Analysis on Viscosity and Stability of Chinese Ink Nanofluids

Abstract

Chinese ink nanofluids were prepared successfully by “two-step” method. The optical properties of Chinese ink nanofluids were investigated. And the effects of the base fluid types and ultrasonic time on their dispersion stability also were investigated. Results show that Chinese ink have high absorption characteristics and very low transmittance on light radiation in the wavelength range of 190-1100 nm; The dispersion stability of nanofluids increases first and then decreases with the increase of ultrasonic dispersion time. There is an optimal ultrasonic dispersion time of 90 min; the base fluid has a certain influence on the dispersion stability of Chinese ink nanofluid, among which DMF base solution has the best dispersion stability, followed by thermal conductive oil. Ethanol has no obvious improvement compared with water, both of which have lower dispersion stability than DMF and thermal conductive oil. This research provides a fundamental guidance for the preparation of Chinese ink nanofluids and their further application in Solar photo-thermal conversion.