I-Polyethyleneimine (PEI) iyi-polymer enamagatsha amaningi eyakhiwe ngama-monomers e-ethyleneimine.Ngesakhiwo sayo samaketanga amade, i-PEI ikhombisa izakhiwo ezinhle kakhulu zokunamathisela, okuyenza ibe ukukhetha okuhle kwezinhlelo zokusebenza ezahlukahlukene, kufaka phakathi ukumbozwa kwamaphepha, izindwangu, izinto zokunamathisela, nokuguqulwa kwendawo.Ngaphezu kwalokho, imvelo ye-PEI ye-cationic iyivumela ukuthi ibophezele ngempumelelo kuma-substrate ashajwa kabi, ithuthukise ukuguquguquka kwayo ezimbonini ezahlukene.
Ngaphezu kwezakhiwo zayo zokunamathisela, i-PEI iphinde ibonise amandla akhethekile okugcina, azuzisayo ezindaweni eziningi ezifana nokwelashwa kwamanzi angcolile, ukuthwebula kwe-CO2, kanye ne-catalysis.Isisindo sayo samangqamuzana aphezulu sivumela ukukhangisa okuphumelelayo nokukhethayo, okuyenza ibe yingxenye eyigugu ekuhlanzweni kwamagesi noketshezi.