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王学杰 《浙江教育学院学报》2004,(3):41-47
研究了两种聚二茂铁硅烷膜在6种有机溶剂中的循环伏安(CV)行为,讨论了溶剂性质对膜的CV行为的影响.在"好"的溶剂中,电解质完全解离,聚合物膜有适当的溶胀度,膜的CV行为表现为可逆的特征.研究了3种不同离子体积的支持电解质对聚二茂铁硅烷膜的CV行为的影响.电解质阴离子参与膜的CV过程,其体积大小对膜的CV行为有显著影响.大阴离子较难渗透进出膜,膜内迁移阻力大,使膜的CV行为表现为不可逆特征. 相似文献
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非水溶剂和非水溶剂化学的特性及应用进展 总被引:2,自引:0,他引:2
非水溶剂具有水所没有的特性.在非水溶剂中可以得到与在水中不同的反应结果.许多不能够在水中发生的化学反应,在非水溶剂中却可以发生或者向相反的方向进行;非水溶剂在制备无水盐,制备某些异常氧化态的特殊配合物,改变某些反应的速度,改进工艺,提高产率等方面都具有重要的意义。 相似文献
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用5种DFT方法、MP2和HF方法,对甘氨酸和一个水分予之间的相互作用进行了研究,找到了4种稳定结构,均为环状双氢键结构;计算了4种结构的最优化几何参数和结合能,并对结合能进行了基组叠加误差(BSSE)校正.报道了红外光谱、红外强度和振动频率位移.用自洽反应场模型在6—311++g(d,p)基组水平上研究了溶剂效应的影响,结果表明溶剂的极性对络合物的结构以及相对稳定性都有很大影响. 相似文献
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应用电导法测定了HCl在水和甘露醇混合溶剂中的活度系数,讨论了电解质溶液活度系数与温度和浓度的关系. 相似文献
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采用新颖的增黏树脂复配物 ,与适当比例的SBS弹性体及合适的混合溶剂相配合 ,获得一种价廉物美的新型胶黏剂 相似文献
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Aisling Macken 《文物保护研究》2013,58(6):352-362
ABSTRACTThe impact of solvent vapour from two solvents, acetone and industrial denatured alcohol (IDA), commonly used in adhesive reactivation in textile conservation, when applied to artificially soiled silk fabric through either Gore-Tex® or Reemay® membranes for exposure times of either 1 or 3 min, was measured using microscopy and ImageJ to monitor the movement of the solid particulates of the soiling, and Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR) to monitor the movement of the oily components. Analysis using these techniques successfully showed the movement of large particulates through the textile and a decrease in the presence of oil. Analysis with FTIR-ATR showed that the application of solvent vapour by a poultice method produces more than just a surface change and the vapour can penetrate far enough into the fibres to cause a change in the level of oil through the entire textile. The results showed that the solvents and barrier membranes have characteristic differences which impact on the changes on the soiling. The application of acetone produced a greater change in the movement of oil on the front and back of the samples than the application of IDA, while a comparison between the barrier membranes showed a greater change occurring in the level of oil with the use of Gore-Tex® rather than Reemay®. The time of exposure to solvent vapour made little difference to the changes to the textile soiling. Quantitatively significant results were gathered from analysis of the changes in the oil measured with FTIR-ATR, and qualitative changes in the large particulate soiling, demonstrating the potential usefulness of ImageJ open access software in future historic textile soiling monitoring studies. 相似文献