Bioplastics zvinhu zvepurasitiki zvakagadzirwa kubva kubiomass pachinzvimbo chemafuta asina kukora uye gasi rechisikigo.Ivo vane hushamwari hwezvakatipoteredza asi vanowanzove vasina kusimba uye vanochinjika pane echinyakare mapurasitiki.Izvo zvakare hazvina kugadzikana zvakanyanya kana zvichiratidzwa nekupisa.
Sezvineiwo, masayendisiti paYunivhesiti yeAkron (UA) vakawana mhinduro kune iyi yekupedzisira kukanganisa kuburikidza nekupfuura kugona kwebioplastics.Kubudirira kwavo kunogona kuita mupiro wakakura mukuchengetedza mapurasitiki mune ramangwana.
Shi-Qing Wang, PhD lab kuUA, ari kugadzira nzira dzakasimba dzekushandura brittle polymers kuita zvinhu zvakaomarara uye zvinochinjika.Kuvandudzwa kwechikwata kuchangoburwa ndeye polylactic acid (PLA) yemukombe prototype ine-yakasimba-yakasimba, yakajeka, uye isingaderedze kana kuremara kana yazadzwa nemvura iri kufashaira.
Purasitiki yave chikamu chakakosha chehupenyu hwedu hwezuva nezuva, asi mazhinji acho haagone kudzokororwa uye saka anounganidza mumarara.Mamwe anovimbisa biodegradable/compostable alternatives sePLA kazhinji haana kusimba zvakaringana kutsiva echinyakare fossil based polymers se polyethylene terephthalate (PET) nekuti izvi zvigadziriso zvinonetsa.
PLA imhando yakakurumbira yebioplastic inoshandiswa mukurongedza uye midziyo nekuti yakachipa kugadzira.Lab yaWang isati yaita izvi, kushandiswa kwePLA kwaive kushoma nekuti yaisakwanisa kumira tembiricha yakakwira.Ndosaka tsvakiridzo iyi ingave budiriro yemusika wePLA.
Dr. Ramani Narayan, ane mukurumbira bioplastic musayendisiti uye purofesa emeritus paMichigan State University, akati:
PLA ndiyo inotungamira pasi rose 100% biodegradable uye yakazara compostable polymer.Asi ine simba rekuita rakaderera uye tembiricha yekushatisa yakaderera.Inopfava uye inoputsika muchimiro paanenge 140 madhigirii F, ichiita kuti isakodzere marudzi mazhinji ezvikafu zvinopisa zvekurongedza uye midziyo inoraswa.Tsvagiridzo yaDr. Wang inogona kunge iri tekinoroji yekubudirira nekuti mukombe wake wePLA wakasimba, wakajeka, uye unogona kubata mvura inopisa.
Chikwata chakafunga zvakare chimiro chakaomarara chePLA plastiki padanho remamorekuru kuti iwane kupisa kwekupisa uye ductility.Ichi chinhu chinoumbwa nemamorekuru emaketani akasungwa pamwechete sespaghetti, akabatana.Kuti ive yakasimba thermoplastic, vaongorori vaifanira kuve nechokwadi chekuti crystallization haina kukanganisa chimiro chekuruka.Anodudzira izvi semukana wekutora ma noodles kamwechete nepeya yezvimiti, pane mashoma mashoma anotsvedza kubva kune mamwe.
Yavo PLA yepurasitiki mukombe prototype inogona kubata mvura isina kuora, kuderera kana kuita opaque.Aya makapu anogona kushandiswa seimwe nzira yakasarudzika yekofi kana tii.
Nguva yekutumira: Feb-08-2023