The average properties of a polymer composite depends on the size and properties of the interface/interphase region in the vicinity of the reinforcing filler. Hybrid composite having partly concentrated and partly dispersed interphase region. The incorporation of CNTs significantly changes the size and properties of interphase, and also affects the interfacial chemistry and microstructure in multiscale and hybrid composites while transition is also gradual in an interphase region of finite thickness in CNT reinforced CFRPs as compared to conventional CFRPs. Thus, the presence of an interphase region eliminates stress concentration around the filler material. 

Related Publications:

1. Harpreet Singh Bedi, Beant K Billing and Prabhat K. Agnihotri, “Interfacial shear strength of carbon nanotubes based hybrid composites: effect of loading rate”, Fracture and Structural Integrity, 2019.

2. Harpreet Bedi, Mayank Tiwari and Prabhat K Agnihotri,“Quantitative determination of size and properties of interphase in carbon nanotube based hierarchical composites”, Carbon, 132 (2018), 181-190.

3. Harpreet Singh Bedi and Prabhat K Agnihotri. "Designing the interphase in carbon fiber polymer composites using carbon nanotubes". Procedia Structural Integrity, 14 (2019): 168-175.