Novel fluorosilicone surfactant modified nanometer calcium carbonate powder with controllable morphology and preparation method thereof

Abstract

The invention discloses a novel fluorosilicone surfactant modified nanometer calcium carbonate powder with controllable morphology and a preparation method thereof. According to the invention, a mixture of ionic liquid and deionized water is used as a solvent; the calcium carbonate powder with controllable morphology and better performance is prepared by using a carbonization process on the basis of unique carbon dioxide adsorptivity of the ionic liquid; a novel fluorosilicone surfactant is synthesized by using an addition reaction of hydroxyl fluoro-silicone oil with allyl polyoxyethylene ether, and the synthesized novel fluorosilicone surfactant has good hydrophilicity and lipophilicity; an emulsion formed by compounding of the novel fluorosilicone surfactant and sodium dodecanesulphonate has excellent emulsification and dispersion effect, so the lipophilicity of the surface of the calcium carbonate powder is effectively improved and affinity of the calcium carbonate powder to organic matters is improved; moreover, the surfactant has good heat stability and exerts no adverse influence on a resin matrix, so the modified nanometer calcium carbonate powder has more excellent filling and modification effect.

Description

technical field [0001] The invention relates to the technical field of modified calcium carbonate, in particular to a novel fluorosilicon surfactant-modified nanometer calcium carbonate powder with controllable morphology and a preparation method thereof. Background technique [0002] Calcium carbonate powder is a very common inorganic material, which is mainly used as a reinforcing filler in papermaking, rubber, plastics, coatings, inks and other products. Most of the calcium carbonate fillers used in actual use are micron-scale or even nano-scale products. These micro-scale calcium carbonate fillers have high surface energy, poor dispersion in the matrix, and easy agglomeration, which seriously affects filling improvement. In order to improve its performance, it is necessary to carry out surface modification treatment on it. [0003] At present, most of the commercially available nano-calcium carbonate powders use stearic acid or fatty acid salts for dry coating modificat...

AI Technical Summary

Problems solved by technology

Most of the calcium carbonate fillers used in actual use are micron-scale or even nano-scale products. These micro-scale calcium carbonate fillers have high surface energy, poor dispersion in the matrix, and easy agglomeration, which seriously affects filling improvement. Sexual effect, it needs to be surface modified to improve its performance

[0003] At present, most of the commercially available nano-calcium carbonate powders use stearic acid or fatty acid salts for dry coating modification treatment. Although the powders obtained by these types of treatment methods have improved in terms of dispersibility, oil absorption value, and activation degree, etc. A certain improvement, but due to its poor temperature resistance, it is not suitable for high-temperature processing environments, and it will have adverse effects on the filled matrix material, and the scope of use is effective

In the article "Surface Modification of Nano Calcium Carbonate by Composite Modifiers", the compound product of lauric acid and dioctyl / capric glyceryl polyoxyethylene ether was used for wet modification of nano calcium carbonate. Calcium carbonate powder is not easy to agglomerate, the degree of surface activation is improved, the hydrophobicity is improved, and the temperature resistance is better, which avoids the defects of stearic acid modifiers. The scope of use of calcium carbonate powder after characterization is still limited, which is not a satisfactory modification treatment result