阳离子聚合物改性氧化石墨烯对水泥基复合材料性能的影响

doi:10.19964/j.issn.1006-4990.2024-0383

Abstract

Abstract:

The aggregation issue of graphene oxide（GO） in concrete can affect the mechanical properties of cement-based composites reinforced with GO as filler.To address the dispersion problem of GO in cement-based composites，GO was surface-grafted with hydrophilic poly 4-vinylpyridine（P4VP） and then quaternized to prepare cationic P4VP-grafted GO（CP4VP-GO）.Cement-based composites incorporating both unmodified GO and cationic modified CP4VP-GO were prepared.Characterization of the sample structures was conducted using fourier transform infrared spectroscopy（FT-IR），X-ray diffraction（XRD），and scanning electron microscopy（SEM），among other techniques.The results indicated that the dispersibility of cationic polymer modified CP4VP-GO in calcium hydroxide solution was better than that of unmodified GO.In addition，the compressive strength and flexural strength of the composite were affected by the hydration time and the content of the filler.When the content of CP4VP-GO in cement was 0.04%（mass fraction），the flexural strength of the cement composite at 28 d was as high as 8.2 MPa，which was significantly higher than that unmodified GO.When the content of CP4VP-GO was 0.06%，the maximum compressive strength of the cement composite at 28 d reached 73.2 MPa.This work provided theory and experimental basis for designing and preparing high performance cement-based composites.

Key words: graphene oxide, cationization, compressive strength and flexural strength, concrete, composite materials

CLC Number:

TB332

LIU Beibei, LI Zhengtao. Effect of cationic polymer modified graphene oxide on performance of cement-based composites[J]. Inorganic Chemicals Industry, 2025, 57(7): 80-86.

Figures/Tables 8

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Inorganic Acid-Base-Salt Committee of CIESC

Effect of cationic polymer modified graphene oxide on performance of cement-based composites

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