Preparation and Performance of PMMA/DEAM⁃RGO Nanocomposites

doi:10.19491/j.issn.1001-9278.2021.01.008

Abstract

Abstract:

In this work， the surface of reduced graphene oxide （RGO） was modified with diethylaminoethyl methacrylate （DEAM） and then dispersed in an MMA monomer. The PMMA/DEAM-RGO nanocomposites were prepared by emulsion polymerization， and their structure and properties were investigated using Fourier-transform infrared spectrometer， Raman spectrometer， scanning electron microscope， transmission electron microscope， X-ray diffractometer， differential scanning calorimeter and thermogravimetric analyzer. The results indicated that RGO was completely covered by PMMA with the aid of DEAM and thus achieved a uniform dispersion in the PMMA matrix. The experiments also confirmed that there was a strong interaction between the DEAM amine groups and surface the functional groups on the RGO surface. The modified RGO could act as a physical cross-linking point in the PMMA matrix. This led to an increase in the toughness and strength of PMMA/RGO nanocomposites with an increase in the amount of modified RGO. Moreover， the thermal stability and antistatic properties of the nanocomposites were also improved.

Key words: polymethyl methacrylate, reduced graphene oxide, emulsion polymerization, nanocomposite

CLC Number:

TQ 323.4⁺2

KANG Wei, LIU Xijun, CAO Weiyan, WANG Yuwei, YAN Jie. Preparation and Performance of PMMA/DEAM⁃RGO Nanocomposites[J]. China Plastics, 2021, 35(1): 47-53.

Figures/Tables 13

Fig.1. Reaction mechanism

Fig.2. Infrared spectrum of DEAM?RGO

Fig.3. XPS spectrum of DEAM?RGO

Fig.4. Raman spectrum of DEAM?RGO

Fig.5. FTIR spectra of PMMA/DEAM?RGO nanocomposites

Fig.6. Raman spectrum of PMMA/DEAM?RGO nanocomposites

Fig.7. SEM images of brittle sections of PMMA/DEAM?RGO nanocomposites

Fig.8. TEM images of PMMA/DEAM?RGO nanocomposites

Fig.9. XRD curves of PMMA/DEAM?RGO nanocomposites

Fig.10. DSC curves of PMMA/DEAM?RGO nanocomposites

Fig.11. TG curves of PMMA/DEAM?RGO nanocomposites

试样	电导率/S·m^-1
PMMA	10^-14
PMG1	1.02×10^-4
PMG2	3.47×10^-4
PMG3	6.64×10^-3

Tab.1. Conductivity of PMMA/DEAM?RGO nanocomposites

样品	冲击强度/kJ·m^-2	拉伸强度/MPa	断裂伸长率/%
PMMA	4.37	26.48	9.54
PMG1	4.58	38.69	10.82
PMG2	5.50	58.35	19.10
PMG3	6.65	73.47	23.56

Tab.2. The mechanical properties of PMMA/DEAM?RGO nanocomposites

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