Modification of dual-component fibrous materials with carbon nanotubes and methyltrichlorosilane

Abstract

Dual-component fibrous materials were produced by co-extrusion and multiplication technology in combination with a water jet procedure. High density polyethylene/poly(vinylidene fluoride) (HDPE/PVDF) and polypropylene/high density polyethylene (PP/HDPE) systems were obtained. Modification of these fibrous materials with multiwall carbon nanotubes imparted electrical conductivity. Methyltrichlorosilane treatment permitted to reach superhydrophobicity reflected in a water contact angle (WCA) ≥ 160°. Both types of modification decreased a pore size of HDPE/PVDF fibrous material and strongly increased its surface area. The material subjected to both treatments possess pore size of 3.1 μm. This electrically conductive and superhydrophobic HDPE/PVDF fibrous material is characterized by WCA of 164° and low surface resistivity of 87.4 Ω/sq. Electrochemical modification using cyclic voltammetry resulted in the formation of silver nanoparticles (Ag°) on surfaces of the fibers, which imparted antibacterial properties against Staphylococcus aureus and Escherichia coli. Keywords: Smart materials, Dual-component fibrous materials, Lotus effect, Multiwall carbon nanotubes, Cyclic voltammetry