摘要
目的 :考察不同粒径黄连粉体吸湿性变化情况。方法 :采用 2 5℃ ,相对湿度为 75 %条件下测定黄连常规粉体、超微粉体和纳米粉体的吸湿速率与吸湿百分率 ,并根据 2 5℃不同湿度条件下的吸湿平衡曲线测定其临界相对湿度。结果 :黄连纳米粉体与超微粉体吸湿速率与吸湿百分率均高于黄连常规粉体 ,其中黄连纳米粉体表现得更加明显。黄连常规粉体、超微粉体和纳米粉体的临界相对湿度分别为 72 3%、72 0 %和 71 4 %。结论 :黄连常规粒体经超微化和纳米化后可引起其吸湿性改变。
Objective To observe the humidity absorption of different particle size of Rhizoma Coptidis.Methods The humidity absorption rate and the humidity absorption percent in normal powder,ultra-micro powder and nanometer dimension powder were determined on condition of 25℃ and 75% humidity absorption.Then its critical relative humidity can be determined by the balance curve of humidity absorption during the different humidity condition at 25℃.Results The humidity absorption rate and the humidity absorption percent in ultra-micro powder and nanometer dimension powder are higher than that in the normal powder.The critical ralative humidity in normal powder,ultra-micro powder and nanometer dimension powder are 72\^3%\,72\^0% and 71\^4% respectively.Conclusion The humidity absorption was changed with its particle size.
出处
《中国实验方剂学杂志》
CAS
2004年第3期5-7,共3页
Chinese Journal of Experimental Traditional Medical Formulae
基金
国家中医药管理局资助课题 (No .0 2 - 0 3ZP1 4 )
关键词
黄连
纳米粉体
吸湿性
临界相对湿度
Rhizoma Coptidis
nanometer dimension powder
Humidity absorption
critical relative humidity
