Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Waterborne polyurethane sand-fixing agent with different contents of soluble starch were prepared via the prepolymer method using toluene diisocyanate(TDI),polyoxypropylene glycol(PPG)as base materials and dimethylol propionic acid(DMPA)as hydrophilic monomer,trimethylolpropane as chain-extending reagent respectively.…
Poly(dimethylsiloxane)-poly(ethylene oxide)(PDMS-PEO) diblock copolymer has been used as template in methylphenylsiloxane(MPS) resin matrix to fabricate porous MPS/PDMS composite.The structure of resulting materials has been characterized by transmission electron microscopy(TEM),nitrogen-sorption measurements and 1H-n…
Pd/C catalysts were prepared by impregnation method and used in dehydrogenation of 1,2,3,4-tetrahydrocarbazole to carbazole.The preparation condition such as pH value,serosity volume and reaction time were optimized by response surface methodology.The optimum condition was attained as follows:pH value 7.86,serosity vo…
Objective To discuss the feasibility of applying self-pulmonary tissue flap(PTF) with internal alloy stent(AS) to reconstruct esophagus.Methods Twelve adult dogs were used in this study.A 4 cm long and 1/2～2/3 circled esophageal wall defect was created in each dog,and alloy stent was put into the esophagus wall,then t…
The optimum conditions for extracting active ingredient of pupa chitin were investigated.Pupa powder was processed by heated treatment in sodium hydroxide solution and hydrochloric acid solution successively.Then,residual protein and inorganic salt content in the extract were measured by UV absorption and dry ashing m…
Using metallographic microscope,XRD,SEM,the optimal balt salt formulation for 45 steel and 35CrMo steel which treated by deep QPQ technology in different salt bath composition were analysed.The results show that the deepest compact compound layer and less porous layer of 45 steel is respectively 61.7 μm and 9 μm under…
A propagation system of Primula maximowiczii in vitro was established by using leaf explants and petiole explants.The results showed that petiole explants has a higher adventitious shoot induction rate.The optimal medium for inducing adventitious shoots from petiole explants was MS+2,4-D 1.0 mg/L+TDZ 2.0 mg/L and the…
The change of physiochemical indexes of artificial pit mud in the first five production turn of Lu-type liquor was investigated.The results showed that moisture content of artificial pit mud increased firstly and then reduced,organic substances kept decreasing gradually,however,pH value and the content of humus,total…
The graphite oxide(GO) was prepared from natural flake graphite by the modified Hummers method,and then the graphene oxide(GOs) was obtained with the help of ultrasonic stripping.The samples were characterized by using SEM,TEM,FT-IR,XRD and TG.The results showed that the graphene oxide was prepared with good stability…
Utilizing the interface between HCl and CCl4,polyaniline(PANI) nanofibers were first prepared by interfacial polymerization with compound oxidant of(NH4)2S2O8 and K2Cr2O7.The influences of the(NH4)2S2O8/ K2Cr2O7 ratio on the PANI conductivity and yield were studied.The results show that with using the compound oxidant…
High undercooling technique is one of the important research fields in solidification science.Ni78.6Si21.4 alloys were undercooled to achieve an undercooling of 318 K with the molten glass denucleation and cycling superheating methods.The solidification microstructure evolution with the initial undercooling(ΔT) and th…
The CO_2 laser welding was used to weld ZK60 magnesium alloy sheets,and the microstructure of different zones in the welded joint,phase compositions of the weld seam and the properties of weld joint were studied.The results show that the obvious partial melted zone appeared in the weld seam of ZK60 magnesium alloy, th…
The distribution and structure characterization of nikel and vanadium porphyrins in Yichang tube-transporting oil residue had been studied.The method of column chromatography separation was used two times.Furthermore,the UV-vis spectroscopy was used to characterize the distribution of metals in different fractions,whi…
The advantage of using magnetostrictive guided wave for online inspection of high temperature pipeline is illustrated.Using MsSR3030R guided wave inspection system,the online corrosion inspection of high temperature pipeline was carried out,and the acquisition progress,analysis and test result were stated.The result s…
It is the base of loom improvement to accurately analyze the law of the tension variation on the rapier loom. The factors of the tension variation including the deformation of the warp yarn on the loom are analyzed, and the tension model of the yarn is set up through analyzing the dynamics of the basic movements. This…
It is water injection pipe column for polyethylene pipe column of the Bohai oil field,nitriding anticorrosion tube.The recent discovery of the original well out of the nitrided tubing wall has more corrosion penetration holes.According to the oil field mining and experimental analysis,the corrosion causes are analyzed…
The microstructure of the alloy specimens which were melted with the impure uranium and pure uranium respectively,and their hydrided specimens were analyzed by OM and SEM,moreover,the composition of the hydrided specimens were studied by SEM-EDS.The results showed that the contents of impurity elements of Fe and C wer…
In-situ compatibilized HDPE/wood fibre(WF) composites were prepared by reactive extrusion.Effects of maleic anhydride(MA) and styrene(St) on mechanical properties and microstructure of HDPE/WF composites were investigated.The results show that the tensile and impact strength of in-situ compatibilized HDPE/WF composite…
Objective:study the influence of step by step solidification to ZY-1、ZY-2 type of silicone rubbers' adhesive strength.Method:Under Constant temperature 80 ℃.The group of Silicone rubber adhesive(Adhesive A) was used for Positive control group.The adhesive strength of different teams between ZY-1 and ZY-2 was measured…
The solidification process of ductile hub casting was simulated with the software of HuaZhu CAE.The foundry process was optimized by simulation and experiment.The shrinkage and porosity of the ductile hub casting were effectively eliminated.Therefore it is indicated that foundry CAE technology can be applied to evalua…