Abstract
This work aims to study the Influences of tea pigment on the properties of Hydroxypropylmethelcellelose HPMC. Two solutions were prepared; one of them involve: dissolved 0.3 of HPMC in 50 ml of double distillation water with constant stirring via a magnetic mixer. The material will clump and then heated to 80° C until it becomes viscous, cooled and leave disparately for 30 min. Different tests were carried out, such as Osmosmality, cured animal, rheology, zeta potential, density, PH and FTIR. Findings demonstrated that the preservative material acts as a cationic surfactant and as a biocide agent and causes Influences, such as decreasing the oscillatory from 287 to 283 Osm/L, from 6.6 to 6.44, increasing the zeta potential from −20 to −31 mV and mobility from −1.8 to −2.1 (m/s)/(V/cm). From the viewpoint of rheology characteristics, benzalkonium chloride addition makes the viscosity–shear rate relation closer to the standard tear behaviour with shear thinning behaviour.
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