Chifukwa cha kuipitsidwa kwa "kuipitsa koyera", maiko padziko lonse lapansi akhazikitsa lamulo loletsa malire la pulasitiki, lomwe limatha kuwola matumba apulasitiki kuti atenge masitolo akuluakulu ndi malo ogulitsira.Kuyang'anitsitsa mosamala kudzapeza kuti matumba apulasitiki owonongekawa ali pafupifupi onse amitundu yonseyi.Pbat+PLA+ST.Ndiye ubwino wa PBAT+PLA+ST ndi wotani?
Chimodzi: wowuma
Wowuma amagawidwa kwambiri mu zipatso kapena zipatso, mizu kapena masamba.Pali mpaka matani mamiliyoni mazana a matani a wowuma chaka chilichonse.Ndi chimodzi mwazinthu zambiri zongowonjezedwanso komanso zowonongeka.Ili ndi ubwino wa magwero ochuluka ndi mitengo yotsika.Komabe, chifukwa wowuma wachilengedwe amakhala ndi mawonekedwe a microcrystalline ndi mawonekedwe a granular, alibe ntchito yopangira thermoplastic, ndipo amayenera kusinthidwa kukhala wowuma wa armoplastic kuti akhale ndi ntchito yopangira thermoplastic.
Awiri: PBAT
Polycolic acid/phenyl -dysic acid dysol (PBAT) ndi mtundu wa poliyesitala wowonongeka womwe wakopa chidwi kwambiri.Ndipo ductility amathanso kuchepetsedwa kukhala madzi ndi mpweya woipa m'chilengedwe.
Komabe, mtengo wa nkhaniyi ndi wapamwamba, womwe umalepheretsa kugwiritsidwa ntchito kwake pamsika;Choncho, mtengo wake wotsika ndi wowuma degradable ndiye kusankha bwino ndi PBAT.
3: PLA
PLA (Polylactic Acid) imadziwikanso kuti polystumin.Kapangidwe ka polystumin ndikuipitsa, ndipo mankhwalawo amatha kuwonongeka, zomwe zimazindikirika m'chilengedwe.Choncho, ndi abwino wobiriwira polima zakuthupi.imodzi.
Komabe, pali zofooka zambiri mu ntchito zothandiza: PLA ali osauka toughness, kusowa elasticity ndi kusinthasintha, mawonekedwe olimba ndi brittleness, ndi otsika sungunuka mphamvu, wodekha crystalline mlingo, etc. Zolakwika pamwambazi zimachepetsa ntchito zawo m'zinthu zambiri.
Mapangidwe a mankhwala a PLA ali ndi zomangira zambiri za ester, zomwe zimapangitsa kuti hydrophilicity ikhale yovuta komanso mitengo yowonongeka iyenera kuyendetsedwa.Kuphatikiza apo, mtengo wa PLA ndi wapamwamba, womwe umawonjezera mtengo wazinthu zopangira ndikuchepetsa kukwezedwa kwake kwamalonda.Chifukwa chake, PLA imasinthidwa pazomwe zili pamwambazi.
PBAT ili ndi mawonekedwe ofewa, ductility amphamvu, ndi kuzungulira kwafupikitsa kuwonongeka;PLA ili ndi mawonekedwe a crispy, kulimba kosalimba, komanso kuzungulira kwanthawi yayitali.Choncho, kusakaniza ziwirizi ndi njira yabwino kwambiri yowonjezera ntchito.
Zinayi: PBAT/PLA zoyambira zakuthupi
Kusungunuka kwa PBAT ndi PLA ndi njira yosinthira thupi.Mfundo yaikulu ndiyofunika kugwirizanitsa bwino.Komabe, kusungunuka kwa PBAT ndi PLA ndi kwakukulu, kotero kuti kugwirizanitsa ndi koyipa, ndipo n'kovuta kusakaniza mofanana.
Kupititsa patsogolo kuyanjana kwa PBAT ndi PLA ndiye vuto lalikulu.Chidebe chimodzi kapena zingapo ziyenera kuwonjezeredwa kusakaniza kwa kusakaniza kuti zikhale bwino ndi mawonekedwe a PBAT ndi PLA.Zotengera zomwe zimagwiritsidwa ntchito kwambiri ndi: plasticizers, reactivity, reaction, and polymer polima wolimba.
PLA ndi PBAT zili ndi magwiridwe antchito, kotero payenera kukhala chiŵerengero chabwino kwambiri cha magwiridwe antchito.
1. Gawo la PLA limakwera kufika pa 40% mpaka ma node.Kutambasula kwazinthuzo kumachepetsedwa poyamba ndikuwonjezeka.
2. Ngati zinthu za PLA zili zazikulu kuposa 70%, zinthuzo zimakhala zowonongeka kwambiri ndipo sizingawombedwe mufilimuyi.Chifukwa chake, gawo la PLA ku PBAT liyenera kusungidwa pafupifupi 1: 1 malinga ndi momwe zowonjezera zilili.
【Kuwonongeka kwa magwiridwe antchito】
Yankho loyamba la kuwonongeka kwa zinthu ndikuti kuyankha kwa hydrolyzed kwa mamolekyu amadzi akulowa.Ngati ndi chinthu chosiyana cha PBAT, ndizovuta kunyozetsa chifukwa mamolekyuwa ali ndi zomangira zolimba za ester.Mamolekyu a PLA amatha kuwonongeka mkati ndi madzi.Chifukwa chake, kuchuluka kwa zinthu za PLA, kuwononga zinthu mwachangu.
Nthawi yotumiza: Sep-08-2022