摘要
本文系统地总结了盐水扩散振荡的实验方法、现象、机理、模型、应用及其演变过程,指出了目前该领域研究的种种不足之处,对盐水扩散振荡进一步的发展前景、实际应用提出自己的见解。本文采用不同的电极方法,系统而全面地监测了自制盐水振荡装置内的变化过程,并通过相关分析,得出一些规律性的结论:1)用不同的电极方法监测同一盐水扩散体系,所得时间振荡参数相同而振幅不同,其中用系列成对纯金属电极监测,振幅与纯金属第一电离能与最高电离能之和成正比关系,而复合电极(纯金属电极+参比电极)监测结果与水溶液中纯金属的标准电极电位EO成正比关系;且电极位置与振幅密切向关,指示电极位于水相时所得振幅较指示电极位于盐相时所得振幅大;2)用离子选择性电极分别对同一电解质的正负离子扩散的系列监测表明,两种离子迁移数之差越小振幅越大,非离子型化合物不仅振幅小,且不规则,可见两种离子扩散的协同效应对振荡产生重要影响;对不同电极组成,监测所得振幅大小顺序为: 纯金属(加参比电极)> 一对纯金属电极>离子选择性电极(加参比电极);3)两种不同密度(D)的两种溶液,只有D(上)>D(下)时才会产生振荡,这表明重力在振荡过程中起重要的作用;4)精密温度变化测量和电导率测定结果表明,在盐水振荡过程中亦存在温度与电导率的周期变化。本文通过对加入表面活性剂、乳化剂、乳液的盐水振荡器的研究发现,改进过得盐水振荡器不仅振幅增大,而且使盐水振荡可逆,扩展了盐水振荡的应用范围。实验结果表明,有表面活性作用的物质可以增加盐水振荡的振幅,有络合性能的物质的络合作用是盐水振荡可逆的关键,既有络合作用,又可以起到表面活性剂作用的物质既可以增加盐水振荡的振幅,又可以使盐水振荡可逆。为进一步改进盐水振荡的可逆性、增大振荡产生的电势差,我们将液膜振荡与盐水振荡串联,组成一个复合的振荡器。实验结果发现:耦合后的盐水振荡器振荡产生的振幅增大,由于实验所选的缔合物难溶于水,存于油相,通电后缔合物解离,从而造成反扩散,形成可逆振荡,且可逆程度及逆反应产生的电势差、即振幅大大提高。从而扩展了盐水振荡的应用范围,在二次电池的开发方面有广阔的应用前景。
The phenomena, the mechanism and the mathematical model of the salt-water oscillator were discussed in this paper. Some shortages were brought also and some new opinions of the application were given. Different methods were used to detect widely and systematically the salt-water oscillator designed by us and some rule conclusions were summarized by data’s correlation analysis, as the follows: 1)As different electrodes used to detect the same salt water oscillator, all of the time oscillatory parameters are like, while the amplitude different which proportion the sum of the metal’s first ionization energy and the metal’s highest ionization energy when detected by a series of double metal electrodes. As the multiple electrodes used, the amplitudes are direct ratio to the metal electrodes’ potential EO. In addition, the electrode’s position has great role on the amplitude, that is, the bigger can be gotten when the indicatory electrode at the outer than it at the inner. 2) A series of detections by ionic elect electrodes on the positive/ negative ions of a same electrolyte show that the smaller the difference of the two ionic transference number is, the bigger the amplitude is; and not only the oscillation cure of the non-ionic compound is irregular, but also the amplitude is small. It is obvious that the cooperation of ions play an important role in the salt-water oscillation. And there are such rule of the amplitudes resulted from the different electrodes: the metal electrode (reference electrodes)> a couple of metal electrode>the ionic elect electrode (reference electrodes); 3) Only when the solution density of the inner is bigger than that the outer, the oscillations happen. It means the gravity may have a key effect on the oscillation. 4) The periodic changes of temperature and conductivity in salt-water oscillation were also been found from precision determination. In order to increase the reversibility and the amplitude of the salt-water oscillation, the salt-water oscillation and the liquid membrane oscillation were coupled to create a compound oscillator. The experiment data showed that, after the coupling of the two oscillators, the amplitude were increased largely. And because the coordination dissolved in the oil state but not in the water state, the reversible diffuse was created after the coordination was electrified. At the same time, the amplitude and the oscillation period of the reversible oscillation were increased largely. So the application of the salt-water oscillator, especially in the second battery, was increased also.
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