不同条件下乌桕类可可脂结晶行为之研究

液化后的CTCBE如果在室温下自然缓慢冷却凝固则导致容器以横向力炸裂，而以冷冻方式使之快速冷却固化，则容器完好无损，CB则不会出现类似情况。为了解这一现象与CTCBE结晶行为的关系，拟用X粉末衍射和差示扫描量热法对乌桕类可可脂和天然可可脂在不同条件下的结晶行为进行了研究。结果表明过 冷度和诱导晶核对乌桕类可可脂和天然可可脂的结晶行为有不同的影响。对乌桕类可可脂而言，过冷度对有诱导晶核存在的结晶行为无明显影响，相反对无诱导晶核的结晶行为则有较大影响。天然可可脂则不然，过冷度的变化对有或没有诱导晶核存在的结晶行为均有很大影响；如果过冷度相同，则有或没有诱导晶核存在的结晶行为无太大差异。

A Study on the Crystallization Behavior of Chinese Tallow Cocoa Butter Equivalent and Cocoa Butter under Different Crystillized Conditions

Crystallization behavior of cocoa butter (CB) and Chinese tallow cocoa butter equivalent (CTCBE) are studied using powder X-ray diffraction (XRD) and differential scanning calorimetry (DSC).The results showed that two factors,over cold and nucli attracion,had important influence on the crystallization behavior of CB and CTCBE.Over cold gave a little or a big effect on CBE's behavior when there was not a nucli attraction respectively.However,the case was different to CB.The change of over cold rendered a significant influence on CB's behavior no matter there was nucli attraction or not.There was no important effect of condition on the crystallization behavior of CB if over cold unchanged.