Mabapi le PLA
PLA, eo hape e tsejoang e le polylactide, ke polyester e entsoeng ka lactic acid.Asiti ea polylactic e na le biodegradability e ntle haholo, e lumellana le ho monya.Ke ntho e se nang chefo, e sa hloekiseng polymer ea maiketsetso.Lihlahisoa tsa eona tse tala ke lactic acid, e hlahisoang haholo ke ho belisoa ha starch, joalo ka poone le raese.E ka boela ea fumanoa ka selulose, litšila tsa kichineng kapa litšila tsa tlhapi.
PLA e na le mefuta e mengata ea lihlahisoa tse tala, 'me lihlahisoa tse entsoeng ho eona li ka kenngoa ka ho toba kapa tsa chesoa, tse ka finyellang litlhoko tsa tsoelo-pele e tsitsitseng.Ponaletso e ntle le ho tiea ho itseng, biocompatibility le ho hanyetsa mocheso oa PLA ke mabaka a mantlha a ts'ebeliso ea eona e atileng.
Ho feta moo, PLA e na le thermoplasticity 'me e ka sebelisoa libakeng tse ngata, tse kang thepa ea ho paka, likhoele, joalo-joalo. E sebelisoa haholo-holo bakeng sa lihlooho tse lahliloeng tse kang tableware le thepa ea ho paka, hammoho le lisebelisoa tsa motlakase le tlhokomelo ea bongaka.
Ha ho bapisoa le lihlahisoa tsa petrochemical tsa setso, tšebeliso ea matla ha ho etsoa polylactic acid ke 20% feela ho 50% ea lihlahisoa tsa petrochemical, 'me carbon dioxide e hlahisoang ke 50% feela ea lihlahisoa tsa petrochemical.Ka hona, nts'etsopele ea lisebelisoa tse senyehang tsa polylactic acid e ea hlokahala ho fokotsa mathata a lefats'e a tikoloho le matla.
Likarolo tsa PLA
1. Biodegradability
Ha ho bapisoa le lipolasetiki tsa setso, asiti ea polylactic e ka senyeha ho ba CO2 le H2O ka likokoana-hloko le leseli.Lihlahisoa tsa eona tsa ho senyeha ha li chefo ebile ha li kotsi, 'me li ke ke tsa silafatsa tikoloho.The monomer bakeng sa ho hlahisa polylactic acid ke lactic acid, e ka belisoang ke lijalo tse kang koro, raese le beet ea tsoekere kapa lihlahisoa tsa temo.Ka hona, thepa e tala bakeng sa ho hlahisa acid ea polylactic e ka tsosolosoa.Asiti ea polylactic e le ntho e ntseng e hlaha e ka senyehang e sebelisoa haholo.
2. Biocompatibility le Absorbability
Asiti ea polylactic e ka hydrolyzed ka acid kapa enzyme ho theha lactic acid 'meleng oa motho.Joaloka metabolite ea lisele, lactic acid e ka boela ea sebelisoa ke li-enzyme 'meleng, ho hlahisa CO2 le H2O.Ka hona, acid ea polylactic ha e na chefo ebile ha e kotsi 'meleng oa motho, ho feta moo e na le biocompatibility e ntle le bioabsorbability.Polylactic acid e netefalitsoe ke US Food and Drug Administration e ka sebelisoang e le biomaterial bakeng sa ho kenngoa bathong.
3. Ho Itloaetsa 'Mele
Joalo ka thepa ea polymer ea thermoplastic, asiti ea polylactic e na le polasetiki e ntle le thepa ea ho sebetsa 'meleng, e nang le ntlha e phahameng ea ho qhibiliha le crysallinity, elasticity e ntle le flexibilit, le thermoformability e ntle haholo.Lisebelisoa tsa polylactic acid, joalo ka lisebelisoa tsa polymer tse kang polypropylene (PP), polystyrene (PS), le polyphenylene ether resin (PPO), li ka sebetsoa ka extrusion, ho otlolla, le ho bopeha ka ente.
Nako ea poso: Aug-18-2023
