• 文献标题:   Effects of graphene quantum dot (GQD) on photoluminescence, mechanical, thermal and shape memory properties of thermoplastic polyurethane nanocomposites
  • 文献类型:   Article
  • 作  者:   NEJAD SS, BABAIE A, BAGHERI M, REZAEI M, ABBASI F, SHOMALI A
  • 作者关键词:   crystallinity, gqd nanoparticle, shape memory polyurethane, thermomechanical propertie
  • 出版物名称:   POLYMERS FOR ADVANCED TECHNOLOGIES
  • ISSN:   1042-7147 EI 1099-1581
  • 通讯作者地址:   Azarbaijan Shahid Madani Univ
  • 被引频次:   1
  • DOI:   10.1002/pat.4948 EA MAY 2020
  • 出版年:   2020

▎ 摘  要

A group of shape memory polyurethane-based nanocomposites containing graphene quantum dot nanoparticles (GQDs) were prepared via in-situ polymerization method. GQD nanoparticles were synthesized by a facile and rapid microwave-assisted method and characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction pattern, field emission scanning microscopy, transmission electron microscopy, and fluorescence analysis. Chemical structure and hydrogen bonding index (HBI[C=O]) of the nanocomposites were analyzed via FTIR spectra. The results show that the incorporation of GQDs in PU matrix reduces HBI(C=O) of nanocomposites. Crystalline structure and thermal properties of the nanocomposites were investigated by differential scanning calorimetry. As results indicate, nucleation effect of GQDs raises crystallinity content of the samples. Mechanical examinations indicate that incorporation of GQDs improves Young's modulus of the nanocomposites, while their elongation at break values are reduced. In addition, shape memory analyses reveal that the presence of GQDs in PU matrix increases the shape fixity ratios in nanocomposites.