Surface Innovations最新文献_第6页

Self-crimping of multi-chain polymers into carbon nanotubes 多链聚合物自卷曲成碳纳米管

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-11-21 DOI: 10.1680/jsuin.22.01072

Wendi Gong, Houbo Yang, Danhui Zhang, Ruquan Liang, Jianhui Shi, Anmin Liu

引用次数: 0

Improvement of corrosion resistance and research on corrosion mechanism after depositing Ni-Y2O3/Ni-graphene composite coatings on NdFeB magnets 钕铁硼磁体Ni-Y2O3/ ni -石墨烯复合镀层耐蚀性能的提高及腐蚀机理研究

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-11-14 DOI: 10.1680/jsuin.22.01057

Yaru Zou, Yaojun Lu, S. Rehman, Xuehui Zhang, Sangen Luo, Chaoxiang Jin, Zhenggang Zou, Bin Yang, Munan Yang

{"title":"Improvement of corrosion resistance and research on corrosion mechanism after depositing Ni-Y2O3/Ni-graphene composite coatings on NdFeB magnets","authors":"Yaru Zou, Yaojun Lu, S. Rehman, Xuehui Zhang, Sangen Luo, Chaoxiang Jin, Zhenggang Zou, Bin Yang, Munan Yang","doi":"10.1680/jsuin.22.01057","DOIUrl":"https://doi.org/10.1680/jsuin.22.01057","url":null,"abstract":"In this paper, we studied the corrosion resistance of the composite deposition of Y2O3 and graphene on nickel coating. The corrosion resistance of the coating was significantly improved after the composite deposition, especially for the Ni-graphene coating with the addition of 0.05 g/L graphene. The Ecorr and Icorr of the coating were optimized to 404.340 mV and 0.24 × 10−8 A cm−2. The surface morphology, microstructure, passivation behavior, and corrosion products of the coating were analyzed, and the mechanism of corrosion resistance enhancement was revealed. The results show that the deposition of the Y2O3 and graphene composite can decrease the surface roughness of the coating. The graphene composite effect is the most significant and greatly reduces the contact area between the coating and the medium. In addition, the particle composite deposition can also yield grain refinement. The graphene composite deposition reduces the grain size from 75.3 to 18.9 nm, significantly improving the nucleation and formation of the passivation film. The uniform deposition of graphene at grain boundaries can also hinder the infiltration of corrosive media into the interior region. Upon the composite deposition, the improved corrosion resistance of magnets significantly increases their performance and service life, facilitating their railway applications.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44679132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of self-healing polythiourethane/epoxy anticorrosive coatings based on dynamic disulfide bonds 基于动态二硫键的自修复聚硫氨基甲酸酯/环氧防腐涂料的制备

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-11-07 DOI: 10.1680/jsuin.22.01065

Mieyi Wen, B. Ou, Ping Zhu, B.-J. Niu, Yan Gou, Lijuan Chen

{"title":"Preparation of self-healing polythiourethane/epoxy anticorrosive coatings based on dynamic disulfide bonds","authors":"Mieyi Wen, B. Ou, Ping Zhu, B.-J. Niu, Yan Gou, Lijuan Chen","doi":"10.1680/jsuin.22.01065","DOIUrl":"https://doi.org/10.1680/jsuin.22.01065","url":null,"abstract":"Defects and mechanical damage that leading to peeling, corrosion, and other potential hazards during practical applications were inevitable in epoxy coatings due to the high cross-link density of the epoxy network. Herein, we synthesized a self-healing polythiourethane material (SPTU) containing with dynamic disulfide bonds for the design and preparation of a self-healing SPTU/epoxy coating. FT-IR, 1H NMR and SEM showed that 2-hydroxyethyl disulfide was successfully introduced into the polythiourethane system. Due to the fracture and reattach of double sulfur bond, 3% SPTU-Epoxy coating exhibited good self-healing properties in scratch-treated, the scratch being repaired completely after 2 h at 85°C. Meanwhile, the tensile properties of the completely fractured 3% SPTU-Epoxy sample retained 75.7% after self-healing. The Tafel polarization crurve and electrochemical impedance spectroscopy (EIS) results demonstrate the 3% SPTU-Epoxy coating showed excellent corrosion resistance and still provides considerable corrosion resistance after 19 days of immersion corrosion tests. The self-healing coating exhibited good self-healing ability under heating conditions attributed to the bond breaking and reconnection of dynamic bonds provided by the self-healing component. The self-healing property and corrosion resistance of the prepared coating effectively improve the service life of the epoxy coating and provide some guidance for corrosion protection of epoxy coating.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45141896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluid droplet spreading and adhesion studied by a microbalance: a review 微天平研究液滴扩散和粘附的研究进展

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-10-28 DOI: 10.1680/jsuin.22.01050

Youhua Jiang, J. Drelich

{"title":"Fluid droplet spreading and adhesion studied by a microbalance: a review","authors":"Youhua Jiang, J. Drelich","doi":"10.1680/jsuin.22.01050","DOIUrl":"https://doi.org/10.1680/jsuin.22.01050","url":null,"abstract":"A contact angle observed for a liquid-solid system is not necessarily a unique value and a few contact angles need to be carefully considered in relation to liquid spreading, adhesion and phase separation. Understanding of the significance of different contact angles has improved in the last few years through direct measurements of interactive forces between droplets/bubbles and solids together with the simultaneous visualization of the changes in their shapes. A microelectronic balance system is employed to measure the force of spreading after either liquid droplet or gas bubble attachment to a substrate surface, and the droplet/bubble-substrate adhesion forces after droplet/bubble compression, retraction, and detachment. Equipped with a camera in flank and data acquisition software, the instrument measures directly the forces, monitors droplet/bubble-surface separation with respect to distances over which the droplet/bubble stretches and collects optical images simultaneously. The images are used to analyze capillary pressure and surface tension forces based on the measured droplet/bubble dimensions, shapes of surfaces and values of contact angles. These measurements allow researchers to correlate the advancing, receding and most-stable contact angles with liquid-solid interactive forces and analyze their scientific meaning. This review summarizes the very recent literature reports on measurements and interpretation of liquid droplet/gas bubble interactive forces and associated contact angles.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49519673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laminar drag reduction in closed channel using bioinspired textured surfaces 层流阻力减少在封闭通道使用生物启发纹理表面

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-10-20 DOI: 10.1680/jsuin.22.01069

Shaofeng Xu, Juhan Lin, Yifan Yu, Hubiao Wang, Junjie Lu

{"title":"Laminar drag reduction in closed channel using bioinspired textured surfaces","authors":"Shaofeng Xu, Juhan Lin, Yifan Yu, Hubiao Wang, Junjie Lu","doi":"10.1680/jsuin.22.01069","DOIUrl":"https://doi.org/10.1680/jsuin.22.01069","url":null,"abstract":"Low flow drag is of great importance to a variety of engineering applications, and an effective way to achieve low drag is to use bioinspired micro-structured surfaces. This work aims to reduce the skin-friction drag in closed channel flow using textured surfaces inspired by leaves of indocalamus and rice. The channel formed by a polydimethylsiloxane chunk and a silicon wafer was fabricated to study drag reduction behavior for water or liquid paraffin oil in laminar flow. Bioinspired textures were processed on silicon wafer surface using deep silicon plasma etching method. We measured the pressure drop of water or paraffin oil passing through textured channels with different velocities. The maximum pressure drop reduction for the paraffin oil flow with low velocity (Re≈1) and for the water flow with high velocity (Re<1000) were about 5.1% and 27.3%, respectively. We also presented the contact angles of bioinspired textured surface, and then proposed mechanisms to explain the drag reduction. The hydrophobicity leading to the changing from the liquid-solid interface to the liquid-air interface is believed to provides the drag reduction for water flow, while the thin oil film formed on the textured surface due to the oleophilicity helps to reduce the oil flow drag.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44339835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leidenfrost instability in a circular container and its suppression using a rod 圆形容器的莱顿弗罗斯特不稳定性及其棒材抑制

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-10-17 DOI: 10.1680/jsuin.22.01066

Manjarik Mrinal, Xiang Wang, Z. Han, C. Luo

{"title":"Leidenfrost instability in a circular container and its suppression using a rod","authors":"Manjarik Mrinal, Xiang Wang, Z. Han, C. Luo","doi":"10.1680/jsuin.22.01066","DOIUrl":"https://doi.org/10.1680/jsuin.22.01066","url":null,"abstract":"Leidenfrost drops have demonstrated promising applications in, for example, drag reduction. However, large Leidenfrost drops may be unstable when their diameters exceed a critical value, leading to less control of such drops in their applications. In this work, through theoretical and experimental investigations, we explore the instability of a Leidenfrost drop in a circular configuration, as well as the suppression of this instability using a small rod. There are four findings. First, the diameter of the largest inscribed cylinder inside a rod-container configuration is the critical dimension to determine Leidenfrost instability. Second, in the cases of water and isopropyl alcohol, the threshold value of this diameter is 8.3λ ± 0.3λ, where λ is the capillary length of a liquid. Third, due to the specific interface profile between the liquid drop and the surrounding vapor layer, the threshold diameter of a circular container for the instability to occur is slightly larger than its counterpart in the corresponding Rayleigh-Taylor instability problem. Fourth and finally, placing a rod inside a circular container reduces the size of the largest inscribed cylinder in the container. If the diameter of this inscribed cylinder is below the threshold value, the instability inside the container is suppressed.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46953157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A hard durable transparent antifouling coating prepared by crosslinking ZrO2 and branched polysiloxane ZrO2与支链聚硅氧烷交联制备硬质耐用透明防污涂料

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-10-12 DOI: 10.1680/jsuin.22.01049

Kaiqiang Zhang, Yong Zhu, Zhang Chen, Zongtao Zhang, Yanfeng Gao

引用次数: 0

Effects of deposition parameters on RF-sputtered WO3 thin films 沉积参数对射频溅射WO3薄膜的影响

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-10-03 DOI: 10.1680/jsuin.22.01031

Xiumei Zhu, H. Qi, Jiahao Chen, Jiangbin Su, Zuming He, B. Tang

引用次数: 3

Effect of graphene-family incorporation on corrosion performance of PEO coatings formed on titanium alloys: a mini review 石墨烯家族掺入对钛合金PEO涂层腐蚀性能的影响：综述

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-09-21 DOI: 10.1680/jsuin.22.01043

Meysam Pourshadloo, Hesam Asghar Rezaei, Mina Saeidnia, Hossein Alkokab, Masoud Soroush Bathaei

{"title":"Effect of graphene-family incorporation on corrosion performance of PEO coatings formed on titanium alloys: a mini review","authors":"Meysam Pourshadloo, Hesam Asghar Rezaei, Mina Saeidnia, Hossein Alkokab, Masoud Soroush Bathaei","doi":"10.1680/jsuin.22.01043","DOIUrl":"https://doi.org/10.1680/jsuin.22.01043","url":null,"abstract":"By being exposed to air or moisture or by a chemical reaction, titanium forms an oxide layers on its surface, which is stable and tightly adherent and provides it with protection from the environment, since titanium is a reactive material. Due to their extremely low thickness (∼10 nm), this oxide layer is easy to destroy under corrosion conditions. Through plasma electrolytic oxidation (PEO), titanium and titanium alloys can be equipped with thick and adhesive TiO2 coatings to enhance their surface characteristics. In the PEO process, TiO2 composite coatings can be formed by mixing proper additives with electrolytes, such as powders, particles, sheets, or compounds. The graphene and its family derivatives (i.e., graphene oxide and reduced graphene oxide) are among the most popular additives used in PEO composite coatings due to their high stability in corrosive media. Graphene family nanosheets can accumulate in PEO coatings because of their porous nature, changing the surface characteristics dramatically. The use of graphene family nanosheets in the electrolyte can be useful to reduce coating porosity and improve final corrosion properties by adjusting electrolyte conditions. Therefore, the diffusion pathways for corrosive ions in composite TiO2 coatings become considerably more tortuous than with pure TiO2.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48295881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Recent innovations in surface topography 表面形貌的最新创新

IF 3.5 4区材料科学

Surface Innovations Pub Date : 2022-09-21 DOI: 10.1680/jsuin.22.01041

Lily Chambers, P. Roach, N. Shirtcliffe

引用次数: 3