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Ionic ball polyelectrolyte brush employing micro-nano carbon sphere as kernel and preparation method thereof

The technology of polyelectrolyte brush and ionic polymer is applied in the field of ionic spherical polyelectrolyte brush and its preparation, which can solve the problems such as no existing, and achieve the effects of low cost, simple preparation process and novel structure

Inactive Publication Date: 2014-04-09
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon materials are mostly used as a shell structure in the synthesis of polyelectrolytes, and there are no reports about using them as spherical cores and grafting polyelectrolyte brushes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Dissolve 2.8g of 4,4'-azobis(4-cyanovaleric acid) (ACVA) in 30mL of anhydrous dichloromethane, in ice-water bath, N 2 Stir under protection until dissolved. Dissolve 8.4g of phosphorus pentachloride in 30mL of anhydrous dichloromethane and place it in a constant pressure funnel, drop it into the above-mentioned ACVA in dichloromethane solution, continue in ice-water bath, N 2 Reaction under protection for 24h hours. The obtained golden yellow solution was treated by suction filtration, rotary evaporation, n-hexane extraction, etc. to obtain white powder 4,4'-azobis(4-cyanovaleryl chloride) (ACVC), which was dissolved in 20mL toluene , prepared into a toluene solution of ACVC with a concentration of 0.1mol / L;

[0032] 2) Mix 0.2g micro-nano carbon spheres with a particle size of 100nm and 3mL triethylamine evenly, and 2 Under the condition of protection and 18°C, the toluene solution of ACVC prepared in step 1) was added dropwise, and stirred for 12 hours. ...

Embodiment 2

[0035] 1) Dissolve 2.8g of 4,4'-azobis(4-cyanovaleric acid) (ACVA) in 40mL of anhydrous dichloromethane, in ice-water bath, N 2 Stir under protection until dissolved. Dissolve 12.5g of phosphorus pentachloride in 40mL of anhydrous dichloromethane and place it in a constant pressure funnel, drop it into the above-mentioned ACVA in dichloromethane solution, continue to cool in an ice-water bath, N 2 Stir under protection for 48 hours. The obtained golden yellow solution was treated by suction filtration, rotary evaporation, n-hexane extraction, etc., to obtain 4,4'-azobis(4-cyanovaleryl chloride) (ACVC) in the form of white powder, which was dissolved in 20mL di In toluene, be prepared into the xylene solution of the ACVC that concentration is 0.7mol / L;

[0036] 2) Mix 0.4g micro-nano carbon spheres with a particle size of 400nm and 3mL triethylamine evenly, and 2 Under the condition of protection and 20°C, the xylene solution of ACVC prepared in step 1) was added dro...

Embodiment 3

[0039] 1) Dissolve 2.8g of 4,4'-azobis(4-cyanovaleric acid) (ACVA) in 50mL of anhydrous dichloromethane, in ice-water bath, N 2 Stir under protection until dissolved. Dissolve 16.7g of phosphorus pentachloride in 50mL of anhydrous dichloromethane and place it in a constant pressure funnel, drop it into the above-mentioned ACVA in dichloromethane solution, continue in ice-water bath, N 2React under protection for 72 hours. After the obtained golden yellow solution was treated with suction filtration, rotary evaporation, and n-hexane extraction, the white powder 4,4'-azobis(4-cyanovaleryl chloride) (ACVC) was obtained, which was dissolved in 20 mL of acetonitrile Solution, prepared into concentration is the ACVC acetonitrile solution of 0.4mol / L;

[0040] 2) Mix 0.4g micro-nano carbon spheres with a particle size of 250nm and 3mL triethylamine evenly, and 2 Under the condition of protection and 24°C, the acetonitrile solution of ACVC prepared in step 1) was added drop...

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Abstract

The invention discloses an ionic ball polyelectrolyte brush employing a micro-nano carbon sphere as a kernel and a preparation method thereof, and belongs to the field of a nano composite material. The kernel of the ionic ball polyelectrolyte brush is the micro-nano carbon sphere, and an outer brush is an ionic monomer. The preparation method comprises the following steps: loading synthetic azo acyl chloride on the surface of the micro-nano carbon sphere, and synthesizing the ionic ball polyelectrolyte brush employing the micro-nano carbon sphere as the kernel by free radical polymerization. The preparation method disclosed by the invention is simple and feasible. The product prepared by the method takes the micro-nano carbon sphere as the kernel, and is novel in structure, green and environment-friendly, low in cost, and different molecular weights and different grafting densities of ionic ball polyelectrolyte brushes can be prepared by controlling the reaction time and the density of the monomer. The product can be used as a conductive polymer dopant, a morphology control agent, a deflocculating agent, a papermaking wet-end additive and the like.

Description

[0001] technical field [0002] The invention relates to an ionic spherical polyelectrolyte brush whose core is micro-nano carbon spheres and a preparation method thereof, belonging to the field of nanocomposite materials. Background technique [0003] Spherical polyelectrolyte brush (SPB) is a kind of one end of the polymer chain containing charged groups fixed on the surface of the spherical substrate, and under the action of Coulomb force, the polymer chain stretches outward on the surface of the substrate and reaches a certain degree of contact. A special homopolymer or copolymer polymer system with branch density. With their special structures and properties, spherical polyelectrolyte brushes have great application potential in drug delivery, lubrication, electrode surface modification, catalysis, and papermaking. [0004] At present, the spherical polyelectrolyte brushes that have made some research progress are mainly based on polystyrene (PS), nano-titanium dioxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00
Inventor 黎厚斌张琪刘亮亮黄瑜王亚莉刘兴海
Owner WUHAN UNIV
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