A facile strategy to improve the mechanical and thermal conductivity of PA6 nanocomposites by introducing graphene oxide/sodium benzoate compounding nucleator. Issue 10 (19th October 2021)

• Record Type: Journal Article
• Authors: Huang, Huan; Zhang, Zhao Xin; Zhang, Xun Tao; Yan, Lei; Yang, Shang Ke; Xiao, Liu Xin; Lin, Hai Lan; Bian, Jun; Chen, Dai Qiang
• Is Part Of: Journal of applied polymer science. Volume 139:Issue 10(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-10-19
• Subjects: applications -- composites -- mechanical properties -- morphology -- synthesis and processing techniques; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.51761
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: In this study, a new and facile route has been developed to prepare graphene oxide (GO)/sodium benzoate (Sb) compounding nucleator (GO‐Sb) reinforced polyamide 6 (PA6) nanocomposites. The effects and mechanism of adding GO/Sb compounding nucleator on the morphology and properties of PA6 nanocomposites were systematically investigated. The experimental results showed that there are electrostatic interaction and π–π conjugation between GO and Sb, which make the GO‐Sb compounding nucleator homogenously dispersed in matrix and gain good interfacial adhesion. XRD and DSC analysis revealed that incorporation of Sb improved the formation of γ ‐crystal. In addition, GO‐Sb significantly enhanced the crystallization temperature of PA6 nanocomposites due to "the heterogeneous nucleating effects". The tensile results showed that the tensile strength and elastic modulus of the nanocomposites can be obviously improved by incorporation of GO‐Sb compounding nucleator at low contents. The tensile strength and impact strength of the PA6‐GO‐Sb (100/0.05/0.25) nanocomposite were enhanced by 69.9% and 157.1%, respectively compared with pure PA6. Compared with pure PA6, the thermal conductivity of PA6‐GO‐Sb (100/0.05/0.25) nanocomposite increased by 258.8%. This simple and effective approach is believed to offer possibilities for broadening the graphene applications with the development of PA6‐graphene nanocomposites. Abstract : PA6 shows high strength and toughness due to the crystalline and amorphous regions in the aggregation state. Incorporation of layer structured GO into PA6 endows it with more ordered structure. By incorporating of GO/Sb compounding nucleator synergistically further effectively improves the dispersion of GO/Sb compounding nucleator and the heterogeneous nucleation, accelerated the crystallization rate and refined crystal size. Finally, the excellent mechanical property and thermal conductivity of PA6 nanocomposites are achieved through this strategy.