Abstract: The corrosion cracking of Shielded wire could result in protection equipments and automatic devices failing to work, which seriously affects the normal operation of the grid . Therefore, researching the corrosion of Shielded wire has an important meaning. This article, through measurements of the polarization curve of the shield, researched the corrosion rate of different spray time and treatments, and came to a conclusion that the corrosion resistance after passivated by 823 preservatives is higher than before it.
Abstract: The variation of soft magnetic properties of Sendust powder cores as a function of annealing temperature has been investigated. Toroid-shaped Sendust powder cores were prepared from Fe-Si-Al powder by machine pulverizing and subsequent cold pressing using inorganic insulating layer and organic binders, respectively. The influence of different compaction pressures and various annealing temperature on effective permeability and quality factor was investigated. Sendust powder cores using inorganic salt as insulating layer exhibit high effective permeability ( μe>110) up to 1 MHz, showing excellent frequency stable characteristics and high quality factor (Q>80) at 50 kHz. The optimized annealing temperature is 953K.
Abstract: The patterned ZnO rods were fabricated by the photoresist pattern covered sputtered ZnO film assisted hydrothermal deposition.The ordered ZnO nanorods were prepared by the reaction in sodium citrate and Zinc nitrate solution. The sodium citrate and photoresist hole works together for crystallization vertically to the c axis of ZnO. A UV emission at 395nm and an intense green-blue emission peak at 580nm were observed from the ordered ZnO nanorods which reflect the crystallization of ZnO rods. The influence of different growth reaction times and micro-sized holes on the photoluminescence property and crystal quality of ZnO nanowires arrays were investigated.
Abstract: Poly (butylenesadipate-co-terephalate) (PBAT) was modified by melt grafting glycidyl methacrylate (GMA) in the presence of benzoyl peroxide (BPO) in a Haake mixer; and the various properties of blends of PBAT/thermoplastic starch (TPS) using GMA-grafted PBAT (PBAT-g-GMA) as compatibilizer were investigated. The blends comprising TPS content ranged from 20wt% to 50wt%. Thermal properties and thermal stability were characterized with DSC and TGA, respectively. The morphologic results indicated that the interfacial adhesion of PBAT/TPS blends was improved by PBAT-g-GMA. In comparison with the uncompatibilized blends, the tensile properties of compatibilized blends were significantly enhanced, particularly at a high content of TPS (i.e., 40wt% and 50wt%).
Abstract: A series of varying Cu/Zn ratio Cu-ZnO catalysts prepared by coprecipitation were evaluated for the vapor-phase dehydrogenation of sec-butanol (SBA) to methyl ethyl ketone (MEK) and characterized to investigate the roles of ZnO by X-ray diffraction (XRD), H2 temperature programmed reduction (H2-TPR), N2O chemisorption decomposition. When Cu/Zn was 1:1, Cu-ZnO catalyst exhibited excellent reactivity. The catalytic properties of Cu-ZnO did not completely depend on Cu content and Cu0 surface area, revealing SBA dehydrogenation is a structure-sensitive reaction.
Abstract: Heat shock protein 72 (HSP72) is highly expressed in cancer tissues. Recent studies indicate the possible roles of HSP72 in the development and progression of hepatocellular carcinomas but detailed information is still ambiguous. The aim of the study is to investigate the correlation between clinicopathology and immunolocalization of HSP72 in human hepatocellular carcinoma. Immunohistochemistry demonstrated that HSP72 expression in hepatocellular carcinomas with metastasis was significantly higher than those with non-metastasis. HSP72 expression was significantly associated with the presence of tumor infiltration, lymph node and remote metastasis.
Abstract: ZnS nanocrystals were prepared via chemical precipitation method and characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), ultraviolet-visible (UV-vis) and photoluminescence (PL) spectra. The results indicated that the ZnS nanocrystals have cubic zinc blende structure and diameter is 3.68 nm as demonstrated by XRD. The morphology of nanocrystals is spherical measured by TEM which shows the similar particle size. The photoluminescence spectrum peaking at about 424 nm was due mostly to the trap-state emission, and a satellite peak at 480nm ascribed to the dangling bond of S in the surface of ZnS nanocrystals. The emission intensity of ZnS was enhanced after ultraviolet irradiation, the enhancement of the Photoluminescence intensity was due to the elimination of the surface defects after ultraviolet irradiation, for the growth of the coated shell on ZnS nonacrystals, the Photoluminescence intensity was increased as ultraviolet irradiation time growth, finally tends to be stable for the surface state of nanocrystals steady.
Abstract: In this paper, paraffin/polyurea (PU) phase change microencapsules were prepared through an interfacial polymerization method using composite paraffin with solid/liquid mass ratio 3:7 as core materials, 2,4 toluene diisocyanate (TDI) and ethylenediamine (EDA) as monomers, NP-10 as an emulsifier. It was explored the effect of the monomer mass ratio mEDA: mTDI on the yield of hollow PU microcapsules, and the effect of core/shell ratio on the particle size and coating efficiency and storage-energy performance of paraffin/PU phase change microencapsules. The experimental results showed the PU yield is increasing with the increasing of EDA:TDI mass ratio until 0.5:1,then keeps the constant. Paraffin/PU phase change microencapsules prepared with the core-shell ratio of 2:1 have better performance: the melting point of 28.1°C, the enthalpy of 58.4KJ/Kg, encapsulation efficiency of 87.5%, the average particle size of 4.32μm, and the uniform particle size distribution.
Abstract: Elongation properties of car roof interior fabric were studied in this article.The FM02-11 type universal material testing machine was employed to test the static and dynamic elongation properties of warp knitted napped fabric 1,2,3,warp knitted fabric 1,2,pile composite fabric A1,A2,A3 and sponge composite fabric C1,C2,C3,C4. The results indicated all can meet the general standard for car interior ceiling fabric.According to the dynamic elongation, the bigger the deformation ratio, the better the formability.