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Preparation of antibacterial ZnO NP-containing schizophyllan/bacterial cellulose nanocomposite for wound dressing
Cellulose ( IF 4.9 ) Pub Date : 2021-08-11 , DOI: 10.1007/s10570-021-04119-8
Sepideh Hamedi 1 , Seyed Abbas Shojaosadati 2
Affiliation  

Nanocomposite hydrogel is helpful to provide a moist and ideal environment for wound healing. In this research study, a nanocomposite hydrogel was prepared based on schizophyllan (SPG) and amine-functionalized bacterial cellulose (amine-functionalized BC). ZnO-nanoparticles were loaded into amine-grafted BC/SPG hydrogel to improve its antibacterial feature. The successful functionalization of bacterial cellulose by (3-aminopropyl)triethoxysilane was verified by FTIR and XRD analyses. XRD pattern of amine-grafted BC/SPG/ZnO NP showed some new peaks in comparison with XRD pattern of amine-grafted BC/SPG which verified the intercalation of ZnO into polymeric matrix. SEM images showed that the porous spaces of BC have been filled by schizophyllan as a result of the intermolecular attraction between them. Deposition of ZnO nanoparticles on the surface of amine-grafted BC/SPG has also been verified by SEM analysis. Amine-grafted BC/SPG membrane showed the higher swelling degree (850 ± 48%) in comparison with BC (512 ± 29%). The swelling ratio decreased to 725 ± 19% by addition of ZnO nanoparticles. Amine-grafted BC/SPG exhibited the higher mechanical strength (45 MPa) in comparison with pristine BC (10 MPa). The tensile strength of amine-grafted BC/SPG/ZnO NP nanocomposite reached ~ 70 MPa that might be resulted from the formation of hydrogen bonding between hydroxyl groups of polymers and oxygen atoms in the ZnO NPs. Amine-grafted BC/SPG/ZnO showed a more remarkable antibacterial efficiency against E. coli and S. aureus. As compared to BC, amine-grafted BC/SPG could stimulate the proliferation of human fibroblast cell. Cell viability showed a slight decrease after exposure to amine-grafted BC/SPG/ZnO NP nanocomposite.



中文翻译:

用于伤口敷料的含抗菌ZnO NP的裂叶多糖/细菌纤维素纳米复合材料的制备

纳米复合水凝胶有助于为伤口愈合提供湿润和理想的环境。在这项研究中,基于裂殖多糖 (SPG) 和胺功能化细菌纤维素 (胺功能化 BC) 制备了纳米复合水凝胶。ZnO 纳米颗粒被加载到胺接枝的 BC/SPG 水凝胶中以改善其抗菌特性。FTIR 和 XRD 分析证实了(3-氨基丙基)三乙氧基硅烷对细菌纤维素的成功功能化。胺接枝的 BC/SPG/ZnO NP 的 XRD 图案与胺接枝的 BC/SPG 的 XRD 图案相比显示出一些新的峰,这证实了 ZnO 嵌入聚合物基质中。SEM 图像显示 BC 的多孔空间由于它们之间的分子间吸引力而被裂叶多糖填充。SEM 分析也证实了 ZnO 纳米颗粒在胺接枝 BC/SPG 表面的沉积。与 BC (512 ± 29%) 相比,胺接枝的 BC/SPG 膜显示出更高的溶胀度 (850 ± 48%)。通过添加 ZnO 纳米颗粒,溶胀率降低到 725±19%。与原始 BC (10 MPa) 相比,胺接枝的 BC/SPG 表现出更高的机械强度 (45 MPa)。胺接枝的 BC/SPG/ZnO NP 纳米复合材料的拉伸强度达到~70 MPa,这可能是由于聚合物的羟基与 ZnO NP 中的氧原子之间形成氢键所致。胺接枝的 BC/SPG/ZnO 显示出更显着的抗菌效率 与 BC (512 ± 29%) 相比,胺接枝的 BC/SPG 膜显示出更高的溶胀度 (850 ± 48%)。通过添加 ZnO 纳米颗粒,溶胀率降低到 725±19%。与原始 BC (10 MPa) 相比,胺接枝的 BC/SPG 表现出更高的机械强度 (45 MPa)。胺接枝的 BC/SPG/ZnO NP 纳米复合材料的拉伸强度达到~70 MPa,这可能是由于聚合物的羟基与 ZnO NP 中的氧原子之间形成氢键所致。胺接枝的 BC/SPG/ZnO 显示出更显着的抗菌效率 与 BC (512 ± 29%) 相比,胺接枝的 BC/SPG 膜显示出更高的溶胀度 (850 ± 48%)。通过添加 ZnO 纳米颗粒,溶胀率降低到 725±19%。与原始 BC (10 MPa) 相比,胺接枝的 BC/SPG 表现出更高的机械强度 (45 MPa)。胺接枝的 BC/SPG/ZnO NP 纳米复合材料的拉伸强度达到~70 MPa,这可能是由于聚合物的羟基与 ZnO NP 中的氧原子之间形成氢键所致。胺接枝的 BC/SPG/ZnO 显示出更显着的抗菌效率 胺接枝的 BC/SPG/ZnO NP 纳米复合材料的拉伸强度达到~70 MPa,这可能是由于聚合物的羟基与 ZnO NP 中的氧原子之间形成氢键所致。胺接枝的 BC/SPG/ZnO 显示出更显着的抗菌效率 胺接枝的 BC/SPG/ZnO NP 纳米复合材料的拉伸强度达到~70 MPa,这可能是由于聚合物的羟基与 ZnO NP 中的氧原子之间形成氢键所致。胺接枝的 BC/SPG/ZnO 显示出更显着的抗菌效率大肠杆菌金黄色葡萄球菌。与BC相比,胺接枝的BC/SPG可以刺激人成纤维细胞的增殖。暴露于胺接枝的 BC/SPG/ZnO NP 纳米复合材料后,细胞活力略有下降。

更新日期:2021-08-12
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