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Design and in vitro investigation of nanocomposite hydrogel based in situ spray dressing for chronic wounds and synthesis of silver nanoparticles using green chemistry

机译:基于纳米复合水凝胶的原位喷雾敷料的慢性伤口设计和体外研究及绿色化学合成银纳米粒子

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摘要

An innovative concept of spontaneous film dressing has been designed as sprayed hydrogel dressings (SHD) using a blend of polyvinyl alcohol (PVA) and sodium alginate (SA) as synthetic and natural polymeric components and, were crosslinked with boric acid and calcium chloride, respectively. Silver nanoparticles (AgNPs) are synthesized by green chemistry using Ficus benghalensis extract (FB) and were characterized by SEM and zeta sizer. FTIR spectra show polymeric interaction with AgNPs, while SEM images show outer surface of the SHD film. Equilibrium swelling and degradation in aqueous media (distilled water and buffers) are found to be dependent upon PVA/SA ratio. Polymeric combination exhibit pseudoplastic behavior with Farrow's constant > 1. Uniformly distributed AgNPs (particle size approximate to 27.55 +/- 2.01 nm), high water retention (approximate to 13 fold), and biodegradable (approximate to 5 days) nature of dressing along with sustained release profile of both AgNPs and extract with concentration-dependent antimicrobial activity have been observed for 24 h. Self shaped, biodegradable, aseptic, prolong anti-oxidative, non-hemolytic, blood compatible, and hemostatic properties of SHD film appears as promising dressing for superficial wounds. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43260.
机译:自发膜敷料的创新概念已被设计为使用聚乙烯醇(PVA)和海藻酸钠(SA)的混合物作为合成和天然聚合物组分的喷雾水凝胶敷料(SHD),分别与硼酸和氯化钙交联。使用孟加拉榕榕提取物(FB)通过绿色化学合成了银纳米颗粒(AgNPs),并通过SEM和Zeta粒度分析仪对其进行了表征。 FTIR光谱显示与AgNPs发生聚合物相互作用,而SEM图像显示SHD膜的外表面。发现在水性介质(蒸馏水和缓冲液)中的平衡溶胀和降解取决于PVA / SA比率。聚合物组合表现出假塑性行为,Farrow常数>1。均匀分布的AgNP(粒径约27.55 +/- 2.01 nm),高保水率(约13倍)和可生物降解(约5天)的敷料性质以及已经观察到AgNP和提取物具有浓度依赖性抗微生物活性的持续释放特征持续24小时。 SHD膜的自形,可生物降解,无菌,延长的抗氧化性,非溶血性,血液相容性和止血特性似乎是表层伤口的理想敷料。 (c)2015 Wiley Periodicals,Inc. J. Appl。 Polym。科学2016,133,43260。

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