Department of Textile Engineering, Modern Fibrous Structures & Environmental Enhancement (FFSEE), Amirkabir University of Technology, Tehran, Iran.
Department of Textile Engineering, Modern Fibrous Structures & Environmental Enhancement (FFSEE), Amirkabir University of Technology, Tehran, Iran.
Carbohydr Polym. 2014 Nov 26;113:231-9. doi: 10.1016/j.carbpol.2014.06.082. Epub 2014 Jul 11.
Here, chitosan/sericin/poly(vinyl alcohol) as a biodegradable nanofibrous membrane was prepared through electrospinning with and without silver nitrate. The influences of spinning conditions including volume ratio of chitosan and sericin, voltage and spinning distance at constant feed rate on the fiber morphology and size distribution were examined by SEM and Image J software. The FT-IR spectrum and EDAX were used to indicate the chemical structure of nanofibrous membrane. In addition, the effect of AgNO3 on the nanofibers diameter and its antibacterial activity was investigated. The optimum conditions obtained with chitosan:sericin (50:50, v/v), 22 kV voltage, 10 cm spinning distance at 0.25 mL/h feed rate to prepare nanofibers with small diameter and narrow size distribution without beads. The mean diameter of nanofibers was about 180 nm while introducing AgNO3 led to smaller nanofibers diameter about 95 nm. Moreover, the presence of AgNO3 produced an excellent antibacterial activity against Escherchia coli.
在这里，壳聚糖/丝胶/聚乙烯醇通过静电纺丝制备了可生物降解的纳米纤维膜，其中包括有无硝酸银。通过 SEM 和 Image J 软件研究了纺丝条件（包括壳聚糖和丝胶的体积比、电压和在恒定进料速率下的纺丝距离）对纤维形态和尺寸分布的影响。FT-IR 光谱和 EDAX 用于表明纳米纤维膜的化学结构。此外，还研究了 AgNO3 对纳米纤维直径及其抗菌活性的影响。通过壳聚糖：丝胶（50：50，v/v）、22 kV 电压、10 cm 纺丝距离和 0.25 mL/h 进料速率获得最佳条件，可制备出具有小直径和窄尺寸分布且无珠的纳米纤维。纳米纤维的平均直径约为 180nm，而引入 AgNO3 会导致纳米纤维直径约为 95nm。此外，AgNO3 的存在对大肠杆菌产生了极好的抗菌活性。
