ʻO ka Polyethyleneimine (PEI) he polymer lālā nui i haku ʻia me nā monomers ethyleneimine.Me kona ʻano kaulahao lōʻihi, hōʻike ʻo PEI i nā waiwai adhesive maikaʻi loa, e lilo ia i koho kūpono no nā noi like ʻole, me ka uhi pepa, textiles, adhesives, a me ka hoʻololi ʻana i ka ʻili.Eia kekahi, ʻo ke ʻano cationic o PEI e hiki ai iā ia ke hoʻopaʻa pono i nā substrate i hoʻopiʻi ʻia, hoʻonui i kona versatility i nā ʻoihana like ʻole.
Ma waho aʻe o kāna mau waiwai adhesive, hōʻike pū ʻia ʻo PEI i nā mana buffering ʻokoʻa, he mea pono i nā wahi he nui e like me ka mālama ʻana i ka wai ʻino, hopu CO2, a me ka catalysis.ʻO kona kaumaha molecular kiʻekiʻe e hiki ai i ka adsorption maikaʻi a koho, e lilo ia i mea waiwai i ka hoʻomaʻemaʻe ʻana i nā kinoea a me nā wai.