Polylactic acid (PLA) yog ib yam tshiab ntawm bio-based thiab txuas ntxiv biodegradable cov ntaub ntawv, uas yog tsim los ntawm cov hmoov txhuv nplej siab raw cov ntaub ntawv los ntawm cov khoom siv cog dua tshiab (xws li pob kws, cassava, thiab lwm yam).Starch raw khoom yog saccharified kom tau qabzib, thiab ces fermented los ntawm qabzib thiab tej hom los tsim high-purity lactic acid, thiab ces tshuaj synthesis txoj kev yog siv los ua ke polylactic acid nrog ib tug tej yam hnyav molecular.Nws muaj biodegradability zoo, thiab tuaj yeem degraded tag nrho los ntawm cov kab mob hauv cov xwm txheej hauv cov xwm txheej tshwj xeeb tom qab siv, nws thiaj li tsim cov pa roj carbon dioxide thiab dej, tsis muaj kuab paug rau ib puag ncig, uas yog qhov zoo heev rau kev tiv thaiv ib puag ncig thiab raug lees paub tias yog cov khoom siv zoo ib puag ncig.
Polylactic acid muaj qhov zoo thermal stability, kev ua haujlwm kub yog 170 ~ 230 ℃, thiab nws muaj qhov hnyav hnyav.Nws tuaj yeem ua tiav ntau txoj hauv kev, xws li extrusion, spinning, biaxial stretching, thiab txhaj tshuaj molding.Ntxiv nrog rau kev ua biodegradable, cov khoom ua los ntawm polylactic acid muaj biocompatibility zoo, gloss, pob tshab, tes xav thiab kub tsis kam, nrog rau qee yam kab mob tiv thaiv, nplaim hluav taws thiab UV tsis kam, yog li lawv muaj txiaj ntsig zoo.Dav siv los ua cov ntaub ntawv ntim khoom, fibers thiab nonwovens, thiab lwm yam, tam sim no tsuas yog siv hauv cov khaub ncaws (cov ris tsho hauv qab, tsho sab nrauv), kev lag luam (kev tsim kho, kev ua liaj ua teb, hav zoov, papermaking) thiab kev kho mob thiab kev noj qab haus huv.
Post lub sij hawm: Sep-19-2022