The effect of ultrasound on the application properties of organic pigment (red 48:1) and inorganic pigments (lemon yellow and orange yellow lead chromate)

Abstract

In the recent years, the pigment industry, as a mother industry in the field of color matching, has had many applications and has greatly contributed to the progress of other industries such as textile, dyeing, glazing, construction and industrial paints, compounding, etc. For more optimal use in different industries, paying enough attention to the physical and chemical properties of pigments would be necessary. One of the most effective research projects in this field is the investigation of the effect of ultrasound radiation on the applied properties of pigments. In this research, by irradiating different times of ultrasound on the samples of organic pigment (red 48:1) and inorganic pigments (lemon yellow TL210 and orange yellow TM110 lead chromate) in the aqueous phase, the practical and visible effects were investigated on them. After ultrasonic irradiation on the selected pigments, some color test strips were prepared in a specialized paint laboratory, and they were tested with a spectrophotometer and a graindometer. The results of this research showed the great effect of ultrasound radiation on the reduction of the size of pigment particles and the increase of the opacity and coverage of the pigment, and also the increase of its resistance to sunlight; nevertheless, other properties such as water test, alkaline and acid test and thermal resistance test were not affected by ultrasound. Simultaneous application of dispersant with ultrasound resulted in further improvement of the mentioned properties. Based on the results of this research, paint and pigment companies might use ultrasonic radiation with appropriate probes along with different dispersants in their production line so as to increase production efficiency.