- 标题
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Advanced thin gas barriers film incorporating alternating structure of PEALD-based Al2O3/organic-inorganic nanohybrid layers
摘要： In this work, we reported excellent plasma-enhanced atomic layer deposition (PEALD)-based Al2O3/organic-inorganic (O-I) nanohybrid gas barrier film which exhibits ultralow water vapor transmission rate (WVTR), high activation energy for permeation, high optical transmission in visible light and sufficient flexibility. The values of WVTR and activation energy for permeation of our PEALD-based Al2O3/O-I nanohybrid 4 pair gas barrier film are obtained to be 7.83 × 10?5 g/m2/day (60 °C, 90% RH) and 103.10 kJ/mol via the electrical calcium test. Optical transmission in visible light is 96.14% and critical bending radius 7 mm–9 mm. Introduction of O-I nanohybrid layers between PEALD-based Al2O3 layers improved the properties of gas barrier films on anticorrosion, adhesion, and flexibility.
关键词： Anticorrosion,Encapsulation,Plasma enhanced atomic layer deposition (PEALD),Sol-gel,Nanoparticles,Organic-inorganic nanohybrid,Al2O3
更新于2025-09-19 17:15:36
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Femtosecond Laser Fabrication of Stable Hydrophilic and Anti-Corrosive Steel Surfaces
摘要： We report on a novel single-step method to develop steel surfaces with permanent highly hydrophilic and anti-corrosive properties, without employing any chemical coating. It is based on the femtosecond (fs) laser processing in a saturated background gas atmosphere. It is particularly shown that the fs laser microstructuring of steel in the presence of ammonia gas gives rise to pseudoperiodic arrays of microcones exhibiting highly hydrophilic properties, which are stable over time. This is in contrast to the conventional fs laser processing of steel in air, which always provides surfaces with progressively increasing hydrophobicity following irradiation. More importantly, the surfaces subjected to fs laser treatment in ammonia exhibit remarkable anti-corrosion properties, contrary to those processed in air, as well as untreated ones. The combination of two functionalities, namely hydrophilicity and corrosion resistance, together with the facile processing performed directly onto the steel surface, without the need to deposit any coating, opens the way for the laser-based production of high-performance steel components for a variety of applications, including mechanical parts, ?uidic components and consumer products.
关键词： femtosecond laser processing,wettability,steel,anticorrosion
更新于2025-09-11 14:15:04
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Some insights into the structure and morphology of surfactant-doped poly(o-toluidine)
摘要： Poly(o- toluidine) (POT) doped with dodecylbenzene sulfonic acid (DBSA) was synthesized by inverse emulsion polymerization and characterized systematically for morphological, structural, electrochemical, and thermal properties with scanning electron microscopy (SEM), cyclic voltammetry (CV), X- ray diffraction (XRD), and thermogravimetric analysis (TGA). SEM demonstrated irregular granular morphology of the polymer with high porosity similar to polyaniline (PANI). The size distribution of POT salts was analyzed using Nano Measurer 1.2.5 software from scanning electron micrographs. The semicrystalline nature, with crystallite size and d- spacing in the range of 21.4–30.2 nm and 4.93–4.99 ?, respectively, was confirmed from XRD. The activation energy (Ea) of degradation was calculated from TGA curves using Coats and Redfern (39.92–47.50 kJ/mol) & Horwitz and Metzger (50.09 ? 57.45 kJ/mol) methods, respectively. The small crystallite size, high thermal stability, and high values of the activation energy of degradation reveal that DBSA is an efficient dopant for POT and imparts interesting characteristics to this otherwise less thermally stable polymer. The fast rate of electron transfer of POT, as confirmed by electrochemical impedance spectroscopy, reveals its high electrochemical activity toward electrolyte. Potentiodynamic polarization measurement of POT- coated stainless steel showed large anodic potential shift as compared to uncoated stainless steel, illustrated good anticorrosion performance. The enhanced anticorrosion performance is due to synergic effect of dopant which increases the contortion of diffusion pathway of corrosive substance.
关键词： thermogravimetric analysis,cyclic voltammetry,stainless steel,poly(o-toluidine)-doped with dodecylbenzene sulfonic acid,X-ray diffraction,activation energy,anticorrosion
更新于2025-09-10 09:29:36