合成Na5YSi4O12过程中几个晶相性质研究

用固相反应方法合成了Ｎａ５ＹＳｉ４Ｏ１２的纯相样品。用ＸＲＤ及ＳＥＭ研究了合成反应过程，对反应过程的中间状态及组成进行了比较，给出了消除杂相，得到致密纯相ＮＹＳ样品的方法。     

氢氧化钡、氯化锌等产品的生产工艺改进

针对生产氯化钡、硫氢化钠等产品的化工厂的困境，在不做大量投资、不做大的改动、不改变原厂的基础上，提出了改善产品结构、革新生产工艺的方法。原有生产状况是：利用原料硫化钡、盐酸、硫化钠生产氯化钡和硫氢化钠，但氯化钡亏损，整体效益差。改进新工艺为：在原有原料中增加氧化锌，即以粗质氧化锌、硫化钡、盐酸、硫化钠为原料生产氢氧化钡、氯化锌、硫氢化钠，以效益好的氢氧化钡、氯化锌取代了氯化钡，并保存了原来效益好的硫氢化钠，整体效益大大提高。     

Biodegradable blend films based on two polysaccharide derivatives and their use as ibuprofen‐releasing matrices

Differential scanning calorimetry (DSC), FTIR, X‐ray diffraction (XRD), and viscosity methods were used to examine the miscibility, interaction, and degradability of cationic guar gum (GG) and sodium carboxymethylcellulose (NaCMC) in their blend films. The experiment results prove that there exist electrostatic interactions and hydrogen bonding between GG and NaCMC. Blend films degrade quicker than pure GG or NaCMC film. Furthermore, the degradation rate of blend films is related to the interactions between GG and NaCMC. Based on the research of blend films as the drug carriers for Ibuprofen, it is found that the blend composition, initial drug concentration, and pH value affect the drug release and the GG/NaCMC blend films have good sustained release performance. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3553–3559, 2007     

沉淀分离-络合滴定法测量硫化钠含量

介绍了ZnS沉淀分离-EDTA络合滴定法测量工业硫化钠中Na2S含量的原理和方法，并对该方法的准确性和重现性进行了论证．实验结果表明：该方法具有良好的重现性，重复实验的相对标准偏差为0．55％；该方法具有较高的准确性，与碘量法（国标）相比结果相差0．11％，一致性达到99．5％．     

氯化钠对次氯酸钠溶液稳定性影响的研究

以不同浓度的氯化钠作为稳定剂，观察其对含有效氯0．5％的次氯酸钠溶液化学稳定性的影响，实验表明，加入0．6％的氯化钠溶液能显著提高次氯酸钠溶液的稳定性：在75℃敞口情况下放置4h，有效氯仍保留初始浓度的91．73％，而未加氯化钠的对照样本仅保留初始浓度的87．78％；在75℃于密闭容器内放置19h后，有效氯为初始浓度的83．95％，而未加氯化钠的对照样本仅为初始浓度的79．75％。0．6％氯化钠对次氯酸钠溶液的稳定性具有增强作用。     

Hydrogen storage: The major technological barrier to the development of hydrogen fuel cell cars

In this paper, we review the current technology for the storage of hydrogen on board a fuel cell-propelled vehicle. Having outlined the technical specifications necessary to match the performance of hydrocarbon. fue1, we first outline the inherent difficulties with gas pressure and liquid hydrogen storage. We then outline the history of transition metal hydride storage, leading to the development of metal hydride batteries. A viable system, however, must involve lighter elements and be vacuum-tight. The first new system to get serious consideration is titanium-activated sodium alanate, followed by the lithium amide and borohydride systems that potentially overcome several of the disadvantages of alanates. Borohydrides can alternatively produce hydrogen by reaction with water in the presence of a catalyst but the product would have to be recycled via a chemical plant. Finally various possible ways of making magnesium hydride decompose and reform more readily are discussed. The alternative to lighter hydrides is the development of physisorption of molecular hydrogen on high surface area materials such as carbons, metal oxide frameworks, zeolites. Here the problem is that the surface binding energy is too low to work at anything above liquid nitrogen temperature. Recent investigations of the interaction mechanism are discussed which show that systems with stronger interactions will inevitably require a surface interaction that increases the molecular hydrogen-hydrogen distance.     

铝酸钠溶液分解过程表面活性剂在晶种界面的吸附

目的研究四种阴离子表面活性剂和两种非离子表面活性剂在晶种氢氧化铝界面上的吸附行为,探讨铝酸钠溶液种分过程添加剂的复配依据.方法采用紫外可见分光光度计,测定各种表面活性剂的吸附平衡时间及吸附等温线,研究了几种表面活性剂在氢氧化铝界面的吸附规律.结果阴离子表面活性剂随碳链的增长,其临界胶束浓度值相应地减少;表面活性剂的浓度大于临界胶束浓度后,吸附等温线为线性;温度升高会降低阴离子表面活性剂的吸附,而非离子表面活性剂的吸附量增大.结论十二烷基苯磺酸钠、十二烷基硫酸钠、油酸、硬脂酸钠、聚乙二醇和Span80 6种表面活性剂的最佳添加量(CMC)分别为8.62×10-7mol/g、8.66×10-7mol/g、5.38×10-7mol/g、5.54×10-7mol/g、2.17×10-7mol/g和1.82×10-7mol/g,对工业生产中如何配制添加剂具有指导意义.     

中国实验快堆栅板联箱焊接件与钠的相容性

在模拟中国实验快堆运行工况条件下，对用不同来源304不锈钢制造的栅板联箱焊接件进行试验研究，分析和测试在450℃钠中浸泡3000h后焊接件的晶间腐蚀状况及其力学性能变化。试验结果表明：在本试验条件下，焊接件试样的平均腐蚀速率均小于0.9mg/（m_²•h）；焊接件的焊接区及热影响区表面均未出现晶间腐蚀；试验前后，试样的屈服强度、抗拉强度及延伸率均无明显变化。     

硅酸镧镓晶体微天平测定石蜡膜的吸附特性

硅酸镧镓晶体微天平(LCM)是以硅酸镧镓晶体为压电材料研制的新型压电式传感器,对表面质量负载变化有灵敏的频率响应。在LCM表面浇铸石蜡薄膜,实时监测十二烷基苯磺酸钠在石蜡膜表面吸附过程中的质量变化,结果表明:其吸附过程呈现可逆吸附特征,并可以用Langmu ir等温线和动力学模型进行回归分析,获得吸附/脱附速率常数、平衡常数、饱和吸附量等参数,并讨论了盐浓度的影响。     

次氯酸钠在宝钢生活水站应用前景研究

通过对次氯酸钠消毒方式的消毒效果、稳定性及经济性、安全性等各方面的论证,分析了宝钢生活水采用次氯酸钠消毒的优劣,认为采用次氯酸钠消毒,使用安全性有了很大提高,且设备成本大幅下降,但是次氯酸钠水溶液易分解,且运行成本较高。