Polyethyleneimine

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polyethylene Polyethyleneimine, PEI ）It is also called polyazaocyclic propane, which is a kind of Water soluble polymer Polymer. Colorless or yellowish viscous liquid, with Hygroscopicity , soluble in water ethanol , insoluble in benzene. Commercially available products are usually 20%~50% aqueous solutions.

Chinese name: Polyethyleneimine^[3]
Foreign name: Polyethyleneimine ethoxylated
Alias: Poly (aza heterocyclic propane)

CAS login number: 9002-98-6^[1]
Boiling point: 250 ℃^[3]
Water solubility: dissolve in water
Density: 1.08 g/cm³

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Composition

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Structure of linear polyethyleneimine

English name: poly (ethylene imine), referred to as PEI^[2]

CAS No : 9002-98-6 (polyethylene branched viscous liquid)

Commercially available products are usually 20%~50% aqueous solutions. paper industry Chinese Degree of polymerization At about 100, its aqueous solution is positive, and the pH value of 5% aqueous solution is 8~11. It will gel in the presence of acid. Polyethyleneimine has high reactivity, which can react with hydroxyl groups in cellulose and crosslink and polymerize to produce paper Wet strength , with dry Enhancement 。 whatever acid , alkali and aluminum sulfate The wet strength and retention rate will be affected by the presence of. Mainly used for Sizing Of Absorbent paper (such as filter paper, ink absorbent paper, toilet paper, etc.) Paper damage It is difficult to handle. In addition, it can speed up the filtration of paper pulp and make white water Microfiber It is easy to flocculate. yes Acid dye Strong Binding force , can be used as acid dyes for paper dyeing Fixing agent 。 Can also be used to process cellophane To reduce the wetting deformation of the paper. Polyethyleneimine can also be used for fiber modification Printing and dyeing auxiliaries 、 ion exchange resin And agglomeration and sedimentation (metal capture waste water treatment ）Etc.

Main purpose

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Under certain conditions, polyethyleneimine solid materials can absorb a large amount of carbon dioxide ， separation process It's also very convenient. Carbon dioxide can be permanently sealed in polyethyleneimine solid materials, and can also be extracted for other fields. The material can be reused, and remains ultra-high absorption efficiency as always. Polyethyleneimine also has strong adhesion ability, which can effectively make cells adhere, but polyethyleneimine also has strong toxicity.