Changes In Water Contact Angle Research Articles

Biopolymer composites based on ultrasound/plasma‐modified fiber waste and polybutylene adipate terephthalate (PBAT): Physicochemical and functional performance

AbstractA strategy for a circular economy is to reuse and modify agricultural wastes through green methodologies, which can be employed as high‐value raw materials to produce sustainable materials. Thus, polybutylene adipate terephthalate (PBAT) composites containing plasma (P) and ultrasound/plasma (UP) modified Agave fibers (AF) were prepared by the melt mixing process. The effect of content (10% and 20%) and type of fiber on the processing, structural, mechanical, and water barrier performance of PBAT composites was assessed. FTIR analysis exhibited the presence of O‐Si‐O groups in all composites containing modified AF, indicating the presence of nanometric hexamethyldisiloxane (HMDSO) coating on the fiber surface. The addition of modified AF into PBAT polymer promoted higher torque levels and specific energy during the composites processing, indicating higher matrix‐fiber interactions that hindered the free flow of the polymeric chains. Nevertheless, SEM, DSC, and crystallinity results revealed that PBAT‐AFUP composites exhibited more homogeneous surfaces and ordered structures that promoted higher entanglement between modified fibers and the PBAT matrix and restricted the binding sites for water interaction as changes in tensile modulus (from 90 to 163 MPa) and water contact angle (from 63 to 77°) indicated. These findings show that modified Agave fibers are a sustainable raw material that can be easily processed to produce soft and hydrophobic PBAT‐based composites.Highlights The fiber type determined the functional performance of the PBAT composites The modified fibers increased the entanglement of composite chains UP‐modified fibers improved the water barrier performance of the PBAT matrix

Benefits of increasing surface to volume ratio for improving electrochemical performance of poly(3‐hexylthiophene): Electrospun fibers vs. films

AbstractWe report on successful preparation of conducting polymer nanofibers from regiorandom poly(3‐hexylthiophene). It is shown that the electrochemical properties of obtained structures are significantly improved in course of electrochemical doping process performed in the aqueous phase, moreover this process is accompanied with change of optical properties and water contact angle. These effects are not observed for polymer films. Moreover, doping of nanofibers results in pronounced, irreversible changes in the polymer structure – increased crystallinity due to incorporation of doping ions is confirmed by optical and X‐ray crystallographic studies. Ultimately, these changes lead to decreased resistance and improved electrochemical performance of nanofibers mat. As this effect is solely observed for nanofibers of conducting polymer, it can be ascribed to high surface to volume ratio of electrospun fibers mat. Therefore, it is shown for the first time that polythiophene electrochemical doping process effect is dependent on the format of the polymer applied, for nanofibers it can be regarded as attractive method of improving electrochemical properties of polymers.

Improving cellulose acetate mixed matrix membranes by incorporating hydrophilic MIL-101(Cr)-NH2 nanoparticles for treating dye/salt solution

Mixed matrix membranes were developed by incorporating hydrophilic MIL-101(Cr)–NH2 nanoparticles into a cellulose acetate (CA) matrix, resulting in enhanced hydrophilicity. By enhancing hydrophilicity, mixed matrix membranes were developed to counter the common issue of fouling that occurs when using membranes for the treatment of industrial wastewater. The mixed matrix membrane structures demonstrated impressive stability, with minimal change in water contact angle over a period of 30 days. The incorporation of MIL-101(Cr)–NH2 into the cellulose acetate membrane resulted in a reduction of the water contact angle from approximately 65.1˚ to 50.3˚, improving hydrophilicity. Even with just 1 wt% of MIL-101(Cr)–NH2 added to the cellulose acetate matrix, the pure water flux was significantly increased by 150 % to 68.1 ± 0.87 L/m2h, due to the enhanced hydrophilicity and larger pore size while maintaining a similar level of salt rejection. The prepared membranes exhibited high rejection (>97 %) of Methyl Blue dye through size exclusion mechanism. Additionally, the flux recovery ratio (FRR) improved significantly, increasing from approximately 54 % for the unmodified cellulose acetate membrane to 82 % for the mixed matrix membrane containing 0.2 wt% MIL-101(Cr)–NH2, demonstrating a significant improvement in the antifouling properties of the prepared membrane.

Multi-treatments based on polydimethylsiloxane and metal-organic framework wrapped with graphene oxide for achieving long-term corrosion and fouling protection: experimental and density functional theory aspects

In this study, ZIF-8 metal–organic framework decorated on surface of graphene oxide nanosheets and functionalized with silane moieties (F-GO@MOF) is employed to enhance the anti-corrosion, anti-bacterial, and anti-fouling properties of epoxy coatings modified with polydimethylsiloxane (epoxy-PDMS). The epoxy-PDMS/F-GO@MOF sample has revealed super-hydrophobic behavior with least water contact angle changes (Δθ ≈ 5° while Δθ ≈ 17° is recorded for epoxy-PDMS sample) during 20 days of immersion, twice pull-off adhesion strength (6.8 MPa compared to 3.7 MPa for epoxy-PDMS coating), and significantly higher impedance modulus (8.82 × 108 Ω·cm2 which is 3 times more than the epoxy-PDMS sample) during 60 days of immersion in NaCl electrolyte. The anti-bacterial test against Pseudomonas sp. and anti-fouling monitoring in Qingdao port have shown that fewer bacteria and marine organisms are attached on the epoxy-PDMS/F-GO@MOF coating, respectively, indicating advanced fouling and bacterial resistance of the nanocomposite sample. Based on the theoretical studies by density functional theory (DFT) method, the binding of the components in the GO@MOF complex is notably large which could inhibit the penetration of corrosive agents toward the steel substrate. In addition, the stabilization of the GO@MOF nanohybrid is mainly controlled through van der Waals (vdW) forces.

Corrosion inhibition effect of 1-phenyl-5-mercaptotetrazole on nickel-aluminum bronze in seawater: A combined experimental and theoretical study

A combined experimental and theoretical study was performed on corrosion inhibition effect of 1-Phenyl-5-mercaptotetrazole (PMT) on nickel-aluminum bronze (NAB) in seawater. Gravimetric measurement and electrochemical method, such as the open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), Tafel polarization curve were used to verify the corrosion inhibition effect of PMT. It was found that the corrosion inhibition efficiency (IE) of PMT achieved 94.4 %, 99.5 %, 98.7 % at a concentration of 1.12 mM, respectively. The slump of the degree of corrosion on NAB surface was also revealed based on SEM and AFM images analysis with the addition of PMT. According to the Langmuir isotherm model based on EIS, PMT was confirmed as a mixed-type corrosion inhibitor between −20 kJ mol–1 and −40 kJ mol–1. Besides, the successful adsorption of PMT on NAB has been revealed by the results of XPS and the change of water contact angle on NAB surface. In combination XPS with quantum chemistry calculations, PMT molecules are adsorbed on the surface of NAB by the active S atom and the tetrazole ring as the major adsorption groups, thus, the protective barrier formed by PMT on the surface of NAB can effectively insulate NAB from contact with seawater. The research results in this paper have showed that PMT as a drug intermediate has an excellent corrosion inhibition effect on the NAB at extremely low concentration in seawater.

The Effects of Solvent on Superhydrophobic Polyurethane Coating Incorporated with Hydrophilic SiO2 Nanoparticles as Antifouling Paint

Polyurethane (PU) paint with a hydrophobic surface can be easily fouled. In this study, hydrophilic silica nanoparticles and hydrophobic silane were used to modify the surface hydrophobicity that affects the fouling properties of PU paint. Blending silica nanoparticles followed by silane modification only resulted in a slight change in surface morphology and water contact angle. However, the fouling test using kaolinite slurry containing dye showed discouraging results when perfluorooctyltriethoxy silane was used to modify the PU coating blended with silica. The fouled area of this coating increased to 98.80%, compared to the unmodified PU coating, with a fouled area of 30.42%. Although the PU coating blended with silica nanoparticles did not show a significant change in surface morphology and water contact angle without silane modification, the fouled area was reduced to 3.37%. Surface chemistry could be the significant factor that affects the antifouling properties of PU coating. PU coatings were also coated with silica nanoparticles dispersed in different solvents using the dual-layer coating method. The surface roughness was significantly improved by spray-coated silica nanoparticles on PU coatings. The ethanol solvent increased the surface hydrophilicity significantly, and a water contact angle of 18.04° was attained. Both tetrahydrofuran (THF) and paint thinner allowed the adhesion of silica nanoparticles on PU coatings sufficiently, but the excellent solubility of PU in THF caused the embedment of silica nanoparticles. The surface roughness of the PU coating modified using silica nanoparticles in THF was lower than the PU coating modified using silica nanoparticles in paint thinner. The latter coating not only attained a superhydrophobic surface with a water contact angle of 152.71°, but also achieved an antifouling surface with a fouled area as low as 0.06%.

Effect of ultrasound-assisted cold plasma pretreatment on cell wall polysaccharides distribution and extraction of phenolic compounds from hyssop (Hyssopus officinalis L.)

Hyssopus officinalis L (Hyssop) is a good source of phenolic compounds. However, conventional methods for extraction of these compounds typically take a long time and have relatively low recovery rates. This study focused on cold atmospheric plasma (CAP) pretreatment and investigated its effects on the ultrasound-assisted extraction (UAE) of phenolic compounds from hyssop. Hyssop was treated at dielectric barrier discharge plasma with air and nitrogen gases for 5, 10, and 15 min. Optical emission spectroscopy was used to evaluate present active species in the plasma. The water contact angle changes, cell wall polysaccharides distribution, and structural variations of the treated samples were determined after treatment. Antioxidant activity and total phenolic contents (TPC) of the extracts were also evaluated. The results showed that CAP treatment reduced the contact angle making surface more hydrophilic. Compared with hyssop, overall no significant changes in the basic structure of all treated samples or the formation of new functional groups were recognized. In addition, CAP pretreatment before UAE increased the antioxidant activity of extracts according to the FRAP assay than the un-pretreated sample and conventional solvent extraction method. Also, TPC increased in samples treated with nitrogen plasma.

Surface Treatment of Aluminum Oxide Using Atomic Hydrogen Generated by Catalytic Reaction on Heated Tungsten

A surface treatment using atomic hydrogen annealing (AHA) of aluminum oxide (alumina, Al2O3) has been investigated. In AHA, high-density atomic hydrogen is generated on a heated tungsten surface by catalytic cracking reaction. Sintered alumina and thermal sprayed alumina coating surfaces were subjected to AHA. The different behavior in the decrement of carbon and OH groups observed by X-ray photoelectron spectroscopy on the surface of AHA-treated sintered alumina and sprayed alumina was assumed to affect the observed different behavior in the changes of water contact angle by AHA. The difference is thought to be attributed to the different crystal structure of alumina. The chemical reactions of atomic hydrogen with carbon contamination, hydroxyl groups, and adsorbed H2O molecules were also discussed.

Durable and regenerative superhydrophobic surface using porous nanochannels

Despite substantial advancements in development of artificially engineered superhydrophobic surfaces, durability and regenerative aspect of such surfaces remain elusive. Harsh working condition, especially extreme exposure to water or humidity deteriorates plastron property of superhydrophobic surfaces rendering them inappropriate for prolonged under-water applications. We report a systematic approach for creating a durable superhydrophobic surface by first plasma-treating a fabricated porous nanochannel geometry on a silicon substrate followed by infusion-depletion of silicon oil and coating a layer of carbon derived from candle soot. The surface is capable of maintaining water contact angle (WCA) of nearly 160° and roll off angle (ROA) less than 5° after undergoing 20 different tests including mechanical (tap water jet up to 10.3ms-1, tape peeling test up to 12 cycles), chemical (saline and solvents immersion), thermal (high temperature exposure and condensation heat transfer), self-cleaning tests, organic compatibility (honey, soy sauce, chocolate syrup, all-purpose flour) and superoleophilic test, thus exhibiting potential real-world applications. The surface retains stable plastron with negligible change in WCA and ROA even after being under 10cm of water for 30 days, similar to respiration plastrons seen on some aquatic insects. Regenerative capability of the surface is demonstrated by restoring its superhydrophobicity from a forced degraded state.

Long-Term In Vitro Assessment of Biodegradable Radiopaque Composites for Fiducial Marker Fabrication.

Biodegradable polymer-based composite materials may be successfully utilised to fabricate fiducial markers (FMs), which are intended to precisely label tumour margins during image-guided surgery or radiotherapy. However, due to matrix degradability, the stability of the functional properties of FMs depends on the chosen polymer. Thus, this study aimed to investigate novel radiopaque composites which varied in the polymeric matrix-polycaprolactone (PCL), poly(L-lactide-co-caprolactone) (P[LAcoCL]) with two molar ratios (70:30 and 85:15), and poly(L-lactide-co-glycolide) (with molar ratio 82:18). The radiopaque component of the materials was a mixture of barium sulphate and hydroxyapatite. The changes in water contact angle, stiffness, and radiopacity occurring during the 24-week-long degradation experiment were examined for the first time. This study comprehensively analyses the microstructural causes of composites behaviour within degradation experiments using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), gel permitted chromatography (GPC), and scanning electron microscopy (SEM). The obtained results suggest that the utilized biodegradable matrix plays an essential role in radiopaque composite properties and stability thereof. This long-term in vitro assessment enabled a comparison of the materials and aided in choosing the most favourable composite for FMs' fabrication.

Polyethylene with MoS2 nanoparticles toward antibacterial active packaging

AbstractMolybdenum disulfide (MoS2) nanoparticles, obtained from liquid phase exfoliation in the presence of chitosan, were melt mixed with a linear low‐density polyethylene (LLDPE) matrix to produce novel antimicrobial active packaging materials. The LLDPE/MoS2 composites presented exfoliated nanoparticles forming aggregates that are well dispersed in the polymer matrix. These 2D‐layered MoS2 nanoparticles at concentrations of 0.5, 1.0, and 3.0 wt% rendered several functionalities to the LLDPE, as for example an antimicrobial behavior against Salmonella typhi and Listeria monocytogenes bacteria that can be explained not only by the photoactivity of the filler but also by changes in the composite surface. For instance, the composites presented a reduction in the water contact angle (i.e., an increased hydrophilicity) and relevant changes in the surface topography (i.e., reduced roughness) as compared with pure LLDPE. Regarding the barrier properties, while MoS2 dramatically increased the water vapor permeation (WVP) of the polymer matrix, until 15 times for composite with 3.0 wt% of filler, the oxygen permeation decreased around 25%. All these novel functionalities in the nanocomposites were obtained without significantly affecting the tensile mechanical properties of the pure LLDPE matrix. These results show that MoS2 is a promising filler for the development of antibacterial active packaging films with behaviors as similar as other 2D‐layered fillers such as graphene derivatives.

Construction of a stable and superhydrophilic PHMG/TA/Fe(III) composite coating-modified membrane for for oil–water separation

Polyvinylidene fluoride (PVDF)/polyhexamethylene guanidine (PHMG)/tannic acid (TA) coatings have some degree of hydrophilicity but lack stability. To improve the hydrophilicity and stability of antimicrobial PVDF/PHMG/TA membranes, Fe(III) is introduced into the composite system. As a weakly acidic hydrophilic nanoion, Fe(III) can enhance the hydrophilicity and resistance to contamination of the membranes. Furthermore, the stability can be enhanced because a three-dimensional cross-linked coating structure is formed by the complexation of Fe(III), TA and PHMG. This work investigates the effects of different tannic acid concentrations and pH conditions on the hydrophilicity, anti-pollution and stability of the modified coatings. The surface morphology of the membranes was analyzed by field-emission scanning electron microscopy. Additionally, the hydrophilicity and the antipollution performance were evaluated based on the water contact angle, submerged oil contact angle, emulsion flux and flux recovery rate. The stability was evaluated by the changes in flux recovery rate and water contact angle before and after emulsion scouring and ultrasonic treatment. The results show that the modified membranes have favorable hydrophilicity and stability after the addition of Fe(III). The water contact angle can be reduced to 19°, the pure water flux can reach 13,850 L·m−2·h−1, and the emulsion flux can reach 2650 L·m−2·h−1. Moreover, 99.68% flux recovery was achieved after 7 days of deionized water flushing, and the water contact angle remained almost unchanged.

Preparation of Waterproof and Breathable Polyethylene (PE) Film Through One-Step Plasma Treatment

The waterproof and breathable multifunctional films have been widely used in advanced wear protection, medical treatment, monitoring, and the aerospace industry. In this research, we prepared a new class/kind of waterproof and breathable intelligent (WBI) films through plasma surface treatment, which can be applied in the health care field. After air plasma treatments, the structural properties of polyethylene (PE) film were observed by Scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), Thermogravimetry (TG), and Differential scanning calorimetry (DSC). It was found that plasma treatment etches PE fibers due to the sputter etching effect of plasma modification, leading to a crystallinity decrease. In addition, the changes in water contact angle, air permeability, and water vapor transmission rate of PE films were measured to illustrate their waterproof and breathable properties. After plasma treatment, the water contact angle of PE film reduced from 112.67∘ to 45∘, indicating the PE surface converted from hydrophobic into hydrophilic. The air permeability increased to 0.450[Formula: see text]mm/s and the water vapor transmission rate increased to 1419.788[Formula: see text]g/m[Formula: see text], which means the treated PE films are breathable but not permeable to liquid water. The improved performance in waterproof and breathability expands the application of PE film in the pharmaceutical field.

Superhydrophilic surface modification of fabric via coating with cysteic acid mineral oxide

HypothesisCysteic acid functionalized mineral oxide nanoparticles can be used to impart superhydrophilic performance on a range of woven and non-woven fabrics. ExperimentsWoven and non-woven fabrics spray and dip coated alumina and iron oxide based cysteic acid functionalized mineral oxide nanoparticles, were characterized by SEM, EDX and the change in water contact angle was measured or where the increased hydrophilicity was sufficiently great that the time for the adsorption of the water droplet was measured. FindingsFabrics showed a remarkable increase in the hydrophilicity upon coating with cysteic acid functionalized mineral oxide nanoparticles, although alumina-based materials performed better than the iron oxide homologs. Untreated spunlace polypropylene (contact angle = 147.5°) shows the greatest change after CAMO treatment to a water absorption time of 15 ms.

Modification of Wool Fibers via Base/Cationic Detergent Pretreatment and Transglutaminase-mediated Reaction of Keratin

ABSTRACT The surface modification of wool fibers is an important part of the textile industry to add functionality and stability to wool products. In this study, we developed a process utilizing a base/cationic surfactant solution pretreatment followed by an enzyme-mediated keratin crosslinking reaction to modify the wool fibers. Changes in water contact angle demonstrated the successful transformation of the hydrophobic wool surface to a more hydrophilic one after soaking in sodium carbonate solution containing hexadecyltrimethylammonium bromide (CTAB). The treated fabrics were further characterized by colorimetry and fluorescent spectrometry. Results showed that the pretreatment increased the yellowness of fabrics and caused some structural changes among certain amino acids, such as tryptophan and cystine. Keratin extracted from coarse wool fibers was further applied on pretreated fabrics through a microbial transglutaminase (mTGase) mediated reaction under mild conditions. Morphological characterization via SEM demonstrated the effective coverage of keratin on the scales of wool. The current method may provide an alternative processing protocol to modify wool fibers and improve the quality and performance of wool products.

Capturing Methomyl Droplet by Calix[4]arene Modified Surface

AbstractSelective recognition of carbamate pesticides on a superhydrophobic surface by the phenomenon of droplet rolling is a challenging topic. Here, the alkynyl‐calix[4]arene (AYC4) was synthesized, then self‐assembled on Si‐N3 modified silicon surface (AYC4‐SAMs) for rapid detection of methomyl. The AYC4‐SAMs exhibited high selectivity/sensitivity towards methomyl via visual water contact angle change with promising reusability, which is potential application for the identification and detection of pesticides.

Laser Processing of Polymer Films Fabricated from PHAs Differing in Their Monomer Composition.

The study reports results of using a CO2-laser in continuous wave (3 W; 2 m/s) and quasi-pulsed (13.5 W; 1 m/s) modes to treat films prepared by solvent casting technique from four types of polyhydroxyalkanoates (PHAs), namely poly-3-hydroxybutyrate and three copolymers of 3-hydroxybutyrate: with 4-hydroxybutyrate, 3-hydroxyvalerate, and 3-hydroxyhexanoate (each second monomer constituting about 30 mol.%). The PHAs differed in their thermal and molecular weight properties and degree of crystallinity. Pristine films differed in porosity, hydrophilicity, and roughness parameters. The two modes of laser treatment altered these parameters and biocompatibility in diverse ways. Films of P(3HB) had water contact angle and surface energy of 92° and 30.8 mN/m, respectively, and average roughness of 144 nm. The water contact angle of copolymer films decreased to 80–56° and surface energy and roughness increased to 41–57 mN/m and 172–290 nm, respectively. Treatment in either mode resulted in different modifications of the films, depending on their composition and irradiation mode. Laser-treated P(3HB) films exhibited a decrease in water contact angle, which was more considerable after the treatment in the quasi-pulsed mode. Roughness parameters were changed by the treatment in both modes. Continuous wave line-by-line irradiation caused formation of sintered grooves on the film surface, which exhibited some change in water contact angle (76–80°) and reduced roughness parameters (to 40–45 mN/m) for most films. Treatment in the quasi-pulsed raster mode resulted in the formation of pits with no pronounced sintered regions on the film surface, a more considerably decreased water contact angle (to 67–76°), and increased roughness of most specimens. Colorimetric assay for assessing cell metabolic activity (MTT) in NIH 3T3 mouse fibroblast culture showed that the number of fibroblasts on the films treated in the continuous wave mode was somewhat lower; treatment in quasi-pulsed radiation mode caused an increase in the number of viable cells by a factor of 1.26 to 1.76, depending on PHA composition. This is an important result, offering an opportunity of targeted surface modification of PHA products aimed at preventing or facilitating cell attachment.

Optically Guided Pyroelectric Manipulation of Water Droplet on a Superhydrophobic Surface.

Controlled droplet manipulation by light has tremendous technological potential. We report here a method based on photothermally induced pyroelectric effects that enables manipulation and maneuvering of a water droplet on a superhydrophobic surface fabricated on lithium tantalite (LiTaO3). In particular, we demonstrate that the pyroelectric charge distribution has an essential role in this process. Evenly distributed charges promote a rapid hydrophobic to hydrophilic transition featuring a very large water contact angle (WCA) change of ∼76.5° in air. This process becomes fully reversible in silicone oil. In contrast, the localized charge distribution induced by guided laser illumination leads to very different and versatile functionalities, including droplet shape control and motion manipulation. The influence of a saline solution is also investigated and compared to the deionized water droplet. The focusing effect of the water droplet, a phenomenon that widely exists in nature, is particularly of interest. Simple tuning of the laser incident angle results in droplet deformation, jetting, splitting, and guided motion. Potential applications, such as droplet pinning and transfer, are presented. This approach offers a wide range of versatile functionalities and ready controllability, including contactless, electrodeless, and precise spatial and fast temporal control, with tremendous potential for applications requiring remote droplet control.

Preparation and study of stable fluorine‐free superhydrophobicity of cotton fibers

AbstractThis paper proposes a method of directly modifying the surface of cotton fiber to achieve super‐hydrophobic properties. The process was directly utilized the long‐chain alkyl siloxane and the nano‐SiO2 modified cotton cloth, which was simple to operate, low in cost and environmentally friendly. This study discussed the influence of solvent ratio, reactant content and ammonia content on hydrophobicity. The solvent ratio had the greatest influence, and the maximum water contact angle (CA) changes were70° ± 1°. The maximum water CA of the superhydrophobic cotton fabric prepared after process selection was 162 ± 1.5°; it had good acid, alkali and salt resistance. After 24 h in a solution with a pH of 1–14, CA remained almost unchanged; After 144 h in a 3.5% salt solution, CA stabilized above 132°; it had self‐cleaning properties; it had good selective adsorption performance, which can quickly separate oil and water; it had good mechanical stability. After 300 times abrasion of sandpaper, which still shows hydrophobic properties.

Development of hybrid hydrophobic molybdenum disulfide (MoS2) nanoparticles for super water repellent self-cleaning

In this work, we developed hybrid hydrophobic nanoparticles using the 2D nanosheet molybdenum disulfide (MoS2). First, the MoS2 was exfoliated and was used to synthesize a Mos2 intermediate. Then, functional groups of the MoS2 intermediate were reacted with polysilsesquioxane (POSS) and trichloro(1H,1H,2H,2H-perfluorooctyl)silane to improve the hydrophobicity of the coating material. The resulting material showed good electrical resistance and good UV-degradation resistance. The cross-sections, shapes, and particle sizes of the nanoparticles were observed after and before the exfoliation and hydrophobization processes, and the adhesion, mechanical strength, and surface roughness of the MoS2 particles were determined. The hybrid hydrophobic MoS2-base nanocoating material was coated on the surface of a SR insulator and PE insulating cover by a spray coating method to measure the change in water contact angle to analyze the superhydrophobic behavior. In addition, the self-cleaning function was showed by changing the receding contact angle of the surface. The receding contact angle values of the pristine surfaces were 71° (insulating cover) and 81° (insulator), but these increased significantly to 137° to 140°, respectively, and superhydrophobic self-cleaning was observed on the MoS2 nanoparticle coated surfaces.