椰子油在温度梯度场中定向结晶动力学

目的：了解椰子油在温度梯度场中的结晶行为过程，优化结晶参数（如结晶温度、熔点、冷却速率、搅拌速率等），以获得具有特种性能的分提产品。方法：以椰子油为原料，采用分级熔融结晶的方法，考察不同温度梯度场下椰子油的定向结晶行为。结果：Avrami方程可以基本适用椰子油的结晶过程，但在结晶后期，均会出现部分偏离。同时，椰子油结晶过程中，其晶体生长方式以及晶体形状随着温度的不同均会有所变化。结论：温度梯度法可以有效得到所需的椰子油分提产品。

Directional Crystallization Kinetics of Coconut Oil at Gradient Temperatures

This work studied the dry fractionation of coconut oil as a multicomponent mixture by melting and fractional
crystallization. The directional crystallization behavior of coconut oil at gradient temperatures was investigated to optimize
its crystal parameters such as crystallization temperature, melting point, cooling rate and agitation speed. As a result,
products with special properties were obtained. The Avrami equation was generally capable of fitting the crystallization of
coconut oil although some deviations were observed during the last stage of crystallization. In addition, both crystal form
and growth changed with temperature. Thus, effective fractionation of coconut oil can be achieved at gradient temperatures.