Microstructure and characterization of electrospun poly(vinyl alcohol) nanofiber scaffolds filled with graphene nanosheets
Microstructure and characterization of electrospun poly(vinyl alcohol) nanofiber scaffolds filled with graphene nanosheets
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DOI：
10.1002/app.41891
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发表时间：
2015-05-05
影响因子：
3
通讯作者：
Lin, Jia-Horng
中科院分区：
文献类型：
--
作者：
Huang, Chien-Lin;Peng, Sheng-Yin;Lin, Jia-Horng
石墨烯纳米片（GNSs）由于其卓越的电子传输、优异的机械性能、高表面积和抗菌功能等特点而引起了科学界的广泛关注。制备了填充GNSs的聚乙烯醇（PVA）溶液进行静电纺丝，其可纺性与其溶液性质相关。研究了添加GNS对溶液流变性和电导率的影响。通过扫描电镜（SEM）、透射电镜（TEM）、广角x射线衍射（WAXD）和差示扫描量热法（DSC）对纤维进行了表征。研究结果揭示了GNS对PVA/GNS复合纳米纤维的微观结构、形貌和结晶性能的影响。在PVA溶液中加入GNSs可以提高溶液的粘度和导电性。PVA/GNS复合纳米纤维的电纺丝纤维直径小于纯PVA纳米纤维。GNSs不仅嵌入到纤维中，而且在纤维上形成突起。PVA/GNS纤维的结晶度随GNS含量的增加而降低。展望了PVA/GNS纤维在组织工程中的应用前景。(c) 2015 Wiley期刊公司j:。变异较大。自然科学学报，2015,32(4):41891。
Graphene nanosheets (GNSs) have attracted significant scientific attention because of their remarkable features, including exceptional electron transport, excellent mechanical properties, high surface area, and antibacterial functions. Poly(vinyl alcohol) (PVA) solutions filled with GNSs were prepared for electrospinning, and their spinnability was correlated with their solution properties. The effects of GNS addition on solution rheology and conductivity were investigated. The as-spun fibers were characterized via scanning electron microscopy (SEM), transmission electron microscopy (TEM), wide-angle X-ray diffraction (WAXD), and differential scanning calorimetry (DSC). The results revealed the effects of GNS on the microstructure, morphology, and crystallization properties of PVA/GNS composite nanofibers. The addition of GNSs in PVA solution increased the viscosity and conductivity of the solution. The electrospun fiber diameter of the PVA/GNS composite nanofiber was smaller than that of neat PVA nanofiber. GNSs were not only embedded at the fibers but also formed protrusions on the fibers. In addition, the crystallinity of PVA/GNS fiber decreased with higher GNS content. The possible application of PVA/GNS fibers in tissue engineering was also evaluated. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41891.