Polylactic acid (PLA)ke "bio" e thehiloeng 'me e ka nchafatsoa e entsoeng ka thepa e tala ea starch e nkiloeng mehloling ea limela e ka nchafatsoang joalo ka poone le cassava.
Lisebelisoa tse tala tsa starch lia hloekisoa ho fumana tsoekere, e ntan'o lomosoa ka mefuta e itseng ho hlahisa lactic acid e phahameng haholo. PLA poone faeba lesela bao e seng lohiloeng e ka nako eo lik'hemik'hale synthesized ho synthesize itseng molek'hule boima ba acid e polylactic. E na le biodegradability e ntle. Ka mor'a ho sebelisoa, tlas'a maemo a itseng, e ka senyeha ka ho feletseng ke likokoana-hloko tsa tlhaho, ho hlahisa carbon dioxide le metsi ntle le ho silafatsa tikoloho. Sena se molemo haholo bakeng sa ho sireletsa tikoloho.Lesela le sa lohiloeng la PLAe nkoa e le thepa e baballang tikoloho.
Polylactic acid fiber e entsoe ka lihlahisoa tsa temo tse nang le starchy tse kang poone, koro le li-sugar beet, tse belisoang ho hlahisa lactic acid, ebe lia honyeha ebe li qhibiliha ka ho ohla. Polylactic acid fiber ke fiber ea maiketsetso e ka lengoang 'me e bonolo ho hōla. Litšila li ka senyeha ka tlhaho tlhahong.
Ts'ebetso ea biodegradable.
Lisebelisoa tse tala tsa fiber ea polylactic li ngata ebile li ka sebelisoa hape. Polylactic acid fibers e na le biodegradability e ntle 'me e ka senyeha ka ho feletseng ho ba carbon dioxide le H2O ka tlhaho ka mor'a ho lahloa. Ka bobeli li ka fetoha lisebelisoa tsa lactic acid starch ka photosynthesis. Kamora lilemo tse 2-3 mobung, matla a likhoele tsa PLA a tla nyamela. Haeba e patoa hammoho le litšila tse ling, e tla bola ka mor'a likhoeli tse 'maloa. Ntle le moo, acid ea polylactic e kenngoa ka hydrolyzed ho lactic acid ka acid kapa li-enzyme 'meleng oa motho. Asiti ea lactic ke sehlahisoa sa metabolic liseleng 'me se ka sebelisoa hape ka li-enzyme ho hlahisa carbon dioxide le metsi. Ka hona, likhoele tsa polylactic acid le tsona li na le biocompatibility e ntle.
Ts'ebetso ea ho monya mongobo
Likhoele tsa PLA li na le monyetla o motle oa mongobo le conductivity, joalo ka ho senyeha. Ts'ebetso ea ho monya mongobo e boetse e amana le morphology le sebopeho sa likhoele. Sebaka sa longitudinal sa likhoele tsa PLA se na le matheba a sa tsitsang le metopa e sa khaotseng, li-pores kapa mapetsong, a ka thehang habonolo litlamorao tsa capillary mme a bonts'a thepa e ntle ea ho monya, e mongobo le ea phallo ea metsi.
Tshebetso tse ding
E na le ho cha ho tlase le ho lieha ho itseng ha lelakabe; Ts'ebetso ea ho daea e mpe ho feta likhoele tse tloaelehileng tsa masela, ha e hanyetsane le asiti le alkali, 'me e bonolo ho hydrolyze. Nakong ea ts'ebetso ea ho daea, tlhokomelo e khethehileng e lokela ho lefshoa tšusumetsong ea acidity le alkalinity; Mamello e matla ho mahlaseli a kotsi a ultraviolet, empa a sekametse ho photodegradation; Kamora lihora tse 500 tsa ho pepeseha kantle, matla a likhoele tsa PLA a ka bolokoa hoo e ka bang 55% mme a ba le khanyetso e ntle ea boemo ba leholimo.
Thepa e tala bakeng sa tlhahiso ea polylactic acid fiber (PLA) ke lactic acid, e entsoeng ka starch ea poone, kahoo mofuta ona oa fiber o boetse o bitsoa fiber ea poone. E ka etsoa ka ho belisa li-beet tse tsoekere kapa lijo-thollo ka tsoekere ho fokotsa litšenyehelo tsa ho lokisa lactic acid polima. Boima bo phahameng ba molek'hule polylactic acid e ka fumanoa ka polymerization ea lik'hemik'hale tsa lactic acid cyclic dimers kapa polymerization e tobileng ea lactic acid.
Lihlahisoa tse entsoeng ka acid ea polylactic li na le biocompatibility e ntle, bioabsorbability, antibacterial le flame retardancy, 'me PLA e na le ho hanyetsa mocheso ho li-polymers tsa thermoplastic tse senyehang.
Polylactic acid fiber e ka bola ka carbon dioxide le metsi mobung kapa metsing a leoatle. Ha e chesoa, ha e ntše likhase tse chefo ebile ha e bake tšilafalo. Ke fiber e tsitsitseng ea tikoloho. Lesela la eona le utloahala le le monate, le na le mokelikeli o motle, le hanyetsana le mahlaseli a UV, le na le mollo o fokolang, 'me le sebetsa hantle haholo. E loketse mefuta e fapaneng ea feshene, liaparo tsa boikhathollo, thepa ea lipapali le lihlahisoa tsa bohloeki, 'me e na le menyetla e pharaletseng ea ts'ebeliso.
Nako ea poso: May-23-2024