Characterization and In Vitro Sustained Release of Silibinin from pH Responsive Carbon Nanotube-Based Drug Delivery System

Table 1

The properties of the commercial multiwalled carbon nanotubes provided by the manufacturer.

Properties	Short carboxyl multiwalled carbon nanotubes (COOH-MWCNTs)
Outside diameter (nm)	20–30
Length (μm)	0.5–2.0
COOH content (wt.%)	1-2
Purity (wt.%)	>95
Ash (wt.%)	<1.5