Supercharge Your Innovation With Domain-Expert AI Agents!

A method for surface modification of nano-calcium carbonate with particle size less than 20nm

A technology for nano-calcium carbonate and surface modification, which is applied in the direction of nanotechnology, nanotechnology, and nanotechnology for materials and surface science. It can solve difficult problems such as nano-calcium carbonate modification, and achieve reliable and effective solutions. Effect of small, low hydroxyl content

Active Publication Date: 2021-11-16
广东德晟新材料科技有限公司
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses modifiers such as stearic acid. Since fatty acids easily form micron-sized micelles in aqueous media, this method is difficult to apply to the modification of nano-calcium carbonate with a particle size of less than 20nm.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for surface modification of nano-calcium carbonate with particle size less than 20nm
  • A method for surface modification of nano-calcium carbonate with particle size less than 20nm
  • A method for surface modification of nano-calcium carbonate with particle size less than 20nm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for surface modification of nano-calcium carbonate with a particle diameter less than 20nm, comprising the following steps:

[0035] 1) The average particle size is 18nm, the BET specific surface area is 117m 2 The nanometer calcium carbonate of / g adds water dispersion and makes the suspension of mass fraction 10%, then the suspension is transferred to reactor;

[0036] 2) Add barium chloride with 0.5% of the quality of nano-calcium carbonate into the reaction kettle, and stir for 30 minutes;

[0037] 3) Add polyethylene glycol with 5% nano-calcium carbonate quality into the reaction kettle, the number-average molecular weight of polyethylene glycol is 700g / mol, heat up to 85°C, and stir at constant temperature for 90min;

[0038] 4) Add sodium hydroxide to the reaction kettle to adjust the pH of the reaction solution in the reaction kettle to 9.5, then add itaconic acid with 4% nanometer calcium carbonate quality, stir for 25min, then add 0.05% nanometer cal...

Embodiment 2

[0040] A method for surface modification of nano-calcium carbonate with a particle diameter less than 20nm, comprising the following steps:

[0041] 1) The average particle size is 14nm, the BET specific surface area is 134m 2 The nanometer calcium carbonate of / g adds water dispersion and makes the suspension of mass fraction 10%, then the suspension is transferred to reactor;

[0042] 2) Add barium chloride with 1% nano-calcium carbonate quality into the reaction kettle, and stir for 30 minutes;

[0043] 3) Add polyethylene glycol with 8% nano-calcium carbonate quality into the reaction kettle, the number-average molecular weight of polyethylene glycol is 800g / mol, heat up to 85°C, and stir at constant temperature for 90min;

[0044] 4) Add sodium hydroxide to the reactor to adjust the pH of the reaction solution in the reactor to 9.5, then add itaconic acid with a mass of 6% of nano-calcium carbonate, stir for 25 minutes, and then add N,N-dicarbonate with a mass of 0.05% o...

Embodiment 3

[0046] A method for surface modification of nano-calcium carbonate with a particle diameter less than 20nm, comprising the following steps:

[0047] 1) The average particle size is 16nm, the BET specific surface area is 126m 2 The nanometer calcium carbonate of / g adds water dispersion and makes the suspension of mass fraction 10%, then the suspension is transferred to reactor;

[0048] 2) Add barium chloride with a quality of 0.8% of nano-calcium carbonate into the reactor, and stir for 30 minutes;

[0049] 3) Add polyethylene glycol with 8% nano-calcium carbonate quality into the reaction kettle, the number-average molecular weight of polyethylene glycol is 900g / mol, heat up to 85°C, and stir at constant temperature for 90min;

[0050]4) Add sodium hydroxide to the reactor to adjust the pH of the reaction solution in the reactor to 9, then add itaconic acid with a mass of 5% of nano-calcium carbonate, stir for 25 minutes, and then add N,N-Di Methpropylamine and dibenzoyl p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for surface modification of nano-calcium carbonate with a particle diameter of less than 20nm, which comprises the following steps: 1) adding water to disperse the nano-calcium carbonate with a particle diameter of less than 20nm to prepare a suspension; 2) adding soluble barium salt, and carrying out Stir; 3) Add polyethylene glycol, heat up to 70°C to 90°C, and stir; 4) Add itaconic acid, stir, then add N,N-dimethylpropylamine and dibenzoyl peroxide, 70 ℃~90℃ for reaction, then add aluminum isopropoxide and continue the reaction to obtain modified nano-calcium carbonate. The method of the present invention can effectively solve the problem of agglomeration of nano-calcium carbonate with a particle size of less than 20nm without additional equipment investment and transformation, the scheme is reliable and effective, the investment is small, the degree of industrialization is high, and the particle dispersion state of the obtained modified nano-calcium carbonate is good. , the surface hydroxyl content is low.

Description

technical field [0001] The invention relates to the technical field of surface modification of inorganic fillers, in particular to a method for surface modification of nano-calcium carbonate with a particle diameter of less than 20 nm. Background technique [0002] Nano-calcium carbonate is an important inorganic filler, which is widely used in silicone structural sealants, plastics, rubber, inks and other fields, and can endow organic polymers with good thixotropic properties and excellent mechanical properties. In order to improve the dispersion performance of nano-calcium carbonate in the matrix resin, it is usually necessary to modify the surface of nano-calcium carbonate. At present, the conventional modification method is to modify the surface of nano-calcium carbonate by fatty acid or its salt. This modification method has a good modification effect on the commercially available nano-calcium carbonate with a particle size between 30nm and 100nm. Effect. However, for...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/02C09C3/06C09C3/08C09C3/10B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C09C1/022C09C3/006C09C3/06C09C3/08C09C3/10
Inventor 杜年军颜干才韦健毅林进超王宗民
Owner 广东德晟新材料科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com