Materials Literature
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Thiol end-functionalized polycaprolactone(HS-PCL) and amphiphilic poly(ethylene glycol)-b-polycaprolactone (PEG-b-PCL) were synthesized via ring-opening polymerization of e-caprolactone (e-CL) using Novozym 435 (immobilized form of lipase B from Candida antarctica) as biocatalyst,and 2-mercaptoethanol and methoxy poly…
Biocompatible nano-hydroxyapatite/poly(vinyl alcohol)(n-HAP/PVA)blend composition fibers were prepared by mixed-gel spinning.n-HAP particles were modified by silane coupling agent and different content of n-HAP were mixed in PVA uniformly,then n-HAP/PVA blend composite fibers were prepared.HAKKE rheometer was used to…
Considering the curvature effect on hooping of nearest-neighboring carbon atoms of armchair carbon nanotubes(SWNT),the energy band,density of state and velocity of electron of armchair SWNT were analytically derived by using the tight-binding model and Born-Karman boundary condition.Analyzing the electronic properties…
Using classical microcanonical molecular dynamics,the thermodynamical properties of the amorphous cluster of 19 gold atoms are studied by Gupta potential.Through calculating the values of the atomic time average potential in the cluster and the analysis of the instantaneous structures,some new features of the melting…
The article introduce a kind of the new produres which is called a jetting procedure by the rotation of a superspeed.It has many virtues such as applying to the high viscous anticorrosion material.Perfectly being vaporized,coating being even and balanced,coating being strong and heard after being dealt with high tempe…
The three imporant factors of resistance wall,including height(h),clearance(n),gradient(α) influencing on maximum wear loss on flange of finish forging(f) were studied.Furthermore,FEM software Deform3D was applied to simulate the crankshaft finish forming process,and the result was displayed in the form of graph throu…
In order to improve performance and increase the transmissivity and bandwidth of the Glan-Taylor prism,super wide bandwidth antireflection films for 400-1100 nm were designed and evaporated on the Glan-Taylor prism.The data refinement method was used to design multilayers.To improve the adhesion between the coating an…
Semi-solid extrusion parts of hypereutectic high chromium cast iron was prepared by inclined cooling plate rheology extrusion forming process in the paper,in which the effects of extrusion pressure on internal quality of semi-solid extrusion parts was focused.The results showed that,when extrusion force was relatively…
Ba1-xBix(Ti0.91Zr0.09)0.99Al0.01O3 ceramic was prepared by a solid phase reaction.The effect of the Co-doping of Bi3+and Al3+on the phase structure and the dielectric properties of the ceramic has been studied by X-ray diffraction method and Agilent4284A testing analyzer and ZT-I polarization hysteretic loops testing.…
Objective To evaluate the clinical effect of stable vitiligo grafted with autologous epidermal got by blister method or lamellar chip method, whose transplantation bed is grinded by ultra-puls CO2 laser. Methods The clinical effect of 72 cases was observed after grafting with autologous epidermal. There are 37 cases i…
At present,the accuracy is very low in the prediction of fabric diagonal bending rigidity with mathematic model.Several pieces of fabric are selected and their bending rigidity in every 10 degrees from the weft-wise to warp-wise is tested,and prediction of diagonal bending rigidity of the fabrics are carried out by BP…
Conductive polyethylene composite was prepared by mixing HDPE,SEBS,conductive carbon black and carbon fiber etc,and prilling and injection molding.Methods to test the permeabilty and electrochemical corrosion resistance of the conductive plastic were designed.The bulk resistivity of the conductive polyethylene composi…
The synergistic inhibition effect of four rare earth ions(La3+,Ce3+,Ce4+,Nd3+) and vanillin(4-hydroxy-3-methoxy-benzaldehyde) on the corrosion of cold rolled steel(CRS) in 1.0 mol/L H2SO4 solution was studied by weight loss method.The present study revealed that vanillin had a moderate inhibitive effect on the corrosi…
Cinnamon oil was extracted with ultrasound-assisted method.Four different concentrations of cinnamon oil and 1% acid-soluble chitosan composited coating to apply on strawberry surface,and the coated strawberry were packaged with LDPE.The results showed that the composited coating have a better preservation effect on s…
Több mint száz évvel a radioaktivitás felfedezése után a sugárzások biológiai hatására vonatkozó ismereteink még mindig \nhiányosak. Az epidemiológia a közepes és nagy dózisok emberre gyakorolt hatásának tanulmányozásának kiváló eszköze, de a \nkis dózisok tartományában elveszíti hatékonyságát. A kis dózisú sugárzások…
Room temperature cured solvent-free PU waterproof coating was prepared,the effects of process conditions on NCO content in A component were discussed,in addition,the physical and mechanic performance of film coating effected by NCO content in A component,solid filler loading and the kinds and content of catalyst were…
The performance features,usage and technical index of GHSF-30 fluorocarbon emulsion are introduced.The applications of waterborne fluorocarbon paint for aluminum-plastics combined board therefrom are enumerated.
An inorganic polymer flocculants polyaluminum silicate sulfate was prepared using aluminum sulfate,water glass and sodium aluminate as raw materials.The stability of PASS was investigated by gelation time and the change of transparence.It showed that the PASS with the Al/Si molar ratio of 20 and synthesized at 60～80 ℃…
Epoxy modified by a flexible amine(T403) was prepared by casting molding method.The effects of T403 contents on the static and dynamic properties and fracture surfaces of epoxy casts were studied.The relationships between effective average molecular weight of the network chain(Mc) and the mechanical properties of epox…
YZM cylindrical surface bearing is a new kind of railway bridge cast steel bearing.Lost foam casting process has many advantages in producing railway bridge cast steel bearing.The forming mechanism of defects was described by tests and analysis,and the influence of such factors as pattern quality,pouring temperature,c…