Materials Literature
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Functional amphiphilic block copolymers are widely applied in many fields such as targeting delivery,controlled release and molecular recognition due to their unique properties.Synthetic methods of this kind of block copolymers,the assembling mechanism and preparation forms and characterization methods of their micell…
High-efficiency BH ceramic fillers and the development course of high-efficiency liquid distributors were introduced.The application of high-efficiency BH ceramic fillers and high-efficiency liquid distributors in acetylene refining process for the production of PVC could improve the quality of PVC products and prolon…
The principles of foam separation,diffusing separation and their coupling purification have been successfully applied to the coupling purification technology of tara tannin extract solution in industrial scale,which satisfied the requirements of production of tara tannin acid.It was showed that the concentration of ta…
PZT/ZrO2 nanocomposites piezoelectric ceramic were prepared by the improved citrate B-site precursor route.The stress stripes and spots caused by martensitic transformation and thermal mismatch by the ZrO2 particles were found by TEM,and the phenomenon of domain broking and bending by ZrO2 particles was also observed.…
The synthetic processes for block copolymers with polyacrylonitrile(PAN) and their self-assembly in solution were reviewed.Mainly some common radical polymerization methods,including ATRP(atom transfer radical polymerization),RAFT(reversible addition-fragmentation chain transfer) polymerization,NMP(nitroxide radical p…
VO2(B) powder doped with Mo6+ irons was prepared by an hydrothermal method by using oxalic acid as reduction acid,V2O5 as vanadium source,and(NH4)6Mo7O24·4H2O as doped sources.The VO2(B) powder was analyzed by means of XRD,SEM and other methods.The results show that(NH4)6Mo7O24·4H2O has an effect on the microstructure…
With contrast experiments it has been discovered that the content of mixed RE has a great influence on the properties and microstructure of ZL201.With a content of mixed RE reach 0.6%,the microstructure of the alloy changed extremely tiny and the hardness also achieved a very high value while upper this content,the cr…
The effect of ratio of rubber/plastic on the properties of the blends was studied.Compared dynamically vulcanized and unvulcanized technologies,it showed that dynamic vulcanization EPDM/iPB system performanced better than unvulcanized system;when the EPDM/iPB ratio was 60/40 and dynamically vulcanized time was 6 minut…
In this paper,Mercury Intrusion Poresmetry(MIP) and micro-hardness were used to test microstructures of ordinal concrete with different mineral admixtures.The results showed that mineral admixtures are helpful for improving the pore structures and ITZ of ordinal concrete.Compared with single-added additives,multi-adde…
Magnesium has good biocompatibility,biodegradation and proper mechanical properties and thereby has the potential to be used as biomedical materials.In this paper,the merits and shortcomings of magnesium as biomaterials are evaluated.Furthermore,different surface modification technologies,including electrochemical dep…
Al2O3 sol hole sealing coatings were prepared with tetraethyl ortho-silicate(TEOS) as precursor on substrate surface of micro-arc oxided AZ91D magnesium alloy by Sol-gel technology.The thermal properties of xerogel,the composition and morphology of films were analyzed by thermo-gravimetric(TG),X-ray diffraction(XRD)en…
The equivalent elasticity of a material containing periodic circular cavity unit cells is investigated based on equivalent deformation theory.The relationships between the elastic parameters,e.g.,elastic modulus,Poisson's ratio and shear modulus of the material and the diameter of circular cavity in unit cell are fitt…
The samples were prepared using pyrophyllite,titanium dioxide and carbon as raw materials by carbothermal reduction and nitriding reaction.The effect of titanium dioxide addition on the carbithermal reduction and nitridation of pyrophyllite had been investigated by using XRD and SEM.The results show that the main reac…
La0.7Sr0.3MnO3(LSM)cathode materials of solid oxide fuel cells were prepared by three kinds of methods: solid-state process,combustion process and sol-gel method.The as-prepared powder of LSM showed the expected perovskite structure without impurity phases.The electrochemical performance of LSM was investigated by thr…
OBJECTIVE To explore the inhibitory effect of different concentration nano-silvers on bacterial and fungi.METHODS The effect of different concentration nano-silvers on bacteria and epiphyte was observed by minimum inhibitory circularity and minimum inhibitory concentration tests.RESULTS Minimum inhibitory circularity…
Novel carbon tubes have different structures and morphologies from conventional cylindrical carbon tubes,which have particular electrical,mechanical and optical properties,showing good prospect of applications.The research of the preparation and applications of novel carbon tubes has become one of the forefront and ho…
To study the negative sequence capacity of hydro-generator,the 2-D electromagnetic and thermal finite-element models which have considered the damper air-gap between the damper windings and the pole shoe were established based on the theories of electromagnetic and heat transfer.For the rotation of the rotor,an equiva…
In the method of Magnesium chloride-Lime milk of preparation of high purity magnesium oxide,raising the filtering quality and improving the washing effect of the intermediate magnesium hydrate is the key of of the total methodology.In this paper,we research the flocculant effect of magnesium hydrate slurry with a seri…
One Keggin-based complex,[Ag12(L)8(H2O)5](SiW12O40)·6H2O(1)(L=isonicotinate) was synthesized under hydrothermal condition.The complex was characterized by elemental analysis,IR spectra,UV spectra and X-ray single crystal diffraction.The crystal belongs to monoclinic crystal system,space group C2/m with a=1.259 5(2) nm…
The light weight epoxy composites were prepared by adding hollow microspheres.The curing process and the type of used hollow microspheres were determined.The effects of hollow microspheres on density and mechanical properties were investigated.The results showed that the density of the composites first decreased and t…