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Preparation of polylactide/graphene composites from liquid‐phase exfoliated graphite sheets
Author(s) -
Li Xianye,
Xiao Yinghong,
Bergeret Anne,
Longerey Marc,
Che Jianfei
Publication year - 2014
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22673
Subject(s) - materials science , graphene , thermogravimetric analysis , nanocomposite , composite material , thermal stability , raman spectroscopy , ultimate tensile strength , scanning electron microscope , fourier transform infrared spectroscopy , graphite , dispersion (optics) , phase (matter) , transmission electron microscopy , chemical engineering , nanotechnology , organic chemistry , chemistry , physics , optics , engineering
Polylactide (PLA)/graphene nanocomposites were prepared by a facile and low‐cost method of solution‐blending of PLA with liquid‐phase exfoliated graphene using chloroform as a mutual solvent. Transmission electron microscopy (TEM) was used to observe the structure and morphology of the exfoliated graphene. The dispersion of graphene in PLA matrix was examined by scanning electron microscope, X‐ray diffraction, and TEM. FTIR spectrum and the relatively low I D / I G ratio in Raman spectroscopy indicate that the structure of graphene sheets (GSs) is intact and can act as good reinforcement fillers in PLA matrix. Thermogravimetric analysis and dynamic mechanical analysis reveal that the addition of GSs greatly improves the thermal stability of PLA/GSs nanocomposites. Moreover, tensile strength of PLA/GSs nanocomposites is much higher than that of PLA homopolymer, increasing from 36.64 (pure PLA) up to 51.14 MPa (PLA/GSs‐1.0). POLYM. COMPOS., 35:396–403, 2014. © 2013 Society of Plastics Engineers

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