Kianfar Parnian, Vitale Alessandra, Dalle Vacche Sara, Bongiovanni Roberta
Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy.
Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy.
Carbohydr Polym. 2019 Aug 1;217:144-151. doi: 10.1016/j.carbpol.2019.04.062. Epub 2019 Apr 18.
Photo-crosslinked nanofiber mats containing chitosan were obtained through the versatile and promising technology of electrospinning. Due to the challenging processability of chitosan by electrospinning because of its stiffness and polycationic nature, it was blended with easily-spinnable poly(ethylene oxide). The optimum conditions for electrospinning of chitosan/poly(eyhylene oxide) (CS/PEO) blends were selected for further characterization and investigation: the composition of CS/PEO 70/30 mass fraction was chosen as it allowed to produce uniform and defect free electrospun mats formed by fibers with an average diameter of 270 nm. In order to improve the physico-chemical properties (in particular the stability and water resistance) of the electrospun mats, electrospinning was coupled with the fast and eco-friendly technique of photo-crosslinking. The photo-curing reaction of the CS/PEO fibers, as well as the morphology, thermal properties and water resistance of the electrospun mats before and after application of UV irradiation, were investigated. The photo-crosslinking process was optimized in order to fabricate CS/PEO electrospun mats which are resistant to water and thus can enlarge the application of such membranes, especially in biomedical, filtration and food industries.
通过通用且有前景的静电纺丝技术获得了含有壳聚糖的光交联纳米纤维垫。由于壳聚糖因其刚性和聚阳离子性质而难以通过静电纺丝进行加工，因此将其与易于纺丝的聚环氧乙烷混合。选择壳聚糖/聚环氧乙烷（CS/PEO）共混物静电纺丝的最佳条件进行进一步表征和研究：选择质量分数为70/30的CS/PEO组成，因为它能够生产出由平均直径为270nm的纤维形成的均匀且无缺陷的静电纺垫。为了改善静电纺垫的物理化学性质（特别是稳定性和耐水性），将静电纺丝与快速且环保的光交联技术相结合。研究了CS/PEO纤维的光固化反应以及紫外线照射前后静电纺垫的形态、热性能和耐水性。对光交联过程进行了优化，以制备耐水的CS/PEO静电纺垫，从而扩大此类膜的应用，特别是在生物医学、过滤和食品工业中的应用。
