环境友好的溶剂型脱漆剂的研究进展

阐述了脱漆剂的发展趋势,侧重介绍了水性脱漆剂、乳液型脱漆剂和低毒低挥发性脱漆剂的配方及优点,并对环保型脱漆剂的发展前景提出了展望。     

多孔陶瓷材料的的研究现状及应用

概述了多孔陶瓷的形成机理,介绍了多孔陶瓷的成孔方法及特点,并详细概述了多孔陶瓷的制备工艺,具体阐述了各种方法的特点,指出了多孔陶瓷的现状和需要解决的问题.     

环境友好的溶剂型脱漆剂的研究进展

本文阐述了脱漆剂的发展趋势,侧重介绍了水性脱漆剂、乳液型脱漆剂和低毒低挥发性脱漆剂的配方及优点,并对环保型脱漆剂的发展前景提出了展望。     

过氧化物固化的不饱和聚酯粉末涂料的研制

合成了端基封闭型柔韧性不饱和聚酯树脂，研制了相应的过氧化物固化的不饱和聚酯粉末涂料，讨论了树脂合成及固化对粉末涂料的影响，保持了粉末涂料的装饰性能及耐候性能，改善了粉末涂料的柔韧性能。     

合成氨的生产工艺的现状及发展趋势

本文主要介绍了合成氨技术发展历程和基本状况，分析了生产过程中采用的典型工艺及其技术特点与经济性，指出了合成氨技术可能的发展趋势。介绍了高油价下合成氨的原料结构变化及相关技术进展，认为未来合成氨技术进展的主要趋势是大型化、低能耗、结构调整、清洁生产、长周期运行。     

新财税制度的实施对税利的影响

１９９４年实行新税制后产品税改为增值税，开征了矿山资源补偿费，修改了城建税和教育费附加，取消了特种基金，降低了所得税税率。实行新税制后成本提高使利润减少，另一方面使部分利润转化为税金，还使利息进成本、增加了税后利润。     

含有芘基团的电致发光材料的研究进展

综述了近几年芘的衍生物在有机电致发光中的研究情况,展示了一些新结构并做了分析,总结了含芘基团电致发光材料的优点和缺点,并指出了芘的衍生物在有机电致发光材料中的应用前景。     

用于氮氧化物处理的填料塔的设计

选用填料塔对草酸生产过程中产生的氮氧化物进行吸收处理。对填料塔本体进行了设计计算,结合已有的工程设计经验给出了确定填料塔本体尺寸的具体步骤,并讨论了设计应考虑的主要问题。所采用的工艺有效地降低了生产过程中氮氧化物的排放,降低了生产成本,减少了环境污染。     

酶的固定化及在生物传感器的应用

简要介绍了传统的酶固定化方法,对这一领域的新进展进行了综述.对酶生物传感器在食品分析、环境监测、医学和军事上的应用作了介绍,并对其发展前景进行了展望.     

基于单片机的生物质热风炉控制器的设计开发

为了使生物质热风炉在运行中能够更节能更环保,同时成本更低,在综合分析了当前的生物质热风炉控制器的优缺点,设计了一款新型的生物质热风炉控制器,该控制器采用了更先进的GD32单片机和显示效果更好、成本更低的LCD断码屏,优化了锅炉的各种风机的控制方式,增加了智能化的功能,降低了整机的成本。通过现场测试和长期运行测试,该控制器实现了生物质热风炉在运行中更节能更环保的目标。     

底座连接口特征参数对显示器后壳注塑质量的影响分析

在Moldflow分析软件的基础上,对显示器后壳进行仿真研究,以翘曲变形量为质量指标,结合控制变量法进行单因素变动实验,保持注射工艺参数不变,研究显示器后壳底座连接口对制品翘曲变形的影响.对数据进行图表分析,结果表明显示器后壳尺寸定位68.58 cm(27英寸)时,底座连接口选用圆形,连接口位置距离底边26 mm,尺寸...     

浅谈设备的性能与操作对胎面压出质量的影响

简要介绍了胎面压出的工作原理及工艺过程，对设备的配置及操作对胎面压出质量的影响进行了分析，并对压出过程中常见的质量缺陷、造成的原因以及解决措施提出了自己的见解。     

The role of the symmetry and the flexibility of the anion on the characteristics of the nanostructures and the viscosities of ionic liquids☆

The transport properties of ionic liquids (ILs) are crucial properties in view of their applications in electrochem-ical devices. One of the most important advantages of ILs is that their chemical–physical properties and conse-quently their bulk performances can be well tuned by optimizing the chemical structures of their ions. This will require elucidating the structural features of the ions that fundamentally determine the characteristics of the nanostructures and the viscosities of ILs. Here we showed for the first time that the“rigidity”, the order, and the compactness of the three-dimensional ionic networks generated by the anions and the cation head groups determine the formation and the sizes of the nanostructures in the apolar domains of ILs. We also found that the properties of ionic networks are governed by the conformational flexibility and the symmetry of the anion and/or the cation head group. The thermal stability of the nanostructures of ILs was shown to be con-trolled by the sensitivity of the conformational equilibrium of the anion to the change of temperature. We showed that the viscosity of ILs is strongly related to the symmetry and the flexibility of the constitute ions rather than to the size of the nanostructures of ILs. Therefore, the characteristics of the nanostructures and the viscosities of ILs, especially the thermal stability of the nanostructures, can be fine-tuned by tailoring the symmetry and the conformational flexibility of the anion.     

Investigation of the effects of fatty acids on the compressive strength of the concrete and the grindability of the cement

In cement industry, a great energy consumption has been observed during grinding of clinker. To reduce this consumption, some waste products have been used as grinding aids.In this investigation, the effects of sunflower oil (SO), oleic acid (OA), stearic acid (SA), myristic acid (MA) and lauric acid (LA) on the fineness and strength of the cement have been examined. These aids were added into clinker in certain ratios based on the cement clinker weight and the grinding has been done for a definite time at the same condition.All of the fatty acids used increased the fineness as compared with the cement without the grinding additives. SO and OA decreased the strength significantly, LA decreased it to a lesser extent and SA increased it definitely according to the common cement. But MA did not alter the strength of the cement as much as SA. In addition, the covering of the balls influences the grinding of cement clinker unfavourably.     

煤粉流动性对GSP气化炉气力输送的影响研究

针对GSP气化装置煤粉气力输送在试车阶段出现的煤粉锁斗下料不畅、发料罐输送性能不佳等问题,从原料煤性质和工业装置的改进方面出发,通过煤粉的流动性参数的测量与研究,分析出现上述工程问题可能的内在原因,并提出工业装置改进方法,为保证GSP煤粉气力输送工业装置的正常运行提供解决办法。     

Effect of the drafting force on the strength of the bottom of the spinneret

In spinning basalt fibres, the drafting force is in the same range as in spinning of glass fibres. The effect of the drafting force can not be considered in the calculation for the strength and rigidity of the bottom of the spinneret. __________ Translated from Khimicheskie Volokna, No. 5, pp. 47–50, September–October, 2007.     

Effect of the density of the electronic states at the valence orbital of the bridge redox molecule on the dependence of the tunnel current on the overvoltage in the case of fully adiabatic electron transition

Effect of the density of the electronic states at the valence orbital of the bridge redox molecule on the dependence of the tunnel current on the overvoltage and on the width at half maximum of the current-overvoltage curve is studied. A number of the approximate expressions for the density of states, the tunnel current and the width are obtained in the fully adiabatic limit for different particular cases. It is shown that at small values of the coupling of the electronic levels of the electrodes with the valence orbital of the redox molecule and the small values of the bias voltage two regions of the reorganization Gibbs energy exist with different dependence of the width on the reorganization Gibbs energy. The results of calculations of the density of states, the tunnel current and the width are presented and used for the interpretation of the experimental data [N.G. Tao, Phys. Rev. Lett. 76 (1996) 4066, I. Visoly-Fisher, K. Daie, Y. Terazono, C. Herrero, F. Fungo, L. Otero, E. Durantini, J.J. Silber, L. Sereno, D. Gust, T.A. Moore, A.L. Moore, S.M. Lindsay, PNAS 103 (2006) 8686].     

转子挤压组合凹模的应力分析

组合凹模的应力分析是一个非常复杂的问题，对其进行精确分析是解决模具寿命的关键。本文采用有限元分析软件Ansys对转子的组合凹模进行了分析，为转子组合凹模的优化设计提供了依据。     

煤的溶胀处理对药用腐植酸提取的影响研究

以气煤、肥煤、焦煤、瘦煤为样煤,进行了样煤的粉碎、有机溶剂溶胀和硝酸氧化处理,考察了处理后煤样中的药用腐植酸得率。结果表明,吡啶和N,N-二甲基吡咯烷酮是溶胀较好的溶剂;样煤粉碎后,随着粒度的减小,煤的溶胀率增加;粒度粉碎至200目的气、肥煤经吡啶溶胀和硝酸氧化后,煤样的药用腐植酸得率可达到73.0%和71.4%,而经甲醇溶胀和硝酸氧化的200目气煤药用腐植酸得率为56.4%和58.4%。实验结果表明,煤样经过溶胀和硝酸氧化处理,对药用腐植酸的提取有促进作用。     

微通道内流体流动对聚酰胺微胶囊壁面褶皱的影响分析及应用

流体流动诱导微胶囊膜起皱和变形是一个普遍存在的现象。针对这一现象已有一些模拟和实验研究,但是对于微通道内不同因素对于微胶囊褶皱情况的影响以及褶皱的存在对于微胶囊实际膜面积和粒径的影响等方面却鲜有探讨。针对这一问题,本文制备了具有褶皱膜的聚酰胺微胶囊,并提出通过溶剂浸泡法将微胶囊膜褶皱伸展开,以分析微胶囊的实际膜面积和实际粒径。同时,定义了褶皱度的概念,将抽象的褶皱情况数值化,使分析更为方便。最终,通过研究分析发现,由于与流体剪切力正相关,流体流量和黏度的增大会导致微胶囊褶皱度增加;当这两者固定时,微胶囊粒径的改变对其褶皱度基本无影响。在应用方面,微胶囊壁面褶皱情况的分析为制备单核双壁式微胶囊提供了一种新思路。