Selokhu kwavela ipulasitiki, ibisetshenziswa kakhulu kuzo zonke izici zempilo yabantu, okuletha inzalo enkulu ekukhiqizeni nasekuphileni kwabantu. Kodwa-ke, nakuba kulula, ukusetshenziswa kwayo kanye nokumosha nakho kuholela ekungcolisekeni kwemvelo okwandayo, okuhlanganisa nokungcoliswa okumhlophe okufana nemifula, amapulazi kanye nolwandle.
I-Polyethylene (PE) iyipulasitiki yendabuko esetshenziswa kakhulu futhi ingenye indlela enkulu ezintweni ezingaboli.
I-PE ine-crystallinity enhle, izakhiwo zokuvimbela umhwamuko wamanzi kanye nokumelana nesimo sezulu, futhi lezi zakhiwo zingabizwa ngokuhlangene ngokuthi "izici ze-PE".
Enqubweni yokufuna ukuxazulula "ukungcoliswa kwepulasitiki" kusuka empandeni, ngaphezu kokuthola ezinye izinto ezintsha ezihambisana nemvelo, indlela ebaluleke kakhulu ukuthola indawo ekhona ezintweni ezikhona ezingacekelwa phansi imvelo futhi zibe yingxenye. zomjikelezo wokukhiqiza Izinto ezinobungane, ezingagcini nje ngokusindisa inqwaba yabasebenzi kanye nezindleko zezinto ezibonakalayo, kodwa futhi zixazulula inkinga yamanje yokungcoliswa kwemvelo engathi sína ngesikhathi esifushane.
Izakhiwo ze-biodegradable materials zihlangabezana nezidingo zokusetshenziswa ngesikhathi sokugcinwa, futhi ngemva kokusetshenziswa, zingahlehliswa zibe yizinto ezingenabungozi emvelweni ngaphansi kwezimo zemvelo.
Izinto ezihlukene ezibolayo zinezici ezihlukene futhi zinezinzuzo zazo kanye nokubi. Phakathi kwazo, i-PLA ne-PBAT zinezinga eliphezulu lokuthuthuka kwezimboni, futhi amandla azo okukhiqiza athatha isikhundla esibalulekile emakethe. Ngaphansi kokugqugquzelwa kwe-oda le-plastic restriction, imboni yezinto ezibolayo ezibolayo ishisa kakhulu, futhi izinkampani ezinkulu zepulasitiki zandise ukukhiqizwa kwazo. Njengamanje, umthamo wokukhiqiza wonyaka we-PLA womhlaba wonke ungamathani angaphezu kuka-400,000, futhi kulindeleke ukuthi udlule amathani ayizigidi ezi-3 eminyakeni emithathu ezayo. Ngokwezinga elithile, lokhu kukhombisa ukuthi izinto ze-PLA ne-PBAT ziyizinto ezingabolikala ngokuqashelwa okuphezulu emakethe.
I-PBS ezintweni ezibolayo ezibolayo iphinde ibe into enezinga eliphezulu lokuqashelwa, ukusetshenziswa okwengeziwe, kanye nobuchwepheshe obuvuthiwe.
Amandla okukhiqiza akhona kanye nokwenyuka okulindelekile kumthamo wokukhiqiza wesikhathi esizayo wezinto eziwohlokayo njenge-PHA, PPC, PGA, PCL, njll. kuzoba kuncane, futhi zisetshenziswa kakhulu emikhakheni yezimboni. Isizathu esiyinhloko ukuthi lezi zinto ezibolayo zisesesigabeni sokuqala, ubuchwepheshe abukavuthwa futhi izindleko ziphezulu kakhulu, ngakho-ke idigri yokuqashelwa ayiphezulu, futhi okwamanje ayikwazi ukuncintisana ne-PLA ne-PBAT.
Izinto ezihlukene ezibolayo zinezici ezihlukene futhi zinezinzuzo zazo kanye nokubi. Nakuba bengenazo ngokugcwele “izici ze-PE”, empeleni, izinto ezivamile ezibolayo ngokuyisisekelo ziyi-aliphatic polyester, njenge-PLA ne-PBS, equkethe ama-esters. I-PE eboshiwe, ibhondi ye-ester kuketango layo lamangqamuzana ikunikeza ukubola kwe-biodegradability, futhi iketango le-aliphatic liyinika "izici ze-PE".
Indawo yokuncibilika kanye nezakhiwo zemishini, ukumelana nokushisa, izinga lokuwohloka, kanye nezindleko ze-PBAT ne-PBS ngokuyisisekelo zingamboza ukusetshenziswa kwe-PE embonini yemikhiqizo elahlwayo.
Izinga lokuthuthuka kwezimboni ze-PLA kanye ne-PBAT liphezulu uma kuqhathaniswa, futhi liwumhlahlandlela wentuthuko enamandla ezweni lami. I-PLA ne-PBAT inezici ezihlukile. I-PLA iyipulasitiki eqinile, kanti i-PBAT iyipulasitiki ethambile. I-PLA enokucutshungulwa kwefilimu eshaywa umoya ixutshwa kakhulu ne-PBAT enokuqina okuhle, engathuthukisa ukucutshungulwa kwefilimu ephephethwayo ngaphandle kokulimaza izakhiwo zayo zebhayoloji. ukuwohloka. Ngakho-ke, akulona ihaba ukusho ukuthi i-PLA ne-PBAT seziphenduke inkambi yezinto ezibonakalayo eziwohlokayo.
Isikhathi sokuthumela: Jan-14-2022