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Thermal and mechanical performance of electrospun chitosan/poly(vinyl alcohol) nanofibers with graphene oxide

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Abstract

In this paper, electrospun chitosan (CS)/poly(vinyl alcohol) (PVA)/graphene oxide (GO) nanofibers were fabricated. Prepared nanofibers have been characterized and investigated for their morphological, structural, and thermal stability, and mechanical and hydrophilic properties. The uniform and defect-free nanofibers were obtained and GO, shaping spindle and spherical, was partially embedded into nanofibers, as shown in SEM. The hydrogen bonds between CS molecules and PVA molecules were easily formed due to the great compatibility of CS and PVA. The addition of GO interrupted the hydrogen bonds between CS molecules and PVA molecules, and the new interaction was formed among CS, PVA, and GO. Thermogravimetric analysis indicated that as the increasing of content of GO, the thermal stability of nanofibers decreased. More interestingly, the static mechanical properties tests and dynamic mechanical analysis all showed that the modulus of nanofibrous mats increased firstly and decreased subsequently with the increasing of content of GO, which could be concerned with the looser arrangement of nanofibers. The water contact angle of nanofibrous mats increased with the increasing of content of GO. Nevertheless, when the content of GO was up to 2.5 wt%, the water contact angle decreased significantly.

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Funding

This research was financially supported through grants from the Fundamental Research Funds for the Central Universities (2572018BB10) and Heilongjiang Postdoctoral Foundation Assistance (LBH-Z13010), National Program for Support of Top-notch Young Professionals, National Natural Science Foundation of China (51773049), China Aerospace Science and Technology Corporation-Harbin Institute of Technology Joint Center for Technology Innovation Fund (HIT15-1A01), Harbin city science and technology projects (2013DB4BP031 and RC2014QN017035), China Postdoctoral Science Special Foundation (201003420 and 20090460067), HIT Research Institute (Zhao Yuan) of New Materials and Intelligent Equipment Technology Co., Ltd., and Scientific and Technological Cooperation and Development Fund (2017KJHZ002).

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Correspondence to Zaixing Jiang or Dawei Zhang.

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Yang, S., Liu, Y., Jiang, Z. et al. Thermal and mechanical performance of electrospun chitosan/poly(vinyl alcohol) nanofibers with graphene oxide. Adv Compos Hybrid Mater 1, 722–730 (2018). https://doi.org/10.1007/s42114-018-0060-3

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  • DOI: https://doi.org/10.1007/s42114-018-0060-3

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