Crystal Growth Mechanisms, Transport Enhanced Crystallization
Crystal Growth Mechanisms, Transport Enhanced Crystallization
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晶体生长机制、传输增强结晶
DOI：
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发表时间：
2009
期刊：
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通讯作者：
María Elena González
中科院分区：
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作者：
D. Schruben;Julien A. Stephanus;María Elena González
许多关于蜡（正烷烃）结晶的文献都与晶体形式和性质、多晶型物和相的内转化有关。许多研究人员使用差示扫描量热法 (DSC) 来研究这些主题，但一些此类 DSC 研究也探讨了相关的动力学问题。由于 DSC 处理的是纯蜡（不含溶剂），因此此类工作必然涉及熔体结晶，而不是溶剂浇铸（或溶液）结晶。我们寻求溶剂浇铸动力学信息以对该过程进行建模。然而，早期研究的表面皿结晶器中的溶剂浇铸结晶是一个复杂的过程，涉及溶剂去除、溶质扩散、动力学元素等传输元素。如果没有动力学和其他信息，综合建模可能是不可能的。我们仍然希望有一个能够预测这一复杂过程的工具。动力学并不重要，因为我们找到了一个伪扩散系数等效参数，其相对直线......
Much of the literature on wax (n-alkane) crystallization has to do with crystal form and properties, intraconversion of polymorphs and phases. Many researchers use differential scanning calorimetry (DSC) to study these topics, but a few such DSC studies have also pursued associated kinetics issues. Because DSC deals with pure waxes (without solvents) such work of necessity involves melt crystallization however and not solvent cast (or solution) crystallization. We seek solvent cast kinetics information for the purpose of modeling that process. However, solvent cast crystallization in a watch glass crystallizer of earlier studies is a complex process that involves transport elements of solvent removal, solute diffusion, kinetics elements, and so forth. Comprehensive modeling may not be possible without the kinetic and other information. Still we desire a predictor of that complex process. Kinetics are not crucial for herein we find a pseudo diffusion coefficient equivalent parameter whose relatively straig...