Sponge Surface Research Articles

Melamine sponge decorated with Fe 3 O 4 /CuS nanoparticles as novel peroxidase‐like nanozyme for disinfection

A melamine sponge-supported Fe3O4/CuS nanozyme with highly peroxidase-like activity was fabricated using polydopamine (PDA) as adsorption agent (named as S/PDA/Fe3O4/CuS). Fe3O4 and CuS nanoparticles were well dispersed on the surface of melamine sponge. Effects of reaction parameters such as temperature and solution pH on peroxidase-like activity were investigated. S/PDA/Fe3O4/CuS exhibited highly disinfection efficiency against both Escherichia coli and Staphylococcus aureus in the presence of trace H2O2 (100 μm). ·OH radicals were found to be the main reactive oxygen species.

Mg-calcite CaCO3 particle: Rapid synthesis and application in fabrication of environmentally friendly hydrophobic polyurethane sponge for oil–water separation

The hydrophobic modification of polyurethane (PU) sponge is attracting considerable attention in the field of oil–water separation. A hydrophobic PU sponge with microsize cavities on the skeleton surface and interior was prepared with hierarchical structural Mg-calcite CaCO3 (MCC) particles as a template. Hydrophobic-modified MCC particles with controllable morphologies were firstly synthesized by a facile and rapid batch method under high-speed stirring for 1 min by the presence of cetyltrimethyl ammonium bromide. MCC particles were then blended into the starting foaming materials to fabricate hydrophobic PU/MCC sponge by in-situ polymerization method. Finally, MCC particles of PU/MCC sponge were etched by acid solution and microsize cavities were generated on the surface and interior of EPU/MCC sponge skeleton. The oil-adsorption capacity of obtained hydrophobic EPU/MCC sponge was 7.58 and 5.31 times higher than pristine PU sponge for engine oil and sunflower oil, respectively. This could be attributed to the microsize cavities on the skeleton surface and interior which would increase the skeleton flexibility and enhance adhesion level between the oil and sponge surface. The underwater CCl4 was completely adsorbed into the EPU/MCC sponge within 1 s, indicating its high adsorption speed. EPU/MCC sponge exhibited high separation selectivity and separation efficiency in gravity-driven oil-water separation. The results could provide a strategy to develop hydrophobic sponges with excellent oil-water separation property.

High connectivity hierarchical porous network of polyurethane engineered by nanoflakes for proficient oil recovery

Development of absorbent material for oil and organic solvents is critical for removing contaminants from the water surface. Advancement of an oil absorber with a significant contribution for structural parameters of porous configuration of materials is highly coveted in order to ensure crude oil supply for future generations. In this study, we demonstrate structural parameters of the pores of surface modified two-dimensional (2D) CuSe nanoflakes engineered polyurethane (PU) sponge, with combination of synergistic low surface energy and surface roughness, playing an important role in the efficient removal of oil from water. Due to large surface of porous sponge and two dimensional nanoflakes along with their interface, the system showed an efficient crude oil uptake capacity of more than 37 times of its original mass. Furthermore, the developed system can be recycled and reused 50 times while maintaining high crude oil absorption efficiency, and even after 50 cycles, the system has retained good recycling absorption capacity, indicating the brilliance of the system. In addition, the system has promising implications as a favorable absorbent for crude oil–water separation due to its quick absorption (1.5 s) and high separation efficiency (96%). The selective absorption efficiency, quick oil-absorption rate, large amount of oil separation with high efficiency under one platform, has been implemented in a device for technological application in large scale.

Nonflammable, robust and recyclable hydrophobic zeolitic imidazolate frameworks/sponge with high oil absorption capacity for efficient oil/water separation

Developing robust sponge-based materials with high oil capacity and excellent flame resistance for oil spill cleanup is significant. Herein, a highly hydrophobic composite sponge material for oil-water separation, containing a melamine-formaldehyde (MF) sponge substrate and zeolitic imidazolate framework-8 (ZIF-8) coating was fabricated through the simple amino-assisted in-situ growth of ZIF-8 onto the strut surface of MF sponge. The successful integration of MF sponge and ZIF-8 nanoparticles in one composite material was confirmed by scanning electron microscopy, X-ray diffraction and nitrogen sorption. The synergistic effect of the MF substrate and ZIF-8 coating significantly improved its flame resistance. Combining the advantage of the MF substrate and the hydrophobic ZIF-8 nanocrystals, the ZIF-8/MF composite sponge showed high porosity and good hydrophobicity with a water contact angle of 130°. A high adsorption capacity towards various oils was achieved in the range of 76–164 g g−1. Besides, the ZIF-8/MF composite sponge exhibited excellent separation performance for light oil/heavy oil-water mixtures via adsorption and/or gravity-driven separation. In addition, owing to its compressibility and mechanical stability, the ZIF-8/MF composite sponge could be easily regenerated by a simple squeezing method and showed excellent recyclability for the oil adsorption. These features make the ZIF-8/MF composite sponge promising for highly efficient oil-water separation.

An asymmetric wettable PCL/chitosan composite scaffold loaded with IGF-2 for wound dressing.

An effective dressing is essential for wound healing. In fact, the wettability performance is one of the most important factors of a wound dressing. The fundamental functions of a wound dressing involve the absorption of excess exudates and maintenance of optimal moisture at the wound by controlling water evaporation. Here, we designed a type of chitosan (CS) sponge and PCL nanofibrous membrane composite dressing with asymmetric wettability surfaces as wound healing materials for biomedical applications. The hydrophobic surfaces of the composite dressing were waterproof and could efficiently control the water vapor transmission rate, whereas the hydrophilic surface of the CS sponge had good cytocompatibility and water-absorbing capability. Insulin-like growth factor-2 (IGF-2) was added to the CS sponge, and exhibited a stimulatory effect on fibroblasts migration and proliferation. Therefore, the fabricated CS sponge and PCL membrane composite dressing had excellent cytocompatibility, vapor transmission rate, and liquid absorption and asymmetric wettability, suggesting its potential as a promising alternative to traditional wound dressing.

Preparation of FeOOH supported by melamine sponge and its application for efficient phosphate removal

Water eutrophication caused by the excessive discharge of phosphate has been a topic theme in decades and phosphate removal from aqueous solution is of great significance. Adsorbents of iron (hydroxyl)oxides particles exhibited its great potential in environmental pollution remediation. However, iron (hydroxyl)oxides are easy to aggregate, resulting in the decreased reactivity. In this study, we immobilized FeOOH on the surface of melamine sponge (MS). The characterization results of scanning electron microscope (SEM), energy dispersive spectrometer (EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) revealed that FeOOH was well-dispersed on melamine sponge. Further phosphate removal experiments results elucidated that the maximum phosphate adsorption capacity of the synthesized material (FeOOH@MS) was 115.5 mg P/g when the theoretical mass ratio of Fe to MS was 5:1. Meanwhile, the physical adsorption with electrostatic attraction and chemical adsorption with the formation inner-sphere complex were involved for phosphate treated by FeOOH@MS without pH adjustment. Subsequently, we investigated the phosphate removal performance of FeOOH@MS in a packed column, and found that capacity of phosphate removed by FeOOH@MS reached 11.3 mg/g, and the packed column with FeOOH@MS would be penetrated at 1201 BVs around 41 h, suggesting that application of FeOOH@MS to treat phosphate-contained wastewater was feasible. Moreover, when the phosphate-containing lake water was treated with FeOOH@MS, the algae growth in the treated water was significantly inhibited, indicating that FeOOH@MS could be utilized to control the water eutrophication. Overall, this study provided a promising adsorbent for phosphate-contained water treatment.

Flame-resistant bifunctional MOF-based sponges for effective separation of oil/water mixtures and enzyme-like degradation of organic pollutants

Water pollutions that come from spilled oils, discharged organic reagents and abused pesticides have become an urgent problem to ecosystem. In this study, inspired by the multi-properties of MOF materials, we presented a bifunctional MOF-based sponge (OPA-UiO-66 @MF) to achieve the effective oil/water separation as well as the catalytic degradation of organic pollutants. On one hand, upon the in-situ growth of UiO-66 on melamine foam (MF) sponges and the octadecyl-phosphonic acid (OPA) modification of UiO-66, we highlighted the superhydrophobic/superoleophilic property of the OPA-UiO-66 @MF, which leads to excellent performances in oils adsorption and continuous oil/water separation. On the other hand, benefits from the lipase-like property of UiO-66, OPA-UiO-66 @MF was proved having potential ability in the catalytic degradation of carboxylic acid ester pesticides which are usually enriched in oils or organic solvents. Moreover, since phosphorus containing groups can be introduced onto the surface of sponge through OPA modification, OPA-UiO-66 @MF also displayed superior flame resistance. As an effective, safe and green material, the developed flame-resistant bifunctional OPA-UiO-66 @MF sponge might provide a promising application in the elimination of organic pollutants in water systems.

Performance and mechanism of adsorption during synergistic photocatalytic degradation of tetracycline in water under visible (solar) irradiation

The removal of antibiotics from water using solar (visible) light catalytic technology has the advantages of high efficiency, safety, and environmental friendliness. The bismuth tungstate semiconductor catalyst Bi2WO6 exhibits superior performance; however, further research is required to elucidate its synergistic catalytic effects and to better understand its adsorption performance. Herein, a series of modified bismuth tungstate catalysts were prepared by introducing various dispersants. Advanced characterization methods were employed to reveal the structure and composition of the Bi2WO6 catalyst, and the preparation conditions of modified Bi2WO6 were optimized by investigating the adsorption and photocatalytic properties of the catalysts. The synergistic effects of catalyst adsorption and visible light catalysis significantly enhanced the removal of tetracycline through a mechanism whereby the pollutants were enriched on the surface of the catalyst owing to its superior adsorption capacity; this provided a sufficient reaction microenvironment for photocatalytic degradation. The catalyst was loaded onto a sponge surface and subjected to continuous-stream catalysis in a reactor for the degradation of tetracycline-containing wastewater (influent pollutant concentration = 0.8 mg/L). This sponge-loaded Bi2WO6 catalyst was used with a dosage of 0.6 g/L under a light source intensity of 140000 Lux and illumination for 2-h intervals. A hydraulic retention time (HRT) of more than 6 h was observed, and the system achieved a degradation efficiency for trace tetracycline up to 97%, while exhibiting good operational effects after continuous operation for 12 d.

Phytic acid and graphene oxide functionalized sponge with special-wettability and electronegativity for oil-in-water emulsion separation in single-step

Developing an emulsion separation material with one-step in-situ purifying capability and improved security in applications, especially for subsequent scale-up, is valuable but remains a challenge. Herein, the amphiphilic sponge (PA@RGO@MS) was prepared via impregnation and in-situ growth of the negatively charged hydrophilic phytic acid (PA) and the hydrophobic reduced graphene oxide (RGO) on the surface of the melamine sponge (MS) and applied in emulsion purification. The mechanics, wettability, absorption performance of the PA@RGO@MS were analyzed to identify its potential for stable demulsification. Results show that the PA@RGO@MS could purify emulsions (turbidity removal rate = 99.7%; TOC removal rate = 94.14%) in-situ in one step by simple shock absorption, profited from the hydrophilic and demulsification capability of PA, oil absorption of RGO, and wide reaction and storage space of MS. Targeting the emulsion with distinct properties (density, viscosity, and concentration) of the oil phase, the PA@RGO@MS could efficiently enable the purification. Meanwhile, the powerful flame-retardant granted from PA ensures the safe shipment and storage of sponges. The favorable cyclability (turbidity removal rate > 98.5% and TOC removal rate > 89.5% after 10 cycles) and diversified operating modes enhance the practical value of the PA@RGO@MS.

Enhancing output performance of surface-modified wood sponge-carbon black ink hygroelectric generator via moisture-triggered galvanic cell

A promising strategy to use alkali and alkaline earth metals chloride as an ideal high-efficiency atmospheric moisture catcher has been introduced in hygroelectric generator (HEG) engineering. However, the achievement of high output power density for commercial electronics by most HEGs is challenging. To address this issue, a novel approach is proposed to generate highly efficient HEGs. The approach relies on the use of carbon black (CB) ink to modify the surface of wood sponge with an LiCl solution, and copper electrodes to generate a highly efficient device with the power output of 216 μW. Specifically, the primary battery system composed of Cu electrodes and CB ink in water interface can compensate for decrease in streaming potential to further improve the output performance of the system, and successfully solve the problem of low output power of HEGs as an independent power source. Furthermore, the influences of different electrodes on electricity generation are comprehensively and systematically investigated for the first time. Moreover, the open-circuit voltage (VOC) of a HEG can be boosted to 33 V by simple integration in series, and it can drive commercial electronic devices in various weather conditions. It is anticipated that this new approach will facilitate the growth of green electronics in the future.

Superhydrophobic polyurethane sponge based on sepiolite for efficient oil/water separation

Massive oil leakage accidents and illegal discharge of oily wastewater have not just destroyed the sustainability of the ecological environment but caused permanent damage to marine ecosystems, which makes it urgent to handle it. In this paper, by means of sol-gel, micro-nan silica that grew from the surface of fibrous sepiolite was organically modified with 1 H, 1 H, 2 H, 2 H-perfluorodecyltriethoxysilane (PFDS). The superhydrophobic sepiolite/silica firmly attached to the surface of polyurethane sponge under the action of oily epoxy resin with strong adhesion. The sponge exhibited superhydrophobicity and excellent selective oil adsorption capacity (19.98–40 times of their own weight). More importantly, besides the effective separation of immiscible oil-water mixtures (the separation rate reached 98.72%), it could also efficiently separate oil with water and oil with salt solution emulsions. In addition, the sponges kept hydrophobic even after floating in extremely corrosive liquids for 20 h, showing a strong resistance to strong acidic as well as alkaline liquids. After 100 times of mechanical compression, the three-dimensional structure of sponge held still and the water contact angle was greater than 144°, demonstrating an excellent mechanical stability, which provided a reference for its practical application in oil-water separation.

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO2-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Oily wastewater and oil spills pose a threat to the environment and human health, and porous sponge materials are highly desired for oil/water separation. Herein, we design a new superhydrophobic/superoleophilic TiO2-decorated polyvinyl alcohol (PVA) sponge material for efficient oil/water separation. The TiO2–PVA sponge is obtained by firmly anchoring TiO2 nanoparticles onto the skeleton surface of pristine PVA sponge via the cross-linking reactions between TiO2 nanoparticles and H3BO3 and KH550, followed by the chemical modification of 1H,1H,2H,2H-perfluorodecyltrichlorosilane. The as-prepared TiO2–PVA sponge shows a high water contact angle of 157° (a sliding angle of 5.5°) and an oil contact angle of ∼0°, showing excellent superhydrophobicity and superoleophilicity. The TiO2–PVA sponge exhibits excellent chemical stability, thermal stability, and mechanical durability in terms of immersing it in the corrosive solutions and solvents, boiling it in water, and the sandpaper abrasion test. Moreover, the as-prepared TiO2–PVA sponge possesses excellent absorption capacity of oils or organic solvents ranging from 4.3 to 13.6 times its own weight. More importantly, the as-prepared TiO2–PVA sponge can separate carbon tetrachloride from the oil–water mixture with a separation efficiency of 97.8% with the aid of gravity and maintains a separation efficiency of 96.5% even after 15 cyclic oil/water separation processes. Therefore, the rationally designed superhydrophobic/superoleophilic TiO2–PVA sponge shows great potential in practical applications of dealing with oily wastewater and oil spills.

Electrochemical degradation of antibiotics using flow-through graphene sponge electrodes

Graphene sponge electrodes doped with atomic boron and nitrogen were employed for electrochemical degradation of antibiotics sulfamethoxazole, trimethoprim, ofloxacin, and erythromycin. The removal of antibiotics that displayed strong π-π interactions (i.e., ofloxacin) with reduced graphene oxide (RGO) coating was less limited by the mass transfer and removal efficiencies > 80% were observed for the investigated range of electrolyte flowrates. At the highest applied flowrate (700 LMH), increase in the anodic current significantly worsened the removal of trimethoprim and erythromycin due to the detrimental impact of the evolving gas bubbles. Increase in current at 700 LMH led to a stepwise increase in the removal efficiency of sulfamethoxazole due to its enhanced electrosorption. Electrochemical degradation was achieved via ozone, hydrogen peroxide and hydroxyl radical (•OH). Extraction of the employed graphene sponges confirmed the degradation of the strongly adsorbing antibiotics. Identified electrochemical transformation products of erythromycin confirmed the participation of •OH, through N-demethylation of the dimethylamine group. In real tap water, removal efficiencies were lower for all target antibiotics. Lower electric conductivity of tap water and thus increased thickness of the electric double layer likely limited their interaction with the graphene sponge surface, in addition to the presence of low amounts of organic matter.

A Robust Superhydrophobic Polyurethane Sponge Loaded with Multi-Walled Carbon Nanotubes for Efficient and Selective Oil-Water Separation.

The influence of different coupling agents and coupling times on the wettability of a polyurethane (PU) sponge surface were optimized. Octadecyltrichlorosilane (OTS) was selected as the optimal coupling agent to prepare the superhydrophobic sponge. The superhydrophobic sponge was prepared in one step, which has the advantages of simple operation and enhanced durability. The superhydrophobic sponge was characterized by scanning electron microscopy, Teclis Tracker tensiometry, and Fourier transform infrared (FT-IR) spectrophotometry. The water contact angle increased from 64.1° to 151.3°, exhibiting ideal superhydrophobicity. Oils and organic solvents with different viscosities and densities can be rapidly and selectively absorbed by superhydrophobic sponges, with an absorption capacity of 14.99 to 86.53 times the weight of the sponge itself, without absorbing any water. Since temperature affects the viscosity and ionic strength of oil, and influences the surface wettability of the sponges, the effect of temperature and ionic strength on the oil absorption capacity of the superhydrophobic sponges was measured, and its mechanism was elucidated. The results showed that the absorptive capacity retained more than 90% of the initial absorptive capacity after repeated use for 10 times. Low-cost, durable superhydrophobic sponges show great potential for large-scale oil-water separation.

Robust Superhydrophobic rGO/PPy/PDMS Coatings on a Polyurethane Sponge for Underwater Pressure and Temperature Sensing.

Flexible wearable pressure sensors have attracted great interest from researchers in recent years because of their important applications in human-machine interaction, human behavior detection, medical diagnosis, and other fields. At present, integrating multiple functions such as pressure and temperature sensing and self-cleaning into a single material remains a challenging task. Here, by in situ reduction of graphene oxide (GO) grown on a sponge surface and deposition of polypyrrole (PPy) nanoparticles, we have built a highly sensitive, stable, and multifunctional rGO/PPy/poly(dimethylsiloxane) (PDMS) polyurethane (PU) sponge (GPPS) sensor for the detection of pressure, water level, and temperature. This multifunctional sensor shows excellent pressure-sensing performance, ultrasensitive loading sensing of a leaf (98 mg), and outstanding reproducibility over 5000 cycles. Due to the stability of the superhydrophobic surface water contact angle (WCA) = 153.3°, our sensor can work in an underwater environment, which can sense water levels from 1 cm (∼98 Pa) to 40 cm and also a variety of underwater behaviors (knock, ultrasonication, blow, etc.) with high stability. In addition, the sensor can be integrated into a circuit for the water level and pressure detection. The sensor can also be used as a smart underwater-temperature sensor; it shows a linear temperature coefficient of resistance (TCR) of 0.48% °C-1 in a temperature range of 35-80 °C. This multifunctional sensor shows potential application prospects in wearable electronic devices for sensing.

Droplet motion on flexible superhydrophobic porous sponge surface

Droplet capture and release are very significant for droplet manipulation on a superhydrophobic surface. Once the aqueous droplets impact the stiff superhydrophobic surface, they easily detach from the surface and generate chaotic motion without much energy loss. Thus, it is difficult to catch and manipulate the droplets falling on these kinds of surfaces. In this study, a droplet was captured after impacting the superhydrophobic porous sponge. Most of the kinetic energy of a falling droplet is transferred into the elastic potential energy of a sponge. The absorbed energy in the deformation process and the elastic modulus of sponge were adjusted by the porosity of the sponge. With the decrease in density, the elastic modulus of the sponge decreases, and the energy loss increases. During the droplet impacting process, the sponge with smaller elastic modulus can obtain much more energy from the droplet, which makes it easy to drag and capture the droplet. This new design also has other potential applications, such as water collection and fog harvest.

Fibrous polyester sponge modified with carboxymethyl cellulose and Zeolitic imidazolate frameworks for methylene blue dye removal in batch and continuous adsorption processes

Zeolitic imidazolate framework materials belong to an important class of Metal-organic frameworks that show attractive applications in various fields including adsorption and chemical separation. In this study, nonwoven fibrous polyester sponge surface was modified by cross-linked carboxymethyl cellulose and synthesized ZIF-8 and used to remove methylene blue dye from aqueous solution. The prepared filter was characterized using Field Scanning Electron Microscopy, Fourier Transform Infrared Spectrometer, X-ray Diffraction, and nitrogen adsorption-desorption analyses, and effects of contact time and dye concentration were investigated in batch and continuous fixed bed dye adsorption processes. Batch kinetics experimental data were estimated with the models of pseudo-first-order, pseudo-second-order, Elovich, and intra-particle, and continuous kinetics experimental data were estimated with Thomas, Adams-Bohart, and Yoon-Nelson models. Batch and continuous adsorption kinetics were more consistent with the pseudo-second-order and the Yoon-Nelson models, respectively. The filter adsorption capacity were 0.824 and 0.829 mg/g in continuous and batch systems at initial concentration of 8 mg/L, respectively. With increasing initial dye concentration from 2 to 8 mg/L, the adsorption capacity was increased about 80 and 90% in batch and continuous systems, respectively. By regeneration experiments after 5 cycles, acceptable results were observed.

Ni–Al layered double hydroxides modified sponge skeleton with polydopamine coating for enhanced U(VI) extraction from aqueous solution

Uranium (VI) (U(VI)) is a major fuel for nuclear power, and the mass of it in seawater is about 4.5 billion tons. However, many current U(VI) adsorbents exist in the form of powder, which hinders the smooth recovery of U(VI) from aqueous solutions and its application in actual environments. Herein, the MP@LDH as an easy-to-recover and 3D macroscopic adsorbent for U(VI) extraction from aqueous solution was successfully prepared. The adsorbent was obtained via anchoring of LDH on the surface of melamine sponge (MS) coated with polydopamine (PDA). The maximum experimental adsorption capacity of MP@LDH sponge for U(VI) was as high as 559.8 mg g−1 (at pH = 8.0, T = 298 K). In the competitive sorption experiments against the competitions of Ba(II), Sr(II), Zn(II) and others ions, MP@LDH still exhibited a particularly excellent selectivity for U(VI) (almost 90% removal rate). Furthermore, the removal rate of MP@LDH towards U(VI) reached 88.18% under simulated seawater (C0 = 3.47 μg L−1). We believe that the MP@LDH with easy retrieval, excellent selectivity and uptake amount provides a convenient way for U(VI) extraction from seawater.

Enhanced properties of magnetic ultralight pear sponge assisted by Fenton-like reaction for oil-water separation

BackgroundOil spills and leaks of organic pollutants have caused threats to the aquatic environment. Biomass sponges are potential absorbent materials to achieve oil–water separation due to their being low-cost and environmentally friendly. However, the ability to separate oil and water still mainly depends on preparing low-density sponges with high absorbability and motion controllability through mild and low-cost strategies. MethodsIn this study, an ultralow-density biomass sponge was prepared via a facile hydrothermal method through a Fenton-like reaction using pears as raw material. Notably, a Fenton-like reaction was introduced for the fabrication of a hydrothermal process for performance optimization. In addition, a small amount of polydimethylsiloxane and magnetic nanoparticles were used to modify the surface of the pear sponge through a one-step method. FindingsThe prepared biomass sponge exhibited a novel recyclability, hydrophobicity with water contact angle of 137°, stable magnetic properties and ultra-low density(0.03 g/cm3). The pear sponge also demonstrated excellent sorption capacity, achieving up to 10-20 times of its own weight for a wide range of organic solvents and oils. The prepared magnetic-driven sponges can be applied in emergencies for leakages of organic solvents, as well as leakages from tankers and offshore drilling platforms.

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

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.