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ELECTROPLATED Zn-Ni-SiO_2 COmPOSITE COATINGS TREATED WITH A SILANE COUPLING AGENT TO REPLACE CHROmATING

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Acta metallurgica Sinica(English Letters) 2005年第3期18卷 416-422页

作者： m. Hino m. Hiramatsu K. murakami A. Saijo T. Kanadani Industrial Technology Research Institute of Okayama Prefecture Haga Okayama-sh i Okayama 701-1296 Japan Industrial Technology Research Institute of Okayama Prefecture Haga Okayama-sh i Okayama 701-1296 Japan Industrial Technology Research Institute of Okayama Prefecture Haga Okayama-sh i Okayama 701-1296 Japan Hori Metal Finishing Industry Co.Ltd. Abe Ochiai-cho Takahashi-shi Okayama 716-0061 Japan Graduate School of Okayama University of Science Ridai-cho Okayama-shi Okayam a 700-0005 Japan

The fixing of a silane coupling agent to Zn-Ni-silica (SiO2) composite coatings was studied for the purpose of developing a coating process as an alternative to chromating. The corrosion resistance of Zn-Ni-silica composite coatings was rem arkably improved by the silica nanoparticles in the composite, which were disper sed in the surface of this film. The silane coupling agent formed chemical bonds with the inorganic silica particles during the silane coupling treatment on the se composite coatings. The treatment suppressed the formation of white corrosion products to the same extent as chromating, as measured in salt spray tests. It is concluded that treating Zn-Ni-silica composite coatings with silane coupling agents is a viable alternative technique to chromating.

关键词： electrodeposition Zn-Ni-SiO2 composite coating silane coupling

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输电线电磁场和人的健康

世界科学 1986年第9期 39-41页

作者： m.Granger morgan ,H.Keeth Florig ,Indira Nair ,David Lincoln ,李荣庆

人门受功频电磁场辐射对健康能否产生严重的不良后果? 首先在美国海军协助下,后来又在美国纽约州的电能研究学会能量研究部和其他单位协助下,一项高质量的、有意义的研究项目已经完成。科研人员仍然不能断定功频(60赫兹)电磁场能否对人... 详细信息

人门受功频电磁场辐射对健康能否产生严重的不良后果? 首先在美国海军协助下,后来又在美国纽约州的电能研究学会能量研究部和其他单位协助下,一项高质量的、有意义的研究项目已经完成。科研人员仍然不能断定功频(60赫兹)电磁场能否对人的健康有严重的影响。短暂地受到甚至较强的电磁场辐射显然对

关键词：电磁场电磁学辐射能电场辐射输电线仔猪电热毯追溯性电力局原子键共价键极低频瑞典北欧剂量用药量说服力动物

Synthesis and Theoretical Study of Intramolecular Hydrogen Bond at Two Possible Positions in Pyrazolo[1,2-b]phthalazine

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Chinese Journal of Chemistry 2012年第4期30卷 779-784页

作者： Yoosefian,m. Raissi,H. Davamdar,E. Esmaeili,A.A. Azaroon,m. Chemistry Department Birjand UniversityBirjandIran Chemistry Department Siastan and Balouchestan UniversityZahedanIran

Properties of dimethyl 3-（alkylamino）-5,10-dioxo-5,10-dihydro-1H-pyraolo[1,20b]phthalazine-1,2-dicarboxy-late and its derivatives were studied by means of ab initio method. NO2 derivative of title compound was synthe- sized and the nature of its intramolecular hydrogen bond （HB） was investigated. Furthermore, the topological prop- erties of the electron density distributions for N--H＇＂O intramolecular bridges were analyzed in terms of the Bader theory of atoms in molecules （AIm）. The electron density （p） and Laplacian （V2p） properties, estimated by AIm calculations, indicated that O＇--H bond possesses low P and positive VZp values which are in agreement with elec- trostatic character of the HBs, whereas N--H bonds have covalent character （V2p〈0）. moreover, steric effect of the t-Bu group on structure and topological parameters of pyrazolo[1,2-b]phthalazine conformers was studied. Fi- nally, the powerful method of Espinosa was used to obtain the H-bond energy.

关键词： pyrazolo[ 1,2-b]phthalazine intramolecular hydrogen bond charge density

Effects of Halloysite Nanotube Reinforcement in Expandable Graphite Based Intumescent Fire Retardant Coatings Developed Using Hybrid Epoxy Binder System

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Chinese Journal of Polymer Science 2018年第11期36卷 1286-1296页

作者： Qandeel Fatima Gillan Faiz Ahmad m.I.Abdul mutalib Puteri S.m.megat-Yusoff Sami Ullah mechanical Engineering Department Universiti Teknologi PETRONAS31750 TronohPerakMalaysia Chemical Engineering Department Universiti Teknologi PETRONAS31750 TronohPerakMalaysiac Department of mechanical Engineering University of Gujrat50700 GujratPakistan

In this study, the effects of halloysite nanotubes （HNTs） reinforcement in expandable graphite based intumescent fire retardant coatings （IFRCs） developed using a polydimethylsiloxane （PDmS）/phenol BA epoxy system were investigated. Intumescent coating formulations were developed by incorporating different weight percentages of HNTs and PDmS in basic intumescent ingredients （ammonium polyphosphate/melamine/boric acid/expandable graphite, APP/mEL/BA/EG）. The performance of intumescent formulations was investigated by furnace fire test, Bunsen burner fire test, field emission electron microscopy （FESEm）, thermogravimetric analysis （TGA）, transmission electron microscopy （TEm）, and Fourier transform infrared analysis （FTIR）. The Bunsen burner fire test results indicated that the fire performance of HNTs and PDmS reinforced intumescent formulation has improved due to the development of silicate network over the char residue. Improved expansion in char residue was also noticed in the formulation, SH（3）, due to the minimum decomposition of char carbon. FESEm and TEm results validated the development of silicate network over char layer of coating formulations. A considerable mass loss difference was noticed during thermal gravimetric analysis （TGA） of intumescent coating formulations. Reference formulation, SH（0） with no filler, degraded at 300 ~C and lost 50% of its total mass but SH（3）, due to synergistic effects between PDmS and HNTs, degraded above 400 ~C and showed the maximum thermal stability. XRD analysis showed the development of thermally stable compound mulltie, due to the synergism of HNTs and siloxane during intumescent reactions, which enhanced fire performance. FTIR analysis showed the presence of incorporated siloxane and silicates bonds in char residue, which endorsed the toughness of intumescent char layer produced. moreover, the synergistic effect ofHNTs, PDmS, and other basic intumescent ingredients enhanced the polymer cross-linking in binder system an

关键词： Polydimethylsiloxane (PDmS) Halloysite nanotubes (HNTs) Intumescent fire retardant coatings (IFRC) Thermogravimetric analysis (TGA) Transmission electron microscopy (TEm)

Doped graphene/carbon black hybrid catalyst giving enhanced oxygen reduction reaction activity with high resistance to corrosion in proton exchange membrane fuel cells

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Journal of Energy Chemistry 2022年第5期31卷 143-153页

作者： Zhaoqi Ji Jianuo Chen maría Pérez-Page Zunmin Guo Ziyu Zhao Rongsheng Cai maxwell T.P.Rigby Sarah J.Haigh Stuart m.Holmes School of Automotive Engineering Harbin Institute of TechnologyWeihai264209ShandongChina Department of Chemical Engineering and Analytical Science The University of ManchesterManchester M139PLUK Department of materials The University of ManchesterManchester M139PLUK

Nitrogen doping of the carbon is an important method to improve the performance and durability of catalysts for proton exchange membrane fuel cells by platinum–nitrogen and carbon–nitrogen bonds. This study shows that p-phenyl groups and graphitic N acting bridges linking platinum and the graphene/carbon black(the ratio graphene/carbon black = 2/3) hybrid support materials achieved the average size of platinum nanoparticles with(4.88 ± 1.79) nm. It improved the performance of the lower-temperature hydrogen fuel cell up to 0.934 W cm^(-2) at 0.60 V, which is 1.55 times greater than that of commercial Pt/C. Doping also enhanced the interaction between Pt and the support materials, and the resistance to corrosion, thus improving the durability of the low-temperature hydrogen fuel cell with a much lower decay of 10 mV at 0.80 A cm^(-2) after 30 k cycles of an in-situ accelerated stress test of catalyst degradation than that of 92 mV in Pt/C, which achieves the target of Department of Energy(mV). meanwhile,Pt/Nr EGO_(2)-CB_(3) remains 78% of initial power density at 1.5 A cm^(-2) after 5 k cycles of in-situ accelerated stress test of carbon corrosion, which is more stable than the power density of commercial Pt/C, keeping only 54% after accelerated stress test.

关键词： Nitrogen doped graphene Low-temperature hydrogen fuel cell Catalyst degradation Carbon corrosion

非嗜酸粒细胞支气管哮喘的病理特征和对吸入糖皮质激素的反应

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中华结核和呼吸杂志 2008年第5期31卷 340-340页

作者： Berry m morgan A Shaw DE 金建敏孙永昌不详首都医科大学附属北京同仁医院呼吸内科 100730

背景和目的：非嗜酸粒细胞支气管哮喘（简称非嗜酸粒细胞哮喘）因对糖皮质激素（简称激素）的反应性较差，很可能是一种重要的临床病理类型，但其气道免疫病理学的特点尚不清楚，通过安慰剂对照研究观察吸入激素的效果亦未见报道。方法... 详细信息

背景和目的：非嗜酸粒细胞支气管哮喘（简称非嗜酸粒细胞哮喘）因对糖皮质激素（简称激素）的反应性较差，很可能是一种重要的临床病理类型，但其气道免疫病理学的特点尚不清楚，通过安慰剂对照研究观察吸入激素的效果亦未见报道。方法：对12例有症状的嗜酸粒细胞支气管哮喘（简称嗜酸粒细胞哮喘）患者、11例非嗜酸粒细胞哮喘患者和10例健康对照，通过诱导痰、支气管活检、支气管肺泡灌洗进行气道免疫病理学分析。

关键词：吸入糖皮质激素嗜酸粒细胞支气管哮喘反应性病理特征支气管肺泡灌洗免疫病理学临床病理类型

Fractionation of Zn,Cd and Pb in a Tropical Soil After Nine-Year Sewage Sludge Applications

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Pedosphere 2010年第5期20卷 545-556页

作者： T.A.R.NOGUEIRA W.J.mELO I.m.FONSECA S.A.mARCUSSI G.m.P.mELO m.O.mARQUES Department of Plant Nutrition Center for Nuclear Energy in AgricultureUniversity of Sao Paulo Department of Technology Sao Paulo State University

A long-term field experiment was carried out in the experiment farm of the Sao Paulo State University,Brazil,to evaluate the phytoavailability of Zn,Cd and Pb in a Typic Eutrorthox soil treated with sewage sludge for nine consecutive years,using the sequential extraction and organic matter fractionation *** 2005-2006,maize(Zea mays L.) was used as test plants and the experimental design was in randomized complete blocks with four treatments and five *** treatments consisted of four sewage sludge rates(in a dry basis):0.0(control,with mineral fertilization),45.0,90.0 and 127.5 t ha-1,annually for nine *** maize sowing,the sewage sludge was manually applied to the soil and incorporated at 10 cm *** samples(0-20 cm layer) for Zn,Cd and Pb analysis were collected 60 days after *** successive applications of sewage sludge to the soil did not affect heavy metal(Cd and Pb) fractions in the soil,with exception of Zn *** Zn,Cd and Pb distributions in the soil were strongly associated with humin and residual fractions,which are characterized by stable chemical ***,Cd and Pb in the soil showed low phytoavailability after nine-year successive applications of sewage sludge to the soil.

关键词：植物有效性热带土壤污水污泥分离方法铅分析锌组分应用州立大学