Hi,
Presented carboxyl group on the wall of carbon nanotubes (CNTs) lead to break down bundles CNTs and improve its dispersion in the solution. but am wondering if this functional group affect the bond between CNTs and the host matrix?
Hi Salam, I cannot tell you how, but I am quite sure that the functionalization can affect the interaction between CNTs and the host matrix. Obviously, the effect should depend on the type of functional groups (i.e. COOH in your case) and the matrix you use.
In preparing a composite material, the interface host-guest contact is fundamental. You should also consider the possibility of using surfactant or polymer as dispersant. It is important to check the effect of the different functionalizations.
It is said that the carboxyl group can enhance the bonding between CNT and cement matrix, but this effect is not significant at all. As proven in one of my works, https://www.researchgate.net/publication/257563531_Interactions_between_organic_and_inorganic_phases_in_PA-_and_PUPA-modified_cement-based_materials , carboxyl groups in polymer latex can react with cement hydrate to form new products. But how this reaction can enhance mechanical properties has not been shown. As I know, some are trying to using alcohol-based polymer to enhance the mechanical properties of CNT(-COO)-cement composite, as a potential -COOC- reaction is expected to enhance the interface...
Article Interactions between Organic and Inorganic Phases in PA- and...
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