Electrospun Silk-Boron Nitride Nanofibers with Tunable Structure and Properties
Electrospun Silk-Boron Nitride Nanofibers with Tunable Structure and Properties
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DOI：
10.3390/polym12051093
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发表时间：
2020-05
期刊：
影响因子：
5
通讯作者：
Ye Xue;Xiao Hu
中科院分区：
文献类型：
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作者：
Ye Xue;Xiao Hu
本研究将六方氮化硼(h-BN)纳米片材与家蚕丝素蛋白(SF)复合，以不同比例电纺丝制得BNSF纳米纤维。研究发现，纳米纤维的表面形态和交联度可以通过混合比来调节。傅立叶变换红外光谱研究表明，纯SF电纺纤维以无规卷曲为主，随着h-BN纳米片层含量的增加，纤维逐渐形成α螺旋结构，表明该纳米纤维材料的结构是可调的。BN良好的热稳定性大大提高了电纺BNSF纳米纤维的热稳定性，温度调制差示扫描量热仪(TMDSC)揭示了BN与SF分子之间的强相互作用。随着BN的加入，界面水含量也降低，这可能是由于BN具有较高的疏水性所致。这些结果表明，丝基BN复合纳米纤维在生物医学领域或绿色环境研究中具有潜在的应用前景。
In this study, hexagonal boron nitride (h-BN) nanosheets and Bombyx mori silk fibroin (SF) proteins were combined and electrospun into BNSF nanofibers with different ratios. It was found that the surface morphology and crosslinking density of the nanofibers can be tuned through the mixing ratios. Fourier transform infrared spectroscopy study showed that pure SF electrospun fibers were dominated by random coils and they gradually became α-helical structures with increasing h-BN nanosheet content, which indicates that the structure of the nanofiber material is tunable. Thermal stability of electrospun BNSF nanofibers were largely improved by the good thermal stability of BN, and the strong interactions between BN and SF molecules were revealed by temperature modulated differential scanning calorimetry (TMDSC). With the addition of BN, the boundary water content also decreased, which may be due to the high hydrophobicity of BN. These results indicate that silk-based BN composite nanofibers can be potentially used in biomedical fields or green environmental research.