C-CNF Surface Modified Tourmaline and its Dispersion Stability

This is an article in the field of mineral processing engineering. Tourmaline has been widely used for its spontaneous polarity, pyroelectric effect, far-infrared radiation and negative-ion release effect. In order to increase its stability in water-based coatings and improve its performance in water-based coatings, in this work, the surface modification of tourmaline with carboxylated nanolocellulose (C-CNF) was studied and optimized. The test results show that the performance of modified tourmaline was optimal while the addition of C-CNF was 2 g, solid-to-liquid ratio 1:5, and reacted 2h at 50 ℃, its turbidity reached 1361 ntu, contact angle to 53o. It was found that C-CNF was successfully grafted to the tourmaline surface by means of characterization of the modified tourmaline, and the dispersion of the modified tourmaline in the aqueous medium was better improved.