Engineering a safe and high-efficiency delivery system for efficient RNA interference is critical for successful gene therapy. In this study, we designed a novel nanocarrier system of polyethyleneimine (PEI)-modified Fe3O4@SiO2, which allows high efficient loading of VEGF small hairpin (sh)RNA to form Fe3O4@SiO2/PEI/VEGF shRNA nanocomposites for VEGF gene silencing as well as magnetic resonance...

Abstract Polymer dielectrics with excellent energy storage performance at high temperature are urgently needed in advanced applications, such as hybrid electric vehicles, smart grid and pulsed power sources. Polyetherimide (PEI), which is supposed to be the most promising candidate among polymer dielectric materials, displays a limitation for high‐temperature owing rapidly decreasing discharged...

Abstract The present work is concerned with adhesive bonding of thermoplastic composites used in general aerospace applications, including polyphenylene sulfide (PPS), polyetherimide (PEI) and polyetheretherketone (PEEK) carbon fibre composites. Three different surface treatments have been applied to the PEEK, PPS PEI-based order enhance adhesion: atmospheric plasma, ultraviolet radiation (UV) ...

Abstract The present work aims for an initial computational simulation with finite element analysis of the friction riveting process. Knowledge and experimental data from AA2024-T351 polyetherimide supported simulation. Friction is a friction-based joining technology capable connecting multiple dissimilar overlapping materials in fast simple manner. In this paper, plastic deformation metallic r...

With the realization of larger and more complex space installations, an increase in surface area exposed to atomic oxygen (AO) ultraviolet (UV) effects is expected, making structural integrity structures essential for future development. In a low Earth orbit (LEO), AO UV degradation can have devastating consequences polymer composite satellites installations. Composite materials such as carbon ...

In this research, process asymmetric polyetherimide hollow fiber membranes using ethanol (0, 2 and 4 wt%) as non-solvent additive in the polymer dope via phase inversion method were fabricated. Aqueous solution of 1-methyl-2-pyrrolidine (NMP) (90%) was applied as a bore fluid to avoid inner skin layer formation and water was used as the external coagulant. The morphology of fabricated membranes...