Engineering cross-linking by coal-based graphene quantum dots toward tough, flexible, and hydrophobic electrospun carbon nanofiber fabrics
Engineering cross-linking by coal-based graphene quantum dots toward tough, flexible, and hydrophobic electrospun carbon nanofiber fabrics
复制标题
通过煤基石墨烯量子点进行工程交联，制备坚韧、柔性和疏水性的电纺碳纳米纤维织物
DOI：
10.1016/j.carbon.2017.11.071
复制
发表时间：
2018-04
期刊：
影响因子：
10.9
通讯作者：
Jia Lixia
中科院分区：
文献类型：
--
作者：
Zhu Jiayao;Zhang Su;Wang Luxiang;Jia Dianzeng;Xu Mengjiao;Zhao Zongbin;Qiu Jieshan;Jia Lixia
聚丙烯腈基静电纺碳纤维织物具有广阔的应用前景。然而，未优化/有限的强度和柔性大大阻碍了它们的实际应用。我们发现，拉伸强度，杨氏模量，和柔性的ECNF可以显着提高通过简单的添加煤基石墨烯量子点（CGQD）的纺丝溶液。加入CGQD的ECNF的杨氏模量比纯聚丙烯腈衍生的ECNF的杨氏模量提高了7倍以上。然而，当通过化学还原除去CGQD上的含氧官能团时，几乎没有观察到改善。通过扫描电子显微镜、X射线衍射、拉曼光谱、傅里叶变换红外光谱和X射线光电子能谱等表征，我们认为CGQD由于其丰富的含氧官能团和良好的化学反应性而起到交联剂的作用，从而形成了致密、牢固和灵活的碳骨架。此外，随着CGQD含量的增加，ECNF的疏水性也逐渐提高。这归因于碳纳米纤维直径的增加。在优化条件下制备的ECNF的水接触角约为142°。因此，它可以用于高效和持久的重力驱动油/水分离。
Polyacrylonitrile-derived electrospun carbon nanofiber fabrics (ECNFs) are believed to have great potentials in many aspects. However, the un-optimized/limited strength and flexibility considerably hinder their practical applications. We find that the tensile strength, Young's modulus, and flexibility of the ECNFs can be significantly improved by the simple addition of coal-based graphene quantum dots (CGQDs) to a spinning solution. The Young's modulus of the CGQD-added ECNF is enhanced by more than 7 times than that of pure polyacrylonitrile-derived one. However, the improvement is barely observed when oxygen-bearing functional groups on the CGQDs are removed by chemical reduction. Characterized by scanning electron microscopy; X-ray diffraction; and Raman, Fourier-transform infrared, and X-ray photoelectron spectroscopies, we propose that the CGQDs act as cross-linking agents because of their abundant oxygen-bearing functional groups and good chemical reactivity, resulting in the formation of dense, strong, and flexible carbon skeleton. Moreover, the hydrophobicity of the ECNFs is also gradually improved with the increase in CGQD content. This is ascribed to the increase in diameter of the carbon nanofibers. The ECNF prepared under the optimized condition shows a water contact angle of approximately 142°. Thus, it can be used for efficient and endurable gravity-driven oil/water separation.
登录
查看更多内容
DOI：
10.1016/j.msec.2016.12.086
发表时间：
2017-04
期刊：
Materials science & engineering. C, Materials for biological applications
影响因子：
--
作者：
P. Tsekova;M. Spasova;N. Manolova;N. Markova;Iliya B Rashkov
通讯作者：
P. Tsekova;M. Spasova;N. Manolova;N. Markova;Iliya B Rashkov
通过化学方法将煤定制为尺寸可调的荧光碳点及其用于 Cu(II) 检测的能力
影响因子：
13.3
作者：
Hu, Chao;Yu, Chang;Qiu, Jieshan
通讯作者：
Qiu, Jieshan
影响因子：
--
作者：
Hongyang Zhao;Luxiang Wang;Dianzeng Jia;Wei Xia;Jun Li;Zaiping Guo
通讯作者：
Hongyang Zhao;Luxiang Wang;Dianzeng Jia;Wei Xia;Jun Li;Zaiping Guo
影响因子：
6.6
作者：
He, Yitao;Wang, Luxiang;Jia, Dianzeng
通讯作者：
Jia, Dianzeng
具有高量子产率和双波长光致发光的泄漏氧化石墨烯
影响因子：
10.9
作者：
Igor P. Asanov;Lyubov G. Bulusheva;Huaihe Song;Alex;er V. Okotrub
通讯作者：
er V. Okotrub