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A kind of preparation method of nanometer 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 non-continuous production, and achieve the effects of continuous flow and preparation, simple method and simple preparation.

Active Publication Date: 2022-07-15
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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  • A kind of preparation method of nanometer spherical polyelectrolyte brush
  • A kind of preparation method of nanometer spherical polyelectrolyte brush
  • A kind of preparation method of nanometer spherical polyelectrolyte brush

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 20g of polystyrene core emulsion (the solid content is 3.5wt% and the particle size is 110nm) and deionized water is added to dilute to 1.7×10 -4 mol / mL, fill the 250mL four-necked flask with nitrogen 3 to 5 times, and draw out the 50mL syringe; 0.525g acrylic acid (75% of the solid content of the polystyrene core emulsion) is diluted with deionized water to 3.4×10 -4 mol / mL, fill the 250mL four-necked flask with nitrogen 3 to 5 times, draw out the 50mL syringe, and fix the syringe on the syringe pump; use a photomicroreactor with a microchannel size of 0.8mm and a volume of 3.165mL. 0.5mm T-shaped tee. The residence time is 1h, the two strands of materials are fed with a flow rate ratio of 1:1, and the products are collected at the outlet. After dialysis and purification in ultrapure water using a dialysis bag with a molecular weight cut-off of 14,000, the average particle size of the nano-spherical polyelectrolyte brush is measured as 180 nm (pH=8).

Embodiment 2

[0030] Take 20g of polystyrene core emulsion (the solid content is 3.5wt% and the particle size is 110nm) and deionized water is added to dilute to 1.369×10 -4 mol / mL, fill the 250mL four-necked flask with nitrogen for 3 to 5 times, and draw out the 50mL syringe; 0.49g of acrylic acid (70% of the solid content of the polystyrene core emulsion) is diluted with deionized water to 1.369×10 -4mol / mL, fill the 250mL four-necked flask with nitrogen for 3 to 5 times, draw out the 50mL syringe, and fix the syringe to the syringe pump; use a photomicroreactor with a microchannel size of 1.6mm and a volume of 18.689mL, and the inner hole of which is used for material mixing. 0.5mm T-shaped tee. The residence time is 1h, the two strands of materials are fed with a flow rate ratio of 1:1, and the products are collected at the outlet. After dialysis and purification in ultrapure water using a dialysis bag with a molecular weight cut-off of 14,000, the average particle size of the nano-sphe...

Embodiment 3

[0032] Take 20g of polystyrene core emulsion (the solid content is 3.5wt% and the particle size is 110nm) and deionized water is added to dilute to 1.369×10 -4 mol / mL, fill the 250mL four-necked flask with nitrogen for 3 to 5 times, and draw out the 50mL syringe; 0.21g of acrylic acid (30% of the solid content of the polystyrene core emulsion) is diluted with deionized water to 1.369×10 -4 mol / mL, fill the 250mL four-necked flask with nitrogen for 3 to 5 times, draw out the 50mL syringe, and fix the syringe to the syringe pump; use a photomicroreactor with a microchannel size of 1.6mm and a volume of 18.689mL, and the inner hole of which is used for material mixing. 0.5mm T-shaped tee. The residence time is 0.5h, the two materials are fed with a flow ratio of 1:1, and the products are collected at the outlet. After dialysis and purification in ultrapure water using a dialysis bag with a molecular weight cut-off of 14,000, the average particle size of the nano-spherical polyele...

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Abstract

The invention provides a method for preparing a nano-spherical polyelectrolyte brush, which comprises the following steps: dialyzing a polystyrene core emulsion with ultrapure water to remove impurities, adding the dialysis-purified polystyrene core emulsion into a flask to pump nitrogen, and using The polystyrene core emulsion is drawn out by a syringe, the water-soluble polymer monomer is diluted and then added to the flask to be filled with nitrogen, and the water-soluble polymer monomer is drawn out with a syringe; The syringe of the reactor is fixed on the syringe pump; a channel is set near the high-pressure ultraviolet lamp, and a cooling device is set at the accessories of the channel; the syringe is connected to the channel, and the ultraviolet lamp is turned on. Nano-spherical polyelectrolyte brushes were purified by dialysis. The invention can realize the continuous reaction and preparation of the polyelectrolyte brush, can effectively overcome the problems caused by the batch preparation and the amplification effect, and greatly improve the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of functional nano-materials, and relates to a continuous preparation method of nano-spherical polyelectrolyte brushes and applications thereof, in particular to a method for efficiently and rapidly preparing nano-spherical polyelectrolyte brushes rich in polyelectrolytes 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 precious metal ions, and medical diagnosis. Background technique [0002] When the charged polymer chains are densely distributed on the surface of the nanomatrix in the form of one end fixed, the free ends of the polymer chains will stretch out due to volume repulsion and electrostatic repulsion, forming nano-polyelectrolyte brushes called nano-polyelectrolyte brushes. structure. The introduction of polymer brushes on the surface of nanomatrix can significantly improve its int...

Claims

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Application Information

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Patent Type & Authority Patents(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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