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Highlights • CNTs and CNFs are both the nano-structured fibrous materials with excellent properties. • The dispersion of CNTs/CNFs is the decisive factor affecting the performance of composites. • The incorporation of CNTs and CNFs affects the variety performance of cement-based materials. • CNTs/CNFs-modified cement-based composites have broad application prospects. Abstract CNTs and CNFs are drawing widespread attention due to the unique structure and excellent properties, such as the mechanical property and the electrical property. It will significantly improve the cement-based composites' properties when adding CNTs/CNFs into composites. This paper briefly introduces the CNTs'/CNFs' basic properties and dispersion methods, and elucidates the properties of cement-based composites recombining CNTs/CNFs, including the mechanical property, the deformation property, the durability property, the thermal conductivities and electrical conductivities. This paper also summarizes the problems existing in present research, and gives some proposes for future study. [ABSTRACT FROM AUTHOR]

Epoxy‐amine system is a type of important matrix material for preparation of carbon fiber composites. The amidation of carbon nanotubes (CNTs) has been widely developed for enhancing the mechanical properties of the epoxy resin matrix. However, the various amino‐functionalized CNTs will produce different effect in the same epoxy matrix due to the diversity in reactivity, compatibility, and dispersion stability. In this paper, the amino‐functionalized multiwalled carbon nanotubes (MWCNTs‐NH2) were prepared through surface grafting ethylenediamine and diethyltoluenediamine (DETDA; designated as MWCNTs‐EDA and MWCNTs‐DETDA), and dispersed into epoxy resin matrix in which the DETDA was also used as curing agent. Compared with MWCNTs‐EDA, the MWCNTs‐DETDA showed a better dispersion state and stability in the epoxy resin, and had a relatively small impact on the curing behavior of epoxy matrix. After adding 0.5 wt% MWCNTs‐DETDA, the unidirectional T700 carbon fiber composites exhibited the significantly enhanced interlaminar shear strength and flexural properties due to the uniform dispersion of MWCNTs‐DETDA and the modified interface bonding. The results indicated that the chemical compatibility between MWCNTs‐NH2 and resin matrix can exert an important influence on the microstructure, curing behavior, thermo‐mechanical properties, and mechanical properties of the epoxy resin and the resulting carbon fiber composites. POLYM. COMPOS., 39:E733–E744, 2018. © 2016 Society of Plastics Engineers [ABSTRACT FROM AUTHOR]