Oil-water Separation Efficiency Research Articles

Superhydrophobic wood sponge with intelligent pH responsiveness for efficient and continuous oil-water separation

In recent years, the leakage of crude oil and the discharge of oily wastewater in industrial production have seriously endangered the water environment and ecological safety. Adsorbent materials with excellent oil-water separation performance play an important role in water purification. In this work, we employed a simple yet effective strategy to prepare highly compressible wood sponges. And with the prepared wood sponge as the substrate, the prepared pH-responsive copolymer was coated on the surface of the wood sponge by spraying method, and the pH-responsive superhydrophobic wood sponge was successfully prepared. The experimental results show that the wood sponge has excellent pH-responsive properties and can complete the transition of surface wettability between superhydrophobicity and hydrophilicity according to the change of pH value. The wood sponge has good oil adsorption capacity (12.72 g g−1), and reusability. Continuous oil-water separation can be carried out under the vacuum pump, and the oil-water separation efficiency in one separation cycle is above 92%. It has great application potential in the treatment of oily wastewater.

Intelligent optimization for modelling superhydrophobic ceramic membrane oil flux and oil-water separation efficiency: Evidence from wastewater treatment and experimental laboratory

Due to the significant energy and economic losses brought on by the global oil spill, there has been an increased interest in oil-water separation. This study presents strong non-linear machine learning models (support vector regression (SVR) and Gaussian process regression (GPR)) with the Response surface method (RSM) to predict the oil flux and oil-water separation efficiency of wastewater using ceramic membrane technology. For the model development and prediction of oil flux (OF) and oil-water separation efficiency (OSE), oil concentration (mg/L), feed flow rate (mL/min), and pH were considered as input variables. The input variables are combined in three combinations to study the most contributing input features to the models’ performance. Mean square error (MSE) and Nash-Sutcliffe coefficient efficiency (NSE) were used to assess the prediction performances of the developed models with the different number of input combinations considered in the study. For the two target variables (OF and OSE), GPR and SVR models were used to separately predict them. For OF, the SVR-2 [Combo-2] model (MSE = 0.9255 and NSE = 2.7976) performed better with higher prediction accuracy compared to GPR-2 [Combo-2] model (MSE = 0.763 and NSE = 6.437). In addition, for OSE, the GPR-3 [Combo-3] model (MSE = 0.995 and NSE = 0.5544) performed slightly better than SVR-3 [Combo-3] model (MSE = 0.992 and NSE = 0.8066). The results showed that the SVR model with the combo-2 and GPR-3 models for OF and OSE variables are the proposed models with the best performance and accuracy. This machine learning study will aid in better evaluating the function of materials such as ceramic in membrane performance features such as oil flux and rejection prediction, separation efficiency, water recovery, membrane fouling, and so on. As for academics and manufacturers, this machine learning (ML) strategy will boost performance and allow a better understanding of system governance.

Simple Fabrication of PDMS-Grafted Hydrophobic Iron Oxide Particles for Oil–Water Separation and Stimuli-Responsive Liquid Marbles

In this paper, poly(dimethyl siloxane) (PDMS) which is considered chemically unreactive was successfully grafted onto the surface of iron oxide particles, forming stable hydrophobic polymer-coated particles without the usage of any external stimuli like heat or UV irradiation. Here, magnetic hydrophobic particles were prepared by a facile method of coating PDMS prepolymer oil onto Fe3O4 particles via dispersion in a PDMS oil/hexane solution. The X-ray diffraction studies elucidated the successful synthesis of the magnetic particles, whereas the X-ray photoelectron spectroscopic studies ensure the successful incorporation of the polymer layer onto the particles. Two potential applications of the prepared particles were demonstrated here. The oleophilic and hydrophobic nature of the particles coated with PDMS is exploited to demonstrate the oil collection from the surface as well as in immersed conditions in an aqueous medium by using the particle-coated cotton and sponge, respectively. An oil–water separation efficiency of ∼95% was achieved for cotton and sponge against various oils with an oil adsorption capacity of 5 times and 11 times its own weight, respectively. Additionally, magnetic-responsive liquid marbles (LMs) were prepared by encapsulating liquids with the fabricated particles. Stable LMs were formed for a wide range of volumes (5–200 μL) with core liquids having different surface tensions, pH, and viscosity. The stability of the LM was tested using a dropping method and a hydrostatic pressure method.

The preparation of antifouling and superhydrophobic polyurethane sponge by grafting Econea to diisocyanate monomer for durable continuous oil/water separation and cleanup of oil spills

The oil-absorbent sponge is effective in the prevention and cleanup of offshore oil spills. However, biofouling in marine environments will significantly reduce its oil absorption capacity. Herein, a novel type of antifouling and superhydrophobic polyurethane (PU) sponge was successfully prepared via grafting Econea (antifouling agent) to diisocyanate monomer and hydrophobic modification of PDMS (Polydimethylsiloxane) and SiO2. The prepared PDMS-SiO2@PU-Econea sponge shows not only super-hydrophobicity with a WCA of 154.5° but also excellent antifouling properties with more than 99% of inhibition to Escherichia coli after immersed in artificial seawater (salinity ≈35‰) for 50 days. It can absorb 133.9 times of trichloromethane than its own weight and still maintain 98.5% of absorption after 50 cycles. In addition, the PDMS-SiO2@PU-Econea sponge exhibits excellent continuous oil–water separation performance. The separation fluxes of n-hexane and dichloromethane are 151.0 and 136.3 L·h−1·g−1, respectively, and the oil–water separation efficiency is up to 99.9%, it can absorb 50 times of crude oil than its own weight in 75 s. Therefore, the antifouling and superhydrophobic PDMS-SiO2@PU-Econea sponge is a promising and applicable oil absorbent sponge for long-term oil/water separation and cleanup of oil spills in marine environment.

Toughened polybenzoxazine coating matrix with improved comprehensive performance through hydrogen bond tuning with new polyurethanes

Polybenzoxazine has been explored in coating applications because of its excellent properties, including good processability, excellent thermal stability, and large water contact angles, but its toughness must be improved without compromising its other properties. Herein, a new serious of polyurethanes with varying numbers of ether groups were synthesized to enhance the toughness of polybenzoxazine via tuning the hydrogen bonds. The curing mechanism, chemical structures, and phase morphology of the blends are discussed. The results show that hydrogen bonding is the main reason for improved properties of the cured products. By varying the hydrogen bond content of the modified system, a champion toughness of 20.4 kJ/m2 without sacrificing processability, thermal stability, and coating performances can be realized, which the char yield is varied between 26.0 % and 28.9 % at 800 °C and corresponding coating hardness and adhesion can reach to 6H and 5B, respectively. Furthermore, the modified system-based coatings exhibit a reversible hydrophobic-hydrophilic state by different stimulus with a champion oil-water separation efficiency of 3379 L·m−2·h−1, illustrating their potential intelligent applications.

Design and preparation of ZnS superhydrophobic coating with self-healing property and oil-water separation function on stainless steel mesh surface

In order to prepare stainless steel mesh (SSM) with special wettability, long service life and suitable for oil-water separation research, micro-nano rough structure was constructed on the surface of SSM by the synergistic method of electrodeposition and solvothermal method. Finally, ZnS superhydrophobic coating (ZnS@SSM) with special wettability was successfully prepared on the surface of SSM by low-energy modification method. The wettability, microstructure and composition of the sample surface were analyzed by contact angle meter, field emission scanning electron microscope, X-ray diffractometer and Fourier infrared spectrometer. The results showed that the surface of ZnS@SSM was superhydrophobic, and the water contact angle was as high as 158°. The oil-water separation efficiency and reusability of the sample were characterized by an oil-water separation device, and the oil-water separation efficiency was 97.8%. The self-healing performance of ZnS@SSM was experimented by oxygen plasma etching, and it exhibited excellent durability performance.

Ultrafast sorption of micro-oil droplets within water by superhydrophobic-superoleophilic conical micro-arrays

Industrial wastewater and produced water, which often contains a certain amount of oil droplets, must be properly processed up to environmental standards before discharging, otherwise it could pose a serious threat to marine life, ecological environment, and human health. However, the oil–water separation in the presence of micro-oil droplets presents a significant challenge due to the very limited density gradient and complex interfacial structure at oil–water interfaces. To address this issue, we developed a superhydrophobic-superoleophilic surface with conical micro-arrays to realize ultrafast sorption of micro-oil droplets in water. The micro-oil droplets transport directionally from the apex to the bottom of the conical microcolumn. The movement velocity of the micro-oil droplet (0.2 μL) on the conical microcolumn is up to 14.5 mm/s and the oil–water separation efficiency reaches 99.99% without external pressure. Additionally, due to the difference in density, gravity, and buoyancy force in heavy and light oils, the movement velocity of Chloroform (11.5 mm/s) was much faster than N-hexane (0.1 mm/s) for the micro-oil droplet of 0.2 μL. With the increasing tilted angle the movement velocity of N-hexane becomes faster and Chloroform becomes slower. Thus, the large difference in movement velocity of micro-oil droplet is helpful to realize the separation of different oil phases. This work provides the theoretical basis and technical support to fabricate underwater apparatus that can efficiently recover oil droplets from a multiphase mixture.

Enhanced hydrophobicity of shell-ligand-exchanged ZIF-8/melamine foam for excellent oil-water separation

Oil and organic solvent spills have caused serious environmental issues. To address these issues, several novel materials have been developed for the efficient separation of oil/organic solvents from water. In this study, ZIF-8 was loaded onto a melamine foam (MF) skeleton a simple in situ growth method. ZIF-8/MF was modified via a shell-ligand-exchange reaction (SLER) to improve its hydrophobicity. The prepared D-ZIF-8/MF exhibited strong hydrophobicity, with a WCA of 145.1° and an OCA of 0°. D-ZIF-8/MF can absorb up to 68–165 times its weight in oil/organic solvents. D-ZIF-8/MF also exhibited excellent stability, corrosion resistance, recovery, and recyclability. Furthermore, D-ZIF-8/MF has a high oil-water separation efficiency for absorbing organic solvents through a continuous oil-water separation device. This study provides a novel strategy for the preparation of strong hydrophobic foams via surface modification and SLER for oil-water separation. It has immense potential for the scale-up practical treatment of oily wastewater.

Preparation of disc ceramic membrane by a printing and dip-coating method for oil-water separation

Efficient separating oil-water emulsion, it is required that ceramic membranes have the suitable membrane pore size, narrow pore size distribution and low membrane fouling. To realize it, thin and defect-free membrane separation layer should be directly prepared on the large pore size support surface, and the membrane under a dynamic filtration mode. In the present work, disc ceramic membrane without any transition layer was fabricated directly on the surface of support with a pore-size of 3.8 µm via a printing and dip-coating method. The mesh aperture and printing times regulate the thickness of printing layer, preventing the small alumina particles from penetrating into the support. Meanwhile, Dip-coating layer effectively eliminate the defects of the printing layer. Compared with common ceramic membranes, the prepared disc ceramic membrane has a low-cost and high permeability of 1946.6 L/m2·h·bar. Furthermore, the disc ceramic membrane can significantly mitigate membrane fouling and improve the oil-water separation efficiency (>99.5%) under a dynamic membrane filtration mode. This study suggests the practicability of printing and dip-coating method to prepare the disc ceramic membrane with high performance.

Superhydrophobic DTMS/rGO-nanocomposites modified polyurethane sponge for efficient oil–water separation

ABSTRACT Dodecyltrimethoxysilane (DTMS)-modified reduced graphene oxide (rGO) nanocomposites were incorporated into polyurethane (PU) sponges by a combination of dip-coating and thermal curing reduction reaction to obtain a novel superhydrophobic DTMS-rGO-PU sponge for effective oil/water separation. The reaction conditions, such as the dip-coating solution concentration, the thermal curing reduction temperature, and the reaction time were demonstrated to be key factors in forming hierarchical DTMS-rGO nanocomposites, which significantly affected the surface wettability of the PU sponge. The resulting DTMS-rGO-PU sponge with a static water contact angle (WCA) of 152.2° displayed superior superhydrophobicity, and achieved an oil–water separation efficiency of 99.89% for various oil/water mixtures. This superhydrophobic sponge also showed minimal deterioration in its high oil adsorption capacity after 100 recycled adsorption operations. Furthermore, the as-prepared DTMS-rGO-PU sponge was proven to be physically and chemically stable and durable in harsh environmental conditions, suggesting its potential for industrial applications in oil spillage management.

Fabrication of Photo-Responsive Mesh Membrane with Surface-Engineered Wettability for Oil-Water Separation and Photocatalytic Degradation of Organic Pollutants.

A photo-responsive TiO2-coated stainless-steel mesh membrane (TiO2@SSM), possessing unique surface wettability, was fabricated. This TiO2@SSM membrane is found to be capable of separating oil and water from oily water and has the potential to carry out photocatalytic self-cleaning and/or the degradation of organic pollutants present in water. The fabrication of TiO2@SSM is quite simple: titanium dioxide (TiO2) nanoparticles were spray-coated onto stainless steel microporous mesh (SSM) substrates and annealed at the temperature of 500 °C. The fabricated TiO2@SSM membrane was structurally and morphologically characterized by XRD, FE-SEM, EDX, and elemental mapping. The contact angle measurements using a goniometer showed that the fabricated TiO2@SSM membrane surface is superhydrophilic and superoleophilic in air and superoleophobic under water. This is a favorable wetting condition for the water passing oil-water separation membrane, and this water passing property of the membrane eased the common problem of the fast clogging of the membrane by oil. An oil-water separation efficiency of about 99% was achieved, when the TiO2@SSM membrane was used as the separating medium in the gravity-driven oil-water separation system, unlike the uncoated stainless steel mesh membrane, which allowed both oil and water to pass together. This confirmed that the oil-water separating functionality of the membrane is attributed to TiO2 coating on the stainless steel mesh. The photocatalytic degradation property of the TiO2@SSM membrane is an added advantage, where the membrane can be potentially used for self-cleaning of the membrane's surface and/or for water purification.

Rational design of self-cleaning superhydrophobic coating with outstanding abrasion resistance and weatherability: Towards highly efficient oil-water separation and anti-corrosion application

The importance of superhydrophobic coating in modern industries cannot be overstated. However, conventional superhydrophobic coatings are challenged by poor mechanical stability, single functionality, and toxic content (fluorine element), which pose a challenge to the large-scale use of superhydrophobic coatings. Herein, a MOF-based superhydrophobic coating is proposed, which is constructed by introducing self-designed small-molecule resins combined with modified ZIF-8 particles through a one-step spraying method. Notably, the coating exhibits excellent superhydrophobicity (CA = 169.05°, SA = 3.7°), mechanical stability (CA > 155° after 200 cm of wear), high oil-water separation efficiencies (for oil-water mixture separation efficiency up to 98.57 %) and satisfactory anti-corrosion property. The superior performance of the coating comes from the layer-by-layer structure formed by the γ-AP resin-coated ZIF-8 particles after curing, which the silicone in the resin forms a dense cross-linked network on the surface of the coating. In summary, ZIF-8/HDTMS/γ-AP coating not only has the advantages of a simple preparation process, wide application range, and no secondary pollution but also has excellent mechanical properties, high oil-water separation efficiency, and satisfactory corrosion resistance, which can provide new ideas to expand the application scope of superhydrophobic coating.

Membrane wettability manipulation via mixed-dimensional heterostructured surface towards highly efficient oil-in-water emulsion separation

Membranes with super-wetting surface work well at separating oil-water mixtures, but efficient and continuous separation of surfactant-stabilized oil-in-water emulsion is difficult to achieve due to widely spread oil droplet size and stable droplet nature. This work reported a mixed-dimensional heterostructured oil-water separation membrane with electrospun hydrophobic polydimethylsiloxane/polyvinylidene fluoride (PDMS/PVDF) nanofibers on top of a hydrophilic polyaniline (PANI) coated microfiltration membrane support. It is discovered that small oil droplets are captured and coalesced by the hydrophobic-oleophilic PDMS/PVDF nanofibers, while water passes through the membrane from uncovered hydrophilic PANI micro-regions. Precise regulation on the proportion of hydrophilic and hydrophobic regions is achieved by controlling the electrospinning conditions, and highly efficient oil-in-water emulsion separation is thus accomplished with membrane pore size much larger than emulsified oil droplets. Multi-cycled and long-term crossflow separation experiments result in relatively stable membrane flux and oil-water separation efficiency higher than 99%, as coalesced larger oil droplets are continuously removed from the membrane surface by shear flow. Such heterostructured membranes with highly tunable wettability could therefore combine the merit of good separation efficiency and operation stability for practical surfactant-stabilized oil-in-water emulsion separation.

Dynamic Simulator for Three-Phase Gravity Separators in Oil Production Facilities.

In this study, a dynamic simulator for three-phase gravity separators in oil production facilities is proposed. The mass conservation equation is established to calculate the pressure, water level, and oil level in the separator and the mass balance equation of the dispersed phase to calculate the oil-water separation efficiency. The proportional integral controllers are applied to control the water level, oil level, and pressure in the separator by setting the opening of the three outlet valves of oil, gas, and water. The model is verified using field data by means of the given valve opening and given proportional integral controller parameters, respectively. Subsequently, the verified simulator is applied to study the dynamic behavior of the separator filling process and the effect of pressure, oil level, and water level setpoint changes on the separator operating status. A detailed analysis of the changes in the liquid level, pressure, and opening of three outlet valves is presented. Then, the effects of operating conditions such as the inlet flow, water setpoint, and weir height on the separation efficiency are discussed. This simulator can be applied for the design of oil, gas, and water three-phase separation processes. In addition, through this simulator, the parameters that are difficult to be measured by instruments during the operation of the separator can be calculated, providing technical support for the construction of the digital twin of the separator.

Cleanup of oils and organic solvents from contaminated water by biomass-based aerogel with adjustable compression elasticity

Leakage of oils and organic solvents poses a significant threat to aquatic environments. Here, low-temperature carbonized aerogels with highly porous and anisotropic structures obtained only from biomass-derived materials were proposed to absorb polymorphic oils from contaminated water. Specifically, carbonized aerogels prepared at temperatures of 300 °C and 350 °C exhibited ultra-high absorption capacities (40‒125 g g−1) and oil-water separation efficiencies (> 99%) even in harsh environments, which were attributed to their exceptional properties, including high porosity, abundant macropores, excellent thermal stability, and hydrophobicity. Through citric acid crosslinking and low-temperature carbonization, the aerogels exhibited superior compression elasticity and could be cyclically utilized through simple extrusion while realizing the recovery of oils. Moreover, the outstanding photothermal conversion properties obtained through carbonization contributed to the high temperature and fluidity of the oils surrounding the aerogels, which is crucial for improving the absorption performance of high-viscosity oils. Such absorbent materials are used to separate crude oil from oil-water mixtures, which can achieve maximum absorption of 56 g g−1 and increase the absorption rate (from several days to 10 min) in a low-temperature (4 °C) seawater environment.

Green tubular micro/nano architecture constructed by in-situ planting of small AgNPs on Kapok fiber for oil spill recovery, smart oil–water separation and multifunctional applications

The ubiquitous existence of harmful contaminants in water is recognized as a major threat to aquatic ecosystems and human health, and renewable, economical, and superefficient new materials are needed to eliminate these dangers. Here, the ultrasmall silver nanoparticles (AgNPs) anchored Kapok fiber (KF) (KF/AgNPs) composite capable of efficiently separating various oil–water systems and eliminating other pollutants or bacteria was prepared by a green self-reducing reaction process using natural KF as the “microreactor” and water as the only solvent. The introduction of AgNPs endows KF/AgNPs with significantly improved liquid storage capacity, underwater superoleophobicity and underoil superhydrophobicity, so it shows excellent switchable oil–water separation capability. The oil–water separation efficiencies under gravity reached 99.90 % for the oil-in-water (O/W) emulsion (water flux: 1300 L·m−2·h−1), 99.91 % for the water-in-oil (W/O) emulsion (oil flux: 1500 L·m−2·h−1), and 99.80 % for the immiscible oil–water mixture (flux: 1900 L·m−2·h−1). In addition, KF/AgNPs composite can serve as absorbents to remove oil slicks from sewage (removal efficiency: 99.95 %; absorption capacity: 42.3 g/g) and adsorbents to rapidly remove microplastics in actual natural waters (concentration: 10 mg/L and can inhibit the growth of E. coli bacteria. After use, approximately 96.4 % of Ag was recovered from spent composite, and an excellent biochar adsorbent for the dye was obtained simultaneously.

Robust superhydrophobic magnetic melamine sponge inspired by lotus leaf surface for efficient continuous oil–water separation

Inspired by the oily surface layer and hierarchical structure on the lotus leaf surface, a magnetic sponge with robust superhydrophobicity (water contact angle up to 155°) and surface protection was synthesized by one-pot solvothermal method by introducing (3-Mercaptopropyl)trimethoxysilane into the melamine sponge. After hydrolysis and self-polymerization, (3-Mercaptopropyl)trimethoxysilane can grow as a low surface energy polysiloxane coating on the surface of sponges and magnetic particles. It not only provides a hydrophobic surface layer for sponges, but also this cooperation of micro-submicron-nanostructure from micron sponge skeleton, submicron Fe3O4 particles and nanoscale polysiloxane builds rough surfaces at multiple scales. Based on the triadic Koch curve model, the theory of superhydrophobic surface is elucidated in detail from the surface fractal behavior, fractal dimension, and surface composition. The sponge can be integrated into a negative pressure system as a filter element for continuous and efficient oil–water separation. The formed polysiloxane can not only provide protection for the sponge skeleton and magnetic particles, but also provide strong cross-linking between the two materials, which can effectively resist the damage to the functional structure caused by oil erosion. In addition, a conceptual diagram of a portable oil suction device similar to a vacuum cleaner was proposed. Combining the basic theory of robust superhydrophobic surface and innovatively clarifying the influence of filter element structure on oil–water separation efficiency from the perspective of interface force, it is expected to bring more practical and potential ideas for the design of a portable vacuum cleaner-like oil–water separation device.

Constructing a highly tough, durable, and renewable flexible filter by epitaxial growth of a glass fiber fabric for high flux and superefficient oil-water separation

The separation and purification of complex and stable stubborn oily sewage is extremely challenging. To respond to this challenge, we developed a powerful flexible filter with ultrahigh strength, durability, flux, separation efficiency, and a multiobjective separation function based on a universal epitaxial growth process of glass fiber fabric (Gf). The underwater oil contact angle (UOCA) of the silicate@Gf (MgSi@Gf) filter is 156.3°, so it can achieve both an ultrahigh permeation flux (5632.7 L·m−2·h−1) and oil-water separation efficiency (99.5%) under gravity (≈ 1 kPa) in purifying surfactant-stabilized emulsions, actual industrial oily sewage and mechanical cold rolling emulsions. The filter with a high tensile strength (66.5 MPa) and oil invasion pressure (4626 Pa) can withstand the impact of much sewage or intense water flow. The filter can tolerate extreme conditions and can maintain high separation performance in acid or alkaline (pH 1–13), high or low temperature (100 °C, 200 °C, −18 °C) conditions or natural salty waters such as seawater. The filter can remove methylene blue (MB) dye (99.8%) by filtration, and can be repeatedly and easily reconstructed (renewable advantage). The filter shows great potential for efficiently eliminating the hazards of contaminants in actual oily sewage and thus protect human health.

Synergistic effect of MOFs and PMHS on robust cotton fabric for promoted hydrophobic and UV-resistance

The use of auxiliaries for textile dyeing and printing and the release of residual dyeing liquor cause enormous harm to the environment, while the single function of dyed fabrics hinders their development in more advanced fields. In this work, zeolitic imidazolate framework-8 (ZIF-8) nanocrystals were grown in situ on carboxymethyl cotton fabric to absorb acid dyes without auxiliaries. To further improve its durability and color fastness, polymethylhydrosiloxane (PMHS) hydrophobic coating was used to protect its surface. The as-prepared cotton fabrics exhibited a K/S value of 21.78, a hydrophobic angle of 160.2° and a UPF value close to 50+. They showed high stability under various environmental conditions, which provided a simple and enviromental way to prepare multifunctional dyed textiles. The high hydrophobic angle of the fabric offered excellent adsorption of oil agent in the oil–water mixture, and the oil–water separation efficiency can still reach more than 95% even after 20 cycles, indicating that the fabric also had promising applications in the treatment of oiled wastewater.

One-pot preparation of superhydrophobic lignocellulose composites and their oil-water separation properties

ABSTRACT Lignocellulose is a kind of renewable material with stable structure and abundant reserves. The superhydrophobic lignocellulose composites prepared by one-pot method in this study had the advantages of pollution-free, stable structure and simple processes. The prepared superhydrophobic lignocellulose composites exhibited superhydrophobic-superoleophilic wettability, with a water contact angle (CA) of 157° ± 3.6° and an oil CA of about 0°. Abrasion and ultraviolet (UV) radiation experiments demonstrated that the prepared composites had good mechanical stability and UV resistance. In addition, the composites presented an ultra-fast oil absorption rate and high oil-water separation efficiency of more than 96% for various types of oil-water mixtures. And the maximum oil flux was greater than 6500 L·m−2h−1bar−1. Such superhydrophobic lignocellulose composites hold great application prospects in the field of oil-water separation.