High-temperature polystrackic acid (PLA) yog ib qho ntawm cov plastics degradable ntau dua degradable rau kev tshawb fawb thiab kev siv.Nws cov ntaub ntawv raw yog los ntawm cov nroj tsuag txuas dua tshiab, pob kws, ua liaj ua teb los ntawm cov khoom, thiab lwm yam, uas muaj biodegradability zoo.PLA muaj cov khoom siv zoo heev thiab zoo ib yam li cov yas polypropylene.Nws tuaj yeem hloov PP thiab PET yas hauv qee qhov chaw.Nyob rau tib lub sijhawm, nws muaj gloss zoo, pob tshab, hnov, thiab qee yam bacteriostatic.
1. Cov xwm txheej ntau lawm ntawm high-temperature polystraphin PLA
Tam sim no, muaj ob hom PLA txoj kev sib txuas.Ib qho yog txoj kev sib sau ncaj qha.Cov lactic acid yog hais txog dewater thiab ntsws ntawm qhov kub thiab txias.Cov txheej txheem ntau lawm yog qhov yooj yim thiab tus nqi qis, tab sis cov khoom lag luam molecular zoo tsis sib xws thiab cov txiaj ntsig ntawm daim ntawv thov tsis zoo.Lwm qhov yog tias propylecly polymerization ntawm Cyrne yog kev cai lij choj, uas yog tam sim no txoj kev tsim khoom tseem ceeb.Cov txheej txheem tshwj xeeb yog raws li hauv qab no.
PLA yog kev cai lij choj, nrog kev ua haujlwm siab, cov khoom zoo, thiab tus nqi siab.
2. Degradability ntawm high-temperature polystraphin PLA
PLA yog ruaj khov nyob rau hauv chav tsev kub, tab sis nws yog ib qho yooj yim mus degrade CO2 sai sai thiab dej nyob rau hauv ib tug me ntsis kub ib puag ncig, acid rau lub ministry nplhaib khob, thiab microbial ib puag ncig.Yog li ntawd, cov khoom siv PLA tuaj yeem siv rau kev siv ib puag ncig thiab cov khoom ntim kom nyab xeeb thaum lub sijhawm siv tau, thiab nws tuaj yeem degraded ib lub sijhawm tom qab tso tseg.
Cov yam ntxwv uas cuam tshuam rau PLA degradation muaj xws li molecular zoo, crystalline xeev, micro qauv, ib puag ncig kub thiab av noo, pH nqi, lub teeb lub sij hawm thiab ib puag ncig microorganisms.
PLA thiab lwm yam khoom siv sib xyaw nrog lwm cov ntaub ntawv uas tuaj yeem cuam tshuam qhov nrawm nrawm.Piv txwv li, PLA ntxiv ib qho ntawm cov hmoov ntoo los yog pob kws straw thiab fiber ntau kom ceev cov degradation npaum li cas.
3. tiv taus kub polystrackic acid PLA
Kev thaiv yog hais txog lub peev xwm los tiv thaiv cov pa roj thiab dej los ntawm cov khoom siv.Kev faib cov khoom thaiv cov ntaub ntawv tseem ceeb heev rau cov khoom ntim.Tam sim no, feem ntau cov hnab yas txiav ntawm lub khw yog Plapbat cov khoom sib xyaw.Qhov tsis kam ntawm PLA zaj duab xis tuaj yeem nthuav dav daim ntawv thov teb.
Cov yam ntxwv uas cuam tshuam rau PLA blockage feem ntau suav nrog lawv tus kheej yam tseem ceeb (cov qauv molecular thiab crystalline xeev) thiab lwm yam (kub, av noo, sab nraud quab yuam).
1. Cov cua kub ntawm PLA zaj duab xis yuav txo tau nws cov blockage, yog li PLA tsis haum rau ntim khoom noj raws li cov khoom noj uas yuav tsum tau ua kom sov.
2 PLA stretching nyob rau hauv ib tug tej yam ntau yam yuav ua rau kom muaj zog.Thaum qhov sib piv tensile nce ntawm 1 mus rau 6.5, lub crystallization ntawm PLA tau zoo heev, yog li qhov kev cuam tshuam zoo tuaj.
3. Ntxiv qee qhov thaiv (xws li av nplaum thiab fiber ntau) rau PLA substrate tuaj yeem txhim kho qhov thaiv ntawm PLA.Qhov no yog vim thaiv txoj kev khoov ntawm cov dej los yog roj nkag ntawm cov khoom me me.
4. Pailoring kev kho mob rau saum npoo ntawm PLA zaj duab xis tuaj yeem txhim kho kev tiv thaiv.
4. PLA lub tshuab ua haujlwm
PLA muaj lub zog zoo.Cov khoom siv kho tshuab zoo ib yam li PP, tab sis qhov tsis muaj toughness yog yooj yim rau khoov thiab deform, thiab nws feem ntau yuav tsum tau toughened thiab hloov.Txhawm rau kom ntseeg tau tias biodegradability ntawm PLA, PLA thiab lwm yam kev ua haujlwm yas feem ntau yog tov nrog biodegradable resin.PBAT, PBS, PCL, roj hmab ntuj thiab lwm yam khoom tuaj yeem txhim kho PLA toughness.
5. PLA kev ua haujlwm kho qhov muag
PLA muaj qhov tsis tshua muaj pob tshab thiab gloss ntawm lwm cov yas degradable, uas yog sib npaug rau iav ntawv thiab PET, tshwj xeeb tshaj yog tsim rau kev siv (pom zoo ntim, zoo kho kom zoo nkauj nyhuv. yuav tsum tau muab sau tseg tias lwm yam nyob rau hauv lwm yam yog nyob rau hauv lwm yam, tsis txhob txo nws zoo transparency ntau npaum li sai tau kom nws cov ntim pom kev thiab kho kom zoo nkauj nyhuv.
PLA pob tshab lub thawv
6. PLA kev ua haujlwm thermal
Lub thermal stability ntawm PLA cov ntaub ntawv yog sib npaug rau PVC, tab sis qis dua PP, PE thiab PS.Kev ua haujlwm kub yog feem ntau tswj ntawm 170 ~ 230 ° C. Nws yog tsim rau kev txhaj tshuaj, ncab, extrusion, tshuab, 3D ntaus, thiab lwm yam.
PLA khoom plig
Hauv kev ua tiav tiag tiag, PLA crystallization tus nqi qeeb thiab feem ntau yuav tsum tau hloov kho.Vim qhov qeeb thiab qis crystallization tus nqi, qhov kub thiab txias deformation ntawm PLA yog tsawg, uas txwv nws daim ntawv thov ntawm cov khoom ntim ntawm cov khoom cua sov-filled lossis thermal sterilization.
Txhawm rau txhim kho PIA siv lead ua tus nqi thiab crystallinity, PLA's optical purity tuaj yeem txhim kho ntau li ntau tau thaum lub sijhawm tsim khoom.Kev kho mob Antuction kuj yog ib txoj hauv kev los txhim kho PA crystallinity.Tsis tas li ntawd, nws tuaj yeem muab ntxiv nrog cov neeg ua haujlwm nuclear los txhim kho tus cwj pwm crystallization, txhim kho nws cov crystallinity, yog li txhim kho thermal deformation kub, thiab txhim kho nws cov cua sov.
Kub kub 3D luam ntawv PLA
7. PLA cov tshuaj tua kab mob ua haujlwm
PLA tuaj yeem tsim qhov tsis muaj zog acidic ntawm qhov chaw ntawm cov khoom, uas muaj cov teebmeem ntawm bacteriostatic thiab mildew.Yog tias tus neeg sawv cev tiv thaiv kab mob tau siv kom ncav cuag ntau dua 90% ntawm cov kab mob tua kab mob, nws tuaj yeem siv rau kev ntim tshuaj tua kab mob ntawm cov khoom.
PLA cardiovascular stent, antibacterial PLA feem ntau siv hauv kev kho mob
Feem ntau siv inorganic antibacterial agents yog nyiaj, tooj liab, zinc thiab lwm yam hlau.Cov kab mob feem ntau siv cov kab mob Hango muaj xws li vanadal lossis ethyl vanadal formation compounds.Kev nyab xeeb zaub mov ntawm lwm cov tshuaj tua kab mob yuav tsum tau kawm.Feem ntau cov organic Cov tshuaj tua kab mob tsis zoo thiab lub sijhawm siv tau yog luv.
8. PLA qhov hluav taws xob ua haujlwm
PLA tuaj yeem npaj cov khoom siv hluav taws xob xws li carbon dub (CB), carbon nanotubes (CNTS), carbon fiber (CFS), lossis pob zeb ringne.Conductive polymer composite cov ntaub ntawv yog dav siv nyob rau hauv anti-static yas, electromagnetic shielding cov ntaub ntawv, nws tus kheej-tswj kub kub-thermal ntaub ntawv, zoo kub coefficient cov ntaub ntawv, thiab ib puag ncig rhiab khoom.
CPCS, uas yog raws li PLA, kuj muaj degradation thiab biocompatibility.Nws tuaj yeem siv rau kev ntim khoom tshwj xeeb los tiv thaiv zoo li qub, cov khoom siv hluav taws xob tiv thaiv hluav taws xob, thiab kev ntim khoom ntse.Piv txwv li, PLA puag conductive polymer tuaj yeem siv rau cov pa roj lossis kua sensors txhawm rau txheeb xyuas cov ntaub ntawv zoo ntawm cov zaub mov.
Post lub sij hawm: Oct-08-2022