Cov khoom siv biodegradable ua rau lub ntiaj teb yeej pom kev
GG quot; Lub ntiaj teb tau los ua kaj thiab zoo nkauj. Nws zoo li tus txawj ua yees siv, tuaj yeem txaus siab txhua qhov kev cia siab thiab thov." Xyoo 1941, ob tus kws tshawb fawb Askiv xav txog qhov" ntiaj teb yav tom ntej puag ncig los ntawm cov khoom lag luam yas muaj yeeb yuj" nyob rau hauv lus paj huam." ;. Tam sim no, yas tau hloov peb lub neej kiag li. Nws cuam tshuam los ntawm ntim khoom noj, khoom siv niaj hnub, ris tsho hnav thiab khoom ntxiv, thiab txawm tias cov tshuaj niaj hnub. Tab sis tib neeg tau maj mam paub tias txawm hais tias yas siv tau yooj yim rau tib neeg lub neej, nws tseem coj qhov tsaus ntuj rau peb lub neej. Cov khoom ntawm" kev ua paug dawb" nthwv dej thiab teev saum pas dej, dej hiav txwv thiab av." Nws pom tias tsis muaj kev cuam tshuam ntawm kev txo qis. Hauv xyoo 2002, lub hnab yas siv feem ntau tau raug xaiv los ua" kev tsim ua phem tshaj plaws ntawm noob neej" los ntawm British" Tus Saib Xyuas" ;.
Raws li txoj hauv kev zoo tshaj los daws" cov pa phem dawb", cov khoom siv biodegradable tau maj pom cov neeg nyiam ntawm ib puag ncig cov kws tshaj lij, cov ntaub ntawv kws tshawb fawb thiab cov neeg hauv ntau daim teb. Cov khoom siv biodegradable xa mus rau cov ntaub ntawv polymer uas tuaj yeem ua tshuaj lom neeg, kev siv roj ntsha lossis lub cev ua kom lub ntsej muag los yog ua kom tsis haum nyob rau hauv kev ua ntawm cov kab mob me me uas muaj nyob hauv cov xwm txheej xws li cov kab mob, fungi, thiab algae. Cov khoom siv biodegradable tuaj yeem muab faib ua cov khoom siv polymer biodegradable, cov ntaub ntawv biodegradable synthesized los ntawm cov kab mob me me, thiab cov khoom siv degradable synthesized los ntawm tib neeg. Ntuj cov ntaub ntawv degradable yog cov chav kawm ntawm macromolecules muab rho tawm los ntawm lub cev lossis tau ncaj qha los ntawm cov khoom puag ncig ntuj. Lawv muaj cov biocompatibility zoo tab sis cov khoom siv tsis zoo rau lub cev, suav nrog cov protein ntuj, polysaccharides thiab lawv cov neeg siv thiab qee cov khoom siv biosynthesis Polyester, xws li collagen, hmoov txhuv nplej siab, dextran, cellulose, thiab lwm yam. , polyhydroxybutyrate, thiab lwm yam Feem ntau cov khoom siv biodegradable yog aliphatic polyesters nrog ester pawg qhia rau hauv qauv qauv, xws li polylactic acid (PLA), polybutylene succinate (PBS), polycaprolactone (PCL), thiab lwm yam.
Tam sim no, cov hmoov txhuv nplej siab kua mis yog cov khoom siv tshaj plaws hauv peb lub neej. Piv txwv, nws tau siv rau hauv qee qhov siv pov tseg. Nws feem ntau yog siv cov hmoov txhuv nplej siab, cellulose thiab lignin hauv cov nroj tsuag, thiab chitosan, aminodextran, tsiaj cov kua nplaum hauv cov tsiaj, thiab algae los ntawm cov tsiaj txhu hauv marine los npaj cov khoom siv biodegradable. Piv txwv li, siv cov pob kws thiab hmoov txhuv nplej los ua cov hmoov txhuv nplej siab tuaj yeem tiv thaiv cov cuab yeej hav zoov ntau los ntawm pob zeb poob, uas muaj peev xwm ua lag luam zoo thiab kev sib tw.
Polylactic acid (PLA) yog lwm cov khoom siv feem ntau khoom siv biodegradable. Tej zaum koj yuav tsis tau hnov txog polylactic acid, tab sis koj yuav tsum paub lactic acid. Txhua tus tau hnov cov kev mob siab rau lub cev tom qab ua kev tawm dag zog. Polylactic acid yog cov polymer tsim los ntawm lub cev qhuav dej thiab polymerization ntawm hydroxyl thiab carboxyl pawg hauv lactic acid. Polylactic acid tsis muaj kuab paug nyob rau tag nrho cov txheej txheem ntau lawm, nws cov kev ua haujlwm zoo ib yam li ntau yam hauv plastics engineering, thiab nws muaj kev sib raug zoo nrog cov muaj sia. Yog li, PLA tsis yog tsuas yog siv dav hauv kev ntim, kev lag luam tsheb (qhov rooj, rims, rooj zaum tsheb, thiab lwm yam), kev lag luam hluav taws xob (CDs, lub xov tooj ntawm tes, thiab lwm yam), nws kuj tuaj yeem ua rau cov tawv nqaij cuav, tsis yog- tshem tau phais mob sutures, thiab tshuaj kho mob Cov neeg sawv cev ntim khoom, cov khoom tawg yooj yim sab hauv kho cov ntaub ntawv, thiab lwm yam.
Polyhydroxyalkanoate (PHA) -this yuav tsum yog lo lus tshiab rau txhua tus neeg. PHA yog polyester sab hauv tsim los ntawm microorganisms, thiab nws yog lub ntuj ua tshuaj polymer biomaterial. PHA tuaj yeem ua lub zog zoo li engineering plastics lossis mos li roj hmab, thiab nws muaj ntau yam muaj zog ua rau nws siv dav. Xyoo tsis ntev los no, nws tau maj mam dhau los ua kev tshawb fawb hotspot hauv cov khoom siv roj ntsha thiab cov ntaub ntawv tsis zoo. Polybutylene succinate (PBS) yog lwm hom kev poob deg uas nkag mus rau qhov kev tshawb fawb ntawm cov khoom siv hauv xyoo 1990s. Piv nrog tshuaj tawg yooj yim xws li PHA thiab PCL, PBS muaj cov yam ntxwv ntawm tus nqi qis thiab cov yam ntxwv zoo hauv tshuab. Hauv cov teb ntawm cov hnab khib nyiab, ntim hnab, hnab ntim cov tshuaj pleev ib ce, tshuaj yeeb tshuaj maj mam tso tawm, thiab cov khoom siv tshuaj biomedical polymer. Ntxiv rau, nyob rau xyoo 2004, kuv lub teb chaws tau ua tus thawj coj hauv kev txhim kho cov pa roj carbon dioxide polymer degradable cov khoom siv siv hydrocarbons thiab carbon dioxide pa. Cov tsos ntawm cov khoom yog zoo heev rau polyethylene plastics. Nws tuaj yeem ua rau xeb nyob rau hauv cov av hauv ib lub sijhawm luv luv thiab cuam tshuam ncaj qha los ntawm cov nroj tsuag.
Lub sijhawm tam sim thaum kev tiv thaiv ib puag ncig kev hu tau nce, cov khoom siv biodegradable muaj kev txhim kho zoo thiab muaj kev siv ntau yam, xws li kev ntim khoom, fiber ntau, kev ua liaj ua teb, txhaj tshuaj molding, thiab kev siv kho mob. Raws li kev txheeb cais uas muaj tam sim no, kwv yees tias thaum xyoo 2020, tag nrho thoob ntiaj teb xav tau cov khoom siv biodegradable yuav txog kwv yees li 3.22 lab tons, nrog tus nqi nruab nrab txhua xyoo nce dua 16%. Txoj kev loj hlob sai ntawm kev thov xav tau hais tias kev lag luam khoom siv biodegradable yog qhia txog kev hloov ntawm kev hloov thiab kev nrawm, thiab lub zeem muag tau tsim nyog saib rau yav tom ntej.
Peb muab patented puv biodegradable zaj duab xis thiab lub hnab PVA, tag nrho cov khoom yog tsim los ntawm cov cuab yeej siv casting, Nws txawv ntawm cov tshuab moulding khoom, tag nrho cov tshuab moulding khoom tsis puv biodegradable. Peb tuaj yeem tsim pva zaj duab xis thiab hnab hauv pob tshab thiab pob tshab xim. thiab PVA zaj duab xis yog du ntau dua li cov tsoos tshuab moulding khoom.
Peb kuj muab cov khoom siv organic puv ntim biodegradable zaj duab xis thiab lub hnab nrog daim ntawv patented raw khoom thiab cov txheej txheem.
Yog xav paub ntxiv PVA zaj duab xis thiab hnab khoom thov mus saib peb:
http://www.joyful-printing.net/pva-bag/
http://www.joyful-printing.com/pva-bag/