Materials Literature
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Chitosan fatty acid salt(L-CTS:chitosan lauric acid salt,N-CTS:chitosan nutmeg salt,S-CTS:chitosan stearic acid salt,here in after referred to as compound salt) were prepared by the interaction of 2 site amino group of chitosan with carboxyl group in fatty acid using crude biodegradable chitosan and fatty acid as raw…
1,3-broethoxyl-calix[4]arene (compound 1) was obtained by reacting p-tert-butylcalix[4] arene with dibromoethane. Then reacting compound 1 with ethanolamine or S-(+)-2-amino- 4-methyl-1-pentanol, calix[4]arene derivatives with amino alcohol segments(compound 2) or chiral amino alcohol segments(compound 3) were prepare…
The water-soluble CdTe quantum dots(QDs) whose surface were negatively charged were synthesized in aqueous solution with thioglycolic acid(TGA),mercaptopropionic acid(MPA) and a certain propotion mixture of them,repectively,and its properties were compared.The results indicated that TGA- MPA(molar ratio was 1∶4) co-st…
In order to construct a new bridged porphyrin compound,a novel covalently linked triazine-porphyrin complexes(Ⅵ,Ⅶ) were synthesized by cyanuric chloride with 5-(4-hydroxyphenyl)-10,15,20-triphenyl porphyrin(Ⅰ) and its copper,cobalt derivatives(Ⅱ,Ⅲ) respectively.The two new triazine-porphyrin compounds were characteriz…
There are many factors which affect the removal rate of nitrogen oxides and sulfur oxides in the reactor energized by dielectric barrier discharge(DBD),such as oxygen content,relative humidity and SO_2 initial concentration in the flue gas.In this paper,SO_2 initial concentration,oxygen content and relative humidity i…
Flow process inside the wall-flow diesel particulate filter(DPF) was described.The unified mathematic and physical equations on channel flow based on Quasi-Steady theory were used for calculation of the total pressure drop to avoid problems of complication and omitting the temperature factor for the Konstandopoulos ex…
Nano-sized Ni particles were first synthesized by chemical method to reduce NiCl2 with NaBH4 in aqueous solution,and then coated with a layer of manganese oxide to form core/shell particles.In order to obtain the superfine and monodispersive particles,a few amount of polyacrylic acid(PAA),as dispersing agent,was added…
Tungsten alloys with different deformation were prepared by swaging technology,and the influence of deformation amount on impact toughness was studied.The fracture surface characteristic was observed and analyzed by SEM.The results show that the tensile strength of large deformation swaged tungsten alloy improves grea…
Control of the microstructure of ceramic materials to make it in a direction of preferred orientation (ie,texture) is an effective way to improve the dielectric and piezoelectric properties of polycrystalline ceramics.Based on the characteristics of the textured process,the templated grain growth process (TGG) of pero…
Magnetocaloric effect(MCE) of LaFe11.2Co0.7Si1.1B0.2alloy with different heat treatment processes(0h,1h,3h,6h,24h,and 72h at 1170℃) was investigated.And the phase distribution and phase structure of some samples were analyzed using SED and XRD.The SED and XRDresults indicate thatα-Fe phase is major phasein the as-cast…
Hydroxyapatite (HAp) was prepared by the hydrothermal method,ClAp and Cu (Ⅱ) ClAp were synthesized by the ion exchange method and then the Cu (Ⅱ) ClAp was deoxidized to the Cu (Ⅰ) ClAp with hydrazine hydrate (N2H4 H2O) and sodium hydroxide (NaOH). The samples were characterized by XRD,IR,XPS and atomic absorption spec…
Heat treatment tecnology of Ti-22V-4Al was investigated by using vacuum furace.The relationship between the cooling rate,microstructure and property has been discussed.The result shows that the property of Ti-4Al-22V alloy wire can meet the requirement through heat treatment by using vacuum furnace.
Objective To study the clinical efficacy of reversed island flap pedicled with nutrient vessels of sural nerve for emergent repairing soft tissue defect of lower leg,ankle joint and foot dorsum.Methods 13 case were emergently repaired with reversed island flap pedicled with nutrient vessels of sural nerve.The flap are…
The research and fabrication processes of dispersion strengthened Cu-based composite have been reviewed with description of the processes of Cr2O3 dispersion strengthened Cu-based composite prepared by internal oxidation in details.Future prospect of the development direction of Cr2O3 dispersion strengthened Cu-based…
Cobalt-based catalysts for Fischer-Tropsch(F-T) synthesis were prepared by wet impregnation with γ-Al_2O_3 as the carrier. The catalytic performances of the catalysts for F-T synthesis were studied in a fix-bed flow reactor. The influence of cobalt sources, calcination temperature, cobalt loadings, reaction temperatur…
The alkaline hydrolysis of 4-nitrophenyl benzoate was studied in the presence and absence of CTAB,SDS and Brij35 surfactants in this paper. The experimental results indicated that CTAB and Brij35 micelles and premicelles strongly catalyzed the alkaline hydrolysis of 4-nitrophenyl benzoate, while SDS micelles and premi…
The development situation and main technique routing of antistatic textile product were illustrated.Based on some common testing technique and method of antistatic textile,our national testing technique and method of antistatic textile were analyzed and discussed.And some technique problem in detail were mentioned and…
The technology of electroless plating Ni-P alloy on AZ31B Mg alloy surface was studied.By SEM,EDS and measuring deposition speed.The results show that the best reduction agent of electroless plating Ni-P alloy is sodium hypophosphite,and the best content of reduction agent is 20 g/L.The plating has good corrosion-resi…
Within the framework of density functional theory(DFT),a free energy function was formulated in terms of modified fundamental measure theory(MFMT) for hard sphere repulsion and statistical mechanic theory with the weighted density approximation(WDA) for polymerization.A chemical potential for ABg hyperbranched polymer…
The samples can be extracted from the diesel engine loaded DPF,respectively before and after the DPF,and the not installed DPF using ELPI(electronic low pressure impactor).The situation of particulate matter emissions,as well as the particle size distributionthe of the number concentration and the mass concentration o…