Dab tsi yog qhov txawv ntawm pla thiab PHA cov ntaub ntawv degradable?

Polylactic acid (PLA) thiab polyhydroxyalkanoate (PHA) yog ob qho khoom siv biodegradable, txhua tus muaj cov yam ntxwv sib txawv thiab kev siv.

1. Polylactic acid (PLA):

(1) Polylactic acid yog tsim los ntawm cov hmoov txhuv nplej siab uas tau thov los ntawm cov khoom siv cog qoob loo (xws li pob kws), uas muaj biodegradability zoo, thiab tuaj yeem degraded los ntawm cov kab mob hauv qhov xwm txheej tom qab siv, thiab thaum kawg tsim cov pa roj carbon dioxide thiab dej.

(2) Nws muaj qhov zoo thermal stability thiab hnyav tsis kam, thiab kev ua haujlwm kub yog nyob nruab nrab ntawm 170 ~ 230 degree, uas yog tsim rau ntau yam kev ua xws li extrusion, spinning, biaxial stretching thiab txhaj tshuaj molding.

(3) Lub cev muaj zog ntawm polylactic acid suav nrog qhov ceev ntawm 1. }%, thiab lwm yam.

(4) Polylactic acid kuj tau siv dav hauv kev kho mob, xws li cov khoom siv pov tseg, tsis siv tshuaj tua kab mob, thiab lwm yam.

 

2. Polyhydroxyalkanoates (PHAs):

(1) PHA yog cov khoom siv ntuj tsim los ntawm cov kab mob microorganisms, uas tuaj yeem biodegraded nyob rau hauv aerobic thiab anaerobic tej yam kev mob.

(2) PHA muaj cov khoom zoo sib xws ntawm lub cev thiab cov khoom siv thiab cov khoom siv ntawm cov yas, thiab cov kab mob tuaj yeem siv tau hauv kev lag luam los tsim cov khoom siv polymer no thiab hloov cov khoom siv niaj hnub.

(3) PHA muaj ntau hom kev degradation, thiab tuaj yeem degraded hauv av, dej hauv pas dej, dej hiav txwv, thiab txawm dej phwj tuaj thiab sludge.

(4) PHA muaj ntau qhov kev thov, nrog ntau dua 150 qhov sib txawv ntawm cov qauv lossis cov monomers, thiab tuaj yeem ua tiav lub cev zoo thiab cov khoom siv kho tshuab los ntawm kev sib xyaw nrog PHA thiab lwm yam khoom siv degradable nrog cov qauv sib txawv.

Qhov sib txawv tseem ceeb ntawm ob cov ntaub ntawv yog lawv cov keeb kwm, biodegradability, lub cev muaj zog, thiab thaj chaw ntawm daim ntawv thov. PLA feem ntau yog muab los ntawm cov chaw cog qoob loo, thaum PHA yog lub ntuj tsim polymer tsim los ntawm cov kab mob. PLA muaj qhov zoo thermal stability thiab hnyav tsis kam, thiab haum rau ntau yam kev ua haujlwm; Vim nws muaj ntau haiv neeg thiab ntau yam kev degradation, PHA muaj peev xwm siv tau ntau dua nyob rau hauv ib puag ncig sib txawv. Nrog rau kev txhim kho thev naus laus zis thiab kev loj hlob ntawm kev lag luam kev xav tau, ob qho tib si cov ntaub ntawv tseem niaj hnub txhim kho thiab nthuav lawv cov ntawv thov.

 

PLA (polylactic acid) thiab PHA (polyhydroxyalkanoate) yog ob qho tib si biodegradable cov ntaub ntawv uas tuaj yeem siv los ua ntau hom hnab los txo lawv cov kev cuam tshuam ib puag ncig.

 

1.PLA hnab:

(1) PLA yog bioplastic ua los ntawm cov khoom siv txuas ntxiv (xws li pob kws) thiab muaj biodegradability zoo. PLA hnab suav nrog cov hnab ntim khoom uas tsis tuaj yeem degradable, lub hnab ntim khoom, thiab lwm yam, uas tuaj yeem ua rau decomposed nyob rau hauv tej yam kev mob los txo cov pa phem ib puag ncig.

(2) PLA hnab yog tus yam ntxwv los ntawm siab pob tshab, zoo gloss, thiab lub cev muaj zog zoo ib yam li cov yas yas, tab sis ntau tus phooj ywg ib puag ncig.

 

2.PHA hnab:

(1) PHA yog ib yam tshiab ntawm biomaterial synthesized los ntawm cov kab mob uas yog degradable, biodegradable, biocompatible thiab environmentally friendly. PHA hnab tuaj yeem ua tiav biodegradable hauv dej hiav txwv lossis av, thiab lub voj voog degradation qis dua li cov yas zoo tib yam.

(2) Vim qhov softness thiab elasticity ntawm PHA, nws tuaj yeem siv los ua cov khoom sib txawv xws li cov hnab yas thiab cov khoom ntim khoom kom tau raws li cov kev xav tau ntawm cov neeg siv khoom hauv lawv lub neej txhua hnub.

(3) PHA hnab kuj muaj cov cua kub zoo, toughness thiab siab bio-based cov ntsiab lus, uas tuaj yeem siv dav hauv lub neej txhua hnub, xws li cov khw muag khoom noj khoom haus, hnab ntim khoom noj, thiab lwm yam.

 

Lub hnab ua los ntawm ob qho khoom siv yog cov kev xaiv hauv eco-phooj ywg, tab sis PHA hnab tau suav tias yog ib qho ntawm cov khoom zoo tshaj plaws biodegradable vim lawv cov biodegradability nyob rau hauv ib puag ncig dav. Nrog rau kev txhim kho thev naus laus zis thiab kev xav tau ntawm kev ua lag luam, kev siv cov khoom siv degradable no yuav ua kom dav dua.