The CdS nanoparticles with good crystallinity were prepared by hydrothermal method in microemulsion composed of poly oxyethylene lauryl ether/water/ cyclohexane/butanol. The structure and the size of the nanoparticles...The CdS nanoparticles with good crystallinity were prepared by hydrothermal method in microemulsion composed of poly oxyethylene lauryl ether/water/ cyclohexane/butanol. The structure and the size of the nanoparticles were analyzed by TEM and XRD. The UV-Vis optical absorption of the samples was also investigated.The results show that hydrothermal treatment is an effective method to prepare CdS nanoparticles of hexagonal structure at low temperature. The particles were in dimensional uniformity. The diameter of the nanoparticles decreased with the increase of the molar ratio of water to surfactant. The minimum diameter of the nanoparticles prepared in this work was 10 nm. Obvious blue-shift were observed in the UV-Vis absorption.展开更多
目的:制备姜黄素固体脂质纳米粒。方法:微乳法制备姜黄素固体脂质纳米粒。采用伪三元相图法优选微乳三相因素,确定优化条件后,将热微乳分散于冷水中制备固体脂质纳米粒。单因素试验初筛各因素(乳化剂、脂质材料、脂质用量、药脂比、冷...目的:制备姜黄素固体脂质纳米粒。方法:微乳法制备姜黄素固体脂质纳米粒。采用伪三元相图法优选微乳三相因素,确定优化条件后,将热微乳分散于冷水中制备固体脂质纳米粒。单因素试验初筛各因素(乳化剂、脂质材料、脂质用量、药脂比、冷水相温度和微乳保温温度)后,以包封率为指标进行正交试验优化处方,并进行验证试验。结果:65℃下由硬脂酸(油相)、聚山梨酯80(乳化剂)、乙醇(助乳化剂)组成三相,乳化剂与助乳化剂比为1∶4所制得的微乳最佳。固体脂质纳米粒的优化处方为姜黄素投药量为50 mg、硬脂酸的用量为0.5 g、冷水相温度为2℃、微乳保温温度为65℃;所得固体脂质纳米粒的包封率为87.73%、载药量为7.72%、粒径为(156.9±2.2)nm、多分散系数为0.480,平均Zeta电位为-24.8 m V(RSD<2%,n=3)。结论:采用微乳法制备固体脂质纳米粒操作简便、可行。展开更多
SmPO4 nanorods were synthesized by a microemulsion system containing water, cetyltrimethylammonium bromide（CTAB）, cyclohexane, and n-pentanol. Transmission electron microscopy（TEM） was used to characterize the sha...SmPO4 nanorods were synthesized by a microemulsion system containing water, cetyltrimethylammonium bromide（CTAB）, cyclohexane, and n-pentanol. Transmission electron microscopy（TEM） was used to characterize the shape and size of the as-synthesized sample. It was found that ω（molar ratio of water to surfactant） and reactant concentration play an important role in the formation of SmPO4 nanostructures.展开更多
文摘The CdS nanoparticles with good crystallinity were prepared by hydrothermal method in microemulsion composed of poly oxyethylene lauryl ether/water/ cyclohexane/butanol. The structure and the size of the nanoparticles were analyzed by TEM and XRD. The UV-Vis optical absorption of the samples was also investigated.The results show that hydrothermal treatment is an effective method to prepare CdS nanoparticles of hexagonal structure at low temperature. The particles were in dimensional uniformity. The diameter of the nanoparticles decreased with the increase of the molar ratio of water to surfactant. The minimum diameter of the nanoparticles prepared in this work was 10 nm. Obvious blue-shift were observed in the UV-Vis absorption.
文摘目的:制备姜黄素固体脂质纳米粒。方法:微乳法制备姜黄素固体脂质纳米粒。采用伪三元相图法优选微乳三相因素,确定优化条件后,将热微乳分散于冷水中制备固体脂质纳米粒。单因素试验初筛各因素(乳化剂、脂质材料、脂质用量、药脂比、冷水相温度和微乳保温温度)后,以包封率为指标进行正交试验优化处方,并进行验证试验。结果:65℃下由硬脂酸(油相)、聚山梨酯80(乳化剂)、乙醇(助乳化剂)组成三相,乳化剂与助乳化剂比为1∶4所制得的微乳最佳。固体脂质纳米粒的优化处方为姜黄素投药量为50 mg、硬脂酸的用量为0.5 g、冷水相温度为2℃、微乳保温温度为65℃;所得固体脂质纳米粒的包封率为87.73%、载药量为7.72%、粒径为(156.9±2.2)nm、多分散系数为0.480,平均Zeta电位为-24.8 m V(RSD<2%,n=3)。结论:采用微乳法制备固体脂质纳米粒操作简便、可行。
文摘SmPO4 nanorods were synthesized by a microemulsion system containing water, cetyltrimethylammonium bromide（CTAB）, cyclohexane, and n-pentanol. Transmission electron microscopy（TEM） was used to characterize the shape and size of the as-synthesized sample. It was found that ω（molar ratio of water to surfactant） and reactant concentration play an important role in the formation of SmPO4 nanostructures.
