作者：
Tifeng JiaoYuanyuan XingQingrui ZhangLi ZhangMinghua LiuJingxin ZhouFaming GaoHebei Key Laboratory of Applied Chemistry
College of Environmental and Chemical EngineeringYanshan Uni-versityQinhuangdao 066004P. R. China State Key Laboratory of Solid Lubrication
Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000P. R. China Hebei Key Laboratory of Applied ChemistryCollege of Environmental and Chemical EngineeringYanshan Uni-versityQinhuangdao 066004P. R. China Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Colloid and Interface ScienceInsti-tute of ChemistryCASBeijing 100190P. R. China
Solvent played an important role in the formation of calcium phosphate phase of the chitosan/calcium phosphate *** this investigation,ethanolacetic acid mixtures were employed as solvents,and various calcium phosphate...
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Solvent played an important role in the formation of calcium phosphate phase of the chitosan/calcium phosphate *** this investigation,ethanolacetic acid mixtures were employed as solvents,and various calcium phosphate phases,such as brushite,amorphous calcium phosphate,and hydroxyapatite,were introduced into the chitosan/calcium phosphate composites by using in-situ preparation *** results showed that the structures of composite were influenced remarkably by the morphology and the distribution of calcium phosphate *** addition,the bioactivity of composites was governed mainly by the characters of calcium phosphate phases in composites,since calcium phosphate phases could induce the growth of hydroxyapatite coating on the surfaces of *** the surface of chitosanlbrushite composite,the formed hydroxyapatite coating consisted of oriented plate crystallites,which self- assembled into spherical-like *** other calcium phosphate phase was introduced into composites,the polymorphs of hydroxyapatite layer would change *** oriented plate crystallites became bigger,and meanwhile,the self-assembled aggregates became less and *** addition,with the shift of the prior nucleating point,the growth orientation of plate crystallites was transformed.
Low-molecular-weight organogels(LMOG) have been attracting a surge interest in fabricating soft *** the finding of the gelator molecules has been developed from serendipity to objective design,the achievement of the g...
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Low-molecular-weight organogels(LMOG) have been attracting a surge interest in fabricating soft *** the finding of the gelator molecules has been developed from serendipity to objective design,the achievement of the gelator molecules still needs good design and tedious organic *** this paper,we proposed a simple and general mixing approach to get the organogel for nearly all the organic compounds and even soluble nanoparticles without any *** have designed a universal gelator molecule,which forms organogels with more than 40 kinds of organic solvents from aploar to polar *** interestingly,when other organic compounds or even nanomaterials,which are soluble in certain organic solvents,are mixed with this gelator molecule,they can form organogels no matter whether the individual compounds could form organogel or *** method is applicable to nearly all kinds of soluble organic compounds and opens an efficient and universal way to fabricate gel materials.
Water dispersible avermectin-layered double hydroxide nanocomposites were successfully prepared using sodium dodecyl sulfate as surface modifier. Concentrations of sodium dodecyl sulfate and NaCl had important effects...
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Stable silver nanoparticles were synthesized from AgNO3through a simple green route using biodegradable and renewable starch as stabilizing agent. Nanoparticles have been studied for their formation, structure, morpho...
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PVC/nano hydrotalcite (HT)-zinc oxide (ZnO) composite were prepared to reduce the smoke release of rigid poly (vinyl chloride) (PVC) as it's burning. Thermal stabilities of the modified PVC and decomposed products...
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Based on the classical grain growth theory, microstructure evolution during grain growth at different sintering temperature and for different holding time is achieved using computer simulation with modified Monte Carl...
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Based on the classical grain growth theory, microstructure evolution during grain growth at different sintering temperature and for different holding time is achieved using computer simulation with modified Monte Carlo model. The model is verified by the grain growth of porous Al2O3 ceramics in the sintering process. The results show that when the grain growth index was 2.95, the grain growth tendency in the simulation were in good agreement with that in the experiment. The modified Monte Carlo model reflects the physical process of grain growth more reliably.
Solvent played an important role in the formation of calcium phosphate phase of the chitosan/calcium phosphate composites. In this investigation, ethanolacetic acid mixtures were employed as solvents, and various calc...
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Solvent played an important role in the formation of calcium phosphate phase of the chitosan/calcium phosphate composites. In this investigation, ethanolacetic acid mixtures were employed as solvents, and various calcium phosphate phases, such as brushite, amorphous calcium phosphate, and hydroxyapatite, were introduced into the chitosan/calcium phosphate composites by using in-situ preparation process. The results showed that the structures of composite were influenced remarkably by the morphology and the distribution of calcium phosphate phase. In addition, the bioactivity of composites was governed mainly by the characters of calcium phosphate phases in composites, since calcium phosphate phases could induce the growth of hydroxyapatite coating on the surfaces of composites. On the surface of chitosan/brushite composite, the formed hydroxyapatite coating consisted of oriented plate crystallites, which self- assembled into spherical-like crystals. When other calcium phosphate phase was introduced into composites, the polymorphs of hydroxyapatite layer would change greatly. The oriented plate crystallites became bigger, and meanwhile, the self-assembled aggregates became less and smaller. In addition, with the shift of the prior nucleating point, the growth orientation of plate crystallites was transformed.
To study the effect of trace RE on the change of foreign inclusion shape, grain refining and obdurability of Q235B steel, the tested steel samples was refined with the addition of micro-rare earth alloy in a vacuum in...
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To study the effect of trace RE on the change of foreign inclusion shape, grain refining and obdurability of Q235B steel, the tested steel samples was refined with the addition of micro-rare earth alloy in a vacuum induction furnace, and optical microscope, SEM, EDS and image analysis were used to analyze the influence of rare earth element on microstructure and mechanical properties. The results show that, when the RE content was 0~36×10-6 (mass fraction), with the increase of RE content in the sample, the average ferrite grain size was reduced from 24 to 12 μm, and the structure of pearlite was obviously refined. The multi-angular oxide inclusions were changed into ellipsoidal oxide inclusions, and the strip MnS inclusions were changed into spherical inclusions. The mechanical properties of samples were substantially improved. When the RE content was 36×10-6, the yield strength, tensile strength and impact toughness value are 382 MPa, 555 MPa and 172 J/cm2, respectively.
The doping devices with the structure of ITO/NPB/Zn(4-TfmBTZ)2:NPB/LiF/Al are fabricated, where the NPB male fraction in Zn (4-TfmBTZ)2 layer is 0, 5%, 10%, 20%, respectively. The results show that the mole fraction o...
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The doping devices with the structure of ITO/NPB/Zn(4-TfmBTZ)2:NPB/LiF/Al are fabricated, where the NPB male fraction in Zn (4-TfmBTZ)2 layer is 0, 5%, 10%, 20%, respectively. The results show that the mole fraction of NPB in Zn (4-TfmBTZ)2 layer has important effect on the device performance, which contains not only efficiency but also chromaticity and color rendering index. As the NPB mole fraction in Zn(4-TfmBTZ)2 layer in creases gradually from 0 to 10%, the electroplex emission enhances gradually, the device efficiency increases firstly and hten reduces, and the light color becomes grodually from blue white, white to yellow white at the same voltage. When the mole fraction of NPB in Zn(4-TfmBTZ)2 layer is 5%, the device shows the best performance with the color coordinate region of (0.28~0.32, 0.33~0.35) and the color rendering index of 83.3~91.2 at voltage of 6~9 V. The maximum efficiency of this device is 0.87 cd/A.
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