Cellulose uye chitin, iwo maviri anonyanya kufarirwa biopolymers munyika, anowanikwa muzvirimwa nemacrustacean shells (pakati pedzimwe nzvimbo), zvichiteerana.Masayendisiti kuGeorgia Institute of Technology parizvino akagadzira nzira yekubatanidza zviviri izvi kugadzira compostable food package yakafanana nemabhegi epurasitiki.
Ichitungamirwa naProfessor J. Carson Meredith, boka retsvakurudzo riri kushanda nekumisa cellulose nanocrystals yakatorwa kubva muhuni uye chitin nanofibers yakatorwa kubva mumakanda egakanje mumvura, uye nekumwaya mhinduro pane bioavailable mune alternating layers.Nyaya iyi inogadzirwa pane yakashandiswazve polymer substrate - musanganiswa wakanaka we-negatively charged cellulose nanocrystals uye yakanaka chaji chitin nanofibers.
Kamwe yakaomeswa uye yakasvunurwa kubva kune substrate, iyo inoguma yakajeka firimu ine yakakwirira kuchinjika, simba uye compostability.Zvakare, inogonawo kudarika yechinyakare isiri-compostable purasitiki kuputira pakuchengetedza chikafu kuti chisakara."Chiratidzo chedu chikuru chinofananidzwa nechinyorwa ichi PET kana polyethylene terephthalate, inova imwe yemafuta epetroleum-yakavakirwa zvinhu zvaunoona mukurongedza kwakajeka mumashini ekutengesa nezvimwe," akadaro Meredith."Zvinhu zvedu zvinoratidza kudzikiswa kwe67 muzana mukupenya kweokisijeni zvichienzaniswa nedzimwe mhando dzePET, zvichireva kuti inogona kuchengetedza chikafu kwenguva refu."
Kudzikira kwepermeability kunokonzerwa nekuvapo kwenanocrystals."Zvakaoma kuti molecule yegesi ipinde mukati mekristini yakasimba nokuti inofanira kukanganisa chimiro chekristal," akadaro Meredith."Kune rimwe divi, zvinhu zvakaita sePET zvine zvakawanda zveamorphous kana zvisiri-crystalline, saka kune nzira dzakawanda dzekuti mamorekuru egasi awane nyore."
Pakupedzisira, mafirimu e-biopolymer-based haaigona kungotsiva mafirimu epurasitiki ayo pari zvino asingashanduki kana akaraswa, asiwo anoshandisa tsvina yehuni inogadzirwa mumafekitari uye makakanje akaraswa neindasitiri yezvokudya zvegungwa.Kusvika panguva iyoyo, zvisinei, mutengo wekugadzira zvinhu pachiyero cheindasitiri unofanirwa kudzikiswa.
Nguva yekutumira: Aug-29-2022