Preparation method of nano spherical polyelectrolyte brush

A polyelectrolyte brush and spherical technology, which is applied in the field of preparation of nano-spherical polyelectrolyte brushes, can solve problems such as incapability of continuous production, and achieve the effects of continuous flow and preparation, simple preparation and simple method.

Active Publication Date: 2021-04-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a nano-spherical polyelectrolyte brush and a preparation method thereof, so as to solve the existing problem that cannot be continuously produced

Method used

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  • Preparation method of nano spherical polyelectrolyte brush
  • Preparation method of nano spherical polyelectrolyte brush
  • Preparation method of nano spherical polyelectrolyte brush

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Get 20g polystyrene core emulsion (measure its solid content and be 3.5wt%, particle diameter is 110 nanometers) add deionized water and dilute to 1.7 * 10 -4 mol / mL, pump nitrogen in a 250mL four-neck flask for 3 to 5 times, and draw out with a 50mL syringe; 0.525g of acrylic acid (75% of the solid content of the polystyrene core emulsion) is diluted to 3.4×10 with deionized water -4 mol / mL, pump nitrogen in a 250mL four-neck flask for 3 to 5 times, draw out with a 50mL syringe, and fix the syringe to the syringe pump; use a microchannel with a size of 0.8mm and a volume of 3.165mL 0.5mm T-shaped tee. The residence time is 1h, the two stocks of materials are fed with a flow rate ratio of 1:1, and the product is collected at the outlet. After dialysis and purification in ultrapure water with a molecular weight cut-off of 14000, the average particle diameter of the nano-spherical polyelectrolyte brush is measured as 180 nm (pH=8).

Embodiment 2

[0030] Get 20g polystyrene core emulsion (measure its solid content and be 3.5wt%, particle diameter is 110 nanometers) add deionized water and be diluted to 1.369 * 10 -4 mol / mL, pump nitrogen in a 250mL four-neck flask for 3 to 5 times, and draw out with a 50mL syringe; 0.49g of acrylic acid (70% of the solid content of the polystyrene core emulsion) is diluted to 1.369×10 with deionized water -4mol / mL, pump nitrogen in a 250mL four-necked flask for 3 to 5 times, draw out with a 50mL syringe, and fix the syringe to the syringe pump; use a microchannel with a size of 1.6mm and a volume of 18.689mL. 0.5mm T-shaped tee. The residence time is 1h, the two stocks of materials are fed with a flow rate ratio of 1:1, and the product is collected at the outlet. After dialysis and purification in ultrapure water with a molecular weight cut-off of 14000, the average particle diameter of the nano-spherical polyelectrolyte brush is measured as 160 nm (pH=8).

Embodiment 3

[0032] Get 20g polystyrene core emulsion (measure its solid content and be 3.5wt%, particle diameter is 110 nanometers) add deionized water and be diluted to 1.369 * 10 -4 mol / mL, pump nitrogen in a 250mL four-neck flask for 3 to 5 times, and draw out with a 50mL syringe; 0.21g of acrylic acid (30% of the solid content of the polystyrene core emulsion) is diluted to 1.369×10 with deionized water -4 mol / mL, pump nitrogen in a 250mL four-necked flask for 3 to 5 times, draw out with a 50mL syringe, and fix the syringe to the syringe pump; use a microchannel with a size of 1.6mm and a volume of 18.689mL. 0.5mm T-shaped tee. The residence time is 0.5h, the two streams of materials are fed with a flow rate ratio of 1:1, and the product is collected at the outlet. After dialysis and purification in ultrapure water with a molecular weight cut-off of 14,000, the average particle size of the nano-spherical polyelectrolyte brush is measured. at 140 nm (pH=8).

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Abstract

The invention provides a preparation method of a nano spherical polyelectrolyte brush, which comprises the following steps: dialyzing polystyrene core emulsion by using ultrapure water to remove impurities, adding the dialyzed and purified polystyrene core emulsion into a flask, pumping nitrogen, pumping out the polystyrene core emulsion by using an injector, diluting the water-soluble polymer monomer, adding the diluted water-soluble polymer monomer into a flask, pumping nitrogen, and pumping out the water-soluble polymer monomer by using an injector; fixing an injector filled with the polystyrene core emulsion and a water-soluble polymer monomer to an injection pump; arranging a channel near the high-voltage ultraviolet lamp, and arranging a cooling device near the channel; and connecting the injector with the channel, turning on the ultraviolet lamp, receiving a product at a connector after the interior of the reactor is stable, and dialyzing and purifying by virtue of a dialysis bag, so as to obtain the nano spherical polyelectrolyte brush. According to the invention, continuous reaction and preparation of the polyelectrolyte brush can be realized, the problems caused by intermittent preparation and amplification effect can be effectively overcome, and the production efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of functional nanomaterials, and relates to a continuous preparation method and application of a nano-spherical polyelectrolyte brush, in particular to the method of efficiently and rapidly preparing a polyelectrolyte-rich nano-spherical polyelectrolyte brush by using a photomicroreactor The new method can be applied to the fields of scale inhibitor of filter membrane, removal of harmful metal ions in water, recovery of noble metal ions, medical diagnosis and the like. Background technique [0002] When the charged polymer chains are densely distributed on the surface of the nano-matrix in the form of one end fixed, due to volume repulsion and electrostatic repulsion, the free ends of the polymer chains will stretch out to form nano-polyelectrolyte brushes. structure. The surface of nano-matrix can significantly improve its interaction with external substances, cohesion and friction by introducing polymer b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F220/06C08F2/48B01J4/00B01J19/00B01J19/12
Inventor 郭旭虹李莉王铭纬赵方田洋郭江涛张子钰孙亮
Owner EAST CHINA UNIV OF SCI & TECH
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