Materials Literature
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ZSM-5(core)/SAPO-5(shell) binary structure composite molecular sieves were synthesized by two-stage varying-temperature syntheses,which includes the lower first-stage temperatures and higher second-stage temperatures.The effect of syntheses conditions on the formation and character of core/shell structure zeolite was…
ZSM-11 and ZSM-5 zeolite molecular sieves were synthesized by the hydrothermal method,and modified ZSM-11 and ZSM-5 type catalysts were prepared by one-step ion exchange.The prepared catalysts were characterized by X-ray powder diffraction,atomic emission spectroscopy with inductively coupled plasma atomization and Fo…
The film formation process of waterborne adhesives,its main influencing factors and mechanism are reviewed in this paper.And the areas to represent opportunities and needs for further study on the film forming process of waterborne adhesives are also put forward.
Against to the bridge surface water proofing concrete internal mixed and external coated with Cement Capillary Crystalline Waterproofing Material(CCCW),the concrete durability of frost resistance,impermeability were experimentally studied,which was compared with common concrete comprehensively.The experiment result in…
As one of the most badly needed medical intermediates,D-hydroxyphenylglycine(D-HPG) is used mainly to produceβ-lactam antibiotics.Enzymatic production of D-HPG is an important method to obtain the pure amino acids from DL-5-substituted hydantoins.It is summarized the microorganisms expressing the key enzymes,factors e…
Based on the cotton carding principle,technical measures to improve dust-removal of carding machine are analyzed.Two main mechanisms to act dust-removal are taker-in and flat plate of the carding machine.Detailed studies and analyses of the factors affecting dust-removal are made in this article based on the processin…
Ce(OH)3 film was prepared on the surface of ZM5 casting magnesium alloy by sol -gel process. The sol-gel Ce(OH)3 film was then sintered to gen-erate CeO, film for improving the corrosion resistance of the Mg alloy. The composition and surface morphology of the sintered CeO2 film were analyzed by means of X - ray photo…
In the solusion of nickel(Ⅱ) with malic acid,a compound of [Ni(mal)(Im)3] is produced and it can be characterized by IR spectra and X-ray diffraction.The complex crystallizes in the orthorhombic,space group P 21/c with unit cell parameters: a = 8.4036(16),b = 8.4820(17),c = 22.320(4),V = 1590.8(5)3,Z = 20.
The structure and mechanical properties of CO_2 corrosion scale formed on X65 pipeline steel in simulated CO_2 corrosion environment in oil field under various flow rates were investigated.XRD and EDS analysis indicate that at static condition,the composition of the scale is(Fe,Ca,Mg)CO_3,while the scale changes to(Fe…
Several advanced biological denitrification processes for treating tannery wastewater were described,and reclamation approaches of solid waste and sludge generated in tanning industry were proposed.Then the feasibility of reusing treated wastewater was analysed.
Objective Through comparing the degradation property of chitosan free-film in different dissolution media to screen dissolution media in vitro suitable for colon-specific delivery formulation by chitosan-coating.Methods Preparing the chitosan into free-film and taking the digestibility and fragmentation as indices,the…
Effect of yttrium and gadolinium addition on corrosion rate of AZ81 magnesium alloy in 3.5% NaCl solution was studied by static weight-loss test.The microstructure of the alloys were observed by optical microscope and the morphologies of corrosion surface were examined with scanning electron microscopy.The results ind…
The paper explicates the research course, technical methods, result and application of glass fiber/P84 compound felt filter materials. On the one hand, the glass fiber/P84 and compound acanthous felt should meet the production requirement of high function and low cost, and but on the other hand, it should meet the req…
The octahedronal and hexagonal nano-Fe3O4 particles were prepared via a weakly magnetic field-assisted oxidative co-precipitation.The X-ray diffraction results show that the as-synthesized product is a well crystallized particle with a spinel structure and high purity.The scanning electron microscope images show that…
The nucleation mechanism of nano-calcium carbonate was introduced briefly. Research status of different shapes of the nano-calcium carbonate, such as spindly, cubiform, catenoid, flaky and bulbiform and their applications in coatings were reviewed.
A nonlinear thermodynamic theory is used to investigate the effect of external stress and composition on the phase diagrams and physical properties of single-domain Pb(Zr1-xTix)O3 (PZT) thin films epitaxially grown on dissimilar cubic substrates. Theexternal stress-misfit strainphase diagrams are constructed for PZT f…
According to PTT molecular structure and properties and through adjusting drying process, spinning temperature, spinnerette holes, draw-winding, as well as texturing parameters, PTT filament was made on the existing PET spinning equipment. The PTT filament met the requirements for weaving application and provided an i…
Introduce the work process of SGMW engine plant head line leak test machine, analysis the miss press issue and repress issuecaused by bad oil gallery seal steel ball conveyor design of head line leak test machine, redesign the oil gallery seal steel ball conveyormechanic apparatus, and give solutions for relative issu…
The feasibility of synthesizing star-shaped poly(lactic acid) by solution polymerization,with stannous octoate as catalyst and multi-hydroxy/carboxy compounds as initiator,was investigated.(Products) were characterized with ()~1H-NMR and DSC analysis.Results showed that star-shaped poly(lactic acid) could be synthesiz…
In this paper,4-chloromethyl benzoic acid and triethyl phosphite used as the starting materials had undergone the Arbuzov reaction and then the Wittig-Horner reaction respectively with methyl 4-formylbenzoate,benzaldehyde,4-tert-butylbenzaldehyde,4-chlorobenzaldehyde and 2,4-dichlorobenzaldehyde to synthesize five sti…