Lub hnab ntim khoom degradable, qhov cuam tshuam yog degradable, tab sis degradable lub hnab ntim tau muab faib ua "degradable" thiab "degradable" ob. Lub hnab ntim khoom degradable yog hais txog cov txheej txheem tsim khoom ntxiv rau qee yam ntawm cov khoom ntxiv (xws li cov hmoov txhuv nplej siab, hloov cov hmoov txhuv nplej siab los yog lwm yam cellulose, photosensitizer, biodegradative agent, thiab lwm yam), kom cov khoom ruaj khov ntawm lub hnab ntim yas, thiab tom qab ntawd sib piv yooj yim dua. degrade nyob rau hauv ib puag ncig ntuj. Lub hnab ntim khoom degradable yog hais txog lub hnab ntim yas yog degraded tag nrho rau hauv dej thiab carbon dioxide. Lub hauv paus tseem ceeb ntawm cov khoom siv degradable tag nrho yog ua tiav rau hauv lactic acid, uas yog PLA, los ntawm pob kws thiab cassava.
Polylactic acid (PLA) yog ib yam tshiab ntawm cov khoom siv roj ntsha thiab cov khoom siv rov ua dua tshiab biodegradable. Glucose yog tau los ntawm cov hmoov txhuv nplej siab raw khoom los ntawm saccharification, thiab tom qab ntawd lactic acid nrog purity siab yog fermented los ntawm cov piam thaj thiab qee hom, thiab tom qab ntawd polylactic acid nrog qee qhov hnyav molecular yog tsim los ntawm cov tshuaj synthesis. Nws muaj biodegradability zoo, thiab tuaj yeem degraded los ntawm cov kab mob hauv cov kab mob hauv cov xwm txheej tshwj xeeb tom qab siv, thiab thaum kawg tsim cov pa roj carbon dioxide thiab dej. Nws tsis muaj kuab paug ib puag ncig, uas muaj txiaj ntsig zoo rau kev tiv thaiv ib puag ncig, thiab yog ib puag ncig zoo rau cov neeg ua haujlwm.
Tam sim no, cov khoom siv bio-based tseem ceeb ntawm cov hnab ntim khoom uas tau degradable yog tsim los ntawm PLA + PBAT, uas tuaj yeem decomposed tag nrho rau hauv dej thiab carbon dioxide nyob rau hauv 3-6 lub hlis nyob rau hauv cov xwm txheej ntawm composting (60-70 degrees), tsis muaj kuab paug. mus rau ib puag ncig. Vim li cas ntxiv PBAT, cov chaw tsim khoom lag luam ntawm cov khoom ntim tau yooj yim, raws li kev txhais lus qhia yog PBAT adipic acid, 1, 4 - butanediol, terephthalic acid copolymer, ntau dhau yog biodegradable hluavtaws aliphatic thiab aromatic polymers, PBAT muaj kev yooj yim heev, tuaj yeem ua cov yeeb yaj kiab extruding. , tshuab tawm ntawm kev ua, txheej thiab lwm yam kev ua haujlwm. Lub hom phiaj ntawm PLA thiab PBAT sib xyaw yog txhawm rau txhim kho toughness, biodegradation thiab molding zog ntawm PLA. PLA thiab PBAT tsis sib haum, yog li qhov kev ua tau zoo ntawm PLA tuaj yeem txhim kho tau zoo los ntawm kev xaiv cov neeg sib tw tsim nyog.
Post lub sij hawm: Lub Xya hli ntuj-14-2022