graphene in concrete
Several trials have taken place in the UK and the University of Melbourne with CGT’s Graphene Oxide to enhance both construction and road applications. The addition of graphene derivatives can improve several features of cement composite as mentioned below:
◆ Improved compressive and flexural strength
◆ The incorporation of aggressive agents within the cement matrix and improve the resistance to carbonation, frost and calcium leaching of cement composite.
◆ Graphene Oxide on cement composites includes the promotion of cement hydration, the refined pore structure, the compact microstructure and the interfacial bonding with the matrix.
◆ Can bring certain smart properties and multi-functionality such as EMI shielding, effectiveness, electrical conductivity, thermal conductivity etc.
OUTSTANDING PERFORMANCE OF CGT GRAPHENE FOR CO2 CAPTURING
The current rise in the average global temperature is attributed to the increase in CO2 and other greenhouse gases due to man-made activity, leading to dramatic climate and ecological changes. The capturing of CO2 from the atmosphere or their emission from waste industrial gases or cars is an area that has undergone extensive research involving many new materials and new technologies.
At CGT, we have recognized the importance of addressing this global problem. And in collaboration with Prof. Dusan Losic and his team at the University of Adelaide Australia, we are working on using CGT graphene materials for advanced CO2 adsorption. This research aims to develop advanced recyclable graphene adsorbents able to capture CO2 with high efficiency that can be packed, released and used for different applications. The team is making sustainable progress with the development of two new products for CO2 adsorption which are currently under testing and showing very promising results. Highly porous rGO adsorbent (SSA ca 800 g/m2) with specific nano-lamellar porous architecture is designed that can provide very fast and high-capacity CO2 adsorption between > 3.7 mmol/g at room temperature and normal pressure. The second product under development is an rGO-modified commercial foam that has slightly lower CO2 adsorption performance (ca 3.2 mmol/g) but has the benefits of using less rGO material and the flexibility for designing simple and low-cost adsorption filters. Initial testing results by the University of Adelaide team (see below) are overperforming many other CO2 commercial adsorbents (activated carbon and molecular sieves