I-PLA yenye yezona zinto ziphandwe kakhulu kwaye zijolise kwi-biodegradable materials ngaphakathi nangaphandle, kunye nezonyango, ukupakishwa, kunye nokusetyenziswa kwefayibha ibe ziindawo zayo ezintathu ezithandwayo. I-PLA yenziwa ikakhulu kwi-asidi ye-lactic yendalo, ene-biodegradability elungileyo kunye ne-biocompatibility. Umthwalo wayo womjikelo wobomi kokusingqongileyo uphantsi kakhulu kunolo wezinto ezisekelwe kwipetroleum, kwaye ithathwa njengeyona nto ithembisayo yokupakisha izinto eziluhlaza.
I-Polylactic acid (PLA) inokuchithwa ngokupheleleyo kwi-carbon dioxide kunye namanzi phantsi kweemeko zendalo emva kokulahlwa. Inokumelana kwamanzi okulungileyo, iipropati zomatshini, i-biocompatibility, inokuthi ifakwe kwizinto eziphilayo, kwaye ayinakho ukungcola kokusingqongileyo. I-PLA nayo ineempawu ezilungileyo zoomatshini. Inamandla okuxhathisa okuphezulu, ukuguquguquka okuhle kunye nokuzinza kwe-thermal, iplastiki, i-processability, ayikho i-discoloration, i-permeability efanelekileyo kwi-oksijini kunye nomphunga wamanzi, kunye nokubonakala kakuhle, i-anti-mold kunye ne-antibacterial properties, kunye nobomi benkonzo ye-2-3 iminyaka.
Ukupakishwa kokutya okusekelwe kwifilimu
Eyona nto ibalulekileyo isalathisi sokusebenza kwezinto zokupakisha kukuphefumula, kwaye intsimi yesicelo sale nto ekupakishweni inokumiselwa ngokusekelwe kukuphefumula kwayo okwahlukileyo. Ezinye izinto zokupakisha zifuna i-oxygen permeability ukubonelela ngeoksijini eyaneleyo kwimveliso; Ezinye izinto zokupakisha zifuna iipropati zesithintelo se-oksijini ngokwezinto eziphathekayo, ezifana nokupakishwa kwesiselo, esifuna izinto ezinokuthintela i-oksijini ukuba ingene kwi-package kwaye ngaloo ndlela inqanda ukukhula kwesikhunta. I-PLA inomqobo wegesi, umqobo wamanzi, ukungafihli, kunye nokuprintwa kakuhle.
Ukungafihli
I-PLA inokungafihli kakuhle kunye nokumenyezela, kwaye ukusebenza kwayo okugqwesileyo kuthelekiseka naleyo yephepha leglasi kunye ne-PET, ezingenazo ezinye iiplastiki ezibolayo. Ukungafihli kunye nokucwebezela kwe-PLA ngama-2-3 amaxesha efilimu ye-PP eqhelekileyo kunye namaxesha angama-10 e-LDPE. Ukucaca kwayo okuphezulu kwenza ukusetyenziswa kwe-PLA njengezinto zokupakisha ezithandekayo ngobuhle. Ukupakishwa kweelekese, okwangoku, iipakethe ezininzi zeelekese kusetyenziso lwentengisoIfilimu yokupakisha ye-PLA.
Inkangeleko kunye nokusebenza kokuifilimu yokupakishaziyafana nefilimu yokupakishwa yelekese yesintu, enokucaca okuphezulu, ukugcinwa kweqhina okugqwesileyo, ukuprintwa, kunye namandla. Ikwanayo neempawu ezibalaseleyo zomqobo, ezinokugcina ngcono ivumba lelekese.
umqobo
I-PLA inokwenziwa kwiimveliso zefilimu ezibhityileyo ezinokucaca okuphezulu, iipropathi ezilungileyo zesithintelo, ukusetyenzwa okugqwesileyo, kunye neempawu zoomatshini, ezinokusetyenziselwa ukupakishwa okuguquguqukayo kweziqhamo kunye nemifuno. Inokwenza indawo efanelekileyo yokugcina iziqhamo nemifuno, igcine amandla azo, ilibazise ukwaluphala, ize igcine umbala, ivumba, incasa nenkangeleko yazo. Kodwa xa isetyenziswa kwizinto zokwenyani zokupakisha, ezinye iinguqulelo zisafuneka ukuze zilungelelanise neempawu zokutya ngokwazo, ukuze kuphunyezwe iziphumo ezingcono zokupakisha.
Ngokomzekelo, kwizicelo ezisebenzayo, iimvavanyo zifumene ukuba iifilimu ezixubileyo zingcono kuneefilimu ezicocekileyo. Yena Yiyao wapakisha i-broccoli kunye nefilimu ecocekileyo ye-PLA kunye nefilimu edibeneyo ye-PLA, kwaye wayigcina ku-(22 ± 3) ℃. Wayevavanya rhoqo utshintsho kwiimpawu ezahlukeneyo ze-physiological and biochemical of broccoli ngexesha lokugcina. Iziphumo zibonise ukuba ifilimu edibeneyo ye-PLA inefuthe elihle lokugcinwa kwi-broccoli egcinwe kwiqondo lokushisa. Iyakwazi ukudala inqanaba lokufuma kunye nomoya olawulwayo ngaphakathi kwesikhwama sokupakisha esilungele ukulawula ukuphefumla kwe-broccoli kunye ne-metabolism, ukugcina umgangatho wokubonakala kwe-broccoli kunye nokugcina ukunambitheka kwayo kwasekuqaleni kunye nencasa, ngaloo ndlela ukwandisa ubomi beshelufu ye-broccoli kwindawo yokushisa kwegumbi nge-23 iintsuku.
Umsebenzi we-Antibacterial
I-PLA inokudala indawo eneasidi ebuthathaka kumphezulu wemveliso, ibonelela ngesiseko seempawu zokulwa ne-antibacterial kunye ne-anti mold. Ukuba ezinye ii-antibacterial agents zisetyenziselwa ukudibanisa, izinga lokulwa ne-antibacterial lingafikelela ngaphezu kwe-90%, okwenza ukuba lilungele ukupakishwa kwe-antibacterial yemveliso. U-Yin Min wafunda umphumo wokugcinwa kohlobo olutsha lwefilimu ye-PLA nano antibacterial composite kwiikhowa ezidliwayo usebenzisa i-Agaricus bisporus kunye ne-Auricularia auricula njengemizekelo, ukwenzela ukwandisa ubomi beshelufu yamakhowa adliwayo kunye nokugcina umgangatho wabo omhle. Iziphumo zibonise ukuba ifilimu ehlanganisiweyo ye-PLA/rosemary (REO)/AgO inokulibazisa ngokufanelekileyo ukunciphisa umxholo we-vitamin C kwi-auricularia auricula.
Xa kuthelekiswa nefilimu ye-LDPE, ifilimu ye-PLA, kunye nefilimu ye-PLA / GEO / TiO2, i-permeability yamanzi yefilimu edibeneyo ye-PLA / GEO / Ag iphezulu kakhulu kunezinye iifilimu. Kule nto, kunokugqitywa ukuba kunokuthintela ngokufanelekileyo ukubunjwa kwamanzi adibeneyo kunye nokufezekisa umphumo wokuthintela ukukhula kwe-microbial; Kwangaxeshanye, ikwanayo nefuthe elihle kakhulu le-antibacterial, elinokuthi lithintele ngokufanelekileyo ukuveliswa kwee-microorganisms ngexesha lokugcinwa kwendlebe yegolide, kwaye inokwandisa kakhulu ubomi beshelufu ukuya kwiintsuku ezili-16.
Xa kuthelekiswa nefilimu eqhelekileyo ye-PE yokutya, i-PLA inesiphumo esingcono
Thelekisa iziphumo zogcino lweIfilimu yeplastiki ye-PEukusonga kunye nefilimu ye-PLA kwi-broccoli. Iziphumo zibonise ukuba ukusebenzisa ukupakishwa kwefilimu ye-PLA kunokuthintela ukuchithwa kwe-yellowing kunye ne-bulb ye-broccoli, ngokufanelekileyo ukugcina umxholo we-chlorophyll, i-vitamin C, kunye ne-soluble solids kwi-broccoli. Ifilimu ye-PLA inokukhethwa kwegesi ebalaseleyo, enceda ukudala indawo ephantsi ye-O2 kunye ne-CO2 ephezulu yokugcina ngaphakathi kweengxowa zokupakisha ze-PLA, ngaloo ndlela inqanda imisebenzi yobomi be-broccoli, ukunciphisa ukulahlekelwa kwamanzi kunye nokusetyenziswa kwesondlo. Iziphumo zibonise ukuba xa kuthelekiswa nokupakishwa kweplastiki ye-PE, ukupakishwa kwefilimu ye-PLA kunokwandisa ubomi beshelufu ye-broccoli kwindawo yokushisa kwe-1-2 iintsuku, kwaye umphumo wokulondoloza ubalulekile.
Ixesha lokuposa: Oct-09-2024