Zeta potential study of biodegradable antimicrobial polymers

- Electrokinetic potential (ζ) vs pH of three biodegradable polymers is described.
- The polymers were poly(hydroxybutyric acid) (PHB), polycaprolactone (PCL) and poly(lactic acid) (PLA).
- They were doped with antimicrobial polyhexamethylene guanidine hydrochloride (PHMG) derivatives.
- ζ was determined from streaming current data using Smoluchowski-Helmholtz model.
- Addition of PHMG increases surface charge of the biodegradable polymers.