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surface modification of a MCFC Anode by Electrochemical Alloying

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Rare Metals 2001年第2期20卷 126-129页

作者： Hong Chen, Baizheng Fang (Key Lab of New Packaging Materials & Teclmologies, Zhuzhou Engineering College, Zhuzhou 412008, China) 株洲工学院湖南株洲 412008

Considering the properties of the valve metal alloys with specific corrosion resistance and electrocatalytic activity, an investigation was made to examine if nickel-niobium allo) could serve as the anode material for molten carbonate fuel cell (MCFC). An attempt was made to produce nickel-niobium surface alloy by an electrochemical process in the molten fluorides and to testify its performance required by the MCFC anode. Experimental results indicated that the corrosion resistance as well as polarization performance of the nickel electrode was improved by the surface alloying. As far as the corrosion resistance and polarization performance is concerned, the nickel-niobium surface alloy can be considered as a candidate material for the anode of MCFC.

关键词： surface modification alloying nickel-niobium alloy MCFC anode

surface modification of an up-conversion luminescence material by overcoating with SiO_2 and its characterization

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Rare Metals 2007年第3期26卷 276-279页

作者： CUI Lili LIU Jiemin FAN Huili XU Xiaowei YANG Min XIAO Junping Department of Chemistry University of Science and Technology Beijing Beijing 100083 China Department of Inorganic Nonmetallic Materials University of Science and Technology Beijing Beijing 100083 China

The surface of an up-conversion luminescence material was modified by overcoating with SiOa, which was synthesized from a hydrolysis progress of telraethoxysilane （TEOS） in alkalescent condition. By analyzing the hydrolyzed mechanism of TEOS, it was found that there was not only physical adsorption but also chemical bonding between the up-conversion material and SiO2. At the same time, some adsorption bands at 1100, 475, 950, and 3500 cm^-1 were found by FI-IR, which were the characteristic bands of Si-OH and Si-O-Si. By analyzing the surface elements of the coated material by XPS, it was found that its surface only included Si, O, and C elements, and not F and Y. In the picture of XRD, there was no additional peak after surface modification, suggesting that the silica shell was amorphous. The small peak at 20 = 23° in the X-ray diffraction pattern of the coated material was caused by the amorphous SiO2 shell, and the TEM image also proved that the surface of the material was successfully modified by overcoating with SiO2. The amount of hydroxyls was then increased on the surface of the material, which made it easy to connect with other active groups.

关键词： surface modification SiO2 sol-gel up-conversation luminescence

surface modification of Polyethylene (PE) Films Using Dielectric Barrier Discharge Plasma at Atmospheric Pressure

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Plasma Science and Technology 2008年第4期10卷 433-437页

作者：王坤李建任春生王德真王友年 Department of Nuclear Engineering and Nuclear Technology Engineering and Technical College of Chengdu University of TechnologyLeshan 614007China State Key Laboratory of Material modification by Electron Ion and Laser BeamsDalian University of TechnologyDalian 116024China

modification of the surface properties of polyethylene （PE） films is studied using air dielectric barrier discharge at atmospheric pressure. The treated samples are examined by Water contact angle measurements, Fourier transform infrared attenuated total reflection spectroscopy （FTIR-ATR）, X-ray photoelectron spectroscopy （XPS） and scanning electron microscopy （SEM）. With the increase in treating time, the water contact angle changes from 93.2° before treatment to a minimum of 53.3° after a treatment for 50 s. Both ATR and XPS results show some oxidized species are introduced into the sample surface by the plasma treatment and the tendency of the water contact angle with the treating time is the same as that of oxygen concentration on the treated sample surface. SEM result shows the surface roughness of PE samples increases with the treatment time increasing.

关键词： air dielectric barrier discharge polyethylene surface modification wettability

surface modification OF CaCO_3 WITH DENDRITIC CARBOXYLIC ACIDS

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Chinese Journal of Polymer Science 2002年第3期20卷 231-235页

作者： Zhao-xia Guo Jian Yu Institute of Polymer Science and Engineering Department of Chemical Engineering Tsinghua University Beijing 100084 China Tsing Hua Univ Dept Chem Engn Inst Polymer Sci & Engn Beijing 100084 Peoples R China

Nanometer calcium carbonate was modified with Frechet type polyether dendrons bearing a COOH group at thefocal point by a wet-coating technique in dichloromethane at room temperature. The interaction between CaCO;and thedendritic modifier was proven by IR and mass spectroscopy of the modified CaCO;after thorough extraction withdichloromethane. The amount of tightly bonded organic modifier was estimated by TGA. It was shown that the amount ofbonded molecules decreased with increasing generation number due to the larger number of branches. Compared tounmodified CaCO;, the modified CaCO;possess different dispersibility in water and in organic solvents.

关键词： calcium carbonate surface modification polyether dendrimer dendritic carboxylic acid

surface modification and functionalization by electrical discharge coating:a comprehensive review

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International Journal of Extreme Manufacturing 2020年第1期2卷 68-99页

作者： Pay Jun Liew Ching Yee Yap Jingsi Wang Tianfeng Zhou Jiwang Yan Fakulti Kejuruteraan Pembuatan Universiti Teknikal Malaysia MelakaHang Tuah Jaya76100Durian TunggalMelakaMalaysia Marine Engineering College Dalian Maritime University1 Linghai RoadGanjingzi DistrictDalian 116026People’s Republic of China Key Laboratory of Fundamental Science for Advanced Machining Beijing Institute of TechnologyNo.5 Zhongguancun South StreetHaidian DistrictBeijing 100081People’s Republic of China Department of Mechanical Engineering Faculty of Science and TechnologyKeio UniversityHiyoshi 3-14-1Kohoku-kuYokohama 223-8522Japan

Hard coatings are extensively required in industry for protecting mechanical/structural parts that withstand extremely high temperature,stress,chemical corrosion,and other hostile *** discharge coating(EDC)is an emerging surface modification technology to produce such hard coatings by using electrical discharges to coat a layer of material on workpiece surface to modify and enhance the surface characteristics or create new surface *** paper presents a comprehensive overview of EDC technologies for various materials,and summarises the types and key parameters of EDC processes as well as the characteristics of resulting *** provides a systematic summary of the fundamentals and key features of the EDC processes,as well as its applications and future trends.

关键词： electrical discharge coating(EDC) surface modification material characteristics mechanical properties extreme conditions

surface modification of Intraocular Lenses

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Chinese Medical Journal 2016年第2期129卷 206-214页

作者： Qi Huang George Pak-Man Cheng Kin Chiu Gui-Qin Wang Department of Ophthalmology Navy General Hospital of PLA Beijing 100048 China Department of Ophthalmilogy Third Clinical Medical College of Southern Medical University Guangzhou Guangdong 510515 China Department of Ophthalmology Hong Kong Laser Eye Center Hong Kong 999077 China Department of Ophthalmology Laboratory of Retina Brain Research l:he Univeisity of Hong Kong Hong Kong 999077 China State Key Laboratory of Brain and Cognitive Sciences The University of Hong Kong Hong Kong 999077 China Research Centre of Heart Brain Hormone and Healthy Aging The University of Hong Kong Hong Kong 999077 China

Objective： This paper aimed to review the current literature on the surface modification ofintraocular lenses （IOLs）. Data Sources： All articles about surface modification of IOLs published up to 2015 were identified through a literature search on both PubMed and ScienceDirect. Study Selection： The articles on the surface modification of 1OLs were included, but those on design modification and surface coating were excluded. Results： Technology of surface modification included plasma, ion beam, layer-by-layer self-assembly, ultraviolet radiation, and ozone. The main molecules introduced into IOLs surface were poly （ethylene glycol）, polyhedral oligomeric silsesquioxane, 2-methacryloyloxyethyl phosphorylcholine, TiO2, heparin, F-heparin, titanium, titanium nitride, vinyl pyrrolidone, and inhibitors of cytokines. The surface modification either resulted in a more hydrophobic lens, a more hydrophilic lens, or a lens with a hydrophilic anterior and hydrophobic posterior surface. Advances in research regarding surface modification of ｜OLs had led to a better biocompatibility in both in vitro and animal experiments. Conclusion： The surface modification is an efficient, convenient, economic and promising method to improve the biocompatibility of IOLs.

关键词： Biocompatibility Capsule Biocompatibility Cataract Intraocular Lenses surface modification Uveal Biocompatibility

surface modification of hydrophobic NaYF_4:Yb,Er upconversion nanophosphors and their applications for immunoassay

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Science China Chemistry 2011年第8期54卷 1292-1297页

作者： LIU ChengHui, WANG Zhe, WANG XiaoKe & LI ZhengPing Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China Key Laboratory of Medicinal Chemistry and Molecular Diagnosis Ministry of Education College of Chemistry and Environmental Science Hebei University Baoding China

β-NaYFa：Yb,Er upconversion nanophosphor （UCNP） is known as one of the most efficient NIR-to-visible upconversion mate- dais, which shows great potential in bioanalytical chemistry and bioimaging. However, its applications are greatly limited due to its low water dispersibility and thus poor biocompatibility. In this paper, poly（acrylic acid）（PAA）-based ligand exchange strategies are carded out to modify oleic acid-capped hydrophobic β-NaYF4：Yb,Er UCNPs into hydrophilic ones. After efficient surface modification, the presence of free carboxylic acid groups on the surfaces of UCNPs results in high solubility in water, and also allows further conjugation with NH2-containing biomolecules. Facilitated by the covalent linkage between the -COOH groups on UCNPs surfaces and -NHz groups in antigen/antibody, a sensitive immunosensor is constructed by using PAA-functionalized β-NaYFa：Yb,Er UCNPs as biolabels. Through monitoring the upconversion fluorescence intensity or fluorescent imaging of the final immunocomplexes, high sensitivity is achieved for the proposed immunoassay and as low as 0.1 ng/mL goat anti-human immunoglobulin G （IgG） can be detected, which suggests that PAA-modified UCNPs may serve as an ideal candidate for use as bioanalysis and bioimaging probes.

关键词： surface modification upconversion nanophosphor ligand exchange immunoassay bioimaging

surface modification of natural cellulose substances:toward functional materials and applications

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Science China Chemistry 2014年第12期57卷 1672-1682页

作者： LUO Yan HUANG Jian Guo Department of Chemistry Zhejiang University

Combining various synthetic chemical processes and biological assemblies provides a promising strategy for the design and fabrication of functional materials with tailored structures and *** unique multilevel structures and morphologies of natural cellulose substances such as ordinary commercial laboratory filter paper make them ideal platforms for the self-assemblies of various functional guest molecules that are to be deposited on the surfaces of their fine structures,and the resulting composite matters show significant potentials for various *** surface sol-gel process was employed to deposit ultrathin metal-oxide(e.g.,titania and zirconia)gel films to coat the cellulose nanofibers in bulk filter papers;thereafter,monolayers of specific guest substrates were immobilized onto the surfaces of the metal-oxide gel *** selective,sensitive,and reversible chemosensors based on the surface modification of filter paper were obtained toward the fluorescence and colorimetric detection of various analytes such as heavy-metal ions,inorganic anions,amino acids,and *** composite materials with superhydrophobic,antibacterial,or luminescent properties were fabricated by self-assembly approaches toward practical applications.

关键词： cellulose self-assembly thin films surface modification

surface modification of apatite-wollastonite glass ceramic by synthetic coupling agent

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Frontiers of Materials Science 2014年第2期8卷 157-164页

作者： Qin LONG Da-Li ZHOU Xiang ZHANG Jia-Bei ZHOU College of Chemical Engineering Sichuan University Chengdu 610065 China College of Materials Science and Engineering Sichuan University Chengdu 610064 China Gannan Medical University Ganzhou 341000 China

In this study, lysine was introduced into the surface of apatite-wollastonite glass ceramic （AW-GC） to improve its cytocompatibility by two steps reaction procedure. Firstly, lysine connected to N-β-（aminoethyl）-y-aminopropyl trimethoxy silane （A-1120） by covalent binding of amide group. Secondly, the lysine-functionalized A-1120 was deposited on the surface of AW-GC through a silanization reaction involving a covalent attachment. FTIR spectra indicated that lysine had been immobilized onto the surface of AW-GC successfully. Bioactivity of the surface modified AW-GC was investigated by simulated body fluid （SBF）, and the in vitro cytocompatibility was evaluated by coculturing with human osteosarcoma cell MG63. The results showed that the process of hydroxyapatite layer formed on the modified material was similar to AW-GC while the mode of hydroxyapatite deposition was changed. The growth of MG63 cells showed that modifying the AW-GC surface with lysine enhances the cell adhesion and proliferation.

关键词： surface modification apatite-wollastonite glass ceramic (AW-GC) lysine silane coupling agent cytocompaUbility