Contact Angles Of Ethylene Glycol Research Articles

Daytime radiative cooling aerogel with favorable amphiphobic surface properties

Passive daytime radiative cooling technology without any electricity input offers great promise to mitigate carbon emissions and greenhouse effects. As a type of daytime radiative cooling emitters (DRCEs), daytime radiative cooling aerogel attracts a lot of attention and has great advantages in minimizing parasitic solar absorption and reducing environmental heat gain. However, designing daytime radiative cooling aerogel with amphiphobic surface properties is still challenging. Herein, a novel daytime radiative cooling aerogel based on eco-friendly bacterial cellulose (BC) as the skeleton, modified barium sulfate (BaSO4) as functional particles and fluoride coating as amphiphobic surface modifier was developed by simple freeze-drying and spraying. The optimal daytime radiative cooling aerogel, designated as M-BC/BaSO4-14 (M-BC/BaSO4-14 refers to the modified BC/BaSO4 aerogel), exhibited a high average reflectivity (95.6%) and excellent average emissivity (98.1%). The M-BC/BaSO4-14 achieved a mean temperature drop of 6.64°C and maximum temperature drop of 13.30°C on a cloudy day, and a mean temperature drop of 8.49°C and maximum temperature drop of 12.34°C on a clear day. It should be noted that the temperature drop referred to the temperature inside the measurement box (called the inner ambient temperature throughout this article) not the true ambient temperature. Meanwhile, the M-BC/BaSO4-14 aerogel exhibited favorable amphiphobic surface properties (water contact angle of about 151°, ethylene glycol contact angle of 141° and N-Hexadecane contact angle of 139°) and daytime radiative cooling performance before and after self-cleaning changed insignificantly. This work provides a viable strategy for the simultaneous improvement of the spectral properties and amphiphobic surface properties of the DRCEs.

Enhancement of Bacterial Anti-Adhesion Properties on Robust PDMS Micro-Structure Using a Simple Flame Treatment Method.

Biofilm-associated infections caused by an accumulation of micro-organisms and pathogens significantly impact the environment, health risks, and the global economy. Currently, a non-biocide-releasing superhydrophobic surface is a potential solution for antibacterial purposes. This research demonstrated a well-designed robust polydimethylsiloxane (PDMS) micro-structure and a flame treatment process with improved hydrophobicity and bacterial anti-adhesion properties. After the flame treatment at 700 ± 20 °C for 15 s, unique flower-petal re-entrant nano-structures were formed on pillars (PIL-F, width: 1.87 ± 0.30 μm, height: 7.76 ± 0.13 μm, aspect ratio (A.R.): 4.14) and circular rings with eight stripe supporters (C-RESS-F, width: 0.50 ± 0.04 μm, height: 3.55 ± 0.11 μm, A.R.: 7.10) PDMS micro-patterns. The water contact angle (WCA) and ethylene glycol contact angle (EGCA) of flame-treated flat-PDMS (FLT-F), PIL–F, and C–RESS-F patterns were (133.9 ± 3.8°, 128.6 ± 5.3°), (156.1 ± 1.5°, 151.5 ± 2.1°), and (146.3 ± 3.5°, 150.7 ± 1.8°), respectively. The Escherichia coli adhesion on the C-RESS-F micro-pattern with hydrophobicity and superoleophobicity was 42.6%, 31.8%, and 2.9% less than FLT-F, PIL-F, and Teflon surfaces. Therefore, the flame-treated C-RESS-F pattern is one of the promising bacterial anti-adhesion micro-structures in practical utilization for various applications.

Superhydrophobic and superoleophobic property enhancement on guard ring micro-patterned PDMS with simple flame treatment

Effects of new micro-structure design, a flame treatment process, and the addition of semifluorinated silane (SFS) on an improvement of superhydrophobicity and superoleophobicity of PDMS surfaces were investigated in this study. PDMS and PDMS-SFS surfaces with the special design of circular rings and eight stripe supporters (C-RESS) with a hexagonal guard ring (HGR) structure were found to be the most durable which maintained their superhydrophobicity after scratch tests. The flame treatment at 700 °C/15 s formed a unique nanoscale flower-like on the PDMS-SFS surface. A formation of re-entrant micro-structure on the C-RESS with the HGR structure exhibited superhydrophobicity and superoleophobicity with water and ethylene glycol contact angles of 160.5° ± 2.0° and 160.2° ± 6.6°, respectively. The addition of the SFS was found to increase surface roughness and decrease surface energy. In conclusion, the flame-treated C-RESS with the HGR structure on the PDMS-SFS surface is considered one of the promising antifouling approaches in several applications.

Superhydrophobic and superoleophobic properties enhancement on PDMS micro-structure using simple flame treatment method

In this research, a simple flame treatment method was explored to generate micro−/nano-structures on polydimethylsiloxane (PDMS) micro-patterns. Ethanol soaked paper wipes were used as a flame source at a temperature of 700 ± 20 °C. After flame-treated for 30 s, a unique flower petal nano-structures were formed on all surface types: flat PDMS (PDMS-FLT) and PDMS with square pillar pattern (PDMS-PIL) and PDMS with rectangular ridge patterns (PDMS-REC). The flower petal nano-structures, which acts like a re-entrant micro−/nano-structure, was formed by an aggregation of organosilicon compounds in PDMS matrix. Averaged values of surface roughness of the PDMS-FLT, the PDMS-REC and the PDMS-PIL have increased to 298.9, 662.3, and 731.1 nm, respectively. The PDMS-PIL surface that was flame-treated for 30 s exhibited superhydrophobic and superoleophobic properties with water and ethylene glycol contact angle greater than 150°. Those properties led to liquid droplets spreading out instantly and rolling off very fast. Therefore, the flame treatment is expected to be one promising method to fabricate biomimetic surface with good reproducibility and stability on a large-scale antifouling surface for various applications.

Surface parameters of as-built additive manufactured metal for intraosseous dental implants

Statement of problemTo improve osseointegration, current machined implants are submitted to different surface treatments such as airborne-particle abrasion and acid etching. Although additive manufacturing has allowed the fabrication of implants with custom design, porosity, and roughness, whether good osseointegration can be achieved without subsequent surface treatments is still unclear. PurposeThe purpose of this in vitro study was to investigate the feasibility of using additive manufacturing technology for dental implants without the use of subsequent surface treatments. Material and methodsThe roughness, wettability, and surface energy of a flat test stainless-steel specimen produced from a 3D printer were evaluated. The roughness measurements were obtained by using a mechanical contact profilometer. The wettability was characterized by the sessile drop method by using deionized water and ethylene glycol. The surface energy values were calculated by using the Owens, Wendt, Rabel, and Kaeble (OWRK) computational method. ResultsThe experimental data obtained were Ra=4.55 μm, Rq=5.64 μm, RSm=0.235 mm, Rsk=-0.071, Rku=3.740, Rdq=13 degrees; water contact angle=66 degrees; ethylene glycol contact angle=57 degrees; surface energy=38 mN/m. The measured values were compared with data reported in the literature for commercially available implants. The parameter Ra, which is the most used parameter to describe the surface of dental implants, was 50%, 270%, and 329% higher than that reported in the literature for commercial dental implants. The surface energy was 10% and 19% lower than the representative values in the literature for commercial dental implants. ConclusionsThe results indicate that specimens fabricated by additive manufacturing had higher roughness and lower surface energy than reported results in the literature. Therefore, additive manufacturing was found to produce suitable surface parameters for dental implants, and subsequent surface treatments could be removed from the manufacturing process.

Fabrication of superhydrophobic and oleophobic thin films with high stability and self-healing property

We fabricated the superhydrophobic and oleophobic thin film via layer-by-layer assembling of three kinds of silica nanoparticles and chemical vapor depositing of 1H,1H,2H,2H-perfluorooctyl trichlorosilane (PFTS). The water contact angle of the thin film could reach to 170°, and the contact angle of ethylene glycol was 140°. The thin film could recover the superhydrophobic property after the oxygen plasma treatment. Meanwhile, the thin film could endure the xenon lamp irradiation and water impact experiments.

Durable Self-Cleaning Surfaces with Superhydrophobic and Highly Oleophobic Properties.

Functional surfaces with superhydrophobic and superoleophobic properties are of great interest in many applications. However, such surfaces are generally difficult to obtain. Although a few superamphiphobic surfaces have been developed recently, a challenge still remains in preparing such a surface with good durability which is a critical issue in practical application. In this study, we demonstrate a facile method for preparing durable superhydrophobic and highly oleophobic surfaces using two kinds of nanoparticles. Epoxy resin is used as the adhesive material to improve the wear resistance of the surfaces. ZnO nanoparticles and SiO2 nanoparticles are used to create high surface roughness. The prepared surfaces exhibit excellent superhydrophobicity and high oleophobicity once the nanoparticles are treated with 1 H,1 H,2 H,2 H-perfluorodecyltriethoxydsilane (FAS-17). Water and ethylene glycol contact angles of the coatings can reach up to 172 ? 2? and 157 ? 2?, respectively. After undergoing strong adhesive tape peeling and mechanical abrasion, the coatings still maintain good amphiphobicity.

Low-temperature plasma treatment of polylactic acid and PLA/HA composite material

Investigations of the surface physicochemical properties of polylactic acid and polylactic acid/hydroxyapatite composite in a 70/30 ratio modified by atmospheric pressure low-temperature glow discharge argon plasma with the pulse duration of 1 μs and 5 μs and repetition rate of 100 kHz are described. Plasma modification of such materials may significantly affect physicochemical properties of surface. The polymerization of l-lactide was carried out at a temperature of 155 °C for 6 h. X-ray diffraction analysis shows that the degree of crystallinity of polylactic acid and composites based on polylactic acid/hydroxyapatite composite increases after plasma treatment due to polymer chain disruption. Infrared spectroscopy indicates that the –C=O absorption band intensity increases with plasma pulse duration, in turn indicating oxidation processes occurring in the polylactic acid surface layers. The wettability characteristics of the materials are improved by the plasma treatment, resulting in decreased water, glycerol, and ethylene glycol contact angle, and enhanced free surface energy.

Preparation and characterisation of montmorillonite-ammonium silane surface layers promoting adhesion between steel and a polyurethane adhesive

Novel pro-adhesive surface layers on a steel substrate were created via electrostatic adsorption of montmorillonite platelets on ammonium silane layers based on (3-aminopropyl)trimethoxysilane. Morphology of the mentioned montmorillonite-ammonium silane surface layers (MSL) (prepared using clays with calcium, strontium and diisopropylammonium exchangeable cations) was analysed by means of SEM, EDX and XRD techniques. The MSL significantly reduced dipropylene glycol contact angle (−14°) and roughness (−38%) of the steel substrate as well as increased its corrosion rate (+160%) and shear strength of joints prepared using a commercial 2K polyurethane adhesive (+77%). Additionally, the steel samples with MSL created by means of Ca- or Sr-montmorillonite exhibited markedly higher shear strength after their exposition in a salts spray chamber (+316% and +311%, respectively) in relation to untreated samples.

Fabrication of a super‐amphiphobic aluminium alloy surface via wire electrical discharge machining and chemical etching technology

A simple method, involving twice electric machining by HS-WEDM and chemical etching, is used to fabricate super-amphiphobic (both super-hydrophobic and super-oleophobic) surfaces on aluminium alloy. The surface morphology of the samples was investigated using scanning electron microscopy and laser scanning confocal microscope. The evaluations of surface oleophobicity were carried out using the contact angles of ethylene glycol, diiodomethane and dodecane. Finally, the experimental result indicated that after the twice electric machining and chemical etching, the micro/nanometre-scale binary rough structure was presented on the sample surfaces, and the resulting sample surfaces produced in this method had super-hydrophobic and lipophilic properties (water contact angle of 155.74°). More importantly, after surface fluorination, the sample surfaces turned to super-amphiphobic surfaces and the biggest contact angles of water and oil were 156.24° and 157.34°, respectively. Therefore, it can be considered that the acquirement of the micro/nanometre-scale rough structures and the reduction of the surface energy are essential requirements to fabricate super-amphiphobic surfaces. The advantages of the present method over the other methods are that the used wire electrical discharge machining can machine most metals, and the processes of surface forming and microstructure fabrication were combined, which saves processing time greatly.

Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching

For the development of high efficiency porous supports for composite membrane preparation, polysulfone (PSf) hollow fiber membranes (outer diameter 1.57 mm, inner diameter 1.12 mm) were modified by air plasma using the low temperature plasma treatment pilot plant which is easily scalable to industrial level and the Piranha etch (H2O2 + H2SO4). Chemical and plasma modification affected only surface layers and did not cause PSf chemical structure change. The modifications led to surface roughness decrease, which is of great importance for further thin film composite (TFC) membranes fabrication by dense selective layer coating, and also reduced water and ethylene glycol contact angle values for modified hollow fibers surface. Furthermore, the membranes surface energy increased two-fold. The Piranha mixture chemical modification did not change the membranes average pore size and gas permeance values, while air plasma treatment increased pore size 1.5-fold and also 2 order enhanced membranes surface porosity. Since membranes surface porosity increased due to air plasma treatment the modified membranes were used as efficient supports for preparation of high permeance TFC membranes by using poly[1-(trimethylsilyl)-1-propyne] as an example for selective layer fabrication.

Preparation and properties of crosslinkable waterborne polyurethane and polyurethane-acrylic hybrid emulsions and their crosslinked polymers

Stable emulsions of crosslinkable waterborne polyurethanes (CWPU) and waterborne polyurethane-acrylic (CWPU/AC) hybrid with various contents of trifunctional monomer (trimethylolpropane, TMP) and acrylic monomers were successfully prepared in this study. This study focused on the effects of crosslinkable TMP and acrylic monomer contents on the stability/average particle size/viscosity of CWPU and CWPU/AC hybrid emulsions, the mechanical/dynamic mechanical thermal properties, surface contact angle/tension and hardness/water swelling of CWPU and CWPU/AC hybrid film materials. The as-polymerized CWPU emulsion containing 0.06 mol (4.11 mol%) of TMP and CWPU/AC hybrid emulsion containing 60 wt% of acrylic monomer were found to be unstable, indicating that these contents were beyond the limit value of the self-emulsifying ability of dimethylol propionic acid (18.26 mol%). By XPS analysis, CWPU and CWPU/AC film samples were found to have silicone/fluorine enriched surface. The tensile strength/modulus/hardness of the film samples increased markedly with increasing crosslinkable TMP/acrylic monomer up to 0.04 mol/50 wt%, respectively. Meanwhile the elongation at break and water swelling % decreased significantly. The water/ethylene glycol contact angles increased/the surface tension decreased significantly with increasing crosslinkable TMP/acrylic monomer contents up to 0.04 mol/50 wt%. Thus, the optimum TMP/acrylic monomer contents were found to be about 0.04 mol/50 wt% to obtain high performance antifouling coating materials.

Influence of different chemical surface patterns on the dynamic wetting behaviour on flat and silanized silicon wafers during inclining-plate measurements: An experimental investigation with the high-precision drop shape analysis approach

Static and dynamic wetting behaviours of liquid droplets on functionalized solid surfaces are strongly influenced by the physical and chemical properties of the surface. The characterization and the correlation of these influence quantities to the wettability of a surface by means of contact angle measurements and drop shape analysis still remain a challenging task. Generally, contact angle measurements are performed by measuring the experimentally available advancing θa and receding θr contact angle. In this regard, water and ethylene glycol contact angles were measured on four well prepared model surfaces, which were hydrophobic modified by straightforward silanization with 1H,1H,2H,2H-perfluorooctyltrichlorosilane. The preparation procedure for the surfaces differed in terms of different pretreatments and applied coating procedures, leading to nearly flat surfaces without significant differences in surface roughness but different chemical surface textures. Atomic force microscopy and spectroscopic ellipsometry were applied to determine the surface roughness and layer thickness of the coatings, respectively, and the contact angle calculation was performed using the high-precision drop shape analysis (HPDSA) approach. Therefore, sessile-drops during the inclination of the sample surface were video recorded, which resulted in a sequence of non-axisymmetric drops. The resulting set of contact angle data (inclinationangle φ, contact angle θ) were further analysed by a recently developed contact angle analysis approach, which is based on the fitting of a modified sigmoid function onto the course of the contact angles relative to the inclination angle. This procedure has a fine local resolution and is very useful to characterize the overall wetting properties of a sample surface from a huge amount of contact angle data (about 74000 drop images=contact angles in this study) by only four fitting parameters. In this contribution, we illustrate the potential of this procedure to analyse the wetting and motion behaviours of sessile drops in dependence on different chemically patterned surface structures with a high local and temporal resolution, whereas even the naming of a more or less homogeneous surface coating was possible.

Effect of Radio Frequency Power on the Physicochemical Properties of MoS2 Films Obtained by rf Magnetron Sputtering

This paper presents the results of the fabrication and characterization of MoS2 thin films obtained at different radio frequency (rf) power using a surface profiler, a 4‐point probe, X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), and distilled water and ethylene glycol contact angle measurements. The thickness of MoS2 thin films increased from 100 to 240 nm as the rf power increased from 100 to 200 W. The surface resistance increased with increasing rf power. The high‐resolution XPS spectra indicated that Mo species with lower oxidation states formed in the MoS2 thin films at higher rf power. The ratio of Mo/S was independent of the rf power. The total surface‐free energy (SFE) varied by changing the rf power. The contribution of polar SFE was greater than dispersive SFE to the total SFE for all MoS2 films. The changing propensity of polar SFE was similar to the total SFE.

Effect of chain length on the wetting properties of alkyltrichlorosilane coated cellulose-based paper

The effect of alkyl chain length on the wetting properties of alkyltrichlorosilane coated cellulose-based paper is reported for four different reagents: methyltrichlorosilane (MTCS; –CH3), butyltrichlorosilane (BTCS; –C4H9), dodecyltrichlorosilane (DTCS; –C12H25) and octadecyltrichlorosilane (OTCS; –C18H37). SEM analysis reveals that by systematically varying alkyl chain length, films with different surface morphologies can be generated on flat silicon wafer control samples and on cellulose-based paper samples. The variation in surface morphology leads to different wetting behavior, as determined by measuring static water and oil contact angles. Due to the nano- and micron- scale roughness on MTCS coated substrates, paper samples coated with MTCS display superhydrophobicity with a water contact angle of 152.2°, which is the highest water contact angle among these four alkyltrichlorosilanes. However, additional nano-scale roughness from MTCS coating reduces the oil resistance of coated paper samples, while paper samples coated with long-chain alkyltrichlorosilanes have lower surface energy and also lack nano-scale roughness. As a result, paper samples coated with OTCS display the highest resistance against oils (ethylene glycol contact angle 125.5°; diiodomethane contact angle 101.3°). The intrinsic porosity of paper is largely retained after coating, as indicated by the fact that low surface tension fluids like methanol can easily penetrate coated paper samples.

Pore morphology control and hydrophilicity of polyacrylonitrile ultrafiltration membranes

ABSTRACTThe effects of different solvents (dimethyl formamide: DMF and dimethylsulfoxide: DMSO) on the solubility of polyacrylonitrile (PAN) were investigated by the phase diagrams of H2O/DMF/PAN and H2O/DMSO/PAN ternary systems through cloud‐point titration method at low polymer concentration. The influences of polymer concentrations and temperatures on the morphologies of PAN ultrafiltration membranes were elucidated. The morphologies of fabricated UF membranes were characterized by scanning electron microscopy (SEM) and atomic force microscope (AFM), and the basic performance of ultrafiltration including pure water flux and rejection of BSA were explored. At 25°C, the pure water flux of ultrafiltration membranes at the lower PAN content (16 wt % PAN in 84 wt % DMSO) reached 213.8 L/m/bar and the rejection of BSA was 100%. Interestingly, the water flux of UF membranes dramatically decreased to 20.6 L/m/bar (20 wt %) and 2.9 L/m/bar (24 wt %) when increasing PAN concentrations in DMSO. On the other hand, the hydrophilicity of membranes can be enhanced by increasing coagulation temperatures and polymer concentrations which were characterized by static contact angle, fitting well with the variation tendency of roughness. Although there are many works concerning on the effects of phase inversion conditions on the performance of PAN UF membranes, to our best knowledge, there is seldom works focusing on investigating the membrane hydrophilicity trend by adjusting phase inversion conditions. To disclose the reason of the enhanced hydrophilicity, the water and glycol contact angles of various membranes were measured and the surface tensions were presented. The results illustrated that the enhanced hydrophilicity of PAN UF membranes fabricated at higher temperatures or higher polymer concentrations was due to the higher polarity on membrane surface. Since the vast majority of ultrafiltration membranes in labs and in industrial scale have been fabricated by immersion phase inversion method, this work can provide a guidance to obtain hydrophilic PAN UF membranes by adjusting the process of phase inversion. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41991.

Dispersion and Polar Component of Specific Surface Free Energy of NaCl(100), KCl(100), and KBr(100) Single Crystal Surfaces

Contact angle of ethylene glycol and formamide on (100) faces of NaCl, KCl, and KBr single crystal was measured, and the specific surface free energy (SSFE) was calculated. Dispersion component of the SSFE was 90.57, 93.78, and 99.52 mN·m-1 for NaCl, KCl, and KBr, respectively. Polar component of the SSFE was 1.05, 0.65, and 0.45 mN·m-1 for NaCl, KCl, and KBr. Such a large ratio of dispersion component of SSFE results from the neutrality of the crystal surface of alkali halide. Lattice component of alkali halide is 780, 717 and 689 kJ·mol-1 for NaCl, KCl, and KBr. The larger lattice enthalpy decreases dispersion component, and increases polar component of the SSFE. The larger lattice enthalpy is considered to enhance the rumpling of the crystal surface more strongly, and such rumpling is considered to decrease the neutrality of the crystal surface.

Tin nitride thin films fabricated by reactive radio frequency magnetron sputtering at various nitrogen gas ratios

Sn nitride thin films are remarkable materials that can be implemented in applications such as microelectronic devices and recording media. This paper presents the analysis of the various Sn nitride thin films' structural, electrical, and chemical properties using a surface profiler, X-ray diffraction, a 4-point probe, X-ray photoelectron spectroscopy (XPS), and distilled water and ethylene glycol contact angle measurements. The Sn nitride thin films were prepared via radio frequency magnetron sputtering. The thickness of Sn nitride thin films decreased in the regions where N2 gas ratios ranged from 20% to 100%. The surface resistance decreased from 6.34×104 to 56.2Ω/sq with gradual increasing of N2 gas ratios from 20% to 100%. Change in crystallinity of the films was observed as N2 gas was progressively introduced, from metallic Sn to the amorphous Sn nitride phase. The high resolution XPS spectra indicates that the intensity of Sn2+ increased, while those of Sn4+ and Sn0 decreased with increasing N2 gas ratios, confirming the bond formation of Sn and N. The total surface free energy (SFE) varied by changing the N2 gas ratio. When the N2 gas ratio in the sputter gas was low (less than 20%), the dominant contributing factor to the total SFE switched from polar to dispersive SFE. In samples where the N2 gas ratio was over 20%, the major contribution to the total SFE was dispersive SFE.

Effect of the size of silica nanoparticles on wettability and surface chemistry of sol–gel superhydrophobic and oleophobic nanocomposite coatings

Superhydrophobic sol–gel nanocomposite coatings have been fabricated by incorporating silica nanoparticles with different particle sizes separately in an acid-catalyzed sol of methyltriethoxysilane (MTEOS). Water contact angle (WCA) of the coatings increased with increase in the concentration of silica nanoparticles in both the cases. The coatings became superhydrophobic at an optimum silica concentration. The water repellency was further improved by the addition of fluoroalkylsilane (FAS). The optimum silica concentration was found to depend on the size of silica nanoparticles and FAS content and the coatings exhibited WCA of about 160° and water sliding angle (WSA) of <2°. FAS addition also improved the oleophobicity of the coatings. The coatings exhibited oil-repellency with a lubricant oil contact angle of 126° and ethylene glycol contact angle of 153.3°. Surface morphology of the coatings analyzed using field emission scanning electron microscopy (FESEM) showed a rough surface with microscale bumps and nanoscale pores. XPS was used to study the surface composition of the coatings. The superhydrophobic property of the coatings was due to the synergistic effect of surface chemistry and surface microstructure and can be explained using Cassie-Baxter model.

A low-cost, high-efficiency and high-flexibility surface modification technology for a black bisphenol A polycarbonate board

• A low-cost, high-efficiency, high-flexibility surface modification technology was achieved. • Different laser modification parameters resulted in different surface microstructures. • These special microstructures played a deciding role in the surface properties. • After the modification, the surface energy was found to have a significant increase. • The technology would be advantageous to fabricate high-quality micro devices and systems. In this paper, a low-cost, high-efficiency and high-flexibility surface modification technology for polymer materials was achieved at high laser scanning speeds (600–1000 mm s −1 ) and using an all-solid state, Q-switched, high-average power, and nanosecond pulse ultraviolet (355 nm wavelength) laser. During the surface modification of a very important engineering plastic, i.e., black bisphenol A polycarbonate (BAPC) board, it was found that different laser parameters (e.g., laser fluence and pulse frequency) were able to result in different surface microstructures (e.g., many tiny protuberances or a porous microstructure with periodical V-type grooves). After the modification, although the total relative content of the oxygen-containing groups (e.g., C O and COO − ) on the BAPC surface increased, however, the special microstructures played a deciding role in the surface properties (e.g., contact angle and surface energy) of the BAPC. The change trend of the water contact angle on the BAPC surface was with an obvious increase, that of the diiodomethane contact angle was with a most decrease, and that of the ethylene glycol contact angle was between the above two. It showed that the wetting properties of the three liquids on the modified BAPC surface were different. Basing on the measurements of the contact angles of the three liquids, and according to the Young equation and the Lifshitz van der Waals and Lewis acid–base theory, the BAPC surface energy after the modification was calculated. The results were that, in a broad range of laser fluences, pulse frequencies and scanning speeds, the surface energy had a significant increase (e.g., from the original of about 44 mJ m −2 to the maximum of about 70 mJ m −2 ), and the higher the laser pulse frequency, the more significant the increase. This would be very advantageous to fabricate the high-quality micro-devices and micro-systems on the modified surface.