试验旨在探究斑蝥黄微胶囊产品制备的优化工艺参数。通过单因素试验,分析溶剂类别、溶解温度和时间以及微胶囊包埋壁材、乳化剂等因素对微囊化斑蝥黄产品的影响,确定了斑蝥黄最佳溶解工艺条件、微囊化最佳包埋壁材与乳化剂;然后通过正...试验旨在探究斑蝥黄微胶囊产品制备的优化工艺参数。通过单因素试验,分析溶剂类别、溶解温度和时间以及微胶囊包埋壁材、乳化剂等因素对微囊化斑蝥黄产品的影响,确定了斑蝥黄最佳溶解工艺条件、微囊化最佳包埋壁材与乳化剂;然后通过正交试验分析,针对产品感观质量和稳定性等因素,得出了合理的微囊化斑蝥黄10%冷水溶性(Cold Water Solubility,CWS)产品配方。结果表明:最佳工艺条件是以二氯甲烷作溶剂,溶解温度50℃,瞬时溶解时间少于5 min,且斑蝥黄与二氯甲烷的最佳比值为12∶135。斑蝥黄微囊化过程中最佳包埋壁材为木质素磺酸盐,最佳乳化剂为抗坏血酸棕榈酸酯;产品配方为斑蝥黄12%、DL-α生育酚4.5%、抗坏血酸棕榈酸酯3.5%、大豆磷脂3.0%、木质素磺酸盐35%、麦芽糊精22%、玉米淀粉20%。“瞬时溶解、二次乳化和均质、双重包埋”技术的应用可在很大程度上提高斑蝥黄微胶囊产品的稳定性、水溶性、安全性以及生物利用率。展开更多
为降低工业六硝基六氮杂异伍兹烷(CL-20)的机械感度,增强其工艺适应性,提高使用安全性,通过超声分散处理工艺、湿法粉碎工艺以及高剪切分散乳化工艺分别制备了球形化CL-20,采用扫描电子显微镜(scanning electron microscope,SEM)、X射...为降低工业六硝基六氮杂异伍兹烷(CL-20)的机械感度,增强其工艺适应性,提高使用安全性,通过超声分散处理工艺、湿法粉碎工艺以及高剪切分散乳化工艺分别制备了球形化CL-20,采用扫描电子显微镜(scanning electron microscope,SEM)、X射线衍射(diffraction of X-rays,XRD)、激光粒度仪、差示扫描量热仪(differential scanning calorimeter,DSC)对处理前后CL-20的形貌、晶型、粒度、热分解等性能进行了测试,采用GJB 772A—1997方法测定了机械感度。结果表明:采用三种工艺方式制备的CL-20粒度减小,表面圆滑;处理前后晶型不变,均为ε型;处理后的CL-20机械感度降低;采用高剪切分散乳化工艺制备的球形化CL-20分解温度较原材料降低6.59℃,而其他两种方法制备的CL-20分解温度无明显变化;采用超声分散处理后的CL-20粒度为60~80μm,采用湿法粉碎工艺处理后的CL-20粒度为15~20μm,采用实验室高剪切分散乳化机粒度可达到10μm以下;三种工艺处理时间分别为150~180 min、45~60 min、20~30 min。展开更多
Based on the insight into the mechanism of phase inversion emulsification in the presence of curing agents, a new method called surfactant free phase inversion emulsification was proposed to prepare epoxy resin waterb...Based on the insight into the mechanism of phase inversion emulsification in the presence of curing agents, a new method called surfactant free phase inversion emulsification was proposed to prepare epoxy resin waterborne dispersions. The waterborne particles are in sub micron range with narrow size distribution. Transparent cured films could be formed from the dispersions even at ambient temperature. The stability of the dispersions could be enhanced by post polymerization at a high temperature for some time. The knowledge about the phase inversion and the stability of the waterborne dispersions might provide a new way to enhance oil recovery.展开更多
文摘试验旨在探究斑蝥黄微胶囊产品制备的优化工艺参数。通过单因素试验,分析溶剂类别、溶解温度和时间以及微胶囊包埋壁材、乳化剂等因素对微囊化斑蝥黄产品的影响,确定了斑蝥黄最佳溶解工艺条件、微囊化最佳包埋壁材与乳化剂;然后通过正交试验分析,针对产品感观质量和稳定性等因素,得出了合理的微囊化斑蝥黄10%冷水溶性(Cold Water Solubility,CWS)产品配方。结果表明:最佳工艺条件是以二氯甲烷作溶剂,溶解温度50℃,瞬时溶解时间少于5 min,且斑蝥黄与二氯甲烷的最佳比值为12∶135。斑蝥黄微囊化过程中最佳包埋壁材为木质素磺酸盐,最佳乳化剂为抗坏血酸棕榈酸酯;产品配方为斑蝥黄12%、DL-α生育酚4.5%、抗坏血酸棕榈酸酯3.5%、大豆磷脂3.0%、木质素磺酸盐35%、麦芽糊精22%、玉米淀粉20%。“瞬时溶解、二次乳化和均质、双重包埋”技术的应用可在很大程度上提高斑蝥黄微胶囊产品的稳定性、水溶性、安全性以及生物利用率。
文摘Based on the insight into the mechanism of phase inversion emulsification in the presence of curing agents, a new method called surfactant free phase inversion emulsification was proposed to prepare epoxy resin waterborne dispersions. The waterborne particles are in sub micron range with narrow size distribution. Transparent cured films could be formed from the dispersions even at ambient temperature. The stability of the dispersions could be enhanced by post polymerization at a high temperature for some time. The knowledge about the phase inversion and the stability of the waterborne dispersions might provide a new way to enhance oil recovery.
