I-PLA ingenye yezinto ezicwaningwa kakhulu futhi ezigxilwe kakhulu ezibolayo ngaphakathi nangaphandle, ngezokwelapha, ukupakishwa, kanye nezicelo zefayibha okuyizindawo zayo ezintathu ezithandwayo ezisetshenziswayo. I-PLA ngokuyinhloko yenziwe nge-lactic acid yemvelo, enokonakala okuhle kwe-biodegradability kanye ne-biocompatibility. Umthwalo wayo womjikelezo wempilo endaweni uphansi kakhulu kunalowo wezinto ezisekelwe ku-petroleum, futhi uthathwa njengento ethembisa kakhulu yokupakisha eluhlaza.
I-Polylactic acid (PLA) ingabola ngokuphelele ibe yi-carbon dioxide namanzi ngaphansi kwezimo zemvelo ngemva kokulahlwa. Inokumelana kahle namanzi, izakhiwo zemishini, i-biocompatibility, ingamuncwa izinto eziphilayo, futhi ayinakho ukungcola emvelweni. I-PLA iphinde ibe nezakhiwo ezinhle zemishini. Inamandla okumelana nokuqina, ukuguquguquka okuhle kanye nokuzinza kokushisa, ipulasitiki, ukucutshungulwa, akukho ukushintshashintsha kombala, ukufinyeleleka okuhle kwe-oksijeni nomhwamuko wamanzi, kanye nokungafihli kahle, izakhiwo zokulwa nesikhunta kanye ne-antibacterial, nempilo yesevisi ye-2-3 iminyaka.
Ukupakishwa kokudla okusekelwe kwifilimu
Isibonakaliso esibaluleke kakhulu sokusebenza sezinto zokupakisha umoya wokuphefumula, futhi inkambu yokusetshenziswa yale nto emaphaketheni inganqunywa ngokusekelwe ekuphefumuleni kwayo okuhlukile. Ezinye izinto zokupakisha zidinga ukungena kwe-oxygen ukuze kuhlinzekwe ukunikezwa kwe-oxygen eyanele kumkhiqizo; Ezinye izinto zokupakisha zidinga izakhiwo zokuvimbela umoya-mpilo ngokwezinto ezibonakalayo, njengokupakisha isiphuzo, okudinga izinto ezingavimbela i-oksijini ukuthi ingangeni emaphaketheni futhi ngaleyo ndlela ivimbele ukukhula kwesikhunta. I-PLA inomgoqo wegesi, umgoqo wamanzi, obala, nokuphrinta okuhle.
Ukungafihli
I-PLA inokucaca okuhle nokucwebezela, futhi ukusebenza kwayo okuhle kakhulu kuqhathaniswa nokwephepha lengilazi ne-PET, amanye amapulasitiki abolayo angenawo. Ukucaca nokucwebezela kwe-PLA kuphindwe izikhathi ezingu-2-3 kunefilimu evamile ye-PP futhi izikhathi ezingu-10 kune-LDPE. Ukuba sobala kwayo okuphezulu kwenza ukusetshenziswa kwe-PLA njengento yokupakisha kujabulise ngobuhle. Okokufaka uswidi, okwamanje, amaphakheji amaningi amaswidi asetshenziswa emaketheIfilimu yokupakisha ye-PLA.
Ukubukeka nokusebenza kwalokhuifilimu yokupakishazifana nefilimu yokupakisha uswidi yendabuko, enokucaca okuphezulu, ukugcinwa kwefindo elihle kakhulu, ukuphrinta, namandla. Ibuye ibe nezindawo ezinhle kakhulu zokuthibela, ezingagcina kangcono iphunga likaswidi.
umgoqo
I-PLA ingenziwa imikhiqizo yefilimu emincane enokucaca okuphezulu, izakhiwo ezinhle zokuvimbela, ukucutshungulwa okuhle kakhulu, kanye nezakhiwo zemishini, ezingasetshenziselwa ukupakishwa okuguquguqukayo kwezithelo nemifino. Kungakha indawo efanelekayo yokugcina izithelo nemifino, kulondoloze amandla azo, kubambezele ukuguga, futhi kulondoloze umbala, iphunga, ukunambitheka nokubukeka kwazo. Kodwa uma isetshenziswa ezintweni zokupakisha zangempela, ezinye izinguquko zisadingeka ukuze zivumelane nezimpawu zokudla ngokwazo, ukuze kuzuzwe imiphumela engcono yokupakisha.
Isibonelo, ekusetshenzisweni okungokoqobo, ukuhlolwa kuthole ukuthi amafilimu axubile angcono kunamafilimu ahlanzekile. U-He Yiyao wapakisha i-broccoli ngefilimu ehlanzekile ye-PLA nefilimu eyinhlanganisela ye-PLA, wayigcina kokuthi (22 ± 3) ℃. Wahlola njalo izinguquko ezinkomba ezihlukahlukene ze-physiological and biochemical of broccoli ngesikhathi sokugcina. Imiphumela yabonisa ukuthi ifilimu eyinhlanganisela ye-PLA inomphumela omuhle wokulondoloza ku-broccoli egcinwe ekamelweni lokushisa. Ingakha izinga lomswakamo kanye nomoya olawulwayo ngaphakathi kwesikhwama sokupakisha esiza ekulawuleni ukuphefumula kwe-broccoli kanye ne-metabolism, igcine ikhwalithi yokubukeka ye-broccoli kanye nokugcina ukunambitheka nokunambitheka kwayo kwasekuqaleni, ngaleyo ndlela yandise impilo yeshalofu ye-broccoli ekamelweni lokushisa ngama-23. izinsuku.
Umsebenzi we-antibacterial
I-PLA ingakha indawo ene-asidi ebuthakathaka ebusweni bomkhiqizo, inikeze isisekelo sezakhiwo ezilwa namagciwane kanye nesikhunta. Uma amanye ama-antibacterial agents esetshenziswa ngokuhlanganiswa, izinga le-antibacterial lingafinyelela ngaphezu kwama-90%, okwenza lifanele ukupakishwa kwe-antibacterial yomkhiqizo. U-Yin Min ufunde ngomthelela wokulondolozwa kohlobo olusha lwefilimu eyinhlanganisela ye-PLA nano elwa namagciwane kumakhowe adliwayo esebenzisa i-Agaricus bisporus ne-Auricularia auricula njengezibonelo, ukuze kunwetshwe isikhathi seshalofu samakhowe adliwayo futhi kugcinwe isimo sawo esihle sekhwalithi. Imiphumela yabonisa ukuthi ifilimu eyinhlanganisela ye-PLA/rosemary essential oil (REO)/AgO ingabambezela ngempumelelo ukuncishiswa kokuqukethwe kwevithamini C ku-auricularia auricula.
Uma kuqhathaniswa nefilimu ye-LDPE, ifilimu ye-PLA, nefilimu ye-PLA/GEO/TiO2, ukungena kwamanzi kwefilimu eyinhlanganisela ye-PLA/GEO/Ag kuphezulu kakhulu kunamanye amafilimu. Kulokhu, kungaphetha ngokuthi kungavimbela ngokuphumelelayo ukwakheka kwamanzi ahlanganisiwe futhi kufinyelele umphumela wokuvimbela ukukhula kwe-microbial; Ngesikhathi esifanayo, iphinde ibe nomphumela omuhle kakhulu we-antibacterial, ongavimbela ngokuphumelelayo ukukhiqizwa kwama-microorganisms ngesikhathi sokugcinwa kwendlebe yegolide, futhi inganweba kakhulu impilo yeshalofu ibe yizinsuku ezingu-16.
Uma kuqhathaniswa nefilimu yokudla evamile ye-PE, i-PLA inomphumela ongcono
Qhathanisa imiphumela yokulondolozaIfilimu yepulasitiki ye-PEukugoqa kanye nefilimu ye-PLA ku-broccoli. Imiphumela yabonisa ukuthi ukusebenzisa ukupakishwa kwefilimu ye-PLA kungavimbela ukuphuzi nokuchithwa kwe-bulb ye-broccoli, kugcina ngokuphumelelayo okuqukethwe kwe-chlorophyll, uvithamini C, nezinto eziqinile ezincibilikayo ku-broccoli. Ifilimu ye-PLA ine-permeability enhle kakhulu yokukhetha igesi, okusiza ukudala indawo yokugcina i-O2 kanye ne-CO2 ephezulu ngaphakathi kwezikhwama zokupakisha ze-PLA, ngaleyo ndlela ivimbele imisebenzi yokuphila ye-broccoli, ukunciphisa ukulahlekelwa kwamanzi kanye nokusetshenziswa kwezakhi. Imiphumela yabonisa ukuthi uma kuqhathaniswa ne-PE plastic wrap packaging, ukupakishwa kwefilimu ye-PLA kungandisa impilo yeshalofu ye-broccoli ekamelweni lokushisa ngezinsuku ezingu-1-2, futhi umphumela wokulondoloza ubalulekile.
Isikhathi sokuthumela: Oct-09-2024