Teflon Sheet Research Articles

Bubble Movement on Inclined Hydrophobic Surfaces.

The movement of a single air bubble on an inclined hydrophobic surface submerged in water, including both the upward- and downward-facing sides of the surface, was investigated. A planar Teflon sheet with an apparent contact angle of a sessile water droplet of 106° was used as a hydrophobic surface. The volume of a bubble and the inclination angle of a Teflon sheet varied in the ranges 5-40 μL and 0-45°, respectively. The effects of the bubble volume on the adhesion and dynamics of the bubble were studied experimentally on the facing-up and facing-down surfaces of the submerged hydrophobic Teflon sheet, respectively, and compared. The result shows that the sliding angle has an inverse relationship with the bubble volume for both the upward- and downward-facing surfaces. However, at the same given volume, the bubble on the downward-facing surface spreads over a larger area of the hydrophobic surface than the upward-facing surface due to the greater hydrostatic pressure acting on the bubble on the downward-facing surface. This makes the lateral adhesion force of the bubble greater and requires a larger inclination angle to result in sliding.

Drastic Improvement in Adhesion Property of Polytetrafluoroethylene (PTFE) via Heat-Assisted Plasma Treatment Using a Heater

The heating effect on the adhesion property of plasma-treated polytetrafluoroethylene (PTFE) was examined. For this purpose, a PTFE sheet was plasma-treated at atmospheric pressure while heating using a halogen heater. When plasma-treated at 8.3 W/cm2 without using the heater (Low-P), the surface temperature of Low-P was about 95 °C. In contrast, when plasma-treated at 8.3 W/cm2 while using the heater (Low-P+Heater), the surface temperature of Low-P+Heater was controlled to about 260 °C. Thermal compression of the plasma-treated PTFE with or without heating and isobutylene−isoprene rubber (IIR) was performed, and the adhesion strength of the IIR/PTFE assembly was measured via the T-peel test. The adhesion strengths of Low-P and Low-P+Heater were 0.12 and 2.3 N/mm, respectively. Cohesion failure of IIR occurred during the T-peel test because of its extremely high adhesion property. The surfaces of the plasma-treated PTFE with or without heating were investigated by the measurements of electron spin resonance, X-ray photoelectron spectroscopy, nanoindentation, scanning electron microscopy, and scanning probe microscopy. These results indicated that heating during plasma treatment promotes the etching of the weak boundary layer (WBL) of PTFE, resulting in a sharp increase in the adhesion property of PTFE.

Experimental and theoretical investigation on the role of friction in Nakazima testing

The Nakazima test is a commonly used method to experimentally measure the forming limit curve (FLC) of sheet metal. Various researchers have different opinions about the effect of tribological conditions at the interface of the punch and specimen in Nakazima testing, such that international industry test standards specify conflicting requirements to address friction conditions during testing. This paper provides analysis to resolve this conflict and demonstrates the effectiveness of an analytical procedure to account for and eliminate effects of friction in determination of the strain FLC as a material property that is independent of friction. With the aid of digital image correlation (DIC) techniques, Nakazima tests of a dual phase steel (DP980) were performed under two clearly different friction conditions: (1) friction was minimized between the punch and the specimen by conducting tests using a thin Teflon sheet, and (2) friction was maximized by conducting tests without any lubricant after chemically cleaning the punch and sheet surfaces. As expected, the strain FLCs obtained under these two friction conditions are different. However, analysis shows that the strain path at material points within the same test specimen are the same for both friction conditions. The only difference observed is that the relative strain rates at different material points are strongly affected by friction, which causes necking and fracture to initiate at different locations on test specimens. Furthermore, by accounting for the effects of local strain path, curvature, and contact pressure on the measured strain history at the location of necking using the method described by Min et al. [27], the corrected strain FLCs obtained under very low and very high friction conditions are shown to be indistinguishable.

Temperature Effect on Performance of Triboelectric Nanogenerator

The triboelectric nanogenerator (TENG) is a promising energy harvesting technology that can convert mechanical energy into electricity and can be used as self‐powered active sensors. However, previous studies are mostly carried out at room temperature without considering the temperature effect on the electrical performance of TENGs, which is critical for the application of electronics powered by TENGs in different regions in the world. In the present work, a TENG that worked in the single‐electrode and contact‐separation mode is utilized to reveal the influence of environment temperature on the electrical performance of TENG. The electrical performance of the TENG shows a decreasing tendency, as the temperature rises from −20 to 150 °C, which is controlled by the temperature‐induced changes in the ability of storing and gaining electrons for polytetrafluoroethylene (PTFE). The storing electron ability change of PTFE is attributed to two aspects: one is the reduction of relative permittivity of PTFE sheet as the temperature increases, and the other is the variations of effective defects such as the escape of trapped charges in shallow traps and surface oxidation under the effect of temperature perturbation. This work can provide useful information for the application of TENG in both electric power generation and self‐powered sensors in the harsh environment.

A Three-Layer Microstrip Resonator for Complex Permittivity Measurement of Medium Loss Liquids Using 3D-FDTD Simulation

A three-layer microstrip resonator is introduced to measure complex permittivities of mediumloss liquids. The device is configured such that the first layer containing the liquid under test; a sheet ofpolytetrafluoroethylene (PTFE) is embedded in the middle layer, and the third layer functions as the baseon which the patch is printed. The base layer is inverted on PTFE layer, and reflection coefficient ismeasured from 2.5 GHz to 5 GHz. The complex permittivities are extracted from the resonant frequencyand the 10-dB bandwidth of S-parameter for different combinations of ethanol and methanol. Indeed,a three-layer microstrip resonator allows us to possess an affordable, and yet, high-accuracy electricaldevice to measure complex permittivities of medium loss liquids. FDTD method is used for analysingthe structure and the results obtained by using FDTD method and the experimental data indicate a highdegree of similarity.

Performance of PVDF flat membranes and hollow fibers in desalination by direct contact membrane distillation at high temperatures

Abstract Numerous studies have been conducted on desalination by direct contact membrane distillation (DCMD) through microporous hydrophobic membranes. The hot brine temperature in such studies is usually in the range of 40–90 °C. In steam assisted gravity drainage (SAGD) process, the brine obtained as the produced water however comes out at a high temperature of as much as 160 °C + . Reverse osmosis desalination can be employed only after such a brine is cooled down substantially. Two studies were conducted on DCMD-based desalination of such brines at a brine temperature up to 130 °C using flat sheet and hollow fiber membranes of polytetrafluoroethylene (PTFE). This investigation is focused on similar desalination studies with high temperature brines using much less expensive microporous hydrophobic membranes of polyvinylidene fluoride (PVDF). One flat sheet membrane and two different hollow fiber membranes of PVDF were employed with 1% salt-containing solution as the feed over a temperature range of 80–125 °C. The flat sheet membrane and one hollow fiber membrane-based module achieved desalination without any salt leakage. The value of the water vapor flux achieved through the flat sheet membrane of 0.1 μm pore size was very high around 270 kg/m2-h at 124 °C. Since the brine is at above-atmospheric pressure (2–3 atm), much larger pore sizes or any defects in the membrane will lead to salt leakage.

Nearly Perfect Durable Superhydrophobic Surfaces Fabricated by a Simple One-Step Plasma Treatment

Fabrication of superhydrophobic surfaces is an area of great interest because it can be applicable to various engineering fields. A simple, safe and inexpensive fabrication process is required to fabricate applicable superhydrophobic surfaces. In this study, we developed a facile fabrication method of nearly perfect superhydrophobic surfaces through plasma treatment with argon and oxygen gases. A polytetrafluoroethylene (PTFE) sheet was selected as a substrate material. We optimized the fabrication parameters to produce superhydrophobic surfaces of superior performance using the Taguchi method. The contact angle of the pristine PTFE surface is approximately 111.0° ± 2.4°, with a sliding angle of 12.3° ± 6.4°. After the plasma treatment, nano-sized spherical tips, which looked like crown-structures, were created. This PTFE sheet exhibits the maximum contact angle of 178.9°, with a sliding angle less than 1°. As a result, this superhydrophobic surface requires a small external force to detach water droplets dripped on the surface. The contact angle of the fabricated superhydrophobic surface is almost retained, even after performing an air-aging test for 80 days and a droplet impacting test for 6 h. This fabrication method can provide superb superhydrophobic surface using simple one-step plasma etching.

Geometrical and boundary condition effects on restrained shrinkage behavior of UHPFRC slabs

Six large Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC) slabs were fabricated and tested to investigate the restrained shrinkage and cracking behaviors. The use of expanded polystyrene and Teflon sheets with two different slab thicknesses was considered to improve the shrinkage crack resistance. Free shrinkage was simultaneously measured to evaluate the degree of restraint according to the above test parameters. The test results showed that free shrinkage strains of –689 με to –723 με were obtained after 9 days, and prismatic specimens with a higher exposed surface area-to-volume ratio (S/V) had slightly higher free shrinkage strains than those with a lower S/V. Increasing the concrete slab thickness and using expanded polystyrene and Teflon sheets were effective at reducing the degree of restraint and improving the shrinkage crack resistance of the UHPFRC slabs. Among the various specimens, the slabs with the expanded polystyrene exhibited the lowest degree of restraint by 0.45 after 9 days.

Experimental studies of floor slip tests on soil blocks reinforced by brittle shear pins

Massive slope failures in open pit mines are essential issues for mining projects because they can cause the loss of lives, damage to machineries and the delay of works. To understand the effect of shear pins on slope stabilisation, the aim of this paper is to employ experimental models to investigate the stability and failure mechanisms of the floor slip resistance of soil blocks that are reinforced by brittle shear pins and rest on a low-interface friction plane. The soil blocks were made of humid silica sand No. 6 and placed on a Teflon sheet. Pencil leads, 2 mm in diameter, were used as the brittle shear pins and installed perpendicularly to the bedding plane. A series of tests were carried out for the floor slip resistance of the soil blocks with shear pins by gradually tilting the models until failure was observed. Parametric studies were performed by varying the number of shear pins, the shear pin installation, and the soil block thickness. The experimental studies revealed that these parameters have a significant influence on the stability and the failure mechanisms. Three different failure mechanisms were observed in this study, namely, slip failure, punching failure and detachment failure.

Numerical simulation of concrete slabs strengthened with PTFE sheets subjected to blast load

Due to the noticeable increase in bombing activities, the understanding of the structures response against blast loads has become one of the major concerns in structural engineering. This present study investigates the blast loading hazards that can take place in concrete slabs. Concrete slabs strengthened using PolyTetraFluoroEthylene (PTFE) are used to investigate the control of the hazards. The thickness of the slabs is 200 mm. The models are exposed to a blast load equivalent to 20 Kg of TNT explosives with a standoff distance equals to 500 mm. The concrete slabs are strengthened using different thicknesses and different number of sheets. In order to investigate the effect of PTFE sheets, AUTODYN software is used to create the numerical models. Concrete is modelled using Lagrange solver while the air and TNT explosives are modelled using Euler solver. The results of the study show that PTFE sheets control concrete fragmentation and debris propagation. The use of PTFE can improve concrete resistance to one of the blast components because of its stability at high temperatures, thermal insulation, and resistance to weathering. PTFE has a wide working temperature range from −100°F to +400°F (−73°C to 204°C) in which its properties remain functional.

An Innovative Modified Orbital Implant in Enucleated Eyes for Postoperative Functionality and Cosmesis

ABSTRACT Orbital implants replace the volume lost by enucleated eye, impart motility to the prosthesis, and maintain cosmetic symmetry with the fellow eye. They include nonintegrated, synthetic semi-integrated, integrated, bio-integrated, and biogenic varieties. The much favored hydroxyapatite (bio-integrated) implant, due to its rough surface, needs to be wrapped in donor sclera or other wrapping materials (like polyglactin-910 mesh, polytetrafluoroethylene sheet, etc.) to which the muscles could be directly sutured. Cost factor of such wrappings is often prohibitive that add to the expense of such implants. Purpose To highlight monofilament polypropylene surgical mesh commonly used for herniorrhaphy as an alternative implant wrapping for achieving augmented implant volume and enabling easier extraocular muscle attachment in postenucleation reconstruction of artificial eye. Materials and methods Following enucleation of a nonfunctional eye in a patient who met with a road traffic accident, a 14 mm hydroxyapatite ball was used to replace the globe. The ball was wrapped with a monofilament polypropylene surgical mesh used in herniorrhaphy and sutured. The patient achieved a satisfactory cosmesis and movements of the implant for different gazes. No ocular discomfort or implant extrusion was reported following 6 months of follow-up. Conclusion Monofilament polypropylene mesh can be used safely as an orbital implant wrapping, economizing the implant cost. How to cite this article Sinha S, Rizvi Y, Dokania A. An Innovative Modified Orbital Implant in Enucleated Eyes for Postoperative Functionality and Cosmesis. Int J Adv Integ Med Sci 2017;2(1):47-50.

Comparison of fasica lata and prolene suture in frontalis suspension surgery: frontalis muscle suspension

Objectives The aim of the study was to compare prolene suture, polytetrafluoroethylene sheet, and fascia lata for frontalis suspension surgery in the treatment of congenital ptosis with poor levator function. Background Eyelid frontalis suspension surgery is a common operative procedure used to correct severe blepharoptosis in eyes with poor levator muscle function. The main indication for frontalis suspension surgery is severe blepharoptosis secondary to myogenic, neurogenic, mechanical, and traumatic disorders. Patients and methods Eyelids were divided into three groups. In group I (20 eyelids), the upper-eyelid tarsus was suspended to the frontalis muscle using autogenous fascia lata. In group II (20 eyelids), the upper-eyelid tarsus was suspended to the frontalis muscle using a ribbon of 0.3 mm Gore-tex sheet. In group III (20 eyelids), the upper-eyelid tarsus was suspended to the frontalis muscle using prolene suture. Follow-up of eyelid level and reporting of postoperative complications and incidence of recurrence were done. Results At 12 months postoperatively (end of the follow-up period), there was no statistically significant difference between group I and group II regarding eyelid level. Fascia lata-related complications were detected in three eyelids of group I. Gore-tex-related complications were detected in five eyelids of group II. Prolene-related complications were detected in eight eyelids of group III. There was no statistically significant difference in complications between the three groups. The recurrence rate was 5% (one of 20 eyelids) in group I, 10% (two of 20 eyelids) in group II, and 40% (eight of 20 eyelids) in group III. The difference in recurrence rates was statistically nonsignificant. Conclusion Fascia lata is a good sling material, followed by Gore-tex sheet. Prolene suture has many complications and is associated with a high rate of recurrence.

A design principle of polymers processable into 2D homeotropic order.

How to orient polymers homeotropically in thin films has been a long-standing issue in polymer science because polymers intrinsically prefer to lie down. Here we provide a design principle for polymers that are processable into a 2D homeotropic order. The key to this achievement was a recognition that cylindrical polymers can be designed to possess oppositely directed local dipoles in their cross-section, which possibly force polymers to tightly connect bilaterally, affording a 2D rectangular assembly. With a physical assistance of the surface grooves on Teflon sheets that sandwich polymer samples, homeotropic ordering is likely nucleated and gradually propagates upon hot-pressing towards the interior of the film. Consequently, the 2D rectangular lattice is constructed such that its b axis (side chains) aligns along the surface grooves, while its c axis (polymer backbone) aligns homeotropically on a Teflon sheet. This finding paves the way to molecularly engineered 2D polymers with anomalous functions.

Experimental and numerical investigation of liquid jet impingement on superhydrophobic and hydrophobic convex surfaces

Experiments and numerical simulations were carried out to examine the vertical impingement a round liquid jet on the edges of horizontal convex surfaces that were either superhydrophobic or hydrophobic. The experiments examine the effects on the flow behaviour of curvature, wettability, inertia of the jet, and the impingement rate. Three copper pipes with outer diameters of 15, 22, and 35 mm were investigated. The pipes were wrapped with a piece of a Brassica oleracea leaf or a smooth Teflon sheet, which have apparent contact angles of 160° and 113°. The Reynolds number ranged from 1000 to 4500, and the impingement rates of the liquid jets were varied. Numerical results show good agreement with the experimental results for explaining flow and provide detailed information about the impingement on the surfaces. The liquid jet reflected off the superhydrophobic surfaces for all conditions. However, the jet reflected or deflected off the hydrophobic surface, depending on the inertia of the jet, the curvature of the surface, and the impingement rate. The results suggest that pressure is not the main reason for the bending of the jet around the curved hydrophobic surface.

Influence of standard RF coil materials on surface and buildup dose from a 6 MV photon beam in magnetic field.

Magnetic resonance guided teletherapy systems aspire to image the patient concurrently with the radiation delivery. Thus, the radiofrequency (RF) coils used for magnetic resonance imaging, placed on or close to patient skin and in close proximity to the treatment volume, would be irradiated leading to modifications of radiation dose to the skin and in the buildup region. The purpose of this work is to measure and assess these dose modifications due to standard off-the-shelf RF coil materials. A typical surface coil was approximated as layered sheets of polycarbonate, copper tape, and Teflon to emulate the base, conductor, and cover, respectively. A separate investigation used additional coil materials, such as copper pipe, plastic coil housing, a typical coil padding material, and a thin copper conductor. The materials were placed in the path of a 6 MV photon beam at various distances from polystyrene phantoms in which the surface and buildup doses were measured. The experiments were performed on a clinical Varian linac with no magnetic field and with a 0.21 T electromagnet producing a magnetic field parallel to the beam central axis. The authors repeated similar experiments in the presence of a 0.22 T magnetic field oriented perpendicular to the beam central axis using an earlier linac-MR prototype, with a biplanar permanent magnet. The radiation detectors used for the measurements were two different parallel plate ion chambers and GAFChromic films. A typical open beam surface dose of 20% (relative to open beam Dmax) was increased to 63% by the coil padding material and to >74% by all other materials when placed in direct contact with the phantom, irrespective of magnetic field presence or orientation. Without a magnetic field, the surface dose decreased as the test materials were moved away from the phantom surface toward the radiation source, reaching between 30% and 40% at 10 cm gap between the phantom and the test materials. In the presence of the transverse magnetic field, the surface dose reduction was more rapid reaching a dose level of 30%-40% with only 3-4 cm gap. In the presence of the parallel magnetic field, as expected, the surface dose did not decrease considerably as the gap between the phantom surface and test materials was increased; the surface dose remained >60% at 10 cm gap for all tested materials except for the thin copper conductor. As expected, placing coil materials in direct contact with the phantom surface increases the surface dose considerably. The surface dose is reduced by creating a gap between the coil materials and phantom surface. This dose reduction happens more rapidly in the presence of a transverse magnetic field. However, the surface dose stays relatively large irrespective of the gap in the presence of a parallel magnetic field. Thus, the standard, off-the-shelf RF coils should be used with caution in integrated linac-MR systems, especially those using a parallel magnetic field orientation in which case the RF coils will probably need to be reconfigured to create open ports for the radiation beam.

Detection of delamination in composite laminates using Lamb wave based nonlinear method

In this study, a Lamb wave based nonlinear method is used to detect delamination in a composite laminate. For this purpose, an artificial delamination is created in a composite laminate using a thin Teflon sheet. The research includes an experimental study as well as finite element simulation. Two higher harmonics are observed in the Lamb wave response as a result of contact nonlinearity at the delamination. A spectral damage index is extracted from the spectral information of the fundamental and higher harmonics. It is found to be invariant to the sensor location and its values show decreasing trend with increase in the delamination width. Further, a new hybrid method is introduced, wherein the spectral and temporal data are used together in order to locate a delamination.

Study on intelligent recognition detection technology of debond defects for ceramic matrix composites based on terahertz time domain spectroscopy.

With the wide use of high-temperature-resistant ceramic matrix composites (CMCs) in aviation and space flight, it is important to detect the quality of the bonding. This paper used terahertz (THz) time-domain spectroscopy nondestructive testing technology to inspect the bonding defects of the CMC. This paper puts forward a method-extraction method, which is applied to make samples to simulate the bonding defect of CMC by embedding polytetrafluoroethylene (PTFE) sheets with 0.12 mm thickness into the adhesive layer and extracting it after curing and presetting the bonding defects. On the basis of the classical and analytical algorithms, such as the maximum in time-domain and power spectrum integration, through further study in the THz spectral characteristics of bonding samples for CMC, we specifically introduce the upper debond coefficient, lower debond coefficient, average absorption coefficient for the frequency domain, centroid coefficient for the frequency domain, and other characteristics. By optimizing the THz detection characteristics set, as a sample, we adopt the neural network intelligent recognition algorithm to detect the upper and lower debond defects in samples and realize the intelligent identification for CMC debond defects.

Influence of Cathode Catalyst Layer Structure on PEFC Performance Using Two-Dimensional Carbon Support for Pt Catalyst

Introduction Polymer electrolyte fuel cell (PEFC) has been attracting much attention due to its high efficiency at low operating temperature. However, since platinum (Pt), which is used for the electrode catalyst in the cathode, is a metal of low abundance and high cost, reduction of the Pt usage is required. Generally, nano-size Pt particles supported on carbon black are used to increase the mass activity. However, nanoparticles have problems in durability. Moreover, since some Pt particles are located inside the pore of the support, diffusion of supplied oxygen and produced water are suppressed. Recently, nanostructured thin film (NSTF)1) and Pt thin film fabricated by atomic layer deposition (ALD)2) are reported as alternative catalysts. However, they are fabricated on non-conducting materials. Takenaka et al. fabricated metal oxide nanofilms using graphene oxide (GO) as a template to form two-dimensional (2-D) catalysts3). 2-D catalysts are expected to show high mass activity due to the high surface area, and high conductivity during power generation due to the reduced GO and/or metal oxide. In this study, membrane electrode assembly (MEA) was prepared using Pt/GO catalyst, and the relationship between the performance and the structure of the electrode catalyst layer using 2-D carbon support for Pt catalyst was investigated to obtain information towards low Pt loaded PEFC. Experimental Catalyst inks were prepared by mixing Pt /Graphene oxide (Pt/GO), carbon black (CB), n-Propyl alcohol, and distilled water, and then the mixture was sonicated. 5 wt.% Nafion® solution was added to the mixture which was sonicated again. Catalyst ink was mixed by rotation revolution mixer. Then it was coated onto polytetrafluoroethylene (PTFE) sheet using doctor blade method to fabricate catalyst layer (CL). CL and Pt/carbon paper were hot-pressed onto each side of the Nafion® membrane. After the PTFE sheet was peeled off, carbon paper was hot-pressed onto CL to fabricate the MEA. Terminal voltage vs. current density of the MEA was measured at 80 ˚C. Results and Discussion Terminal voltage vs. current density of MEA with various ionomer/carbon ratios (I/C) using Pt/GO are shown in Fig. 1. As it can be seen in the figure, the cell performance in the low current density region was higher when I/C was higher. This indicates that reactive sites have increased due to the coating of catalyst by ionomer. On the other hand, MEA prepared with low I/C showed higher cell performance in the high current density region. It is considered that ohmic resistance was reduced due to the thin coating of catalyst by ionomer. References 1) M. K. Debe, J. Electrochem. Soc, 160 (6), F522-F534 (2013) 2) M. Inaba, T. Suzuki, T. Hatanaka, Y. Morimoto, J. Electrochem. Soc, 162 (7), F634-F638 (2015) 3) S. Takenaka, S. Miyake, S. Uwai, H. Matsune, M. Kishida, J. Phys. Chem. C, 119 (22), 12445-12454 (2015) Figure 1

An Overview of Asian Rhinoplasty

East Asian rhinoplasty is an expanding topic in the field of rhinoplasty. Although the main principles of various rhinoplasty techniques apply equally to the East Asian nose, East Asian rhinoplasty is unique owing to its different anatomy and ethnicity. In recent years, there have been some noteworthy developments in East Asian rhinoplasty. Traditional techniques using alloplastic implants with endonasal approach are changing due to the advent of new beauty concept, introduction of new techniques, and development of newly improved materials expended polytetrafluoroethylene as an alloplastic material has gained popularity in Asian augmentation rhinoplasty. Soft expended polytetrafluoroethylene sheets as augmentation material provide promise in the future. In this review, we will highlight some of the recent advances of Asian rhinoplasty with emphasis on dorsal augmentation, advances in implant material, and tip surgery using autologous cartilage.

Femtosecond laser ablated durable superhydrophobic PTFE films with micro-through-holes for oil/water separation: Separating oil from water and corrosive solutions

Separating the mixture of water and oil by the superhydrophobic porous materials has attracted increasing research interests; however, the surface microstructures and chemical composition of those materials are easily destroyed in a harsh environment, resulting in materials losing the superhydrophobicity as well as the oil/water separation function. In this paper, a kind of rough microstructures was formed on polytetrafluoroethylene (PTFE) sheet by femtosecond laser treatment. The rough surfaces showed durable superhydrophobicity and ultralow water adhesion even after storing in various harsh environment for a long time, including strong acid, strong alkali, and high temperature. A micro-through-holes array was further generated on the rough superhydrophobic PTFE film by a subsequent mechanical drilling process. The resultant sample was successfully applied in the field of oil/water separation due to the inverse superhydrophobicity and superoleophilicity. The designed separation system is also very efficient to separate the mixtures of oil and corrosive acid/alkali solutions, exhibiting the strong potential for practical application.