Compostable zaub mov ntim los ntawm cov khib nyiab ntoo thiab crab plhaub

Cellulose thiab chitin, ob qho tib si biopolymers nyob rau hauv lub ntiaj teb no, muaj nyob rau hauv cov nroj tsuag thiab crustacean plhaub (ntawm lwm qhov chaw), feem.Cov kws tshawb fawb ntawm Georgia lub koom haum thev naus laus zis tam sim no tau tsim ib txoj hauv kev los muab ob qho tib si los tsim cov khoom ntim khoom noj uas muaj compostable zoo ib yam li cov hnab yas.

Thawj coj los ntawm Prof. J. Carson Meredith, pab pawg tshawb fawb tau ua haujlwm los ntawm kev ncua cov cellulose nanocrystals muab rho tawm los ntawm cov ntoo thiab chitin nanofibers muab rho tawm los ntawm crab shells hauv dej, thiab tom qab ntawd txau cov tshuaj mus rau bioavailable nyob rau hauv alternating txheej.Cov khoom siv no yog tsim los ntawm cov khoom siv polymer rov qab siv dua - kev sib xyaw ua ke zoo ntawm cov cellulose nanocrystals tsis zoo thiab cov txiaj ntsig zoo chitin nanofibers.

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Thaum qhuav thiab tev tawm ntawm lub substrate, lub resulting pob tshab zaj duab xis muaj siab yooj, lub zog thiab compostability.Dab tsi ntxiv, nws tuaj yeem ua tau zoo dua qub uas tsis yog-compostable yas qhwv ntawm khaws cov khoom noj los ntawm kev lwj.Meredith tau hais tias "Peb qhov kev ntsuas tseem ceeb ntawm cov khoom siv no piv yog PET lossis polyethylene terephthalate, uas yog ib qho ntawm cov khoom siv roj av ntau tshaj plaws uas koj pom hauv ntim meej hauv cov vending machines thiab lwm yam," Meredith tau hais."Peb cov ntaub ntawv qhia tau hais tias qhov txo qis ntawm 67 feem pua ​​​​ntawm oxygen permeability piv rau qee hom PET, txhais tau tias nws tuaj yeem ua raws li kev xav khaws zaub mov ntev dua."

Qhov txo qis hauv permeability yog vim muaj cov nanocrystals.Meredith tau hais tias "Nws nyuaj rau cov roj molecule nkag mus rau cov khoom siv lead ua vim nws yuav tsum cuam tshuam cov qauv siv lead ua," Meredith tau hais."Ntawm qhov tod tes, tej yam zoo li PET muaj ntau cov ntsiab lus amorphous lossis tsis-crystalline, yog li muaj ntau txoj hauv kev rau cov roj me me kom pom tau yooj yim dua."

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Thaum kawg, cov yeeb yaj kiab biopolymer tuaj yeem tsis tsuas yog hloov cov yeeb yaj kiab yas uas tam sim no tsis biodegrade thaum muab pov tseg, tab sis kuj tseem siv cov khib nyiab ntoo tsim hauv cov chaw tsim khoom thiab cov plhaub plhaub pov tseg los ntawm kev lag luam nqaij nruab deg.Txog thaum ntawd, txawm li cas los xij, tus nqi ntawm kev tsim cov khoom ntawm kev lag luam nplai yuav tsum raug txo.


Post lub sij hawm: Aug-29-2022