Aggregation size effect of graphene oxide on its reinforcing efficiency to cement-based materials

2019 ◽  
Vol 100 ◽  
pp. 85-91 ◽  
Author(s):  
Zeyu Lu ◽  
Binmeng Chen ◽  
ChristopherK.Y. Leung ◽  
Zongjin Li ◽  
Guoxing Sun
Keyword(s):  
Graphene Oxide ◽  
Size Effect ◽  
Cement Based Materials ◽  
Aggregation Size

scholarly journals Cement-Based Materials Containing Graphene Oxide and Polyvinyl Alcohol Fiber: Mechanical Properties, Durability, and Microstructure

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 638 ◽  
Author(s):  
Wenguang Jiang ◽  
Xiangguo Li ◽  
Yang Lv ◽  
Mingkai Zhou ◽  
Zhuolin Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Flexural Strength ◽  
Polyvinyl Alcohol ◽  
Mechanical Strength ◽  
Mechanical Performance ◽  
Control Sample ◽  
Corrosion Condition ◽  
Cement Based Materials ◽  
Strength And Durability ◽  
Pva Fiber

The influence of graphene oxide (GO) and polyvinyl alcohol (PVA) fiber on the mechanical performance, durability, and microstructure of cement-based materials was investigated in this study. The results revealed that compared with a control sample, the mechanical strength and durability of cement-based materials were significantly improved by adding PVA fiber and GO. The compressive and flexural strength at 28 d were increased by 30.2% and 39.3%, respectively. The chloride migration coefficient at 28 d was reduced from 7.3 × 10−12 m2/s to 4.3 × 10−12 m2/s. Under a sulfate corrosion condition for 135 d, the compressive and flexural strength still showed a 13.9% and 12.3% gain, respectively. Furthermore, from the Mercury Intrusion Porosimetry (MIP) test, with the incorporation of GO, the cumulative porosity decreased from more than 0.13 cm3/g to about 0.03 cm3/g, and the proportion of large capillary pores reduced from around 80% to 30% and that of medium capillary pores increased from approximately 20% to 50%. Scanning electron microscope (SEM) images showed a significant amount of hydration products adhering to the surface of PVA fiber in the GO and PVA fiber modified sample. The addition of GO coupling with PVA fiber in cement-based materials could promote hydration of cement, refine the microstructure, and significantly improve mechanical strength and durability.

Three-dimensional bandgap-tuned Ag2S quantum dots/reduced graphene oxide composites with enhanced adsorption and photocatalysis under visible light

2018 ◽  
Vol 8 (20) ◽  
pp. 5225-5235 ◽  
Author(s):  
Qian Wu ◽  
Ming Zhou ◽  
Yu Gong ◽  
Qijun Li ◽  
Mingyang Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Size Effect ◽  
Visible Light ◽  
Three Dimensional ◽  
Quantum Size ◽  
Reduced Graphene ◽  
Ag2s Quantum Dots ◽  
Enhanced Adsorption ◽  
Oxide Composites

Tuning Ag2S bandgap by quantum size effect and incorporation with rGO to form a three-dimensional composite enhances adsorption and photocatalysis under visible-light.

Size Effect of Graphene Oxide on Modulating Amyloid Peptide Assembly

2015 ◽  
Vol 21 (27) ◽  
pp. 9632-9637 ◽  
Author(s):  
Jie Wang ◽  
Yunpeng Cao ◽  
Qiang Li ◽  
Lei Liu ◽  
Mingdong Dong
Keyword(s):  
Graphene Oxide ◽  
Size Effect ◽  
Amyloid Peptide ◽  
Peptide Assembly

The surface plasmon resonance, thermal, support and size effect induced photocatalytic activity enhancement of Au/reduced graphene oxide for selective oxidation of benzylic alcohols

2017 ◽  
Vol 19 (46) ◽  
pp. 31389-31398 ◽  
Author(s):  
Yanhui Zhang ◽  
Hongxu Guo ◽  
Wen Weng ◽  
Ming-Lai Fu
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Surface Plasmon Resonance ◽  
Size Effect ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Size Effects ◽  
Benzylic Alcohols ◽  
Reduced Graphene ◽  
Activity Enhancement

The SPR, thermal, support, and size effects of Au/RGO are demonstrated to play an important role in enhancing the photocatalytic activity.

scholarly journals Carbon nanomaterials enhanced cement-based composites: advances and challenges

2020 ◽  
Vol 9 (1) ◽  
pp. 115-135 ◽  
Author(s):  
Mingrui Du ◽  
Hongwen Jing ◽  
Yuan Gao ◽  
Haijian Su ◽  
Hongyuan Fang
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Graphene Oxide ◽  
Ordinary Portland Cement ◽  
Carbon Nanomaterials ◽  
Physical And Mechanical Properties ◽  
Comprehensive Review ◽  
Reduced Graphene ◽  
Cement Based Materials ◽  
Graphene Nanoplates

AbstractCarbon nanomaterials, predominantly carbon nanofibers, carbon nanotubes, graphene, graphene nanoplates, graphene oxide and reduced graphene oxide, possess superior chemical, physical and mechanical properties. They have been successfully introduced into ordinary Portland cement to give enhancements in terms of mechanical properties, durability and electrical/thermal conductivity, and to modify the functional properties, converting conventional cement-based materials into stronger, smarter and more durable composites. This paper provides a comprehensive review of the properties of carbon nanomaterials, current developments and novel techniques in carbon nanomaterials enhanced cement-based composites (CN-CBCs). Further study of the applications of CN-CBCs at industrial scale is also discussed.

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