Cov txheej txheem synthesis thiab cov khoom ntawm polylactic acid (PLA)
Sep 26, 2025
Cov txheej txheem synthesis ntawm polylactic acid (PLA)
Feem ntau muaj ob txoj hauv kev hluavtaws rau polylactic acid (PLA): qhov ncaj qha polycondensation ntawm lactic acid
Nplhaib- qhib polymerization ntawm (DPC) thiab lactide (ROP).
Qhov ncaj qha condensation polymerization ntawm lactic acid yog tsim los ntawm qhov ncaj qha condensation polymerization ntawm lactic acid li monomer. Txoj kev no tsis tas yuav tsum tau ntxiv cov catalyst. Tsuas yog lactic acid thiab cov kuab tshuaj yog xav tau rau cov tshuaj tiv thaiv polymerization. Cov txheej txheem ntws yog qhov yooj yim thiab kev ua haujlwm yooj yim, uas tuaj yeem txo cov nqi tsim khoom thiab txhim kho kev tsim khoom.
Lactide (LA) nplhaib-qhib polymerization yog cov tshuaj tiv thaiv uas lactide yog siv los ua cov monomer thiab ua tiav ob txheej txheem ntawm lub nplhaib-qhib thiab polymerization los ua cov kab tawm siab-molecular polymer. Txoj kev no zoo hloov cov cyclic monomers rau hauv siab -molecular- hnyav polymers los ntawm lub nplhaib- qhib cov tshuaj tiv thaiv polymerization, nrog rau kev tswj tau zoo ntawm cov tshuaj tiv thaiv. Cov txiaj ntsig polylactic acid (PLA) tuaj yeem ua tau raws li nws qhov kev thov dav dav hauv thaj chaw ntawm cov ntaub ntawv biodegradable.
Cov yam ntxwv ntawm polylactic acid (PLA):
Polylactic acid (PLA), raws li bio-raws li thiab biodegradable khoom, muaj ntau yam khoom tshwj xeeb:
Biodegradability
Polylactic acid (PLA) tuaj yeem decomposed los ntawm microorganisms nyob rau hauv tej yam ntuj tso tej yam kev mob los yog nyob rau hauv tej yam kev mob, nws thiaj li hloov mus rau carbon dioxide thiab dej, thiaj li yuav txo tau ib puag ncig muaj kuab paug.
Biocompatibility
Polylactic acid (PLA) tuaj yeem maj mam degraded nyob rau hauv tib neeg lub cev los ntawm hydrolysis, thiab cov lactic acid monomers tsim koom nyob rau hauv lub cev metabolism, nws thiaj li tsim carbon dioxide thiab dej thiab raug tawm los ntawm lub cev.
Kev ua tau zoo
Polylactic acid (PLA) tuaj yeem tsim los ntawm ntau txoj hauv kev xws li kev txhaj tshuaj molding, tshuab zaj duab xis, thiab extrusion. Kev ua haujlwm kub yog nruab nrab thiab nws yooj yim rau kev khiav lag luam.
Customizability: Los ntawm kev hloov kho, xws li ntxiv plasticizers, fillers, thiab reinforcing agents, kev ua tau zoo ntawm polylactic acid (PLA) tuaj yeem hloov kho kom tau raws li cov kev thov sib txawv.
Thermal stability: Lub melting point ntawm polylactic acid (PLA) yog feem ntau ntawm 155 thiab 185 degree, thiab nws pom zoo thermal stability nyob rau hauv ib tug tej yam kub kub.
Barrier kev ua tau zoo
Polylactic acid (PLA) muaj qee yam teeb meem tiv thaiv qee yam roj, xws li oxygen thiab carbon dioxide.
