期刊
CARBOHYDRATE POLYMERS
卷 165, 期 -, 页码 285-293出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.02.066
关键词
Hydroxypropyl methylcellulose (HPMC); Xyloglucan (XG); Blend films; Crosslinking; Gentamicin sulfate; Antibacterial properties
资金
- Brazilian Funding Agency Fundagao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2015/14415-3, 2015/25103-2]
- Brazilian Funding Agency Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [302352/2014-7, 306245/2014-0, 448407/2014-0, 305178/2013-0]
Hydroxypropyl methylcellulose (HPMC) and xyloglucan (XG) crosslinked with citric acid over a range of HPMC/XG weight ratios formed sustainable blend films characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, tensile tests, circular dichroism and determination of inhibitory activity against Staphylococcus aureus and Escherichia coli. Both in solution and in the crosslinked films, HPMC chains lost the original ordered conformation upon interacting with XG, giving rise to an entropic gain. The highest values of tensile strength (25 MPa) and Young's modulus (689 MPa) occurred for the 50:50 HPMC/XG blend films. In vitro loading of gentamicin sulfate (GS) in the films amounted to 0.18 +/- 0.05-0.37 +/- 0.05 g of GS per g polymer. At pH 7.4 and 37 degrees C, the GS release kinetics from the films fitted with the Korsmeyer-Peppas model revealed a non-Fickian release mechanism with diffusional coefficient n similar to 0.7. The cross-linked films of HPMC, XG and their blends loaded with GS showed outstanding antibacterial activity against Staphylococcus aureus and Escherichia coli, disclosing their potential for novel biomedical applications. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据