Preparation of FGO/PBMA Composites with Improved Thermal Stability†

doi:10.7503/cjcu20140120

Abstract

Abstract:

Graphene oxide(GO) nanosheets was modified by 3-triethoxysilylpropylamine(KH550) to get functional graphene oxide(FGO). Then FGO was reacted with butyl methacrylate(BMA) via in situ polymerization with the initiator AIBN in N₂. The prepared functional graphene oxide/polybutylmethacrylate(FGO/PBMA) composites were characterized by Fourier transform infrared spectroscopy(FTIR), X-ray photoelectron spectrometry(XPS), scanning electron microscope(SEM) and thermal gravimetric analysis(TGA). The thermal stability of the FGO/PBMA composites were significantly enhanced compared with that of neat PBMA. The maximum mass loss temperature increased from 267 ℃ for neat PBMA to 339 ℃ for FGO/PBMA composites. Meanwhile the reaction mechanism was also discussed.

Key words: Graphene oxide/polybutylmethacrylate(FGO/PBMA), in situ Polymerization, Thermal stability, Reaction mechanism

CLC Number:

O645

TrendMD:

ZHANG Danfeng, FAN Louzhen, GUO Ruihua, FAN Zetan. Preparation of FGO/PBMA Composites with Improved Thermal Stability^†[J]. Chem. J. Chinese Universities, 2014, 35(11): 2466.

Figures/Tables 8

Fig.1 FTIR spectra of GO(a), FGO(b) and FGO/PBMA(c)

Fig.2 Wide scan XPS of GO(A) and FGO/PBMA(B)

Fig.3 Narrow scan XPS of C1s for GO(A) and FGO/PBMA(B) and N1s for FGO/PBMA(C)

Table 1 Peaks and fractions of different C-containing groups in Fig.3(B)

Bond	E_b/eV	Fractions(%)	Bond	E_b/eV	Fractions(%)
C=C	284.59	12.39	C=O	288.02	2.44
C—N	285.97	28.51	—COO	288.78	2.08
C—C	284.94	38.59	C(epoxy)	286.53	15.99

Fig.4 SEM images of GO(A), PBMA(B), FGO(C), FGO/PBMA(D) and AFM image of GO(E) with height profile(F)

Fig.5 TGA curves of GO(a), FGO(b), PBMA(c) and FGO/PBMA(d) in N2

Scheme 1 Functionalization of FGO

Scheme 2 Reaction between BMA and FGO to produce FGO/PBMA

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