Flow-induced Structural Evolution in Graphene Oxide-grafted Carbon Nanotube/Polyamide 6 Composites with Enhanced Barrier Performance, Mechanical Properties, and Thermal Conductivity

Guan-Jun Liu; Mei-Ling Yan; Zhen Tian; Lu Wang; Fan Yang; Rong-Guo Wang

doi:10.1007/s10118-026-3765-8

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Flow-induced Structural Evolution in Graphene Oxide-grafted Carbon Nanotube/Polyamide 6 Composites with Enhanced Barrier Performance, Mechanical Properties, and Thermal Conductivity

RESEARCH ARTICLE | Updated：2026-08-19

- Flow-induced Structural Evolution in Graphene Oxide-grafted Carbon Nanotube/Polyamide 6 Composites with Enhanced Barrier Performance, Mechanical Properties, and Thermal Conductivity
- Chinese Journal of Polymer Science Vol. 44, Pages: 1-13(2026)
- Affiliations：
  
  a.College of chemical engineering and materials, Shandong University of Aeronautics, Binzhou 256603, China
  b.School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
  c.Department of Geology and Surveying and Mapping, Shanxi Institute of Energy, Jinzhong 030600, China
  d.National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China
- Author bio：
  
  liuguanjun@sdua.edu.cn (G.J.L.)
  yanmeiling123@163.com (M.L.Y.)
- Funds：
- DOI：10.1007/s10118-026-3765-8
  CLC：
- Received：26 April 2026，
  
  Accepted：31 May 2026，
  
  Online First：19 August 2026，
  
  Published：2026-07
- Accepted：
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Liu, G. J.; Yan, M. L.; Tian Z.; Wang L.; Yang F.; Wang R. G. Flow-induced structural evolution in graphene oxide-grafted carbon nanotube/polyamide 6 composites with enhanced barrier performance, mechanical properties, and thermal conductivity. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3765-8

Guan-Jun Liu, Mei-Ling Yan, Zhen Tian, et al. Flow-induced Structural Evolution in Graphene Oxide-grafted Carbon Nanotube/Polyamide 6 Composites with Enhanced Barrier Performance, Mechanical Properties, and Thermal Conductivity[J/OL]. Chinese Journal of Polymer Science, 2026, 441-13.
Liu, G. J.; Yan, M. L.; Tian Z.; Wang L.; Yang F.; Wang R. G. Flow-induced structural evolution in graphene oxide-grafted carbon nanotube/polyamide 6 composites with enhanced barrier performance, mechanical properties, and thermal conductivity. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3765-8 DOI：

Guan-Jun Liu, Mei-Ling Yan, Zhen Tian, et al. Flow-induced Structural Evolution in Graphene Oxide-grafted Carbon Nanotube/Polyamide 6 Composites with Enhanced Barrier Performance, Mechanical Properties, and Thermal Conductivity[J/OL]. Chinese Journal of Polymer Science, 2026, 441-13. DOI： 10.1007/s10118-026-3765-8.

摘要

Abstract

Hot pressing is widely used to tailor the structures and properties of polymer composit

es. However

how it drives structural evolution and thereby affects barrier

mechanical

and thermal properties remains insufficiently understood. In this work

graphene oxide-grafted carbon nanotube/polyamide 6 (GO-

-CNT/PA6) composites were subjected to hot pressing at different radial expansion ratios (

and 4) to investigate the flow-induced structural evolution and the resulting property changes. Scanning electron microscopy and transmission electron microscopy observations revealed that hot pressing promoted the rearrangement and preferential alignment of the hybrid nanofillers

while two-dimensional wide-angle X-ray diffraction confirmed the enhanced crystalline orientation after hot pressing. Differential scanning calorimetry showed increased crystallinity in both the neat PA6 and GO-

-CNT/PA6 composites. Representative positron annihilation lifetime spectroscopy analysis further indicated a reduction in the fractional free volume

whereas the characteristic size of individual free-volume holes remained nearly unchanged. The results indicate that the optimal hot-pressing condition is property-dependent. A moderate deformation at

=2 is more favorable for improving the hydrogen barrier and tensile properties

whereas a stronger deformation at

=4 is more effective in promoting in-plane heat transport. These findings establish a correlation between the processing

structural evolution

and multifunctional properties of GO-

-CNT/PA6 composites

providing guidance for the design of PA6-based liner materials for Type IV hydrogen storage vessels.

关键词

Keywords

references

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