Preparation and Properties of Novel Fluoroalkyl End-capped Oligomers/Hydrogarnet Nanocomposites

Abstract

Novel fluoroalkyl end-capped oligomers/hydrogarnet (katoite) nanocomposites were prepared by the hydrothermal reactions of a stoichiometric mixture of Ca(OH)₂, Al(OH)₃, and Al₂Si₂O₅(OH)₄ in the presence of the corresponding fluorinated acrylic acid, acryloylmorpholine, and N,N-dimethylacrylamide oligomers. These fluorinated katoite nanocomposites thus obtained are nanometer size-controlled, and were found to exhibit a good dispersibility in water, methanol, ethanol, and tetrahydrofuran. Fluoroalkyl end-capped oligomers were also applied to the dispersion of parent katoite into these solvents; however, a poor dispersiblity for these solvents was observed. On the other hand, fluoroalkyl end-capped 2-methacryloyloxyethanesulfonic acid oligomer [R_F—(MES)_n—R_F] was able to solubilize katoite into water to afford the transparent colorless solution. The obtained R_F—(MES)_n—R_F/katoite nanocomposites were found to exhibit a good antibacterial activity against Staphylococcus aureus, and were also applied to the surface modification of poly(vinyl alcohol) to exhibit a good oleophobicity imparted by fluorine on the surface.

Keywords

hydrogarnet katoite nanocomposites fluorinated oligomer dispersion solubility antibacterial activity TEM XRD oleophobicity surface modification.

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