ICellulose kunye ne-chitin, ezona biopolymers zixhaphakileyo ehlabathini, zifumaneka kumaqokobhe esityalo kunye neecrustacean (phakathi kwezinye iindawo), ngokulandelelanayo.Izazinzulu zaseGeorgia Institute of Technology ngoku ziye zaqulunqa indlela yokudibanisa ezi zimbini ukuvelisa ukupakishwa kokutya okuvundisiweyo okufana neengxowa zeplastiki.
Ekhokelwa nguProf J. Carson Meredith, iqela lophando lisebenza ngokumisa i-cellulose nanocrystals ekhutshwe kwimithi kunye ne-chitin nanofibers ekhutshwe kwi-crab shells emanzini, kwaye emva koko itshiza isisombululo kwi-bioavailable kwi-alternating layers.Esi sixhobo siveliswa kwi-substrate ye-polymer esetyenzisiweyo - inhlanganisela efanelekileyo ye-cellulose nanocrystals ehlawuliswa kakubi kunye ne-chitin nanofibers.
Emva kokuba isomisiwe kwaye ihlanjululwe kwi-substrate, ifilimu ecacileyo ephumela kuyo inokuguquguquka okuphezulu, amandla kunye nokuvuthwa.Ngaphezu koko, inokuphinda iphumelele isisongelo seplastiki esingavundisiyo ukugcina ukutya kungonakali."I-benchmark yethu ephambili apho le nto ithelekiswa nayo i-PET okanye i-polyethylene terephthalate, enye yezona zinto zixhaphakileyo ezisekelwe kwi-petroleum ozibonayo ngokupakishwa okucacileyo kumatshini wokuthengisa kunye nokunye," kusho uMeredith."Izinto zethu zibonisa ukuncipha kweoksijini ngeepesenti ezingama-67 xa kuthelekiswa nezinye iintlobo zePET, oko kuthetha ukuba inokugcina ukutya ixesha elide."
Ukuncipha kwe-permeability kubangelwa ubukho be-nanocrystals."Kunzima ukuba i-molecule yegesi ingene kwi-crystal eqinile kuba kufuneka iphazamise isakhiwo se-crystal," kusho uMeredith."Ngakolunye uhlangothi, izinto ezifana ne-PET zinezinto ezininzi ze-amorphous okanye ezingekho i-crystalline, ngoko kukho iindlela ezininzi ze-molecule zegesi ezincinci ukuze zifumaneke lula."
Ekugqibeleni, iifilimu ezisekelwe kwi-biopolymer azikwazi nje ukuthatha iifilimu zeplastiki okwangoku zingatshintshi i-biodegrade xa zilahlwa, kodwa zisebenzisa inkunkuma yomthi eveliswa kwiifektri kunye namaqokobhe oononkala alahlwe kushishino lokutya kwaselwandle.Kude kube ngoko, nangona kunjalo, iindleko zokuvelisa izinto kwi-industrial scale kufuneka zincitshiswe.
Ixesha lokuposa: Aug-29-2022