Shape-controlled nano calcium carbonate powder modified by cardanol polyoxyethylene ether composite treatment agent and preparation method of shape-controlled nano calcium carbonate powder

Abstract

The invention discloses a shape-controlled nano calcium carbonate powder modified by a cardanol polyoxyethylene ether composite treatment agent and a preparation method of the shape-controlled nano calcium carbonate powder. Ion liquid/deionized water is compounded as a solvent, by utilizing the unique adsorption performance of the ion liquid for carbon dioxide, the calcium carbonate powder with controllable shape and excellent performance is prepared by virtue of a carbonization method, a novel grafted hyperbranched polysiloxane cardanol polyoxyethylene ether surface active agent is prepared by utilizing hydrosilylation reaction, the active agent has excellent thermal stability and compatibility with a resin system, and the modified nano calcium carbonate powder is good in dispersity and hydrophobicity, and also has no adverse influence on resin under a high heat situation.

Description

technical field [0001] The invention relates to the technical field of modified calcium carbonate, in particular to a nano calcium carbonate powder with controllable morphology modified by a cardanol-based polyoxyethylene ether composite treatment agent 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...

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