57 results about "Reflectance factor" patented technology

The invention discloses a method and a device for acquiring the streaming potential of a nanofiltration film and relates to an analyzing method for separating the streaming potential from the measured transmembrane potential. The invention measures the transmembrane potential, pressure difference, flux and rejection rate, implements nonlinear least squares fitting on the rejection rate and the flux according to the Spiegler-Kedem equation, thus acquiring the reflectance, furthermore, pressure difference of the hierarchy is treated as the tag pressure difference when the rejection rate approaches the reflectance, and the invention implements linear fitting on the measured pressure difference which exceeds the tag pressure difference and the corresponding transmembrane potential, the size of the slope coefficient is taken as the streaming potential. The measurement device comprises a thermostatic bath, a liquid storage bath, a constant flow pump and a membranous device; wherein, the liquid storage bath is positioned inside the thermostatic bath, the constant flow pump, the liquid storage bath and the membranous device are connected with each other through nonmetallic catheters, a pressure gauge, a potentiometer and a flowmeter are connected at two sides of the membranous device. The method and the device provided by the invention can successfully separate the streaming potential from the transmembrane potential and provide data support for representing the electrical property and the separability of the nanofiltration film.