Iingxowa zokupakisha ezonakeleyo, oku kuthetha ukuthotywa, kodwa iingxowa zokupakisha ezonakeleyo zohlulwe zibe “zinokonakala” kwaye “zinokonakala ngokupheleleyo” zimbini. Ingxowa yokupakisha eyonakaliswayo ibhekiselele kwinkqubo yokuvelisa ukongeza inani elithile lezongezo (ezifana nesitatshi, isitashi esilungisiweyo okanye enye i-cellulose, i-photosensitizer, i-agent ye-biodegradative, njl. ukuthotywa kwimeko yendalo. Ingxowa yokupakisha eyonakaliswa ngokupheleleyo ibhekiselele kwingxowa yokupakisha yeplastiki ithotywe ngokupheleleyo ibe ngamanzi kunye nekharbon diokside. Umthombo oyintloko wale nto ichithwa ngokupheleleyo icutshungulwa ibe yi-lactic acid, eyi-PLA, ukusuka kumbona kunye ne-cassava.
I-Polylactic acid (PLA) luhlobo olutsha lwe-biological substrate kunye ne-biodegradable material ehlaziyiweyo. I-glucose ifumaneka kwi-starch ekrwada ngezinto ze-saccharification, kwaye i-lactic acid enobunyulu obuphezulu ivundisiwe kwi-glucose kunye neentlobo ezithile, kwaye emva koko i-polylactic acid enobunzima obuthile bemolekyuli idityaniswe yi-chemical synthesis. Ine-biodegradability elungileyo, kwaye inokuthotywa ngokupheleleyo yi-microorganisms kwindalo phantsi kweemeko ezithile emva kokusetyenziswa, kwaye ekugqibeleni ivelise i-carbon dioxide namanzi. Ayingcolisi imo engqongileyo, nto leyo eluncedo kakhulu ekukhuselweni kwendalo, kwaye iyinto ehambelana nokusingqongileyo kubasebenzi.
Okwangoku, izinto eziphambili ze-bio-based ezisekelwe kwi-packaging bags ngokupheleleyo zenziwe nge-PLA + PBAT, enokuthi ihlanjululwe ngokupheleleyo emanzini kunye ne-carbon dioxide kwiinyanga ezi-3-6 phantsi kwemeko yokudibanisa (i-60-70 degrees), ngaphandle kokungcola. kokusingqongileyo. Kutheni ukongeza i-PBAT, umenzi ochwephesha wokupakisha oguquguqukayo, phantsi kokuchazwa kwe-PBAT adipic acid, 1, 4 - butanediol, terephthalic acid copolymer, kakhulu yi-biodegradable synthetic aliphatic kunye neepolymers ezinuka kamnandi, i-PBAT inokuguquguquka okuhle kakhulu, inokwenza ifilimu , ukuvuthela ngaphandle kokulungiswa, ukugquma kunye nokunye ukusetyenzwa. Injongo ye-PLA kunye ne-PBAT yokudibanisa kukuphucula ukuqina, ukuguqulwa kwe-biodegradation kunye neempawu zokubumba ze-PLA. I-PLA kunye ne-PBAT azihambelani, ngoko ke ukusebenza kwe-PLA kunokuphuculwa kakhulu ngokukhetha ii-compatibilizers ezifanelekileyo.
Ixesha lokuposa: Jul-14-2022