Effect of reduced graphene oxide content on the microstructure and mechanical properties of graphene–geopolymer nanocomposites

Yan, Shu; He, Peigang; Jia, Dechang; Yang, Zhihua; Duan, Xiaoming; Wang, Shengjin; Zhou, Yu

doi:10.1016/j.ceramint.2015.08.176

Cited by 67 publications

(27 citation statements)

References 34 publications

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“…As the reaction time increases, the degree of densi-fication increases and the amorphousness of the material [110] decreases [104]. In another study [105] reported the effect of reduced GO content on graphene-geopolymer nanocom-posites. It is pointed out that under the action of alkaline geopolymer solution, GO is reduced to RGO in a short time.…”

Section: Research Progress Of Graphene Modified Geopolymermentioning

confidence: 99%

“…The results showed that the compressive strength and flexural strength of geopolymers increased by 1.44 times and 2.16 times, respectively, after adding 1% GNPs. Yan et al have conducted a number of graphene-related experi-mental studies [104][105][106]. In the study of the performance of GO geopolymers at different times, it was found that within 0 to 24 hours, RGO binds well to the geopolymer matrix.…”

Section: Research Progress Of Graphene Modified Geopolymermentioning

confidence: 99%

“…Detailed observation of interface microstructure of the rGO/GP5 composites: (a)-(d) SEM images; (e), (f) TEM images; insets display selected electronic diffraction patterns[105] …”

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confidence: 99%

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Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Liu

Huang

et al. 2020

Nanotechnology Reviews

181

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AbstractIn recent years, with the higher requirements for the performance of cement-based materials and the call for energy conservation and environmental protection, a wave of research on new materials has set off, and various high-performance concrete and more environmentally friendly geopolymers have appeared in the public. With a view to solving the defects of energy consumption, environmental protection and low toughness of traditional cement-based materials. At the same time, nanomaterials have become a focus of current research. Therefore, the research on the properties of cement-based materials and geopolymers modified by graphene and its derivatives has aroused extensive interest of researchers. Graphene-based nanomaterials are one of them. Because of their large specific surface area, excellent physical properties have been favored by many researchers. This paper reviews the research progress of graphene-based nanomaterials in improving the properties of cement-based materials and geopolymer materials, and points out the main challenges and development prospects of such materials in the construction field in the future.

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Section: Research Progress Of Graphene Modified Geopolymermentioning

confidence: 99%

Section: Research Progress Of Graphene Modified Geopolymermentioning

confidence: 99%

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Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Liu

Huang

et al. 2020

Nanotechnology Reviews

181

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“…Moreover, the wrinkled surface of rGO contributes to the strong bonding state between rGO and its AAMs matrix. This strong interfacial bonding further enhances the strength because rGO effectively dissipates the stress [50,70,71].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Particularly, reduced graphene oxide (rGO) is used in construction for its large specific surface area, favorable mechanical strength, and high toughness [44][45][46][47]. In addition to this superior performance, rGO can effectively disperse in the highly alkaline environment of AAMs matrix (pH~12.5) due to electrostatic stabilization and significantly improve its mechanical properties [48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

Long¹,

Lin²,

Tan³

et al. 2020

Materials

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Development of low thermal conductivity and high strength building materials is an emerging strategy to solve the heavy energy consumption of buildings. This study develops sustainable alkali activated materials (AAMs) for structural members from waste expanded polystyrene (EPS) beads and reduced graphene oxide (rGO) to simultaneously meet the thermal insulation and mechanical requirements of building energy conservation. It was found that the thermal conductivity of AAMs with 80 vol.% EPS and 0.04 wt.% rGO (E8–G4) decreased by 74% compared to the AAMs without EPS and rGO (E0). The 28-day compressive and flexural strengths of E8–G4 increased by 29.8% and 26.5% with the addition of 80 vol.% EPS and 0.04 wt.% rGO, compared to the sample with 80 vol.% EPS without rGO (E8). In terms of compressive strength, thermal conductivity, and cost, the efficiency index of E8–G4 was higher than those of other materials. A building model made from AAMs was designed using building information modeling (BIM) tools to simulate energy consumption, and 31.78% of total energy consumption (including heating and cooling) was saved in the building operation period in Harbin City, China. Hence, AAMs made of waste EPS beads and rGO can realize the structural and functional integrated application in the future.

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Introduction

Jia

Wang

et al. 2020

Geopolymer and Geopolymer Matrix Composites

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Effect of reduced graphene oxide content on the microstructure and mechanical properties of graphene–geopolymer nanocomposites

Cited by 67 publications

References 34 publications

Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

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