Chin.Phys.Lett.  2017, Vol. 34 Issue (3): 036101    DOI: 10.1088/0256-307X/34/3/036101
Microstructural Changes of Graphene/PLA/PBC Nanofibers by Electrospinning during Tensile Tests
Wei-Dong Cheng1**†, Chuan-Hui Ren1†, Xiao-Hua Gu1, Zhao-Jun Wu2, Xue-Qing Xing3**, Guang Mo3, Zhong-Jun Chen3, Zhong-Hua Wu3
1College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006
2Department of Practice Teaching and Equipment Management, Qiqihar University, Qiqihar 161006
3Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
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Abstract This study focuses on the nanostructure and nanostructural changes of novel graphene/poly(lactic acid) (PLA)/ poly(butylene carbonate) (PBC) nanofibers via electrospinning, which are characterized by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), tensile test and in situ small angle x-ray scattering. DSC indicates that the endothermic peak at 295$^\circ\!$C of pure PLA/PBC nanofibers shifted from 317$^{\circ}\!$C to lower 290$^{\circ}\!$C with the increasing graphene content. SEM observations reveal a fine dispersion of graphene in the nanofiber matrices. The graphene/PLA/PBC nanofibers exhibit good improvements in mechanical property. The tensile strength of nanofibers increases with the addition of 0.01 g graphene but reduces with further addition of 0.04 g graphene. The scattering intensities increase dramatically when the strain levels are higher than the yield point due to the nucleation and growth of nanovoids or crystals. However, the increasing content of graphene in the PLA/PBC matrix provokes a strong restriction to the deformation-induced crystals.
Received: 01 December 2016      Published: 20 March 2017
PACS: (X-ray scattering (including small-angle scattering))  
  78.70.Ck (X-ray scattering ?)  
  62.20.F- (Deformation and plasticity)  
Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11405199, U1432104, U1332107, 10835008, 11305198 and U1232203, and the Project of Education Department of Heilongjiang Province under Grant Nos 135109211 and 135109214.
Issue Date: 20 March 2017
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Wei-Dong Cheng,Chuan-Hui Ren,Xiao-Hua Gu et al  2017 Chin.Phys.Lett. 34 036101
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Wei-Dong Cheng
Chuan-Hui Ren
Xiao-Hua Gu
Zhao-Jun Wu
Xue-Qing Xing
Guang Mo
Zhong-Jun Chen
Zhong-Hua Wu
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