efficiency with an oil absorption capacity of 48–116 folds of itself weight, but also shows photochromic phenomenon between colorless and purple when it is successively exposed to UV irradiation and visible light.

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Preparation and Characterization of Tris(trimethylsiloxy)silyl Modified Polyurethane Acrylates and Their Application in Textile Treatment

Polymers ◽

10.3390/polym12081629 ◽

2020 ◽

Vol 12 (8) ◽

pp. 1629

Author(s):

Xuecheng Yu ◽

Ying Xiong ◽

Zhen Li ◽

Hongding Tang

Keyword(s):

Microphase Separation ◽

Triethylene Glycol ◽

Absorption Capacity ◽

Attenuated Total Reflection ◽

Water Mixture ◽

Water Contact ◽

Water Separation ◽

Cotton Textiles ◽

Oil Water Separation ◽

Oil Water

Three series of silicone modified polyurethane acrylate (SPUA) prepolymers were prepared from dicyclohexylmethane-4, 4′-diisocyanate (HMDI), PPG1000, triethylene glycol (TEG), 2-hydroxyethyl acrylate (HEA), and multi-hydroxyalkyl silicone (MI-III) with tris(trimethylsiloxy)silyl propyl side groups. Their structures were confirmed by 1H NMR, 13C NMR, and Fourier transformed infrared (FTIR) analysis, and SPUA films were obtained by UV curing. The properties of films were investigated by attenuated total reflection (ATR)-FTIR, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), water contact angle (WCA), thermogravimetric analysis (TGA), differential scanning calorimeter (DSC), water and hexane resistance, and tensile testing. The results showed that the structures and dosages of MI-III could influence the polymerization properties, surface properties, water and n-hexane resistance, and thermal and tensile properties of SPUA. For instance, the surface aggregation of tris(trimethylsiloxy)silyl propyl groups (even ~2.5 wt%) could endow SPUA films with less microphase separation, good hydrophobicity, lipophilicity, thermal stability, and mechanical properties. Interestingly, obvious regular winkles appeared on the surfaces of SPUAIII films, which are characterized by relatively high WCA values. However, relatively smooth were observed on the surfaces of SPUAIII films, which also exhibit lower water absorption ratio values. Furthermore, the ordinary cotton textiles would be transformed into hydrophobic and oleophilic textiles after treating with SPUA simply, and they were used in the oil/water separation study. Among them, consistent with water and hexane resistance analysis of SPUA films, SPUAII treated cotton textiles are characterized by relatively small liquid absorption capacity (LAC) values. Thus, phenyl groups and side-chain tris(trimethylsiloxy)silyl propyl groups are helpful to improve the hydrophobicity and lipophilicity of SPUA films. SPUAII-5 (even with 5 wt% MII) treated cotton textiles could efficiently separate the oil/water mixture, such as n-hexane, cyclohexane, or methylbenzene with water. Thus, this material has great potential in the application of hydrophobic treatment, oil/water separation, and industrial sewage emissions, among others.

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