Abstract
The preparation of nanocomposites with controllable structure is important. There are few reports on preparation of ultrashort composite nanotubes with core–shell structure from long nanotubes, and how to maintain structural integrity and to avoid shell falling off or damaging are still challenging. Here we prepare ultrashort core–shell composite nanotubes with the outer layer of SiO2 or TiO2 and the inner layer of sulfonated PDVB by mixing their long composite nanotubes with polymer resin and shearing at a high strength with a twin-screw extruder. By contrast, using ultrasonic crushing or mechanical stirring to interrupt the composite nanotubes can destroy the SiO2 or TiO2 outer layer seriously. The method of preparing ultrashort composite nanomaterials by twin-screw extruders is very promising in the field of nanocomposite processing.
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