Table 1.

Contact angle and zeta potential as a function of pH for DuPont-FilmTec (Edina, MN, USA) XLE membrane at constant, 10 mM sodium chloride solution. Used with Permission of Elsevier B.V. [40].

pH (Standard Units)	Contact Angle (Degrees)	Zeta Potential (mV)
3	62 ± 2.4	+20.6
5	61 ± 2.8	−12.7
7	55 ± 1.8	−30
9	47 ± 1.4	−38.8
10	45 ± 1.2	−41.5
11	44 ± 0.7	ND

ND: not determined.