Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The synthesis of polyether modified polysiloxane was studied and the best choice of technology was discussed.The synthesis of polyether modified polysiloxane materials during the synthesis ratio,catalyst amount,reaction time and temperature on the synthesis of polyether polysiloxane low conversion rate of hydrogen sil…
Hexabromocyclododecane was synthesized by electrophilic addition reaction of cyclododecatriene with bromine in the mixed solvents of propanol,isopropanol and chloroform.The effects of process conditions on reaction were studied.It showed that the optimum conditions were as follows: m(propanol):m(isopropanol):m(chlorof…
Hydrogen storage alloy composite TiV1.1Mn0.9Ni0.5+20%ZrCr2 was prepared via two-step arc melting method.Microstructure,cycle stability and synergetic effect of the hydrogen storage alloy composite electrode were studied by XRD,energy dispersive spectroscopy(EDS),inductively coupled plasma-optical emission spectrometry…
The inhibitive properties of five kinds of corrosion inhibitors,which contain imidazoline derivative, mannich base,pyridine quaternary ammonium salt,quinoline quaternary ammonium salt and a new fused heterocycle quaternary ammonium salt were studied by means of mass loss of saturated H_2S/CO_2 and dynamic rotating wit…
Guican 7,a new silkworm variety bred from 781.57A×7 532.862 by the incomplete diallel cross method,was identified in door and rural rearing.The results showed that the cocoon yield per 10 000 larvae,cocoon shell weight per 10 000 larvae,cocoon shell rate,cocoon filament length,length of none-broken filament,reelablity…
The characteristics of liquid crystal polymer(LCP) systematically are disussed.Meanwhile,three main producing methods are addressed and superiority is discussed compared with the other conventional packaging substrates.Finally,the recent research progress of LCP film in system-in-package as microwave and millimeter ma…
Magnesium alloy(AZ31B) and Copper(T2) were bonded by eutectic contacting reaction brazing.The microstructural features and mechanical properties of the welded joint was studied by scanning electron microscopy(SEM),energy dispersive spectrometer(EDS).The results show that when the welding process is at 500 ℃ for 5 min,…
As an important inorganic chemical product,high purity magnesium oxide was widely used in various fields of industry.The application of high purity magnesium oxide was introduced briefly,and the condition of the domestic and foreign high-purity magnesium oxide were compared.From the long-term development,the research…
A new water soluble and biodegradable crosslinker of chitosan oligosaccharide-graft-acrylic acid(CSO-g-AA) was synthesized through the acrylyl reaction of amino groups in the chitosan oligosaccharide(CSO) chains with acrylic acid(AA) catalyzed by 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimidehydro-chloride(EDC) and N-…
Cu(120nm)/Ta(5nm)/Ti-Al(5nm)/Si heterostructures were deposited on(001) Si substrates using radio frequency magnetron sputtering method.Microstructure of the samples and barrier performance of Ta(5nm)/Ti-Al(5nm) integrated film were investigated using atomic force microscopy(AFM),X-ray diffraction(XRD),and four probe…
Nanoparticle-modified cermets are attracting extensive attentions for their excellent mechanical properties.The experimental preparation,microstructure and mechanical properties of the nanoparticle-modified cermets are introduced,and the formation of core/rim structure in the cermets is dicussed.The results show that…
4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) fluorescent pH probes are fluorescent sensors and switchers based on photo-induced electron transfer (PET) mechanism. From experimental studies, different substituents on the amino nitrogen are known to result in variable photo sensitivities. Density functional theor…
By adopting the detailed reaction mechanism governing the methane self-heat reforming and through using a numerical simulation method,studied was the self-heat reforming reaction of CH4/O2/H2O Ni-based catalytic agent in straight microchannels.The influence of the constituents of the mixture and the mass flow rate on…
The effects of calcined phosphogypsum on the hydration process of the autoclaved silicate products were investigated in this paper.The influence of adding phosphogypsum calcined at different temperatures on the hydration rate of autoclaved silicate products was analyzed for un-reacted Ca(OH)2 content and combined wate…
A series of novel magnetic microspheres were prepared by inverse suspension crosslinking method from chitosan,β-cyclodextrin and Fe3O4.The obtained magnetic microspheres were characterized by means of optical microscope,IR and VSM.The adsorption behaviour of those microspheres towards papain was investigated.The resul…
Polysaccharides was extracted from Cantharelles cibarius using water as extractant in ultrasonic wave surroundings.Single factor test and orthogonal design method were used to research on effects of extraction time,temperature and solid-liquid ratio on polysaccharides percentage extracted.The optimal extracting condit…
In this paper,cobalt(Co) and tin(Sn)-doped ZnO crystals have been synthesized by hydrothermal method with 6 mol/L KOH as mineralizer,meanwhile,the mixture of SnO2,CoCl2 and ZnO(mol ratio is 0.02:0.5:1) as precursor.The fill factor was 70% and kept the reaction temperature of 430 ℃ for 24 h.Sn-doped has significantly c…
Using boron trifluoride as a catalyst for the polymerization of cyclohexene has been studied.Effect of the initiator,reaction temperature,reaction time,pressure and mass fraction of initiator on the yield of oligomerization products was investigated with different diol initiators.The results showed the optimum conditi…
This paper takes the poly anionic cellulose(PAC) as the thickener for the water-borne polyacrylate coating agent DS 330(PAC must be dissolved in water when used,and the mass ratio is 1:20).It makes use of PAC dehydration and flocculation to destroy the local continuity of the coated film when it forms during baking.A…
New type mixing elements used in the co-rotating,intermeshing twin-screw extruder was discussed.The influence of different screw configuration on mixing effect of PP/BaSO4 composite was analyzed.Use those new type mixing elements to assemble different screw configuration,a type of screw configuration suit to PP/BaSO4…