Lilemong tsa morao tjena, ka litlhoko tse ntseng li eketseha tsa ntlafatso ea tikoloho le ho matlafatsoa ho tsoelang pele ha taolo ea tšilafalo ea polasetiki ea naha, indasteri ea thepa e senyehang ea tlhaho ea China e hlahisitse monyetla o moholo oa nts'etsopele.
Lintho tse ncha tse ka senyehang, tse eteletsoeng pele ke lipolasetiki tse senyehang habonolo, tseo ho nkoang hore ke eona tharollo e molemo ka ho fetisisa ea “tšilafalo e tšoeu” ea lipolasetiki tse lahloang, li ntse li tla tlhokomelong ea batho haholoanyane.
Ka mor'a moo, ke rata ho hlahisa lisebelisoa tse ling tse sebelisoang hangata.
PLA
Polylactic acid (Poly lactic acid PLA) ke thepa e senyehang ka ho fetisisa e sebelisoang ka ho fetisisa, e tsejoang hape e le polylactide, e leng sieo ka tlhaho 'me ka kakaretso e entsoe polymer ka lactic acid e le eona ntho e ka sehloohong e tala.
Molao-motheo o akaretsang ke hore lisebelisoa tse tala tsa starch li saccharified ho tsoekere, ebe tsoekere le libaktheria tse itseng lia belisoa ho hlahisa asiti e phahameng ea lactic, ebe acid e polylactic e nang le boima bo itseng ba molek'hule e kopantsoe ke motsoako oa lik'hemik'hale.
PBAT.
PBAT ke ea polasetiki ea thermoplastic biodegradable. Ke copolymer ea butylene adipate le butylene terephthalate. E na le litšobotsi tsa PBA le PBT ka bobeli. Ha e na feela ductility e ntle le elongation nakong ea khefu, empa hape e na le ho hanyetsa mocheso o motle le thepa ea tšusumetso. Ho feta moo, e boetse e na le biodegradability e ntle haholo.
Har'a tsona, lisebelisoa tse tala tse kang butanediol, oxalic acid le PTA li fumaneha habonolo 'me li ka sebelisoa ka mokhoa o pharaletseng ka mefuta e mengata, joalo ka ente ea ente, extrusion molding, blow molding joalo-joalo.
Hajoale, lihlahisoa tsa polasetiki tse senyehang ka tlhaho tse sebelisoang ka bongata 'marakeng li fetotsoe kapa li kopantsoe, moo PBAT e sebelisoang haholo le PLA. Ka mohlala, mokotla oa polasetiki o ka senyehang o sebelisoang ka tekanyo e kholo ke thepa e kopantsoeng ea PLA le PBAT.
Papiso ea lits'ebetso tse tlase lipakeng tsa PBAT le PLA
PBS.
PBS e bitsoa polybutylene succinate. Lilemong tsa bo-1990, Showa Polymer Company ea Japane e ile ea qala ho sebelisa isocyanate e le chain extender 'me ea arabela ka polyester ea boima ba molek'hule e entsoeng ke Polycondensation ea dicarboxylic glycol ho lokisa li-polymer tse boima ba molek'hule. PBS polyester e ile ea qala ho hohela tlhokomelo e kholo joalo ka mofuta o mocha oa lipolasetiki tse senyehang. Ha ho bapisoa le li-polyester tse ling tsa setso tse senyehang, PBS e na le melemo ea theko e tlase ea tlhahiso, sebaka se batlang se le holimo se qhibilihang, ho hanyetsa mocheso hantle le thepa ea mochini. mohloli oa eona o tala o ka fumanoa eseng feela ho tsoa mehloling ea peterole, empa hape le ho tsoa mehloling ea baeloji fermentation. tlas'a boemo ba hore oli le lisebelisoa tse ling tse sa tsosolositsoeng li ntse li fela ka ho eketsehileng, tšobotsi ena e na le bohlokoa bo boholo.
Kakaretso, papiso ea thepa lipakeng tsa PBS,PLS,PBAT le PHA
Hona joale, thepa ea thepa ea li-plastiki tse sebelisoang hangata li fapane. PLA e na le pepenene e ntle, e benyang, sebaka se phahameng se qhibilihang le matla, empa e na le matla a tlase a thata le khanya ea kristale. PBAT e na le litšobotsi tsa PBA le PBT ka bobeli, 'me e na le ductility e ntle le bolelele nakong ea khefu. Empa mokoallo oa eona oa mouoane oa metsi le mokoallo oa oksijene ha li ntle. PBS e na le ho hanyetsa metsi hantle, ho hanyetsa mocheso le thepa e feletseng, fensetere e pharaletseng ea mocheso oa mocheso, 'me e na le ts'ebetso e ntle ka ho fetisisa ea ho sebetsa ka polasetiki e senyehang ea bokahohleng. Mocheso o chesang oa deformation oa PBS o haufi le 100C, 'me o ka ba holimo ho feta 100C ka mor'a ho fetoloa. Leha ho le joalo, PBS e boetse e na le mefokolo e kang matla a tlaase a ho qhibiliha le sekhahla sa kristale se liehang. Mabapi le biodegradability, maemo a ho senyeha ha PLA a thata haholo, PBS le PBAT li bonolo ho senyeha. Hoa lokela ho hlokomeloa hore biodegradation ea PLA, PBS le PBAT e ke ke ea etsahala tlas'a maemo leha e le afe, 'me hangata e senyeha ke li-enzyme le likokoana-hloko tikolohong ea manyolo, mobu, metsi le sludge e entsoeng.
Ho akaretsa, ts'ebetso ea thepa e tala ea polasetiki e senyehileng e na le mefokolo ea eona, empa kamora ho kopanya, ho kopanya, lithuso le liphetoho tse ling, e ka koahela ts'ebeliso ea lipolasetiki tse lahliloeng joalo ka PE, PP ka har'a liphutheloana, masela, lisebelisoa tse lahliloeng. joalo joalo.
Nako ea poso: 20-12-22