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PLGA nano- and microparticles for the controlled release of florfenicol: Experimental and theoretical study

机译:PLGA纳米和微粒用于弗洛林尼酚的控释:实验和理论研究

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摘要

In this study, PLGA particle systems were studied for the controlled release of florfenicol, a broad spectrum antibiotic used in veterinary treatments. The emulsion-solvent evaporation technique was used for particle preparation. To evaluate the particle size, entrapment efficiency, and drug release behavior, factors such as solvent type, emulsification time and methods, and drug to polymer ratio were investigated. The results showed that the use of ethyl acetate and 2.5 min of ultrasonication or 30 min of homogenization can lead to sub-micron and micron-sized particles, respectively. Sizes between 200-300 nm and 2-3 mu m were obtained for ultrasonication and homogenization procedures, respectively. Entrapment efficiencies were around 20% for all systems and release profiles were size dependent. In addition, a mathematical model was implemented to simulate the florfenicol transport. The model predicts the florfenicol release and takes into account the particle size, polymer molecular weight, and autocatalytic polymer degradation. Simulation results are in good agreement with experimental results. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47248.
机译:在该研究中,研究了PLGA粒子系统,用于弗洛林比的控释,广谱抗生素用于兽医治疗。乳液溶剂蒸发技术用于颗粒制剂。为了评估粒度,夹带效率和药物释放行为,研究了诸如溶剂类型,乳化时间和方法等因素,以及药物与聚合物比例。结果表明,使用乙酸乙酯和2.5分钟的超声波或30分钟的均质化可分别导致亚微米和微米尺寸的颗粒。为超声和均质化程序获得200-300nm和2-3μm之间的尺寸。所有系统的夹紧效率约为20%,并且释放型材依赖于尺寸。此外,实施了数学模型以模拟弗洛芬醇运输。该模型预测弗洛林尼洛酚释放,并考虑了粒度,聚合物分子量和自催化聚合物降解。仿真结果与实验结果吻合良好。 (c)2018 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2019,136,47248。

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