Materials Literature
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OBJECTIVE: To develop a new type of injectable sustained thermosensitive meloxicam hydrogel.METHODS: Injectable thermosensitive meloxicam hydrogel was prepared with chitosan-glycerin-borax as carrier.The influence factors of hydrogel were studied such as preparation temperature,pH value,the ratio of glycerin to chitos…
A review is provided about the research progress of dissolution behavior and mechanism of cellulose in ionic liquids.The dissolving and swelling physicochemical characteristics of cellulose in ionic liquids are summarized.It is pointed out that the dissolution of cellulose in ionic liquids is a kind of direct dissolut…
To introduce the heat treatment function and quench mode of steel wire for cord.The process principle and control main point of patenting and water quench are explained.The fact that steel wire structure after water quench treatment is main sorbite and little ferrite,the ferrite of steel wire structure after patenting…
Al2O3 based nanostructured ceramic coatings were prepared on the surface of magnesium alloy AZ31B by oxyacetylene flame spraying technology.XRD and SEM were used to analyze the composition and morphology of this composite ceramic coating.The thermal shock,compactness,wear properties and corrosion resistance of the com…
The long-term stress accelerating aging behavior of polyamide (PA6) was studied through investigation of creep behavior,mechanical properties,molecular structure and orientation crystallization behavior under varying load and time.The results show that during stress aging at 70 ℃,the creep of PA6 increases rapidly wit…
Titanium-extracted slag is a kind of waste slag after recovering titanium from Pangang BF slag by the method of chlorination,with the fineness modulus of 0.53,real density of 2963 kg/m3,over 3% chloride ions and 10% TiO2,more crystalline minerals,and lower hydration activity.The physical and chemical characteristics a…
In this paper potentiodynamic and potentiostatic polarization curves were used to analyze the cathodic polarization behavior of stainless steel 410 in natural seawater and simulated occluded solution.Weight-loss method was used to obtain the protective effect in simulated occluded solution at different polarizied pote…
In this research,under the assumption of ideal site mixing of F-,Cland OHin apatite,concentrations of HF and HCl in the hydrothermal fluid during the crystal of granodiorite porphyry in Dexing County,Jiangxi Province,China were tested by using electron microprobe,and calculated to be 0.00079 and 0.196 mol/L based on t…
Polystyrene (PS) microsphere prepared by soap-free emulsion polymerization was coated with CeO2 by chemical precipitation. As-prepared samples were analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), field emission scanning electron microscopy (FESEM)…
The conditions that favor the in vitro synthesis of cellulose from tobacco BY-2 cell extracts were determined. The procedure leading to the highest yield of cellulose consisted of incubating digitonin extracts of membranes from 11-day-old tobacco BY-2 cells in the presence of 1 mM UDP-glucose, 8 mM Ca2+ and 8 mM Mg2+.…
To ascertain the nature of gelatinase and its role in the pathogenesis of R.anatipestifer,the enzyme from R.anatipestifer strain AF,was purified and its characterizations were analyzed,including stability for heat,effects of proteases inhibitors and metal ions on its activities and pathogenicity for ducklings.The resu…
Axial thermodynamic performance of braid carbon/carbon(C/C)composites and needle C/C composites is compared.Braid C/C composites comprises the radial rod preform composite,the axial rod preform composite and the fine woven punctured preform composite.Needle C/C composites consist of the whole felt preform composites a…
Foam drilling fluid has some special physical properties.The mathematical model for foam flow and heat transfer in wellbore was established,and the solution method of the model was proposed.In order to analyze the effect of heat transfer on the hydraulic parameters of foam drilling,the numerical calculation was conduc…
Starting from the own characteristics of mortar bolt anchorage body,the research results of reinforcement structures corrosion cracking is used for reference to analysis mortar cracking process caused by bolt corrosion.First,considering the volume expansion process of corroded bolt,the displacement model of mortar inn…
Mullite-cordierite composites with different mullite to cordierite ratios were prepared by an in situ reaction sintering method.First,a cordierite started powder (C powder) and a mullite started powder (M powder) were prepared by mixing kaolin,alumina,and talc based on the theoretical chemical composition of cordierit…
Firstly,the categories of phase change materials used in temperature-adjusting phase change clothes were introduced in this paper;then the processes of preparation of phase change materials used in the titled clothes were described.Finally,the new developing prospect of temperature-adjusting phase change clothes was d…
A new(Bi0.5Na0.5)TiO3-based lead-free piezoelectric ceramics(1-x)Bi0.5(Na0.82K0.18)0.5TiO3-xBiGaO3(BNKT-BGx) was prepared by the conventional ceramic sintering technique.The effect of Bi-based ferroelectrics BiGaO3 on the microstructure,dielectric and piezoelectric properties of BNKT piezoelectric ceramic was investig…
On the basis of qualitative observation of the effect of different content of 22# bonding agents on the fracture propagation process through the in-situ SEM observations,effect of the bonding agents amount on mechanical properties of NEPE solid propellant was quantitatively studied by the process of image processing a…
The statical adsorption behavior of the Rosin-based functional polymer for Cu2+ was studied.The Rosin-based functional polymer was synthesized from glycol maleated rosinate modified acrylic acid and acrylic acid as functional monomer by suspension polymerization method.The results showed that the maximum static satura…
An appropriate control method of guide rolls is a key to a scientific design and a successful 3D-FE simulation of radial/axial ring rolling process.The calculation method of guide rolls locus was presented based on the instantaneous outer diameter.Incorporating this approach,the numerical simulation of radial / axial…