Polyamic acid, the precursor of polyimide, was used for the preparation of polyimide/multiwalled carbon nanotubes (MWCNTs) nanocomposite films by solvent casting technique. In order to enhance the chemical compatibility between polyimide matrix and MWCNTs, the latter was surface modified by incorporating acidic and amide groups by chemical treatment with nitric acid and octadecylamine (C18H39N)...

Despite their wide applications, lithium-ion batteries (LIBs) have been struggling with safety risks arising from different lifetime stages. Here, the NCMA pouch cell is taken as an example, and of both fresh aged cells three milestone stages, that is, internal short circuit (ISC) triggering risk, ISC mode, subsequent thermal runaway (TR) consequence investigated. By combining mechanical abusiv...

Cold rolling process in metal could increase its strength and hardness, but also induces mechanical anisotropy. This is caused by unresolved plastic strain microstructural changes deformation exerted pair of rolls at a relatively low temperature. research aims to provide understandings on anisotropic rate sensitive behaviour St-37 mild steel. The microstructure rolled unrolled plate were observ...