Zakudya zotayidwa kuchokera ku zinyalala zamatabwa ndi zipolopolo za nkhanu

Ma cellulose ndi chitin, ma biopolymers awiri omwe amapezeka kwambiri padziko lapansi, amapezeka mu zipolopolo za zomera ndi crustacean (pakati pa malo ena), motsatana.Asayansi ku Georgia Institute of Technology tsopano akonza njira yophatikizira ziwirizi kuti apange compostable chakudya choyikapo ngati matumba apulasitiki.

Motsogozedwa ndi Prof. J. Carson Meredith, gulu lofufuza likugwira ntchito poyimitsa ma cellulose nanocrystals otengedwa mumitengo ndi chitin nanofibers otengedwa mu zipolopolo za nkhanu m'madzi, kenako kupopera mankhwala pa bioavailable mu zigawo alternating.Nkhaniyi imapangidwa pagawo laling'ono la polima lomwe linagwiritsidwanso ntchito - kuphatikiza kwabwino kwa cellulose nanocrystals woyipitsidwa bwino komanso ma nanofiber a chitin.

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Kamodzi zouma ndi peeled kuchokera gawo lapansi, chifukwa mandala filimu ali mkulu kusinthasintha, mphamvu ndi compostability.Kuphatikiza apo, imathanso kupitilira kukulunga pulasitiki yachikhalidwe yosapangidwa kuti isawononge chakudya."Chizindikiro chathu chachikulu chomwe chimafaniziridwa ndi nkhaniyi ndi PET kapena polyethylene terephthalate, yomwe ndi imodzi mwazinthu zomwe zimagwiritsidwa ntchito ndi mafuta omwe mumawawona polemba bwino pamakina ogulitsa ndi zina zotero," adatero Meredith."Zinthu zathu zikuwonetsa kuchepa kwa oxygen ndi 67 peresenti poyerekeza ndi mitundu ina ya PET, kutanthauza kuti imatha kusunga chakudya nthawi yayitali."

Kutsika kwa permeability ndi chifukwa cha kukhalapo kwa nanocrystals."Zimakhala zovuta kuti molekyulu ya mpweya ilowe mu kristalo wolimba chifukwa iyenera kusokoneza kristalo," adatero Meredith."Kumbali ina, zinthu monga PET zimakhala ndi zinthu zambiri za amorphous kapena zopanda crystalline, kotero pali njira zambiri zopezera mamolekyu ang'onoang'ono a gasi kuti apeze mosavuta."

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Pamapeto pake, mafilimu opangidwa ndi biopolymer sakanangosintha mafilimu apulasitiki omwe pakali pano sakuwonongeka akatayidwa, komanso amagwiritsa ntchito zinyalala zamatabwa zomwe zimapangidwa m'mafakitale ndi zipolopolo za nkhanu zomwe zimatayidwa ndi malonda am'nyanja.Mpaka nthawiyo, komabe, mtengo wopangira zinthuzo pamlingo wamakampani uyenera kuchepetsedwa.


Nthawi yotumiza: Aug-29-2022