摘要
介绍了夹带剂在超临界CO2萃取中的作用和原理,分析了夹带剂分子极性、相对分子质量、分子体积及特殊分子结构等性质对超临界CO2萃取的影响,总结出夹带剂性质对萃取率的变化规律:夹带剂的分子极性越大,溶质在超临界CO2中的溶解度越大;夹带剂的相对分子质量、分子体积的增大,其在超临界CO2中的溶解度减小,萃取率减小;夹带剂中易形成氢键的特殊分子结构,可提高萃取率。
The effect and principle of the modifiers on the supercritical CO_2 extractionwere introduced and the impact of the property of modifiers(molecular polarity?molecular weight?molecular physical volume)on the supercritical CO_2 extraction were analyzed.The profile of extraction yield against property of the modified can be summarized as:The higer the polarity of the modifier,the higher solubility of solute in supercritical CO_2.Increase of molecular and/or molecular physical volume will result-in decreasc of solubility of solute in supercritical CO_2 and consequently the decrease of the extraction yield.In case the modifier contains special molecular structure that facilitates the formation of hydrogen bond,the extraction yield will increase.
出处
《日用化学工业》
CAS
CSCD
北大核心
2004年第1期40-43,共4页
China Surfactant Detergent & Cosmetics
