Modification method of negative-ion mineral powder with reaction activity

Abstract

The invention provides a modification method of negative-ion mineral powder with reaction activity. The method specifically comprises steps as follows: negative-ion mineral powder is subjected to purification, activation, grinding and heat treatment for use; 100 parts of the negative-ion mineral powder by weight are added to 100-500 parts of an acetone solvent, the mixture is stirred at the speed of 30-100 r / min for 30-60 min, then 3-10 parts of isocyanate are added at the flow speed of 1-5 g / min, the mixture reacts at the temperature of 40-80 DEG C for 3-5 h, the acetone solvent is recovered through reduced-pressure distillation, and the isocyanate-modified negative-ion mineral powder with the reaction activity is obtained. The modified negative-ion mineral powder can participate in formation of molecular chains of polymers, has the reaction activity of the isocyanate and can participate in synthetic reactions of the polymers, so that the negative-ion mineral powder is organically combined in the molecular chains of the polymers, and the phenomenon that negative ions are not dispersed uniformly due to conventional adding methods is eliminated.

Description

technical field [0001] The invention provides a method for modifying negative ion mineral powder with reactivity, and belongs to the application field of inorganic powder modification. Background technique [0002] Negative ion mineral powder has obvious piezoelectricity and pyroelectricity. Changes in the surrounding environmental conditions will cause the mineral powder to generate a potential difference to stimulate negative ions. Negative ions can regulate and improve the human body. They are known as vitamins in the air. Based on the advantages of negative ions, people are constantly developing various functional materials that can release negative ions, and more and more attention has been paid to negative ion materials that are beneficial to health. For example, the patent CN201010198148 Yanshan University discloses "Preparation of a negative ion-releasing coating material", and a seagull stone negative ion additive is added to the resin formula to prepare a negative ...

AI Technical Summary

Problems solved by technology

These methods of adding negative ion mineral powder to the polymer are all to carry out surface treatment to the negative ion mineral powder, and then add the modified negative ion mineral powder to the polymer system, which has caused the gap between the negative ion mineral powder and the polymer. It is only the interaction between molecules, not the organic integration of anion mineral powder in the polymer molecular chain, which leads to the detachment of anion mineral powder and polymer over time, resulting in the negative ion release function of the material The phenomenon of attenuation with the passage of time; at the same time, there is also the phenomenon of uneven dispersion of negative ions