I-Bioplastics zizinto zeplastiki ezenziwe nge-biomass endaweni ye-oyile ekrwada kunye negesi yendalo.Zinobuhlobo ngakumbi kokusingqongileyo kodwa zithande ukuba zingahlali ixesha elide kwaye zibhetyebhetye kuneeplastiki zemveli.Zikwangazinzanga xa zibekwe kubushushu.
Ngethamsanqa, izazinzulu kwiYunivesithi yaseAkron (UA) zifumene isisombululo kule ntsilelo yokugqibela ngokuhamba ngaphaya kwamandla e-bioplastics.Uphuhliso lwabo lunokuba negalelo elikhulu ekuzinzeni kweeplastiki kwixesha elizayo.
U-Shi-Qing Wang, i-PhD lab e-UA, iphuhlisa izicwangciso ezisebenzayo zokuguqula iipolymers ezinqabileyo zibe yizinto eziqinileyo neziguquguqukayo.Uphuhliso lwamva nje lweqela luyi-polylactic acid (PLA) yekomityi yeprototype eyomeleleyo kakhulu, ecacileyo, kwaye ayiyi kushwabana okanye ikhubazeke xa izaliswe ngamanzi abilayo.
Iplastiki ibe yinxalenye yobomi bethu bemihla ngemihla, kodwa uninzi lwayo alunakusetyenziswa kwakhona kwaye ngenxa yoko iqokelelana kwiindawo zokulahla inkunkuma.Ezinye iindlela ezithembisayo ezinokubolisa/ezinokugqugquzelwa njenge-PLA zisoloko zingomelelanga ngokwaneleyo ukuba zithathe indawo ye-polymers yefosili esekelwe ngokwesithethe njenge-polyethylene terephthalate (PET) kuba ezi mathiriyeli zizinzileyo zikruneke kakhulu.
I-PLA luhlobo oludumileyo lwe-bioplastic esetyenziselwa ukupakishwa kunye nezixhobo kuba kubiza ixabiso eliphantsi ukuvelisa.Ngaphambi kokuba ilebhu kaWang yenze oku, ukusetyenziswa kwe-PLA kwakulinganiselwe ngenxa yokuba yayingakwazi ukumelana nokushisa okuphezulu.Yiyo loo nto olu phando lunokuba yimpumelelo kwimarike ye-PLA.
UGqr Ramani Narayan, isazinzulu se-bioplastics esaziwayo kunye noprofesa ophumayo kwiYunivesithi yaseMichigan State, wathi:
I-PLA yeyona nto iphambili kwihlabathi nge-100% enokubola kwaye ipholima evundisiweyo ngokupheleleyo.Kodwa inamandla empembelelo ephantsi kunye nobushushu obuphantsi bokuphazamisa ubushushu.Iyathamba kwaye iphule ngokwesakhiwo malunga ne-140 degrees F, iyenza ingafaneleki kwiindidi ezininzi zokupakishwa kokutya okushushu kunye nezikhongozeli ezilahlwayo.Uphando lukaGqr. Wang lunokuba yitekhnoloji yokuphumelela kuba iprototype yakhe yePLA ikomityi yomelele, iyabonakala, kwaye inokubamba amanzi abilayo.
Iqela liphinde lacinga ngesakhiwo esiyinkimbinkimbi seplastiki ye-PLA kwinqanaba le-molecular ukuphumeza ukuxhathisa ukushisa kunye ne-ductility.Esi sixhobo senziwe ngeemolekyuli zamatsheyini ezidityaniswe kunye njenge-spaghetti, ezidityanisiweyo enye kwenye.Ukuze ube yi-thermoplastic eyomeleleyo, abaphandi kwakufuneka baqinisekise ukuba i-crystallization ayizange iphazamise isakhiwo se-weave.Utolika oku njengethuba lokuchola zonke ii-noodles ngaxeshanye ngepere yezinti, endaweni yee-noodle ezimbalwa ezityibilikayo kwezinye.
Iprototype yabo yekomityi yeplastiki ye-PLA inokubamba amanzi ngaphandle kokubola, ukucutheka okanye ukuba yi-opaque.Ezi komityi zinokusetyenziswa njengenye indlela yokusingqongileyo ehambelana nekofu okanye iti.
Ixesha lokuposa: Feb-08-2023