Application of star-shaped/multi-arm block copolymers in preparation of mixture containing nano-particles

A block copolymer and nanoparticle technology, applied in the field of materials science, can solve problems such as limited application scope, limited application, instability, etc.

Active Publication Date: 2015-06-24
SHENZHEN NANKE NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this type of application, the existing polyether surfactants can only keep the low-concentration nanoparticle system dispersed uniformly and stably in a short period of time.
Under the conditions of extended time (usually one week) or high concentration of nanoparticles, the existing polyether surfactants can no longer keep the nanoparticles dispersed uniformly and stably. This inhomogeneity and instability are manifested in non-polar media especially obvious
The non-uniform and unstable nature of the existing polyether surfactants limits its application range, especially its application in coating technology and ink technology
[0006] Therefore, the dispersion technology of nanomaterials still needs to be improved

Method used

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  • Application of star-shaped/multi-arm block copolymers in preparation of mixture containing nano-particles
  • Application of star-shaped/multi-arm block copolymers in preparation of mixture containing nano-particles
  • Application of star-shaped/multi-arm block copolymers in preparation of mixture containing nano-particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] Embodiment 1: the synthesis of isobutylene-propylene glycol-isobutylene three-arm block copolymer

[0147]173.25g (excessive 5%) polyisobutylene succinic anhydride (PIBSA) (molecular weight is 1100g / mol) and 200ml normal hexane are dissolved in the there-necked flask of 500ml, then under nitrogen atmosphere, under continuous stirring condition, the there-necked flask is placed In an oil bath at 60°C, use a 150ml constant pressure dropping funnel to dissolve 22.0g of polyetheramine T-403 (molecular weight: 440g / mol, three-arm polymer, each arm has an amino group at the end of the molecular chain.) Dissolve in 100ml In acetone, when the temperature of the solution in the three-necked flask is stable at 60°C, add the polyetheramine T-403 solution dropwise into the there-necked flask, and stir the resulting solution at 60°C for at least 8 hours until the solution turns yellow. White emulsion, the solvent was removed by vacuum rotary evaporation, and a viscous light yellow l...

Embodiment 2

[0148] Embodiment 2: the synthesis of isobutylene-pentaerythritol propoxylate-isobutylene four-arm block copolymer

[0149] 115.5g (excessive 5%) polyisobutylene succinic anhydride (PIBSA) (molecular weight is 1100g / mol) and 200ml N, N-dimethylformamide are dissolved in the there-necked flask of 500ml, then under nitrogen atmosphere, continuous stirring condition 10.65g of polypentaerythritol propoxylate (molecular weight: 426g / mol, CAS number: 9051-49-4, four-armed polymer, Each arm has a hydroxyl group at the end of the molecular chain.) was dissolved in 80ml N, N-dimethylformamide, and when the temperature of the solution in the there-necked flask was stabilized at 100°C, the polypentaerythritol propoxylate solution was added dropwise Add it into a three-neck flask, and stir the resulting solution at 100°C for at least 24 hours until the solution turns into a yellow-white emulsion. The solvent is removed by vacuum rotary evaporation to obtain a viscous light yellow liquid p...

Embodiment 3

[0150] Embodiment 3: the synthesis of isobutylene-pentaerythritol propoxylate-isobutylene radial block copolymer

[0151] 115.5g (excessive 5%) polyisobutylene succinic anhydride (PIBSA) (molecular weight is 1100g / mol) and 200ml N, N-dimethylformamide are dissolved in the there-necked flask of 500ml, then under nitrogen atmosphere, continuous stirring condition Next, place the three-neck flask in an oil bath at 100°C, and use a 150ml constant pressure dropping funnel to add 7.86g of polypentaerythritol propoxylate (molecular weight: 629g / mol, CAS number: 9051-49-4, star-shaped polymer, Contain eight molecular chain branches, the end of each molecular chain branch has a hydroxyl group.) Dissolve in 80ml N, N-dimethylformamide, when the temperature of the solution in the there-necked flask is stable at 100°C, the polypentaerythritol The propoxylate solution was added dropwise into a three-necked flask, and the resulting solution was stirred at 100°C for at least 24 hours until t...

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Abstract

The invention provides a mixture containing nano-particles, which is prepared by using star-shaped block copolymers and multi-arm block copolymers, and meanwhile, the invention provides a method for preparing the mixture containing the block copolymers and the nano-particles and application of the method. By using the star-shaped block copolymers and multi-arm block copolymers provided by the invention, the nano-particles can be effectively dispersed into an organic medium, and a formed dispersion system is high in stability, and can be stored for a long time without sedimentation.

Description

technical field [0001] The invention relates to the field of material science, in particular to the use of a star / multi-arm block copolymer in preparing a mixture containing nanoparticles. Background technique [0002] Nanomaterials are widely used in products such as lubricating oil, grease, conductive paste, ink, printing glue, photoresist, paint, coating and adhesive. Improving the dispersion of nanomaterials in these media is expected to significantly improve the tribological properties of lubricating oil additives, the leveling of coatings, and the conductivity of conductive pastes in conductive devices. [0003] Nanoparticles have small particle size, high surface energy, and easy agglomeration between particles. The dispersion and stability of nanomaterials in organic media has become one of the main technical problems that limit their wide application. Surfactants are often used in practical applications to improve the dispersion uniformity and stability of nanopart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/52C08G81/02C09K23/52
CPCC08G81/02
Inventor 孙大陟雍怀松
Owner SHENZHEN NANKE NEW MATERIALS TECH CO LTD
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