碳酸环己胺用于化工装备气相保护的研究

研究了气相缓蚀剂碳酸环己胺（CHC）用于化工装备保护的可能性。结果发现,CHC只要有饱和蒸气存在就可以提供良好的保护,而一旦脱离其蒸气氛围,即失去对金属的保护作用,并认为CHC属物理吸附型缓蚀剂。试验结果证明,CHC只能用于密闭体系,得出与目前普遍认为CHC可用于经常打开的包装体系相反的结论。     

对降低鞍座边角处环向峰值应力的探讨

本文介绍通过鞍座上垫板的伸出和采用柔性鞍座即能有效地降低鞍座边角处的环向峰值应力。     

In vitro hydrolytic degradation of poly(para-dioxanone) with high molecular weight

The in vitro hydrolytic degradation of high molecular weight poly (para-dioxanone) was studied by examining the changes of weight retention, water absorption, pH value, tensile strength, break elongation, thermal properties, and morphology of high molecular weight PPDO in phosphate buffered saline (PBS) (pH 7.44) at 37°C for 8 weeks. During the degradation, all samples’ weight retention decreased and water absorption increased significantly, whereas hydrolysis rate of PPDO bars varied with molecular weight. Compared with lower molecular weight samples, higher molecular weight PPDO samples exhibited higher hydrolysis rate. The samples’ glass transition temperature (Tg) decreased notably, while the degrees of crystallinity (Dc) increased. The samples almost totally lost their tensile strengths and breaking elongation after 4 weeks of degradation. The results suggested that the stability of PPDO in vitro hydrolytic degradation increased with the increase of molecular weight.     

涂层硬质合金结构及材料的研究进展

涂层硬质合金具有高硬度和优良的耐磨性,延长了其制品的使用寿命.本文主要从材料学角度,综述了涂层结构类型、涂层材料及结构、涂层基体等方面国内外涂层硬质合金的研究进展,联系具体涂镀技术和工艺,对比和讨论了不同类型涂层的物理性能、机械性能和切削性能,并对涂层硬质合金行业的发展进行了展望.     

单片机在自吸式烧嘴梭式窑控制系统中的应用

自吸式烧嘴液化气梭式窑投资少、使用灵活、烧成成本较低,已广泛应用于日用瓷、艺术瓷等生产中.但自吸式烧嘴液化气梭式套难以实现自动控制,靠手工操作很难保证烧成质量.本文自行开发了成本低的单片机,并改装了烧嘴、排烟闸板的传动装置,对自吸式烧嘴液化气梭式窑进行了温度与气氛控制的实验.经过工况实验证明,用单片机实现液化气梭式窑的自动控制是可行的,并取得了较好的控制效果.     

浅谈陶瓷装饰中的色彩运用

简述了陶瓷装饰中色彩与中国画的色彩关系,并强调了色彩在陶瓷创作中的具体运用:处理好色与墨的关系.以及色彩的客观与主观关系.     

Study on corrosion electrochemical behavior of several different coating systems by EIS

Corrosion electrochemical behavior of chlorinated rubber top coating (single-layer), inorganic zinc-rich primer/chlorinated rubber top coating (double-layers) and inorganic zinc-rich primer/epoxy middle paste/chlorinated rubber top coating (tri-layers) in 3.5 wt% NaCl solution was studied by electrochemical impedance spectroscopy (EIS). A series of impedance spectra of the three coating systems during immersion were measured; and their protective properties were compared according to the spectra. The experimental results showed that, the protective properties of the double-layers coating system were even worse than that of the single-layer coating system; and the tri-layers coating system had the best protective properties in the three coating systems; epoxy middle paste had played a very important role for protective properties of the composite coating system.     

Effect of Interfacial Bonds on the Morphology of InAs QDs Grown on GaAs (311) B and (100) Substrates

The morphology and transition thickness (t _c) for InAs quantum dots (QDs) grown on GaAs (311) B and (100) substrates were investigated. The morphology varies with the composition of buffer layer and substrate orientation. And t _c decreased when the thin InGaAs was used as a buffer layer instead of the GaAs layer on (311) B substrates. For InAs/(In)GaAs QDs grown on high miller index surfaces, both the morphology and t _c can be influenced by the interfacial bonds configuration. This indicates that buffer layer design with appropriate interfacial bonds provides an approach to adjust the morphologies of QDs grown on high miller surfaces.     

不同温度下促释材料活化磷矿粉效果的研究

采用连续水浸提、盆栽试验,研究不同温度下两种促释材料活化的磷矿粉磷素动态释放特性及肥效。结果表明：（1）与磷矿粉相比,促释磷矿粉连续浸提水溶性磷累积量显著提高;提高幅度最大的是经加温处理的WZ促释磷矿粉,较未加温处理提高了42．95％,是磷矿粉的2．13倍。表明活化磷矿粉经加温处理能明显促进磷矿粉水溶性磷的释放。（2）促释磷矿粉肥效显著优于磷矿粉,WZ处理效果较佳,加温处理后肥效最佳,不亚于SP。     

Template synthesis and magnetic response of polyaniline/Fe3O4 composite microtubes

Template synthesis technique was employed to prepare magnetic polyaniline (PANI)/Fe₃O₄ composite microtubes using anodic aluminum oxide (AAO) membrane as template. Magnetic microtubes were obtained through in situ polymerization of aniline in the presence of Fe₃O₄ nanoparticles in the microchannels of template. A tubular structure was formed once when aniline was preferentially adsorbed and polymerized on the surface of channels wall. Electron microscope images demonstrated that the shape and size of guest (PANI/Fe₃O₄ composite microtubes) were strictly depended on those of the host (template channels). Magnetic force microscopy images showed that the PANI/Fe₃O₄ composite microtubes possessed reasonable magnetism and the magnetism distribution of microtubes was regular as distribution of template channels. Moreover, the magnetic response and oriented arrangement of PANI/Fe₃O₄ microtubes were fulfilled in the magnetic field. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009