Ntau tus phooj ywg nug dab tsi yog qhov txawv ntawm cov hnab ntim tsis muaj teeb meem thiab cov ntim ntim tau zoo nkauj? Puas yog nws tib yam li lub hnab ntim khoom tsis zoo? Qhov ntawd tsis ncaj ncees lawm, muaj qhov sib txawv ntawm cov hnab ntim kev ruaj ntseg thiab cov ntim ntim tau zoo nkauj.
Cov hnab ntim khoom ruaj khov, qhov cuam tshuam yog tias lawv tuaj yeem ua rau cov hnab ntim khoom, tab sis cov neeg ruaj ntseg ntim tau muab faib ua "tsis zoo" thiab "zoo nkauj". Qhov txawv yog dab tsi? Txuas ntxiv nyeem cov kev paub me los ntawm Anrui.
Cov hnab ntim khoom ruaj ntseg xa qee qhov ntau ntawm cov khoom sib ntxiv (xws li cov hmoov txhuv nplej siab, hloov kho cov duab starch, cov duab, thiab lwm yam) degradable hnab yas.
Txhua lub hnab ntim khoom ruaj ntseg txhais tau tias lub hnab ntim khoom yas ua kom tiav rau hauv dej thiab cov pa roj carbon dioxide. Lub hauv paus tseem ceeb ntawm cov khoom siv no tag nrho yog cov txheej txheem ntawm pob kws, Cassaginga, thiab lwm yam rau hauv lactic acid, uas yog pla. Polylactic acid (PLA) yog hom tshiab ntawm biological substrate thiab txuas ntxiv cov ntaub ntawv biupradable. Cov hmoov txhuv nplej siab yog cov khoom siv saccose yog kom tau txais cov piam thaj thiab qee yam kev ua kom muaj kuab zoo los tsim cov tshuaj tua hluavtaws siab. Molecular qhov hnyav polylactic acid. Nws muaj zoo biodegrentability, thiab tuaj yeem ua kom tiav los ntawm cov kab mob me me tom qab siv, uas tsis muaj kuab paug, uas tsis muaj cov khoom siv ib puag ncig rau cov neeg ua haujlwm. Tam sim no, cov khoom siv xyoob xyoob ntoo roj hmab ntawm cov khoom ntim hluav taws xob tag nrho yog tsim cov txheej txheem ntawm cov dej thiab cov pa roj carbon dogred (60-70 degrees rau ib puag ncig.
Vim li cas PBat yuav ntxiv? Anrui ntsuas cov tshuaj kws ua choj tau pab tus editor mus los txhais lus. PBAT yog copolymer ntawm adipic acid, 1,4-butanediol thiab terephthalic acid. Nws yog tshuaj synthesis uas tuaj yeem yog cov bioterraded tag nrho. Lub aliphatic-aromatic polymer ntawm PBAT tau yooj yim heev thiab tuaj yeem siv rau zaj duab xis extrusion, extrusion txheej thiab lwm cov txheej txheem moulding. Lub hom phiaj ntawm kev sib xyaw PLA thiab PBAT yog txhawm rau txhim kho kev sib zog, biodegradation thiab moulding txheej txheem ntawm PLA. PLA thiab PBat yog tsis sib xws, yog li xaiv ib qho tsim nyog compatibilizer muaj peev xwm txhim kho kev ua tau zoo ntawm PLA.
Saib ntawm no kom nkag siab qhov txawv ntawm cov hnab ntim kev ruaj khov thiab cov ntim ntim puv nkaus.
Cov hnab ntim khoom ruaj khov, qhov cuam tshuam yog tias lawv tuaj yeem ua rau cov hnab ntim khoom, tab sis cov neeg ruaj ntseg ntim tau muab faib ua "tsis zoo" thiab "zoo nkauj". Cov hnab ntim khoom ruaj ntseg xa qee qhov ntau ntawm cov khoom sib ntxiv (xws li cov hmoov txhuv nplej siab, hloov kho cov duab starch, cov duab, thiab lwm yam) degradable hnab yas. Txhua lub hnab ntim khoom ruaj ntseg txhais tau tias lub hnab ntim khoom yas ua kom tiav rau hauv dej thiab cov pa roj carbon dioxide. Lub hauv paus tseem ceeb ntawm cov khoom siv no tag nrho yog cov txheej txheem ntawm pob kws, Cassaginga, thiab lwm yam rau hauv lactic acid, uas yog pla.
Polylactic acid (PLA) yog hom tshiab ntawm biological substrate thiab txuas ntxiv cov ntaub ntawv biupradable. Cov hmoov txhuv nplej siab yog cov khoom siv saccose yog kom tau txais cov piam thaj thiab qee yam kev ua kom muaj kuab zoo los tsim cov tshuaj tua hluavtaws siab. Molecular qhov hnyav polylactic acid. Nws muaj zoo biodegrentability, thiab tuaj yeem ua kom tiav los ntawm cov kab mob me me tom qab siv, uas tsis muaj kuab paug, uas tsis muaj cov khoom siv ib puag ncig rau cov neeg ua haujlwm.
Tam sim no, cov khoom siv xyoob xyoob ntoo roj hmab ntawm cov khoom ntim hluav taws xob tag nrho yog tsim cov txheej txheem ntawm cov dej thiab cov pa roj carbon dogred (60-70 degrees rau ib puag ncig. Vim li cas PBat yuav ntxiv? Kev Tsim Kho Cov Khoom Siv Cov Khoom Siv Yooj Yim los piav qhia tias PBat yog copolic acid, 1,4-butanourized rog uas tuaj yeem yog cov khoom siv roj biodegradable tag nrho. Cov ntxhiab tsw ntxhiab-cov ntxhiab tsw qab, pbat tau yooj yim heev thiab tuaj yeem siv rau zaj duab xis extrusion, extrusion txheej thiab lwm cov txheej txheem moulding. Lub hom phiaj ntawm kev sib xyaw PLA thiab PBAT yog txhawm rau txhim kho kev sib zog, biodegradation thiab moulding txheej txheem ntawm PLA. PLA thiab PBat yog tsis sib xws, yog li xaiv ib qho tsim nyog compatibilizer muaj peev xwm txhim kho kev ua tau zoo ntawm PLA.
Lub Sijhawm Post: Feb-28-2022