Fig. 1From: Palm kernel oil-based polyester polyurethane composites incorporated with multi-walled carbon nanotubes for biomedical applicationEffect of increasing sonication time on the UV–visible absorption spectrum at 600 nm of palm kernel oil-polyester (PKO-p) dispersion containing 0.01 wt.  %, 0.04 wt.  %, and 0.08 wt.  % MWNTsBack to article page