Method for preparing mercaptan-alkene clicking chemistry functional hyperbranched polyethyleneimine

Abstract

The invention belongs to the technical field of chemical industries, in particular to a method for preparing mercaptan-alkene clicking chemistry functional hyperbranched polyethyleneimine. The method prepares a functional hyperbranched polyethyleneimine macromolecule at one step by mercaptan-alkene clicking chemistry reaction, does not use a heavy metal ion as a catalyst and has favorable environmental protection. The method has the advantages of simplicity, convenience, one-step completion, no catalyst addition, low cost, no pollution to environment, wide application prospect, and the like. The prepared mercaptan-alkene clicking chemistry functional hyperbranched polyethyleneimine can selectively adsorb mercury-contained solution with different concentrations, is a new generation mercuryremoving product with high performance and efficiency and can be applied to the processing field of mercury-contained industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of mercaptan-alkene click chemistry functionalized hyperbranched polyethyleneimine. Background technique [0002] Hyperbranched polymer is an important highly branched polymer. Its special structure and properties determine its wide application value in many fields. For example, its unique nano-pores inside the molecule can chelate ions, adsorb small molecules, or serve as catalytic active sites for small molecule reactions; its highly branched structure makes it difficult for hyperbranched polymers to crystallize, without chain entanglement, so the solubility properties Greatly improved; compared with linear molecules of the same molecular mass, the melt viscosity is lower, and the low viscosity and many modifiable end groups make it an important application in coatings, polymer blending and other fields; in addition, hyperbranched Pol...

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Problems solved by technology

[0003] Chinese patent CN101328270 reports a synthetic method of polycaprolactone-block-polyethylene glycol with a non-linear structure, which is composed of polycaprolactone with an alkynylated fan-shaped structure at the end and azidolated linear structure at the end Polyethylene glycol is prepared by one-step click chemical reaction, but cuprous bromide and pentamethyldivinyltriamine are used as co-catalysts in the preparation process, which will inevitably affect the performance of the synthesized product, and the by-product Many, high cost, limited application

Chinese patent CN1671673 and CN101006119 have reported a kind of copper (I) catalyzed triazole dendritic macromolecule click chemistry approach, and the product adopts sufficient sodium hydroxide / citrate aqueous solution to wash the first step product, effectively removes possible binding to Copper in the triazole part of the dendrimer can avoid the impact of trace catalysts on product performance, but a large amount of Cu(I) catalysts are still used in the preparation process

Chinese patent CN101215736 reports another glycosyl-modified acrylonitrile-based nanofiber and its preparation method. This method uses the "click chemistry" method to fix the glycosyl containing azide group to the surface of the nanofiber, effectively improving the nanofiber The immobilization rate of surface sugar groups significantly improves the separation efficiency of proteins, but this technology still belongs to the copper-catalyzed azide-alkyne cycloaddition reaction

At present, there are no public literature reports and patent applications about the preparation method of thiol-ene click chemical functionalized hyperbranched polyethyleneimine at home and abroad.

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