Materials Literature
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By using the explosive loading on coarse-grain copper to make it generate severe plastic deformation at high stain rate,the nano-crystalline copper was prepared successfully.The effects of the kinetic energy of impact plate on the strain of copper and the degree of grain-refining were analyzed.The mechanism of grain-r…
Tin-doped indium oxide(ITO) thin films were prepared by DC pulsed magnetron sputtering system at room temperature.The influence of deposition pressure,sputtering power,and O2 flux on the growth rate and electrical-optical properties of deposited films are studied by using stylus profilometer,four-point probe sheet res…
Two-bath process was commonly used for garment reactive dyeing and cellulase finishing,which meant longer cycle and time and energy consuming.Using Megafix B reactive dyes and neutral cellulase in one bath for garment dyeing and finishing,processing time was shortened about 1 h,water and energy consumptions was reduce…
Poly(L-lactic acid-co-1,4-butane diol-co-succinic acid) and poly(L-lacticacid-co-poly(ethylene glycol)-co-succinic acid) were prepared by melt polycondensation.The flexible segment length and the proportion of flexible segment in the PLLA chain were critical parameters influencing the M_n of poly(lactic acid)-based po…
Under the normal temperature,CuI powder was prepared through precipitation and reaction,uniaxial orientation P type semiconductor CuI film was deposited on the glass by Solution-growth method.CuI power and thin film were analyzed by SEM and XRD.The results showed that CuI powder is the sheet structure,crystal film is…
Cerium ions(Ce3+) doped silicate based phosphors were synthesized by a hydrothermal method in stainless-steel autoclave.The crystal structure,morphology and size of the product were characterized using X-ray diffraction and scanning electron microscope.Also,reactions of magnesium strontium silicate(Sr2MgSi2O7) crystal…
A simplified slab model was used to evaluate the effect of Pb content at the Al(100) surface on the chemical potentials and electrochemical dissolution potentials for pure Al and Al-Pb alloys using first-principles density functional theory calculations.Results indicated that the chemical potentials of the surface Al…
The rational processing configuration was explored through trial spinning of T9.4 tex pure polyester sewing thread.The yarn test after quality control of each process shows that the indexes,such as single strength irregularity,weight unevenness,bobbin unevenness,nep count,hairiness and yarn defects,are in line with st…
Through the methods of strengthening lye penetration by weldding scraper inside spherical digister and ways of steam entering,cooking uniformity was improved.The cotton pulp quality was improved.
Targeting at establishing a mathematical model on the relations between the fiber displacement and strain in the twisting processing,a cross-section was intercepted at random.Based on differential method,the plane stress was analysed mathematically,and the stress and strain balance equations of yarn cross-section were…
A die casting die with fast exchange of cores structure was developed for a motor rotor based on analysis on the casting piece.Due to the application of fast exchange of die forming parts structure and a hydraulic cylinder to press the cam driver for the core locking,the serial production of the rotors were achieved.
A glass fiber(GF) reinforced polytetrafluoroethylene(PTFE) composite was prepared by high speed mixing method and cold press and sintering technique.The effects of GF amount on the tensile strength and friction and wear properties of the GF/PTFE composites were investigated.The results indicated that the abrasion loss…
In order to decolorize the lentinan,hydrogen peroxide was used to be reagent for decolorizing it,and the time,temperature,pH as well as mass fraction of hydrogen peroxide were selected to be factors for the experiment of single factor,then the orthogonal test with four factors and three levels was carried out on the a…
The La0.5Pb0.5MnO3 perovskite composite oxides were prepared as the carrier of the 0.5%Pd(mass fraction)/La0.5Pb0.5MnO3 catalyst for the synthesis of diphenyl carbonate(DPC) by co-precipitation method in rotating packed bed.In order to enhance the catalyst activity,polyethylene glycol(PEG) was used as dispersing agent…
The cells of engineered strain HC01 were immobilized in the form of Ca2+-alginate beads. The conditions for immobilization were investigated. The optimal gel concentration and cell concentration were found to be 2.5% and 0.029 g/mL in the presence of 3% CaCl2. The thermo-stability of immobilized cells was 5°C higher t…
Based on the dendrite fragmentation theory by T.Campanella et al,the effects of linear EMS intensity and carbon content and manganese content on dendrite fragmentation consequently results in the columnar to quiaxed transition(CET) of manganese low alloy steel.The conclusions are as follows: The criterion for dendrite…
In order to study the effect of technical parameters on the performance of high density polyethylene (HDPE) plastic welding pieces,with laser permeating a weld HDPE workpiece,mechanical tensile test was carried out and the morphology of the joint fracture was observed with a scanning electron microscopy. Results show…
The structural features of large piercing die for multi-hole and medium plate part were introduced.A type of this large piercing die for a vehicle frame side rail was developed.Some measures to reduce the pressing force and some general design points were described.
Aim Poly(L-lactic acid)(PLLA) polymers have low molecular weight,strong hydrophobicity,poor toughness and poor biocompatibility.Therefore,it is of great importance for biological applications for us to regulate the performances of the PLLA,and further improve its hydrophilicity and blood compatibility by mediating the…
The coupled nanocrystalline ZnO/ZnS was fabricated and immobilized in Nafion membrane by using sodium sulfide (Na2S) as the single anion precursor. The molar ratio of ZnO to ZnS can be controlled by simply adjusting the reaction time. The as-prepared ZnO/ZnS-Nafion samples were characterized by various methods, includ…