正交法研究双嘧达莫微囊的制备工艺

目的 :研究双嘧达莫微囊的制备工艺。方法 :用正交设计法对双嘧达莫微囊的制备工艺进行研究。结果 :用单凝聚法制备双嘧达莫微囊 ,其包裹率与囊心囊材比有显著性差异 (P<0.05) ,而搅拌速度能影响微囊的粒径 ,当囊心囊材比为1∶4、成囊温度50℃、搅拌速度为400r/min时 ,包裹率最高 ,囊径最小。结论 :该法工艺简单、可靠     

壳聚糖-阿司匹林缓释微囊的制备工艺及体外溶出实验

以壳聚糖和阿拉伯胶为囊材,探讨将阿司匹林微囊化的制备工艺及缓释测定。以微囊的药物包封率为制备工艺优化指标,利用复凝聚法,通过正交实验得出微囊的最佳制备工艺条件:壳聚糖浓度为0.6%、成囊pH为4.5、搅拌速度为200r.m in-1、成囊温度为60℃为最佳工艺条件。以最佳制备工艺条件制备含药微囊,重现性好,工艺稳定,同时体外溶出实验表明,该微囊具有较好的缓释作用。     

正交实验设计优化岩白菜素微囊的制备工艺

目的优化岩白菜素微囊的制备工艺,并对制备的岩白菜素微囊进行质量评价。方法以明胶为囊材,单凝聚法制备岩白菜素微囊,通过正交实验设计优化其制备工艺,并对包封率、载药量、平均粒径、体外溶出率进行研究。结果明胶制备岩白菜素微囊的最佳工艺条件为:明胶质量分数为6%,囊心囊材质量比为1∶2,搅拌速度为750r·min^-1。此最佳工艺制备的岩白菜素微囊包封率为75.90%,载药量为23.09%,体外溶出度测定30min为28.6%,12h累计释放达到90%以上。结论以最佳工艺条件制备岩白菜素微囊工艺稳定,包封率高,同时体外释放实验表明,该微囊具有较好的缓释作用。     

荨麻提取物微囊制备工艺的研究

目的：研究荨麻提取物微囊的制备工艺。方法：采用正交设计法对荨麻提取物微囊的制备工艺进行研究。结果：当囊材与囊心的重量比为0．75：0．5，成囊温度为70℃，搅拌速度为600rpm，包囊率、含量、收率较高。结论：该法工艺简单、可靠。     

京尼平苷微囊的制备及体外评价

目的:优选制备京尼平苷微囊的工艺条件.方法:明胶为材料,采用单凝聚法,以包封率为评价指标,利用均匀设计法优选最佳的微囊制备条件.结果:囊心囊材比为1∶12,温度45℃,转速为500 r·min-1.结论:微囊制备工艺稳定、粒径分布及溶出符合要求.     

生姜油微囊的制备及其质量评价

目的:制备生姜油微囊并对其进行质量评价。方法:以辛烯基琥珀酸淀粉钠为囊材,采用喷雾干燥法制备生姜油微囊。以囊材与囊芯的混合温度、囊材与囊芯质量比、搅拌速度为考察因素,包封率为评价指标,采用正交试验优化生姜油微囊的制备工艺,并对其载药量、包封率、外观、粒径分布及光、热、湿稳定性(以碘价、过氧化值为指标)进行评价。结果:生姜油微囊的最优制备工艺为囊材与囊芯的混合温度60℃、囊材与囊芯质量比10∶1、搅拌速度12 000 r/min。最优工艺所制生姜油微囊的平均载药量为17.97%(n=3)、平均包封率为73.57%(n=3),生姜油微囊形态圆整光滑、无粘连、粒径分布均匀,平均粒径为(6.30±0.27)μm,在光、热、湿条件下生姜油微囊碘价、过氧化值变化较小。结论:优化后的生姜油微囊制备工艺简单、重复性好,生姜油微囊的包封率及载药量高,且稳定性较好。     

含ZnS的壳聚糖-阿拉伯胶含药微囊的制备及研究

目的本文以壳聚糖和阿拉伯胶为囊材,利用复凝聚法制备包裹非甾体抗炎药物布洛芬的微囊,引入ZnS纳米,增强其缓控释性能。方法将含乙酸锌的壳聚糖溶液与含Na2S的阿拉伯胶溶液混合,以布洛芬为模型药物,通过复凝聚法制备包裹非甾体抗炎药物布洛芬的复合微囊,以微囊的药物包封率与载药量为制备工艺优化指标,通过L9（34）正交实验得出微囊的最佳制备工艺条件。同时用转篮法在肠液条件下进行体外溶出的测定。结果壳聚糖浓度为0.2%、成囊pH为4.5、成囊温度为45℃、搅拌速度为200 rpm。交联剂戊二醛用量0.6mL,乙酸锌0.05M,硫化钠0.05M为最佳工艺。引入纳米ZnS的微囊比未引入纳米ZnS的微囊及市售的片剂具有更好的缓控释性能。结论引入纳米ZnS离子,并以最佳制备工艺条件制备含药微囊,工艺稳定,具有良好的缓控释作用。     

复凝聚法制备槲皮素微囊的工艺

目的:优选以明胶和阿拉伯胶为囊材制备槲皮素微囊的最佳工艺条件。方法:采用复凝聚法,以槲皮素为囊芯物,用明胶和阿拉伯胶作囊材,取pH、囊材浓度及搅拌速度3个为考察因素,用正交试验探讨制备槲皮素微囊的最佳条件。结果:当pH为4.0,囊材为3%,搅拌速度为150 r.min-1时为最佳工艺条件。结论:本法工艺简便、稳定,具有应用前景。     

喷雾干燥法制备阿司匹林肠溶微囊的实验研究

目的：采用喷雾干燥法制备阿司匹林肠溶微囊,建立质量评价方法。方法：采用丙烯酸树脂Ⅱ号为包衣材料,篦麻油为增塑剂,乙醇为溶剂,阿司匹林为囊心物,将囊材与囊心物按１：２和１：４的比例喷雾干燥制成微囊。结果：经扫描电镜和差示量热扫描法测定表明,微囊包裹形成。囊心物：囊材按１：４较好,微囊能迅速在人工肠液中释放,４５ｍｉｎ释药达到７５％,肠溶片４５ｍｉｎ释药低于６０％。结论：喷雾干燥法制备肠溶微囊,方法简     

裂叶荨麻提取物微囊的制备工艺

目的：研究裂叶荨麻提取物微囊的制备工艺。方法：采用正交设计法对裂叶荨麻提取物微囊的制备工艺进行研究。结果：当囊心、囊材比为0．5：1．25，成囊温度为70℃，搅拌速度为800r·min^-1时，含量及产量较高。结论：该工艺简单，可靠。     

阿司匹林壳聚糖-海藻酸钠微囊处方优化与释药机制研究

目的:制备阿司匹林壳聚糖-海藻酸钠微囊(ACSPM),并研究其处方优化与释药机制。方法:设计正交试验,以包封率为指标优化ACSPM处方并制备微囊,测定其释放度并通过释放动力学模型方程拟合探讨其释药机制。结果:所得微囊大小及含量均匀,最优处方中海藻酸钠浓度、壳聚糖浓度、海藻酸钠与阿司匹林比例分别为3.0%、1.0%、1∶4,体外释放符合Higuchi方程和Peppas方程。结论:该微囊制备工艺方法简单,释药机制以药物扩散为主兼有骨架溶蚀的non-Fickian过程。     

HPLC法测定阿司匹林微囊中阿司匹林的含量

目的 建立检测阿司匹林微囊中阿司匹林含量的高效液相色谱分析法,为定量测定阿司匹林微囊中阿司匹林的含量提供检测手段.方法 用十八烷基硅烷键合硅胶为填充剂,以乙腈:0.1％磷酸为流动相(梯度洗脱:0min:乙腈:0.1％磷酸=10∶90;1 min:乙腈:0.1％磷酸=30∶70),在波长为276nm时进行检测,理论塔板数按阿司匹林峰计算不低于l 500.结果 阿司匹林和水杨酸分别在10～ 100μ g/ml (r=0.999 1)和4～40μg/ml (r=0.9995)浓度范围内呈良好的线性关系,平均回收率为96.91％,RSD=1.69％ (n=6).结论 本法具有简单、准确、灵敏度高的特点,适用于阿司匹林微囊中阿司匹林含量的测定.     

萘普生微囊的制备及其质量考察

目的:制备萘普生微囊并考察其制剂质量。方法:以明胶和阿拉伯胶为囊材,采用复凝聚法将萘普生制成微囊;以阿拉伯胶浓度(A)、萘普生与阿拉伯胶的质量比例(B)和成囊温度(C)为考察因素,包封率为指标设计正交试验优化成囊的最佳制备工艺,并对优化工艺所制得微囊的粒径、包封率、载药量、体外释放性进行考察。结果:最佳工艺条件为A2%、B1:1、C50℃;所制微囊的平均囊径48.92μm,包封率(77.03±1.43)%,载药量(35.31±1.02)%,微囊在48h时体外累积溶出百分率达到91.32%。结论:所制萘普生微囊工艺重现性好、稳定,并具有良好的缓释作用。     

Preparation of uniform microcapsules with silicone oil as continuous phase in a micro-dispersion process

This paper presents an improved solvent evaporation method with silicone oil (PDMS) as the continuous phase for preparation of microcapsules to make more polymer solvents available. A microchannel device was used to produce emulsions instead of mechanical stirring to prepare the mono-dispersed microcapsules. Under the conditions of lower evaporation temperature and shorter evaporation time, uniform polyacrylonitrile (PAN) microcapsules containing Aliquat 336 (ALQ) have been successfully prepared. N,N-dimethylformamide (DMF) with lower evaporation ability was applied as the polymer solvent. The prepared microcapsules have rough surfaces and homogeneously internal structures. By changing the two-phase flow rate, the mean size of microcapsules can be easily controlled. When more ALQ was added in polymer solution, the loading ratio of microcapsules increased. The mass transfer performance and stability were determined by extraction of Cr (VI) ions from its aqueous solution. The mass transfer rate was fast enough. After three times of repeated extraction and stripping, the microcapsules kept almost the same extraction ability, which indicated that the microcapsules have very good stability.     

Preparation of uniform microcapsules with silicone oil as continuous phase in a micro-dispersion process

This paper presents an improved solvent evaporation method with silicone oil (PDMS) as the continuous phase for preparation of microcapsules to make more polymer solvents available. A microchannel device was used to produce emulsions instead of mechanical stirring to prepare the mono-dispersed microcapsules. Under the conditions of lower evaporation temperature and shorter evaporation time, uniform polyacrylonitrile (PAN) microcapsules containing Aliquat 336 (ALQ) have been successfully prepared. N,N-dimethylformamide (DMF) with lower evaporation ability was applied as the polymer solvent. The prepared microcapsules have rough surfaces and homogeneously internal structures. By changing the two-phase flow rate, the mean size of microcapsules can be easily controlled. When more ALQ was added in polymer solution, the loading ratio of microcapsules increased. The mass transfer performance and stability were determined by extraction of Cr (VI) ions from its aqueous solution. The mass transfer rate was fast enough. After three times of repeated extraction and stripping, the microcapsules kept almost the same extraction ability, which indicated that the microcapsules have very good stability.     

左旋多巴微囊制备工艺的研究

目的以乙基纤维素为囊材,优选左旋多巴微囊的制备工艺。方法以微囊的包封率及载药量为评价指标,采用正交实验优选左旋多巴微囊液中干燥法制备工艺条件,并对制备的微囊进行质量检查。结果优选出的制备工艺为:囊材与药量比例为0.6∶1.4,油水相比例为105∶30,PVP量为0.2g,验证实验表明,优化工艺所制左旋多巴微囊的平均载药量为54.94%,平均包封率为89.2%。质量检查结果表明,微囊外观圆整且无粘连现象,大部分微囊的粒径分布在300～600μm范围内。优选出的左旋多巴微囊在体外具有明显的缓释效果。结论采用液中干燥法制备左旋多巴微囊,工艺稳定可靠,操作简便,工艺条件合理、可行。     

Preparation of polysulfone microcapsules containing 1-octanol for the recovery of caprolactam

Polysulphone (PSF) microcapsules containing 1-octanol were prepared with solvent extraction method for the recovery of caprolactam. One-step and two-step processes were, respectively, applied to prepare microcapsules. In order to get high extractant loading, a loading method with the assistance of ultrasound has been developed. With the two-step preparation process the extractant loss can be avoided. A very high extractant loading ratio of 5.96 g g(-1) and the maximum uptake to caprolactam of 65.6 mg g(-1) were achieved. Under the action of ultrasound the extractant loading efficiency is greatly intensified. With the one-step process 1-octanol loading ratio is highly limited. Only 1.74 g g(-1) loading ratio and 29.9 mg g(-1) uptake to caprolactam were realized. Meanwhile the extractant loss in the one-step process is serious. Considering extraction capacity and extractant loss in the preparation process, it is suggested that PSF microcapsules containing 1-octanol should be prepared with the two-step process. To fasten mass transfer rate, microcapsules with relatively smaller size are desired.     

番茄红素-橄榄油微囊的制备及稳定性研究

目的：利用微囊化技术提高番茄红素的稳定性。方法：以明胶和阿拉伯胶为混合壁材,用复凝聚法制备番茄红素-橄榄油微囊,通过电镜扫描和粒径测定法评价微囊的体外特征,并在光照和热破坏条件下考察其稳定性。结果：初步确定微囊制备的最佳工艺：以橄榄油为油相,囊材溶液质量浓度为0．05g·mL^-1,成囊时体系pH值为4．0、温度为45℃;选用高剪切乳化机进行乳化,转速为3000r·min^-1,乳化时间为5min;以冷冻干燥法进行微囊干燥。由此制得的微囊圆整度好,平均粒径约7μm,均匀度为0．0899,包封率为81．8％;在强光（4500h）或高温（60℃）下放置10天,其含量基本稳定。结论：番茄红素-橄榄油微囊制备工艺简易,成品稳定性好,值得进一步研究开发。