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Interfacial Nanoparticle Complexation of Oppositely Charged Nanocelluloses into Functional Filaments with Conductive, Drug Release or Antimicrobial Property.

Construction of colloidal nanoparticles into advanced functional nanocomposites and hybrids with pre-designed hierarchical structure and high-performance is attractive, especially for natural biological nanomaterials, such as proteins and polysaccharides. Herein, a simple and sustainable approach called interfacial nanoparticle complexation (INC) was applied to construct diverse functional (conductive, drug-loaded or antimicrobial) nanocomposite filaments from oppositely charged colloidal nanocelluloses. By incorporating different additives during the INC process, including multi-walled carbon nanotube, an antitumor drug (doxorubicin hydrochloride, DOX), and metal (silver) nanoparticles (Ag NPs), high-performance functional continuous filaments were synthesized and their potential applications in electronics, drug delivery and antimicrobial materials were investigated, respectively. This novel INC method based on charged colloidal nanoparticles opens new avenues for building various functional filaments for a diversity of end-uses.