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首页> 外文期刊>Journal of Applied Polymer Science >PLLA-silver nanoparticles bionanocomposite membranes: Preparation, antibacterial activity, and in vitro hydrolytic degradation assessment
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PLLA-silver nanoparticles bionanocomposite membranes: Preparation, antibacterial activity, and in vitro hydrolytic degradation assessment

机译：PLLA-银纳米颗粒均多复合膜：制备，抗菌活性和体外水解降解评估

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Silver nanoparticles (AgNp) were synthesized in aqueous phase and transferred to chloroform using a fatty amine as phase transfer agent. Poly(l-lactic acid) (PLLA) membranes were prepared using the "functionalized" chloroform. The amount of AgNp in the chloroform was determined by atomic absorption spectroscopy. Thermogravimetric analysis, differential scanning calorimetry, and field emission scanning electron microscopy were used to characterize the membranes. A decrease of the thermal stability of the membranes was observed upon the addition of AgNp; meanwhile, the polymer crystallinity degree increased, making the membranes more fragile and brittle. The in vitro degradation assessments of the membranes in artificial saliva suggested that the time necessary to degrade the PLLA reduced by raising the concentration of the nanostructures. Additionally, the antibacterial assays demonstrated that the addition of only 13 ppm of AgNp were enough to inhibit the formation of biofilm over the bionanocomposite membranes. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47998.
机译：在水相中合成银纳米颗粒（AgNP）并使用脂肪胺作为相转移剂转移至氯仿。使用“官能化”氯仿制备聚（L-乳酸）（PLLA）膜。通过原子吸收光谱法测定氯仿中的AgNP的量。热重分析，差示扫描量热法和场发射扫描电子显微镜用于表征膜。在添加AgNP时观察到膜的热稳定性的降低;同时，聚合物结晶度提高，使膜更脆弱和脆。人工唾液中膜的体外降解评估表明，通过提高纳米结构的浓度降低PLLA所需的时间。另外，抗菌测定证明，添加仅13ppm的AgNP足以抑制生物膜的形成在均硅皮复合膜上。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47998。

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