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Experimental and theoretical investigations on synergistic effect of surfactants as corrosion inhibitor on steel in acid medium 表面活性剂在酸性介质中对钢缓蚀剂协同作用的实验与理论研究
IF 3.5 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-04-14 DOI: 10.1680/jsuin.22.01091
Jia-nan Fan, Heng Yang, Hanwen Zhang, Peng Han, Haobo Yu, Lei Zhang
The inhibition performances of inhibitor C8TAB-MP (a mixture of Octyltrimethylammonium bromide (C8TAB) and 4-mercaptopyridine (4MP)), C8TAB and 4MP toward A3 steel in 0.5 M hydrochloric acid solution were studied at 25 °C. The studied inhibitors worked in a hybrid form, mainly controlling the cathodic reaction. Their adsorption follows the Langmuir isotherm, and the compositional combination is superior to the sum of their individual properties. The highest inhibition efficiency of C8TAB-MP was 99.4% at a concentration of 200 mg L−1. Surface morphologies of samples were obtained from AFM tests. Synergistic effect between C8TAB and 4MP is due to the C8TAB molecules donating electrons and the 4MP molecules accepting electrons.
抑制剂C8TAB-MP(辛基三甲基溴化铵(C8TAB)和4-巯基吡啶(4MP)的混合物)、C8TAB和4MP在0.5 M盐酸溶液在25°C下进行研究。所研究的抑制剂以混合形式工作,主要控制阴极反应。它们的吸附遵循朗缪尔等温线,并且组成组合优于它们各自性质的总和。当浓度为200时,C8TAB-MP的最高抑制率为99.4% mg L−1。通过AFM测试获得了样品的表面形貌。C8TAB和4MP之间的协同效应是由于C8TAB分子提供电子而4MP分子接受电子。
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引用次数: 0
Fabrication of robust superhydrophobic-superoleophilic mesh for oil-water separation under harsh environment 用于恶劣环境下油水分离的坚固超疏水超亲油网的制备
IF 3.5 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-03-27 DOI: 10.1680/jsuin.22.01098
Yingya Zhai, Xinming Zhang, Xiaodong Yang, Shuwei Lv, Jinghe Zhao, Lei Bie, Feng Liu
Frequent oil spillage at sea and waste oily water draining cause severe harms to the environment and economy. Although various extreme wettable materials are designed to achieve oil-water separation, there are still limitations such as expensive materials, fluorine-containing reagents, and poor robustness of oil-water separating materials. Here, we resolved the above problems by proposing a simple and low-cost sandblasting plating method with Ni, P, and 1-octadecanethiol modification to manufacture a robust superhydrophobic stainless steel mesh for separating oily water under harsh environments. The mesh can achieve the light and heavy oily water with outstanding separating efficiency and high purity. It can be also used to separate HCl solution, NaOH solution, and NaCl solution-oil, with the separating efficiency larger than 95%. Moreover, the mesh still was superhydrophobic and had outstanding oil-water separating efficiency after sandpaper abrasion, tape stripping, simulated seawater corrosion, and natural environment corrosion tests. Therefore, the robust superhydrophobic stainless steel mesh proposed in this work can very efficiently separate oily water in harsh environments.
频繁的海上溢油和废弃含油污水排放对环境和经济造成严重危害。尽管设计了各种极端可湿性材料来实现油水分离,但仍然存在材料昂贵、含氟试剂、油水分离材料坚固性差等局限性。在这里,我们通过提出一种简单且低成本的喷砂电镀方法来解决上述问题,该方法使用Ni、P和1-十八烷硫醇改性来制造坚固的超疏水不锈钢网,用于在恶劣环境下分离含油水。该筛网可实现轻质和重质油水的分离,分离效率高,纯度高。它还可用于分离HCl溶液、NaOH溶液和NaCl溶液油,分离效率大于95%。此外,经过砂纸磨损、胶带剥离、模拟海水腐蚀和自然环境腐蚀试验,该筛网仍然具有超疏水性,并具有优异的油水分离效率。因此,本工作中提出的坚固的超疏水不锈钢网可以在恶劣环境中非常有效地分离油水。
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引用次数: 1
Effects of tannic acid on film formation process of colored Ti/Zr-based conversion coatings 单宁酸对彩色Ti/Zr基转化膜成膜过程的影响
IF 3.5 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-03-17 DOI: 10.1680/jsuin.22.01093
Zhongmiao Liao, Aihua Yi, Wen Zhu, Kang Li, Wenfang Li
Corrosion of aluminum (Al) alloys represents a major issue in industrial applications, giving rise to safety concerns and enormous economic loss. Chromate conversion coatings (CCC) have been widely used in industry over past decades, providing exceptional corrosion protection at relatively low cost for Al alloys. However, new environmental regulations prohibiting the use of Cr(VI) have raised a growing interest in development of the alternative technologies to CCC, but only titanium/zirconium (Ti/Zr) conversion coatings have been used in industrial applications thus far. However, there remain some disadvantages to these coatings, such as colorless appearance and poor corrosion resistance, which affects their wide application. Here, a colored Ti/Zr-based conversion coating, formed on AA6063 Al alloy using a solution containing C76H52O46(tannic acid, TA), H2ZrF6, H2TiF6, and NaVO3, was developed recently by ours, enabling rapid film-formation at room temperature and improved corrosion resistance. The influence of TA on the film-forming process of colored Ti/Zr-based conversion coatings was investigated using UV-Vis, XPS, and IR techniques, and the possible reaction process after adding TA, as well as the mechanism of rapid film formation and color rendering, were also explored. The results showed that, the large number of organic complexes formed by TA with metal ion during the aging process of conversion solution and film formation are the main reasons for the rapid film formation and color rendering of coating.
铝合金的腐蚀是工业应用中的一个主要问题,引起了安全问题和巨大的经济损失。在过去的几十年里,铬酸盐转化涂层(CCC)在工业中得到了广泛的应用,以相对较低的成本为铝合金提供了卓越的腐蚀保护。然而,禁止使用Cr(VI)的新环境法规引起了人们对CCC替代技术开发的兴趣,但迄今为止,只有钛/锆(Ti/Zr)转化涂层用于工业应用。然而,这些涂层仍存在一些缺点,如外观无色、耐腐蚀性差,影响了其广泛应用。在这里,我们最近开发了一种着色的Ti/Zr基转化涂层,该涂层使用含有C76H52O46(单宁酸,TA)、H2ZrF6、H2TiF6和NaVO3的溶液在AA6063Al合金上形成,能够在室温下快速成膜并提高耐腐蚀性。利用UV-Vis、XPS和IR技术研究了TA对彩色Ti/Zr基转化涂层成膜过程的影响,并探讨了添加TA后可能的反应过程,以及快速成膜和显色的机理。结果表明,TA在转化液老化和成膜过程中与金属离子形成大量的有机配合物是导致涂层快速成膜和显色的主要原因。
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引用次数: 0
Surface modifications and optical studies of irradiated flexible PDMS materials 辐照柔性PDMS材料的表面改性及光学研究
IF 3.5 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-02-09 DOI: 10.1680/jsuin.22.01089
B. M. Alotaibi, M. Atta, E. Abdeltwab, A. Atta, M. Abdel-Hamid
This work aimed to modify the surface properties of polydimethylsiloxane (PDMS) for used in optoelectronic devices utilizing handmade ion source. The films were exposed to hydrogen fluence of 6x1017, 9x1017, and 12x1017 ions/cm2. XRD as well as FTIR were used to reveal the changes in PDMS after irradiation. Similarly, SEM is employed to examine the morphological alterations of irradiated surfaces. The band gap and band tail of pristine and treated films were estimated using Tauc’s methodology. By raising hydrogen fluence from 6x1017 ions/cm2 to 12x1017 ions/cm2, the band gap is lowered from 5.06 eV to 4.86 eV. Furthermore, the band tail energy is improved from 0.53 eV for PVA to 0.55 eV for 6x1017 and to 0.63 eV for 9x1017 ions/cm2. In addition, the dispersion characteristics of were estimated using the Wemple Di-Domenico method. Moreover, the extinction coefficients and refractive index were calculated. The recorded relaxation time is reduced from 2.06x10−7 sec to 1.65x10−7 sec respectively, by enhancing ion fluence from 6x1017 to 12x1017 ions/cm2. According to the finding results, ion beam irradiation is induced modification in the irradiated films for used in optical devices.
本工作旨在利用手工离子源对用于光电器件的聚二甲基硅氧烷(PDMS)的表面性质进行改性。将薄膜暴露在6x1017、9x1017和12x1017的氢通量下 使用XRD和FTIR来揭示辐照后PDMS的变化。类似地,使用SEM来检查辐照表面的形态变化。使用Tauc的方法估计了原始和处理过的薄膜的带隙和带尾。通过将氢通量从6x1017提高 离子/cm2至12x1017 离子/cm2,带隙从5.06降低 eV至4.86 eV。此外,带尾能量从0.53提高 PVA的eV至0.55 6x1017的eV和0.63 9x1017的eV 离子/cm2。此外,使用Wemple-Di-Domenico方法估计了的分散特性。此外,还计算了消光系数和折射率。通过将离子注量从6x1017提高到12x1017,记录的弛豫时间分别从2.06x10−7秒减少到1.65x10−7秒钟 离子/cm2。根据发现的结果,离子束辐照在用于光学器件的辐照膜中引起改性。
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引用次数: 4
Prediction of Escherichia coli concentration from wetting properties of beach sand using machine learning models 利用机器学习模型从沙滩的润湿特性预测大肠杆菌浓度
IF 3.5 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-02-03 DOI: 10.1680/jsuin.22.01087
Md Syam Hasan, Alma Nunez, Michael Nosonovsky, Marcia R. Silva
The presence of Escherichia coli (E. coli) in beach sand is directly related to public health outcomes. Physicochemical and wetting properties of sand influence the survival and proliferation of these indicator bacteria. In this study, we aim to predict E. coli concentration using some of these properties including zeta potential, moisture content, BET surface area, BET pore radius, state of sand, processing temperature, and water contact angle of the beach sand. We have developed five Machine Learning regression models including the Artificial Neural Network (ANN), Support Vector Machine (SVM), Gradient Boosting Machine (GBM), Random Forest (RF), and k-Nearest Neighbors (KNN) for this. ANN outperformed other models in predicting E. coli concentration. In the data-driven analysis, the state of sand, processing temperature, and the contact angle presenting the wettability of the sand are identified as the most crucial parameters in predicting E. coli concentration.
海滩沙中大肠杆菌的存在与公共卫生结果直接相关。沙子的理化性质和润湿性质影响这些指示菌的生存和增殖。在这项研究中,我们的目标是利用一些属性来预测大肠杆菌的浓度,包括zeta电位、水分含量、BET表面积、BET孔半径、沙子的状态、处理温度和海滩沙子的水接触角。为此,我们开发了五种机器学习回归模型,包括人工神经网络(ANN)、支持向量机(SVM)、梯度增强机(GBM)、随机森林(RF)和k近邻(KNN)。ANN在预测大肠杆菌浓度方面优于其他模型。在数据驱动的分析中,砂的状态、处理温度和代表砂润湿性的接触角被确定为预测大肠杆菌浓度的最关键参数。
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引用次数: 0
Surface Innovations: Referees 2022 表面创新:裁判员2022
4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-02-01 DOI: 10.1680/jsuin.2023.11.1.210
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引用次数: 0
Wetting stability of flexible superamphiphobic surfaces under stretching loading 拉伸载荷下柔性超双疏表面的润湿稳定性
4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-02-01 DOI: 10.1680/jsuin.21.00079
Shuangshuang Xu, Qing Wang, Ning Wang, Lei Qu
Wetting stability is important for superamphiphobic surfaces used in oil–water environments. Maintaining the wetting stability of flexible superamphiphobic surfaces under stretching is challenging. Here, flexible surfaces with stable superamphiphobicity under stretching were fabricated by covering flexible polydimethylsiloxane substrates with superamphiphobic powders. Superamphiphobic powders composed of micro- and nanoparticles were prepared by a chemical substitution reaction and modification treatment. The fabricated flexible surfaces possessed contact angles for water, kerosene and peanut oil of 155, 152 and 153°, respectively, exhibiting superhydrophobicity and superoleophobicity. The self-cleaning properties of the fabricated flexible surface were studied by removing contaminants from the surfaces using water and oil droplets. Also, the wettability and morphology of the fabricated flexible surface under stretching were investigated. It was found that the fabricated flexible surface maintained stable superhydrophobicity and superoleophobicity when the stretching strain reached 60% due to the fact that it still kept micro–nano double-scale structures after being stretched. The fabricated flexible surface coated with superamphiphobic powders with wetting stability is expected to be used in the field of liquid repellency.
润湿稳定性对油水环境中使用的超双疏表面非常重要。保持柔性超双疏表面在拉伸下的润湿稳定性是一个挑战。本研究通过在柔性聚二甲基硅氧烷基底上覆盖超两疏粉末,制备了具有稳定超两疏性的拉伸柔性表面。通过化学取代反应和改性处理制备了由微粒子和纳米粒子组成的超双疏粉。制备的柔性表面对水、煤油和花生油的接触角分别为155°、152°和153°,表现出超疏水性和超疏油性。通过水滴和油滴去除表面污染物,研究了制备的柔性表面的自清洁性能。研究了拉伸作用下柔性表面的润湿性和形貌。研究发现,当拉伸应变达到60%时,制备的柔性表面由于拉伸后仍保持微纳双尺度结构而保持稳定的超疏水性和超疏油性。所制备的具有湿润稳定性的超双疏粉末涂覆柔性表面有望在液体驱避领域得到应用。
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引用次数: 2
Award-winning paper in 2021 2021年获奖论文
4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-02-01 DOI: 10.1680/jsuin.2023.11.1.209
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引用次数: 0
Mask-assisted chemical processing methods to fabricate wettability patterns on copper substrates for liquid manipulation 掩模辅助化学处理方法在铜衬底上制造用于液体操作的润湿性图案
IF 3.5 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-01-26 DOI: 10.1680/jsuin.22.01075
Wangyu Liu, Zhen Liang, Weigui Xie, Guangwen Huang, Yuanqiang Luo
Extreme wettability-patterned surfaces have attracted great attentions due to their excellent application prospects for liquid manipulation. However, developing a simple and universal method to fabricate wettability patterns on a variety of metals remains a great challenge. In this work, we developed three specific preparation approaches to fabricate wettability patterns on copper substrate using chemical processing combined with mask technology. Surface wettability can be suitably controlled by changing the solution concentration and immersing time. The surface has good stability and low pollution under external action. Three preparation methods have differences in preparation process, wettability and mask function. On the basis of these approaches, various complex wettability patterns could be prepared on different metal substrates using designed masks. Furthermore, various wettability-patterned surfaces were successfully fabricated for liquid manipulating applications, such as controlling fluid shape and water transport. These methods proposed is expected to have promising application potential in patternable printing, water collection and heat-dissipation devices.
极端润湿性图案化表面由于其在液体操纵中的良好应用前景而引起了人们的极大关注。然而,开发一种简单通用的方法来在各种金属上制造润湿性图案仍然是一个巨大的挑战。在这项工作中,我们开发了三种特定的制备方法,利用化学处理和掩模技术在铜衬底上制备润湿性图案。可以通过改变溶液浓度和浸渍时间来适当地控制表面润湿性。该表面在外部作用下具有良好的稳定性和低污染。三种制备方法在制备工艺、润湿性和掩模功能方面存在差异。基于这些方法,可以使用设计的掩模在不同的金属基底上制备各种复杂的润湿性图案。此外,成功地制备了各种润湿性图案化表面,用于液体操纵应用,例如控制流体形状和水传输。这些方法有望在可图案化印刷、集水和散热器件中具有很好的应用潜力。
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引用次数: 0
Preparation and corrosion resistance of KTNT-waterborne polyurethane coatings ktnt水性聚氨酯涂料的制备及其耐腐蚀性能
IF 3.5 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2023-01-16 DOI: 10.1680/jsuin.20.00054
Xia Wang, Xiong Li, Ling Feng Xu, Q. Zhang, Yue Gu
In this study, titanate nanotubes (TNTs) were prepared via the hydrothermal method and then modified with γ-aminopropyltriethoxysilane (KH550) to obtain KTNTs with good dispersion properties. A KTNT-WPU composite coating was prepared by blending KTNTs with waterborne polyurethane (WPU). Fourier transform infrared spectroscopy (FT-IR) was used to characterize TNT compositions before and after modification. Thermogravimetric analysis (TGA) and electrochemical impedance spectroscopy (EIS) were used to test the thermal stability and corrosion resistance of the composite coating. The results showed that KH550 was successfully connected to the TNT surface. This improved thermal stabilities and corrosion resistances of the KTNT-WPU coatings. The fastest thermal decomposition rate for the 0.5% KTNT composite coating was 2%/min lower than that of the pure WPU coating. At the same time, the impedance of the composite coating could reach 7.58×107 Ω·cm2, the corrosion current density was 3.20×10−9 A·cm-2, and the corrosion inhibition rate reached 99.87%. The composite coating had an effective corrosion protection time of 120 h and the protective effect of the coating weakened when the immersion time exceeded 360 h.
本研究采用水热法制备了钛酸纳米管(TNTs),然后用γ-氨基丙基三乙氧基硅烷(KH550)对其进行改性,得到了具有良好分散性能的KTNTs。将KTNTs与水性聚氨酯(WPU)共混,制备了KTNT-WPU复合涂料。利用傅立叶变换红外光谱(FT-IR)对改性前后TNT的组成进行了表征。采用热重分析(TGA)和电化学阻抗谱(EIS)测试了复合涂层的热稳定性和耐腐蚀性。结果表明,KH550成功地与TNT表面连接。这提高了KTNT-WPU涂层的热稳定性和耐腐蚀性。0.5%KTNT复合涂层的最快热分解速率比纯WPU涂层低2%/min。同时,复合涂层的阻抗可达7.58×107 Ω·cm2,腐蚀电流密度为3.20×10−9 A·cm-2,缓蚀率达到99.87%。复合涂层的有效防腐时间为120 h,并且当浸渍时间超过360时,涂层的保护作用减弱 h。
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引用次数: 0
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Surface Innovations
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