Dispersion of graphene oxide and its application prospect in cement-based materials: a review

Wang, Huangqi; Zhang, Liran; Wang, Dongmin; Geng, Danhua; Zhang, Ming; Du, Weidong; Chen, Huixin

doi:10.1080/01932691.2021.1948423

Cited by 9 publications

(6 citation statements)

References 93 publications

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“…49 The existence of rGO indicates that GO has high activity as a result of its decomposition. 6,50 Furthermore, Figure 2c shows a thin-film material according to the description of the GO layers. 51 In the IR results of the purified copolymers (Figure 2d), the adsorption peaks of ∼700, ∼1700, ∼2700, and ∼1200 cm −1 belong to St, AA, and the backbone and side chains of HPEG, respectively, indicating that these monomers were synthesized on the copolymer.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The XRD pattern of GO (Figure b) shows that a strong peak is located 2θ = 12.32°, attributed to the (002) plane of GO, while the weak peak located 2θ = 22.69° is attributed to the (002) plane of reduced GO (rGO) . The existence of rGO indicates that GO has high activity as a result of its decomposition. , Furthermore, Figure c shows a thin-film material according to the description of the GO layers …”

Section: Resultsmentioning

confidence: 99%

“…For example, GO is prone to agglomeration in cement-based high-alkalinity and highcalcium environments. 6 GO agglomeration would appear on the patterns of "face-to-face" and "edge-to-edge" because the GO sheet contains a large number of carboxyl groups, resulting in the complexation between carboxyl groups at the edge of the layer and multivalent metal cations, commonly Ca 2+ or Mg 2+ , and hydrogen bonding between carboxyl groups on the layers, respectively. 7 To broaden the application field of carbon nanomaterials, especially GO, and improve their performances, such as mechanical properties, 8,9 thermal stability, 10,11 electrical conductivity, 12 etc., the dispersion of GO has become the key to determining the above properties.…”

Section: ■ Introductionmentioning

confidence: 99%

“…However, poor dispersion significantly affects its application. For example, GO is prone to agglomeration in cement-based high-alkalinity and high-calcium environments . GO agglomeration would appear on the patterns of “face-to-face” and “edge-to-edge” because the GO sheet contains a large number of carboxyl groups, resulting in the complexation between carboxyl groups at the edge of the layer and multivalent metal cations, commonly Ca 2+ or Mg 2+ , and hydrogen bonding between carboxyl groups on the layers, respectively …”

Section: Introductionmentioning

confidence: 99%

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Stability of Phenyl Copolymer–Graphene Oxide Composites in High-Alkali and/or -Calcium Environments: Implications for Strengthening and Toughening Cement-Based Materials

Wang

Zhang

Wang

et al. 2022

ACS Appl. Nano Mater.

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On the basis of their size effect and structural characteristics, carbon nanomaterials have great application potential in building materials, especially for strengthening and toughening cement-based materials. However, because of the poor dispersant of graphene oxide (GO) in cement-based materials with high-alkalinity and high-calcium content, its application in cement concrete is facing great challenges. Here, a method of self-assembling GO by phenyl polymer to achieve effective dispersion is reported. The good dispersion stability is due to hybridization between the phenyl group of the polymer and GO through noncovalent interactions, so the polymer can be anchored to the surface of the GO sheet and dispersed by steric hindrance of the side chain of poly(ethylene oxide) (PEO). The results show that when the length of the PEO side chain is constant, the phenyl content in the copolymer may not only affect the π−πstacking interaction (from offset face-to-face to edge-to-face) but also significantly affect the dispersion stability of the system. When the molar ratio of phenyl to the PEO side chain is about 2, it shows good dispersibility (i.e., the size of the self-assembled composite is the smallest). This provides reference and enlightenment for regulation of the dispersion stability of GO under severe environmental conditions.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stability of Phenyl Copolymer–Graphene Oxide Composites in High-Alkali and/or -Calcium Environments: Implications for Strengthening and Toughening Cement-Based Materials

Wang

Zhang

Wang

et al. 2022

ACS Appl. Nano Mater.

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“…Various modification methods have been employed to improve the dispersion of materials such as graphene, reduced graphene oxide (rGO), graphene oxide (GO), and carbon nanotubes (CNTs). These modification methods can be categorized into three main approaches . First, mechanical stirring or ultrasound can be used to achieve dispersion .…”

Section: Introductionmentioning

confidence: 99%

Biocompatible Reduced Graphene Oxide Ink Hybridized by Wool Keratin for Flexible Strain Sensor Electronics

Zhang,

Wu,

Chen

et al. 2024

ACS Appl. Electron. Mater.

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Ink based on nanoconductive materials can achieve the scalable fabrication of flexible devices. Nanocarbon materials, such as reduced graphene oxide (rGO), graphene oxide (GO), and carbon nanotubes (CNT), offer great potential in the field of flexible electronics. However, these materials are challenging to use in inks, especially environmentally friendly water−soluble inks, due to their poor dispersion in most solvents. In this study, a biocompatible and well-dispersed keratin-based rGO ink was fabricated consisting of keratin extracted from waste wool and rGO. The resulting noncovalent interactions, such as hydrogen bonds, π−π stacking interaction, and van der Waals forces, realized good dispersion. As an application demonstration, a flexible strain sensor was prepared by using keratin-based rGO ink, and the results demonstrated that this sensor exhibited good sensitivity (gauge factor (GF), up to 3696) and stability and could be used to monitor human health, such as pulse and abdominal breathing, as well as realize human−computer interactions such as an artificial control manipulator successfully grasping objects. Accordingly, we demonstrated a way of high-quality utilization of waste wool and the significant potential of keratin-based rGO ink-prepared waste wool in intelligent wearable devices, human−computer interaction devices, and smart living applications.

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Tungsten disulfide and reduced graphene oxide composite as efficient catalyst for the reduction of picric acid in aqueous media

Das,

Laha,

Hazarika

et al. 2024

J Mater Sci

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Dispersion of graphene oxide and its application prospect in cement-based materials: a review

Cited by 9 publications

References 93 publications

Stability of Phenyl Copolymer–Graphene Oxide Composites in High-Alkali and/or -Calcium Environments: Implications for Strengthening and Toughening Cement-Based Materials

Stability of Phenyl Copolymer–Graphene Oxide Composites in High-Alkali and/or -Calcium Environments: Implications for Strengthening and Toughening Cement-Based Materials

Biocompatible Reduced Graphene Oxide Ink Hybridized by Wool Keratin for Flexible Strain Sensor Electronics

Tungsten disulfide and reduced graphene oxide composite as efficient catalyst for the reduction of picric acid in aqueous media

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