Polylactic acid (PLA) yog ib hom khoom siv bio-based thiab rov ua dua tshiab, uas yog ua los ntawm cov khoom siv hmoov txhuv nplej siab uas tau tsim los ntawm cov nroj tsuag rov ua dua tshiab (xws li pob kws, cassava, thiab lwm yam). Cov khoom siv hmoov txhuv nplej siab yog saccharified kom tau txais glucose, thiab tom qab ntawd fermented los ntawm glucose thiab qee hom kom tsim cov kua qaub lactic siab, thiab tom qab ntawd siv txoj kev tshuaj synthesis los tsim cov kua qaub polylactic nrog qee qhov hnyav molecular. Nws muaj biodegradability zoo, thiab tuaj yeem raug rhuav tshem tag nrho los ntawm cov kab mob hauv qhov xwm txheej tshwj xeeb tom qab siv, thaum kawg 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 lees paub tias yog cov khoom siv zoo rau ib puag ncig.
Polylactic acid muaj kev ruaj khov zoo thermal, qhov kub ua tiav yog 170 ~ 230 ℃, thiab nws muaj kev tiv thaiv zoo rau cov kuab tshuaj. Nws tuaj yeem ua tiav ntau txoj hauv kev, xws li extrusion, spinning, biaxial stretching, thiab txhaj tshuaj molding. Ntxiv nrog rau kev biodegradable, cov khoom ua los ntawm polylactic acid muaj kev sib raug zoo biocompatibility, gloss, pob tshab, tes xis thiab tiv taus kub, nrog rau qee yam kab mob tsis kam, nplaim taws retardancy thiab UV tsis kam, yog li lawv muaj txiaj ntsig zoo heev. Siv dav ua cov ntaub ntawv ntim khoom, fibers thiab nonwovens, thiab lwm yam, tam sim no feem ntau siv rau hauv khaub ncaws (ris tsho hauv qab, khaub ncaws sab nraud), kev lag luam (kev tsim kho, kev ua liaj ua teb, hav zoov, ntawv) thiab kev kho mob thiab kev noj qab haus huv.
Lub sijhawm tshaj tawm: Cuaj hlis-19-2022
