Surface and Interface Analysis最新文献_第6页

Industrial scale fouling of heat exchangers in isocyanate production 异氰酸酯生产过程中热交换器的工业规模结垢问题

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-02-05 DOI: 10.1002/sia.7292

C. Bevas, M. Abel, Ivo Jacobs, Peter Muller, Karin van Oudgaarden, John F. Watts

{"title":"Industrial scale fouling of heat exchangers in isocyanate production","authors":"C. Bevas, M. Abel, Ivo Jacobs, Peter Muller, Karin van Oudgaarden, John F. Watts","doi":"10.1002/sia.7292","DOIUrl":"https://doi.org/10.1002/sia.7292","url":null,"abstract":"The fouling of a commercial stainless steel (AISI 316L) during the manufacture of polymeric methylene diphenyl diisocyanate (pMDI) has been studied using laboratory‐based fouling apparatus that simulates commercial production conditions. The goal of the work is to understand the mechanisms behind the corrosion and fouling during isocyanate production with a view to improving process efficiency, not only in this process, but also others using similar plant and processes. Steel coupons were exposed to a solution of pMDI and solid amine hydrochloride, with hydrogen chloride gas being bubbled through the reaction cell. A number of different conditions were investigated, the variables being pMDI concentration, HCl gas flow duration, immersion time and temperature. Following the fouling experiments the coupons were removed from the fouling rig, photographed, and examined by XPS and ToF‐SIMS; principal component analysis was used to extend the ToF‐SIMS analysis to identify organic fouling products. The extent of fouling is shown to be relatively insensitive to pMDI concentration, but significantly influenced by continual HCl flow and increased temperature, features which increase the extent of substrate corrosion thought to be a precursor to the fouling process itself. Both XPS and ToF‐SIMS confirm the formation of various nickel chlorides in the corrosion process. Urea and metal corrosion products are found to co‐exist on certain (random) areas of the coupon surface.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139804742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Industrial scale fouling of heat exchangers in isocyanate production 异氰酸酯生产过程中热交换器的工业规模结垢问题

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-02-05 DOI: 10.1002/sia.7292

C. Bevas, M. Abel, Ivo Jacobs, Peter Muller, Karin van Oudgaarden, John F. Watts

{"title":"Industrial scale fouling of heat exchangers in isocyanate production","authors":"C. Bevas, M. Abel, Ivo Jacobs, Peter Muller, Karin van Oudgaarden, John F. Watts","doi":"10.1002/sia.7292","DOIUrl":"https://doi.org/10.1002/sia.7292","url":null,"abstract":"The fouling of a commercial stainless steel (AISI 316L) during the manufacture of polymeric methylene diphenyl diisocyanate (pMDI) has been studied using laboratory‐based fouling apparatus that simulates commercial production conditions. The goal of the work is to understand the mechanisms behind the corrosion and fouling during isocyanate production with a view to improving process efficiency, not only in this process, but also others using similar plant and processes. Steel coupons were exposed to a solution of pMDI and solid amine hydrochloride, with hydrogen chloride gas being bubbled through the reaction cell. A number of different conditions were investigated, the variables being pMDI concentration, HCl gas flow duration, immersion time and temperature. Following the fouling experiments the coupons were removed from the fouling rig, photographed, and examined by XPS and ToF‐SIMS; principal component analysis was used to extend the ToF‐SIMS analysis to identify organic fouling products. The extent of fouling is shown to be relatively insensitive to pMDI concentration, but significantly influenced by continual HCl flow and increased temperature, features which increase the extent of substrate corrosion thought to be a precursor to the fouling process itself. Both XPS and ToF‐SIMS confirm the formation of various nickel chlorides in the corrosion process. Urea and metal corrosion products are found to co‐exist on certain (random) areas of the coupon surface.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139864679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Maximizing visible Raman resolution of nanodiamond grains fabricated by coaxial arc plasma deposition through oxygen plasma etching optimization 通过优化氧等离子刻蚀，最大限度地提高同轴电弧等离子沉积法制造的纳米金刚石晶粒的可见拉曼分辨率

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-01-30 DOI: 10.1002/sia.7289

Sreenath Mylo Valappil, Abdelrahman Zkria, Phongsaphak Sittimart, Shinya Ohmagari, Tsuyoshi Yoshitake

{"title":"Maximizing visible Raman resolution of nanodiamond grains fabricated by coaxial arc plasma deposition through oxygen plasma etching optimization","authors":"Sreenath Mylo Valappil, Abdelrahman Zkria, Phongsaphak Sittimart, Shinya Ohmagari, Tsuyoshi Yoshitake","doi":"10.1002/sia.7289","DOIUrl":"https://doi.org/10.1002/sia.7289","url":null,"abstract":"Among the nondestructive carbon material characterization tools, the prominence of visible Raman spectroscopy has surged remarkably for many years due to its ability to explore a diverse array of carbon bonding configurations. However, to fully unlock the distinctive features concealed within carbon composite materials, additional specimen treatments or precise spectroscope calibrations are necessary. In the same regard, the tiny diamond grain size (5–10 nm) and the pronounced amount of sp2 carbon in the ultrananocrystalline diamond film represent major challenges in visible light excitation. In this work, we employ calibrated oxygen plasma reactive ion etching conditions to manifest the nanodiamond visible Raman signature from ultrananocrystalline diamond/amorphous carbon composite (UNCD/a-C) films fabricated by coaxial arc plasma deposition. Upon plasma etching, the broad defect band in the visible Raman spectra converged toward the diamond characteristic Raman peak at 1332 cm−1. A detailed explanation of band components of the Raman spectra is extracted through peak fitting procedures. The results of Raman spectroscopy are further correlated with the electrical characteristics of the nitrogen-doped UNCD/a-C films due to the optimized oxygen plasma etching processes.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139657453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface science insight note: A linear algebraic approach to elucidate native films on Fe3O4 surface 表面科学启示录：用线性代数方法阐明 Fe3O4 表面的原生薄膜

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-01-30 DOI: 10.1002/sia.7290

Pascal Bargiela, Vincent Fernandez, David Morgan, Neal Fairley, Jonas Baltrusaitis

{"title":"Surface science insight note: A linear algebraic approach to elucidate native films on Fe3O4 surface","authors":"Pascal Bargiela, Vincent Fernandez, David Morgan, Neal Fairley, Jonas Baltrusaitis","doi":"10.1002/sia.7290","DOIUrl":"https://doi.org/10.1002/sia.7290","url":null,"abstract":"Standard materials are often used to obtain spectra that can be compared to those from unknown samples. Spectra measured from these known substances are also used as a means of computing sensitivity factors to allow quantification by X-ray photoelectron spectroscopy (XPS) of less well-defined materials. Spectra from known materials also provide line shapes suitable for inclusion in spectral models which, when fitted to spectra, permit the chemical state for a sample to be assessed. Both types of information depend on isolating photoemission signals from the inelastically scattered signal. In this Insight note, technical issues associated with the use of XPS of as received Fe3O4 powder sample surface are discussed. The Insight note is designed to show how linear algebraic techniques applied to data collected from a sample marketed as pure Fe3O4 powder are used to verify that XPS has been performed on chemistry representative of the sample. The methods described in this Insight note can further be utilized in elucidating complex XPS data obtained from thin films formed or evolved during cyclic/non-steady use of complex (electro)catalyst surfaces, especially in the presence of contaminants.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139658081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailoring the surface properties of molybdenum oxytelluride thin films by its compositional ratio 通过成分比调整氧化碲钼薄膜的表面特性

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-01-29 DOI: 10.1002/sia.7288

Sangmin Han, Hee-Seung Yoon, Juyun Park, Jin-Woo Oh, Yong-Cheol Kang

引用次数: 0

Synergistic effect of new imidazoline derivative and 2-aminopyridine as corrosion inhibitors for Q235: Experimental and theoretical study 新型咪唑啉衍生物和 2- 氨基吡啶作为 Q235 缓蚀剂的协同效应：实验和理论研究

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-01-28 DOI: 10.1002/sia.7286

Pengjie Wang, Lin Fan, Yuhao Song, Kuaihai Deng, Lei Guo, Zhonghui Li, Yuanhua Lin

{"title":"Synergistic effect of new imidazoline derivative and 2-aminopyridine as corrosion inhibitors for Q235: Experimental and theoretical study","authors":"Pengjie Wang, Lin Fan, Yuhao Song, Kuaihai Deng, Lei Guo, Zhonghui Li, Yuanhua Lin","doi":"10.1002/sia.7286","DOIUrl":"https://doi.org/10.1002/sia.7286","url":null,"abstract":"In order to reduce the investment of corrosion inhibitors, based on experimental and theoretical studies, the corrosion inhibition and mechanism of new imidazoline derivatives (SMIS) and 2-aminopyridine (AMP) were investigated carefully. The best corrosion inhibition effect was at 0.7-g/L SMIS and 0.3-g/L AMP, the corrosion inhibition efficiency of weight loss, electrochemical impedance spectroscopy, and potentiodynamic polarization (Tafel) were 90.54%, 98.56% and 97.68%, respectively. Electrochemical research shows that SMIS& belongs to cathodic corrosion inhibition. SMIS& mainly increased the film resistance and charge transfer resistance in 1-M HCl, thus playing a certain role in corrosion inhibition. X-ray photoelectron spectroscopy and energy dispersive spectrometer proved that SMIS& can be adsorbed on the surface of Q235, molecular dynamics showed that there was a certain synergy between SMIS and AMP. This study confirmed that SMIS and AMP have a good synergistic effect, improve the corrosion inhibition efficiency, reduce the synthesis cost of SMIS, and have a certain guiding significance for synergistic corrosion inhibition.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139581410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wilhelmy balance—A simple and reliable method for determining immersion angles and surface energies even on non-planar and complex geometries? Wilhelmy 天平--即使在非平面和复杂几何形状上也能确定浸入角和表面能的简单可靠方法？

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-01-28 DOI: 10.1002/sia.7287

Marius Behnecke, Eva Berghaus, Alina Wildeis, Eva Brandes, Svea Petersen

{"title":"Wilhelmy balance—A simple and reliable method for determining immersion angles and surface energies even on non-planar and complex geometries?","authors":"Marius Behnecke, Eva Berghaus, Alina Wildeis, Eva Brandes, Svea Petersen","doi":"10.1002/sia.7287","DOIUrl":"https://doi.org/10.1002/sia.7287","url":null,"abstract":"The growing significance of surface properties in modern materials, particularly in medical technology, drives the need for accurate characterization techniques. Traditional contact angle measurements face challenges when applied to intricate surfaces like dental implants. Here, tensiometry applying the Wilhelmy plate method has been described in the last decade to offer one solution for the evaluation of complex surface geometries by quantifying apparent contact angles based on wetting forces. This study evaluates a simple setup employing the Wilhelmy balance concept for immersion angle determination. Instead of using a force sensor as in tensiometers, the wetting force is determined via changes in mass signal by means of an analytical balance available in standard laboratories. The force is thus recorded inverse to conventional tensiometry. The approach was validated on diverse geometries and extended to intricate structures, including plasma-treated dental implants. Results were compared to conventional contact angle analysis systems underlining the reliability of the method in characterizing non-planar and complex surfaces. Additionally, the method was successfully extended to the evaluation of surface energies on planar and non-planar surfaces using various solvent sets. However, results evidenced that specimen geometry can influence the measurements to such an extent that immersion contact angles can no longer be calculated due to capillary effects. An outlook suggests further exploration with a wider range of test liquids to enhance accuracy in surface energy determination.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139581407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing gamma irradiation resistance by a‐C film treatment on polytetrafluoroethylene (PTFE) surface 通过对聚四氟乙烯（PTFE）表面进行 A-C 薄膜处理增强其抗伽马辐照性能

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-01-10 DOI: 10.1002/sia.7285

Liqiang Chai, Pengxiang Ma, Chengyan Jiang, L. Qiao, Peng Wang

{"title":"Enhancing gamma irradiation resistance by a‐C film treatment on polytetrafluoroethylene (PTFE) surface","authors":"Liqiang Chai, Pengxiang Ma, Chengyan Jiang, L. Qiao, Peng Wang","doi":"10.1002/sia.7285","DOIUrl":"https://doi.org/10.1002/sia.7285","url":null,"abstract":"Polytetrafluoroethylene (PTFE) solid self‐lubricating materials exhibit inferior tribological properties in the gamma‐irradiated environment. In this paper, amorphous hydrogen‐free carbon (a‐C) film was deposited on the PTFE polymer surface by magnetron sputtering, and the a‐C/PTFE samples were irradiated with gamma ray at a maximum dose of up to 5 MGy. The evolution of the structure and nanomechanical and tribological properties of a‐C/PTFE with different irradiation doses were investigated. The structural analyses reveal that the microstructure of a‐C films irradiated at 5 MGy doses is stable. Due to the covering of the a‐C film, significant cracks appear at the surface of the a‐C/PTFE sample only when the irradiation dose reaches 5 MGy. Before and after irradiation, the nanohardness and Young's modulus of the a‐C/PTFE are significantly higher than those of PTFE. The mechanical properties of PTFE are improved by a‐C film surface treatment. The friction experiments show that the average friction coefficients of both a‐C/PTFE and PTFE remain stable around 0.175 with increasing irradiation dose. When the irradiation dose is within 1 MGy, frictional behaviors occur only on the surface of a‐C films, and the wear rate of a‐C/PTFE is as low as 9.3 × 10−5 mm3/N.m, which is significantly lower than that of PTFE. The method of a‐C film treatment on the PTFE surface can dramatically improve the irradiation resistance of PTFE.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Importance of standard terminology in surface chemical analysis: ISO 18115-1:2023, general terms and terms used in spectroscopy 标准术语在表面化学分析中的重要性：ISO 18115-1:2023，光谱学中使用的一般术语和术语

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-01-09 DOI: 10.1002/sia.7284

Alexander G. Shard, Donald R. Baer, Charles A. Clifford

引用次数: 0

Effect of hydrogen on the chemical state, stoichiometry and density of amorphous Al2O3 films grown by thermal atomic layer deposition 氢对热原子层沉积法生长的无定形 Al2O3 薄膜的化学状态、化学计量和密度的影响

IF 1.7 4区化学

Surface and Interface Analysis Pub Date : 2024-01-07 DOI: 10.1002/sia.7282

Claudia Cancellieri, Simon Gramatte, Olivier Politano, Léo Lapeyre, Fedor Klimashin, Krzysztof Mackosz, Ivo Utke, Zbynek Novotny, Arnold M. Müller, Christof Vockenhuber, Vladyslav Turlo, Lars P. H. Jeurgens

{"title":"Effect of hydrogen on the chemical state, stoichiometry and density of amorphous Al2O3 films grown by thermal atomic layer deposition","authors":"Claudia Cancellieri, Simon Gramatte, Olivier Politano, Léo Lapeyre, Fedor Klimashin, Krzysztof Mackosz, Ivo Utke, Zbynek Novotny, Arnold M. Müller, Christof Vockenhuber, Vladyslav Turlo, Lars P. H. Jeurgens","doi":"10.1002/sia.7282","DOIUrl":"https://doi.org/10.1002/sia.7282","url":null,"abstract":"Amorphous oxide thin films grown by thermal atomic layer deposition (ALD) typically contain high impurity concentrations of hydrogen, which affects both chemistry and structure and thereby the functional properties, such as the barrier properties in, for example, microelectronic and photovoltaic devices. This study discloses the effect of H incorporation in amorphous Al2O3 ALD oxide films on the local chemical binding states of Al, O and H, as well as the oxide density and stoichiometry, by a combined analytical approach using elastic recoil detection analysis, Rutherford backscattering spectroscopy and full chemical state analysis by dual-source X-ray photoelectron spectroscopy (XPS)/hard X-ray photoelectron spectroscopy (HAXPES). The experimental findings are compared with crystalline anhydrous α-Al2O3 and hydroxide α-Al (OH)3 reference phases and further supported by molecular dynamic simulations. It is shown that H preferably forms covalent –OH hydroxyl bonds with O in the nearest-neighbour coordination spheres of interstitial Al cations, which affects both the ligand electronic polarizability and the bond length of the randomly interconnected [AlOn] polyhedral building blocks in the amorphous ALD oxide films.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139408690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0