Inorganic Chemicals Industry >
Preparation of functionalized graphene oxide and its application in portland cement
Received date: 2022-09-01
Online published: 2023-06-14
Poor bonding strength between nanomaterials and cement composites inevitably lead to the failure of reinforcement.Graphene oxide（GO） possesses large amounts of oxygen functional groups，but shows highly unstable in the strongly alkaline environment.In this study，a novel functionalization method for the fabrication of functionalized GO（FGO） was explored and GO and FGO cement based composites were prepared.Fourier transform-infrared spectroscopy （FT-IR），X-ray photoelectron spectrometer（XPS），scanning electron microscope（SEM） and transmission electron microscope（TEM） were used to analyze the bonding properties and the stability of nanomaterials in simulated pore solution.The results showed that the functionalized layer of FGO were composed of（3-aminopropyl） triethoxysilane（APTES） and amorphous SiO2，which could protect the GO basal plane from reduction in the strongly alkaline environment and participate in the cement hydration process to form strong and reliable bonding.Compared with plain cement，0.1%FGO could increase the 28 d flexural and compressive strength of hardened cement paste by 24.73% and 55.28%，respectively.FGO exhibited a greater dispersibility，refined pore structure in cement paste，and finally improved the mechanical properties of cement composites.
LI Bo , LIAO Bihai . Preparation of functionalized graphene oxide and its application in portland cement[J]. Inorganic Chemicals Industry, 2023 , 55(6) : 57 -62 . DOI: 10.19964/j.issn.1006-4990.2022-0525
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