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Science China Materials 2023年第5期66卷 1997-2003页

作者： Jinho Park Junseop Lim Jun Yeob Lee School of Chemical Engineering Sungkyunkwan University 2066Seobu-roJangan-guSuwon-siGyeonggi-do16419Republic of Korea

A dibenzosilole-based host material was designed and characterized.The host material,9,9'-(5,5-diphenyl-5H-dibenzo[b,d]silole-2,8-diyl)bis(9H-carbazole)(SSiCz),was designed to enhance the electron transport properties and rigidity by coupling two phenyl units of the tetraphenyl silane of a strong hole transport type bis(4-(9Hcarbazol-9-yl)phenyl)diphenylsilane host.The device efficiency roll-off was improved considerably by balancing the carriers in the phosphorescent organic light-emitting diodes(PhOLEDs),and the driving voltage at high luminance was reduced.The red and green PhOLEDs exhibited high external quantum efficiencies(EQEs)of 23.8%and 24.9%,respectively,and a relieved efficiency roll-off.In addition,S-SiCz was used as an electron transport type host with a hole transport type3,3'-di(9H-carbazol-9-yl)-1,1'-biphenyl host.The maximum EQEs of the red and green PhOLEDs using the mixed host were 26.0%and 25.5%,respectively,and EQE roll-off values were 18%and 6%,respectively.Therefore,the planarization design strategy of the host is effective for better device performance.

关键词： OLEDs host material silane bipolar phosphorescent OLEDs

The improvement of dispersity, thermal stability and mechanical properties of collagen fibers by silane modification: an exploration for developing new leather making technology

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Journal of Leather Science and Engineering 2022年第1期4卷 358-368页

作者： Shuangfeng Xu Hanzhong Xiao Bi Shi Department of Biomass Chemistry and Engineering Sichuan UniversityChengdu 610065People’s Republic of China National Engineering Laboratory for Clean Technology of Leather Manufacture Sichuan UniversityChengdu 610065People’s Republic of China

The effect of hydrophobic modification on the performances of collagen fibers(CFs)was investigated by using silane coupling agents with different alkyl chains as hydrophobic modifiers.It was found silane could be easily grafted onto CF surface through covalent bonds under 5%water content.This modification led to the transformation of surface wettability of CF from hydrophilic to hydrophobic.Interestingly,the change of surface wettability resulted in substantial improvement of the modified CF properties,presenting well dispersity of collagen fibers,higher thermal stability and enhanced mechanical properties in comparison with natural CF.The degree of improvement mainly depended on the length of alkyl chain in silane.Longer alkyl chain produced strong hydrophobicity and subsequently more superior performances of the modified CF.When the length of alkyl chain increased to 18 carbon atoms,the modified CF possessed durable superhydrophobicity even exposed to aqueous solutions of different pH,UV,and organic solvents,and had excellent thermal and mechanical properties like leather fibers.In general,this work clearly revealed that the properties of CF are closely and positively related to the hydrophobicity,which is suggestive in developing new leather making technology.

关键词： Hydrophobic modification Collagen fibers silane New leather-making technology

Corrosion Resistance of silane-Modified Hydroxyapatite Films on Degradable Magnesium Alloys

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Acta Metallurgica Sinica(English Letters) 2018年第2期31卷 180-188页

作者： Yan-Bin Zhao Li-Qian Shi Lan-Yue Cui Chang-Lei Zhang Shuo-Qi Li Rong-Chang Zeng Fen Zhang Zhen-Lin Wang College of Materials Science and Engineering Shandong University of Science and Technology State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology College of Materials Science and Engineering Chongqing University of Technology

A polymethyltrimethoxysilane（PMTMS）/hydroxyapatite（HA） hybrid coating was successfully fabricated on a magnesium alloy by hydrothermal treatment and immersion method. The microstructure and composition of the coating were characterized by using X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy.The physical properties were investigated using scratch testing. At the same time, the corrosion resistance was evaluated via electrochemical and immersion tests. The results demonstrated that the corrosion resistance of the silane hybrid coating was significantly enhanced compared with the naked magnesium alloy. Especially, the corrosion current density of the PMTMS/HA magnesium alloy was three orders of magnitude lower than that of the bare material.

关键词： Magnesium alloys silane Hydroxyapatite Corrosion resistance Biomaterial

Corrosion resistance of Mg（OH）2/Mg-Al-layered double hydroxide coatings on magnesium alloy AZ31:influence of hydrolysis degree of silane

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Rare Metals 2019年第7期38卷 629-641页

作者： Qing-Song Yao Zhong-Chao Li Zai-Meng Qiu Fen Zhang Xiao-Bo Chen Dong-Chu Chen Shao-Kang Guan Rong-Chang Zeng College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China School of Engineering RMIT University Carlton VIC 3053 Australia School of Materials Science and Energy Engineering Foshan University Foshan 528000. China School of Materials Science and Engineering Zhengzhou University Zhengzhou 450002 China

Mg(OH)2/Mg-Al-layered double hydroxide (LDH) coatings were modified with methyltrimethoxysilane (MTMS) on magnesium alloys. Effect of hydrolysis degree of silane solution on coating formation was investigated. Chemical compositions and surface morphologies of the coatings were examined using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and field-emission scanning electronic microscopy (FESEM). Results indicated that the composite coatings consisted of polymethyltrimethoxysilane (PMTMS), LDH and Mg(OH)2. Electrochemical and hydrogen evolution measurements revealed that the composite coatings possessed good corrosion resistance, especially the ones prepared in a high hydrolysis degree of silane. The optimum corrosion resistance of the composite coati ng was LDH/PMTMS-3 coating, which had the lowest value of corrosion current density (5.537×10^-9 A·cm^-2) and a dense surface.Plausible mechanism for coating formation and corrosion process of MTMS-modified Mg(OH)2/Mg-Al-LDH coatings were discussed.

关键词： Magnesium alloy Layered double hydroxide (LDH) silane Coating Corrosion resistance

Rare earth and silane as chromate replacers for corrosion protection on galvanized steel

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Journal of Rare Earths 2009年第1期27卷 159-163页

作者：彭天兰满瑞林 School of Chemistry and Chemical Engineering Central South University

The present work aimed at using rare earth lanthanum salt and trimethoxy（viny）silance as chromate substitutes for galvanized steel passivation, in contrast to zinc coating samples treated with chromate.The corrosion resistance was assessed by electrochemical impedance spectroscopy（EIS） and neutral salt spray tests（NSS）.Scanning electron microscopy（SEM） was used to characterize the sample surfaces.The organic coating adhesion on the panel was also investigated via varnishes-cross cut tests.The results indicated that rare earth and silane two-step treatment gave more effective anticorrosion performance than Cr, which also provided good paint adhesion.The coating formation mechanism was also discussed.

关键词： silane corrosion lanthanum galvanized steel rare earths

Post treatment of silane and cerium salt as chromate replacers on galvanized steel

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Journal of Rare Earths 2009年第1期27卷 164-168页

作者：孔纲卢锦堂吴海江 School of Materials Science and Engineering South China University of Technology

A complex film on hot-dip galvanized steel sheet（HDG） was prepared by immersing the sheet in 0.1wt.% Ce（NO3）3 solution and 5vol.% silane solution in turn.The corrosion protection of the complex film was evaluated by potentiodynamic linear polarization（LPR）, electrochemical impendence spectra（EIS） and natural salt spray（NSS） tests and compared with that of single cerium film and silane film.The results showed that, the presence of these films on the zinc coating hindered corrosion reaction by reducing the rate of both anodic and cathodic reaction in the corrosion process, and the corrosion protection of the complex film was much better than that of single cerium film or silane film and closed to that of chromate film, because the polarization resistance Rp and electrochemical impendence were increased markedly.Microstructure and chemical composition of these pretreated films were also investigated by scanning electron microscopy（SEM） and AES.

关键词： cerium salt silane Galvanized steel passivation rare earths

Grafting silane onto Silicate Glass Surface Treated by DBD in Air

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Plasma Science and Technology 2008年第5期10卷 556-559页

作者：任春生王德真王友年 State Key Laboratory for Materials Modification by Electron Ion and Laser BeamsDalian University of TechnologyDalian 116023China

Dielectric barrier discharge plasma in air was used to modify glass surface to induce the graft of silane onto the treated surface to increase the possibility of biomolecule immobilization. The plasma treated glass had been characterized by scanning electron microscopy （SEM）, Fourier transform infrared attenuated total reflection spectroscopy, X-ray photoelectron spectroscopy （XPS） and surface water contact angle measurement. The validity of grafting silane onto glass surface was approved by the analysis of water contact angle measurement, SEM and XPS. The grafted silane content was measured by visible absorption spectroscopy using acid Orange-7. It is shown that the grafting density of silane for glass samples increases significantly after plasma treatment.

关键词： dielectric barrier discharge plasma biomolecule immobilization silane graft

Synthesis of 1,2-phenylenedimethanols by base-promoted reduction of isobenzofuran-1(3H)-ones with silane

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Chinese Chemical Letters 2019年第3期30卷 725-728页

作者： Bin Liu Xigeng Zhou Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Technology Research Insititute of Shanghai Huayi (Group) Company

An efficient method for preparation of substituted 1,2-phenylenedimethanols and aliphatic 1,4-diols that are valuable intermediates in organic synthesis, has been developed by the base-promoted reduction of isobenzofuran-1(3H)-ones and y-lactones with silane under mild conditions. Compared with traditional procedures using stoichiometric amounts of metal hydrides and alkyl reductants, the present method avoids the use of sensitive reagents and is operationally simple and a broad variety of functional groups are tolerated.

关键词： Isobenzofuran-1(3H)-one 1,2-Phenylenedimethanol Reductive transformation Ring-opening reaction silane

Surface Modification of Fire-retardant Asphalt with silane Coupling Agent

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Journal of Wuhan University of Technology(Materials Science) 2012年第2期27卷 310-315页

作者：陈辉强 School of Civil Engineering & Architecture Chongqing Jiaotong Univeisity

The theory and approach of the surface modified of asphalt fire-retardant with silane coupling agent were introduced. The optimum silane dosage was determined, and the structure and properties of the asphalt fire-retardant before and after the surface modification were characterized by infrared spectrum and thermo gravimetric analysis. The dispersion effect of asphalt flre-retardant was studied. The influence of the surface modification on the hydrophilicity and lipophilicity of the asphalt fire-retardant was analyzed. The experimental results showed that there were physical and chemical interactions between the silane coupling agent and the asphalt fire-retardant, which reduced the surface polarity of the asphalt fire retardant. The optimum silane coupling agent dosage was 0.95% of the asphalt fire retardant. The surface modification improved the thermal stability, dispersibility and lipophilicity of the asphalt fire retardant, which enhanced the compatibility between asphalt fire retardant and asphalt.

关键词： silane asphalt fire-retardant coupling agent surface modification

Effect of silane Coupling Agent Concentration on Interfacial Properties of Basalt Fiber Reinforced Composites

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材料科学与工程（中英文A版） 2023年第2期13卷 36-42页

作者： Takao Ota Department of Control Engineering National Institute of TechnologyNara College22 Yata-choYamatokoriyamaNara 639-1080Japan

The purpose of this study is to investigate the effect of the concentration of silane coupling solution on the tensile strength of basalt fiber and the interfacial properties of basalt fiber reinforced polymer composites.The surface treatment of basalt fibers was carried out using an aqueous alcohol solution method.Basalt fibers were subjected to surface treatment with 3-Methacryloxypropyl trimethoxy silane at 0.5 wt.%,1 wt.%,2 wt.%,4 wt.%and 10 wt.%.The basalt monofilament tensile tests were carried out to investigate the variation in strength with the concentration of the silane coupling agent.The microdroplet test was performed to examine the effect of the concentration of the silane coupling agent on interfacial strength of basalt reinforced polymer composites.The film was formed on the surface of the basalt fiber treated silane coupling agent solution.The tensile strength of basalt fiber increased because the damaged fiber surface was repaired by the firm of silane coupling agent.The firm was effective in not only the surface protection of basalt fiber but also the improvement on the interfacial strength of fiber-matrix interface.However,the surface treatment using the high concentration silane coupling agent solution has an adverse effect on the mechanical properties of the composite materials,because of causing the degradation of the interfacial strength of the composite materials.

关键词： Natural mineral fiber reinforced composites basalt fiber silane coupling agent interface fiber/matrix bond