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首页 > 学术中心 > 学术ASAP > 新方法!制备核壳结构纳米纤维
 

新方法!制备核壳结构纳米纤维

 
发布日期:2016-05-09     来源:
 

Preparation, characterization, and application of PEO/HA core shell nanofibers based on electric field induced phase separation during electrospinning.

Guangkai Chen, Junxia Guo, Jun Nie, Guiping Ma

Polymer 83 (2016) 12-19

Abstract                                          

Core-shell structured PEO/HA nanofibers could be produced from electric field inducing phase separation during the electrospinning progress. Hyaluronic acid (HA) molecules could move along the opposite direction of the electric field under the electrostatic force, which induced phase separation from PEO to form the core layer of nanofibers. The morphology of core-shell nanofibers was supported using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Thermal analysis and X-ray diffraction (XRD) results showed that the fibers had good thermal stability and HA hindered the crystallization of the PEO. The presence of PEO on the surface was also verified by X-ray photoelectron spectroscopy (XPS) analysis as further evidence of core-shell formation during the process of electrospinning. Methylthiazolydiphenyl-tetrazolium bromide (MTT) assay was employed to investigate the toxic and cytocompatibility with the aim of demonstrating the possible application for tissue engineering scaffolds. Furthermore, In vitro cytotoxicity against fibroblasts cells culture demonstrated the nanofibers as scaffolds were biocompatible and nontoxic.

北京化工大学马贵平组利用天然聚电解质,在高压电场下将做微观运动。经过实验设计,改变传统的高压电施加方式,将电极插入纺丝溶液当中(采用内置电极),成功制备出聚氧化乙烯/透明质酸(PEO/HA)核壳结构纳米纤维。

原文链接

http://www.sciencedirect.com/science/article/pii/S0032386115304183

 
 
 

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