Isikhwama sokupakisha esonakele sisho ukuwohloka, kodwa isikhwama sokupakisha esonakele sihlukaniswe ngezinhlobo ezimbili: esibolile futhi esibolekayo ngokuphelele.Izikhwama zokupakisha ezonakele zibhekisela ekungezeni inani elithile lezithasiselo (njengesitashi, isitashi esishintshiwe noma enye i-cellulose, ama-photosensitizers, ama-biodegraders, njll.) ukuwohloka.Izikhwama zokupakisha ezonakaliswe ngokuphelele zibhekisela ezikhwameni zokupakisha zepulasitiki ezonakaliswe ngokuphelele zibe amanzi kanye ne-carbon dioxide.Umthombo oyinhloko walokhu okubolayo ngokuphelele ukugaywa kommbila kanye nomdumbula kube i-lactic acid, noma i-PLA.
I-Polylactic acid (PLA) iyinoveli ye-biological matrix kanye nezinto ezivuselelekayo ezibolayo.Ukusebenzisa isitashi njengempahla eluhlaza, i-saccharification ukuthola i-glucose, bese ivubela i-glucose nezinhlobo ezithile ukuze uthole i-lactic acid ehlanzekile, bese uhlanganisa i-polylactic acid ngesisindo esithile samangqamuzana ngokusebenzisa ukuhlanganiswa kwamakhemikhali.Ine-biodegradability enhle.Ngemva kokusetshenziswa, kungacekelwa phansi ngokuphelele ama-microorganisms emvelweni ngaphansi kwezimo ezithile zokukhiqiza i-carbon dioxide namanzi, engangcolisi imvelo.Kuzuzisa kakhulu ukuvikela imvelo futhi kuyimpahla ehambisana nemvelo kubasebenzi.
Njengamanje, ukwaziswa okuyinhloko okusekelwe ku-bio yesikhwama sokupakisha esonakaliswa ngokuphelele sakhiwe i-PLA+PBAT, engachithwa ngokuphelele ibe amanzi kanye ne-carbon dioxide ezinyangeni ezingu-3-6 ngaphansi kwezimo zokuvundisa (ama-60-70 degrees), ngaphandle kokungcolisa imvelo. imvelo.Kungani ungeza i-PBAT, umkhiqizi ochwepheshe wokupakisha okuguquguqukayo, incazelo elandelayo ukuthi i-PBAT adipic acid, 1,4-butanediol, terephthalic acid copolymer, kakhulu i-biodegradable synthetic synthetic aliphatic polymer enephunga elimnandi yaseTaiwan, i-PBAT inokuguquguquka okuhle kakhulu, ingayenza. ifilimu extrusion, ukucubungula ovuthelayo, enamathela nokunye ukucubungula.Inhloso yokuhlanganisa i-PLA ne-PBAT ukuthuthukisa ukuqina, ukubola kwe-biodegradability kanye nokwakheka kwe-PLA.I-PLA ne-PBAT azihambelani, ngakho ukukhetha isifanelana esifanele kungathuthukisa kakhulu ukusebenza kwe-PLA.
Isikhathi sokuthumela: Jun-30-2022