Zeta Potential of Nanosized Particles of Cellulose as a Function of pH

In this work dispersions of nanodimensional particles of cellulose were obtained, and their zeta potential at pH values from 1 to 14 was determined. It was established that cellulose nanofibrils (CNF) retains its sedimentation stability at pH values from 3 to 11. Here CNF obtained by acid treatment with homogenization has a maximum zeta potential of about – 62 mV at pH = 6. CNF obtained by oxidative treatment with homogenization has maximum zeta potential of about –46 mV at pH = 7. Cellulose nanocrystals obtained by oxidative treatment with homogenization retains its sedimentation stability at pH values from 4 to 11 and has a maximum zeta potential of about –73 mV at pH = 4.