Abstract
This work focuses on the preparation of copper nanoparticles-modified polyamide 6 composites (denoted as nano-Cu/PA6) by in situ polymerization, with which cupric oxide as metallic copper source is directly reduced to metallic copper in the process of the opening-ring polymerization of ε-caprolactam only using the reducing atmosphere of reaction system. The obtained composites are characterized by means of transmission electron microscopy, X-ray diffraction, laser granulometry instrument, and ultraviolet–visible absorption spectroscopy. Moreover, the friction and wear resistance, mechanical strength, and antistatic performance of as-prepared composites are also readily evaluated. The results show that cupric oxide as filler is reduced to metallic copper and the as-reduced copper nanoparticles with 4–5-nm-size clusters separately disperse in polyamide 6 (PA6) matrix. Additionally, the addition content (mass fraction) of cupric oxide has significant effect on the crystalline form of PA6, and γ crystalline form of PA6 is predominant when higher dosage of CuO is introduced to fabricating nano-Cu/PA6 composites. Moreover, introducing a proper amount of CuO filler favors to generate nano-Cu/PA6 composites with improved mechanical properties and wear resistance. Particularly, nano-Cu/PA6 composite prepared at a CuO content of 0.5 % possesses the best tensile strength and wear resistance, showing promising application as a functional polymer–matrix composite.
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Acknowledgments
This research is financially supported by the Ministry of Science and Technology of China (project of ‘973’ plan; Grant No. 2013CB63303), Henan Provincial Natural Science Foundation of China (Grant No. 1121012104000 and 112300410184), National Natural Science Foundation of China (Grant No. 21371050) and Program for Changjiang Scholars and Innovative Research Team in University (No. PCSIRT1126).
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Xu, Q., Li, X. & Zhang, Z. Preparation of Cu nanoparticles-modified PA6 composites using CuO as filler. J IRAN CHEM SOC 11, 1717–1721 (2014). https://doi.org/10.1007/s13738-014-0444-4
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DOI: https://doi.org/10.1007/s13738-014-0444-4