Cov hnab ntim khoom degradable txhais tau tias lawv tuaj yeem degraded, tab sis degradation tuaj yeem muab faib ua "degradable" thiab "tag nrho degradable".
Ib nrab degradation yog hais txog qhov sib ntxiv ntawm qee yam additives (xws li cov hmoov txhuv nplej siab, hloov cov hmoov txhuv nplej siab los yog lwm yam cellulose, photosensitizers, biodegradants, thiab lwm yam) thaum lub sij hawm tsim khoom kom ruaj khov.
Tom qab ntog, nws yooj yim dua rau degrade plastics nyob rau hauv ib puag ncig ntuj.
Tag nrho cov degradation txhais tau tias tag nrho cov khoom yas degrade rau hauv dej thiab carbon dioxide. Cov khoom siv tseem ceeb ntawm cov khoom siv degradable no tau ua tiav rau hauv lactic acid (pob kws, cassava, thiab lwm yam), uas yog
PLA. Polylactic acid (PLA) yog ib yam tshiab ntawm bio-based thiab txuas ntxiv biodegradable khoom. Cov khoom siv hmoov txhuv nplej siab yog saccharified kom tau cov piam thaj, uas tom qab ntawd fermented los ntawm cov piam thaj thiab qee hom.
Nws yog hloov dua siab tshiab rau hauv high-purity lactic acid, thiab ces ib tug tej yam molecular hnyav polylactic acid yog synthesized los ntawm cov tshuaj synthesis txoj kev. Nws muaj biodegradability zoo thiab tuaj yeem siv los ntawm cov kab mob hauv lub ntiaj teb ntuj.
Nws yog degraded kiag li nyob rau hauv tej yam kev mob thiab thaum kawg tsim carbon dioxide thiab dej tsis muaj paug ib puag ncig. Qhov no muaj txiaj ntsig zoo rau kev tiv thaiv ib puag ncig thiab tau lees paub tias yog cov khoom siv zoo ib puag ncig. Tam sim no tag nrho degradable ntim hnab
Cov khoom siv bio-based tseem ceeb 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), uas tsis ua phem rau ib puag ncig.
Vim li cas ntxiv PBAT Shenzhen Jiuxinda ntawm no los qhia rau koj tias PBAT yog copolymer ntawm dicarboxylic acid, 1,4-butanediol, thiab terephthalic acid. Nws yog ib hom biodegradable tag nrho.
PBAT chemically synthesized aliphatic aromatic polymer, PBAT muaj kev yooj yim heev thiab tuaj yeem siv rau kev ua yeeb yaj kiab extrusion, tshuab tshuab, txheej txheej extrusion thiab lwm yam molding ua. PLA thiab PBAT
Lub hom phiaj ntawm kev sib xyaw yog txhawm rau txhim kho PLA qhov toughness, biodegradation thiab molding processability. PLA thiab PBAT yog qhov tsis sib xws, yog li xaiv tus neeg sib tw tsim nyog tuaj yeem ua rau kev ua haujlwm ntawm PLA tseem ceebtxhim kho.
Post lub sij hawm: Sep-03-2021