Okwu mmalite nke PLA

Banyere PLA

PLA, makwaara dị ka polylactide, bụ polyester polymerized sitere na lactic acid.Polylactic acid nwere ezigbo biodegradability, ndakọrịta na absorption.Ọ bụ ihe na-adịghị egbu egbu, ihe na-adịghị na-akpasu iwe.Akụrụngwa ya bụ lactic acid, nke a na-enwetakarị site na gbaa ụka nke starch, dị ka ọka na osikapa.Enwere ike nweta ya site na cellulose, ihe mkpofu kichin ma ọ bụ mkpofu azụ.

PLA nwere ụdị akụrụngwa dị iche iche, na ngwaahịa ndị sitere na ya nwere ike ịgbakọ ozugbo ma ọ bụ gbaa ọkụ, nke nwere ike izute ihe achọrọ maka mmepe na-adigide.Ezi nghọta na ụfọdụ siri ike, biocompatibility na okpomọkụ nke PLA bụ isi ihe kpatara ngwa ngwa ya.

Tụkwasị na nke ahụ, PLA nwere thermoplasticity ma nwee ike itinye ya n'ọtụtụ ubi, dị ka ihe nkwakọba ihe, eriri, wdg.
E jiri ya tụnyere ngwaahịa petrochemical ọdịnala, oriri ike na mmepụta nke polylactic acid bụ naanị 20% ruo 50% nke ngwaahịa petrochemical, na carbon dioxide emepụtara bụ naanị 50% nke ngwaahịa petrochemical.Ya mere, mmepe nke polylactic acid ihe na-emebi emebi dị mkpa iji belata nsogbu gburugburu ebe obibi na ike zuru ụwa ọnụ.

Atụmatụ PLA
1. Biodegradability
E jiri ya tụnyere plastik ọdịnala, polylactic acid nwere ike imebi ya na CO2 na H2O site na microorganisms na ìhè.Ngwaahịa ndị na-emebi emebi adịghị egbu egbu na ndị na-adịghị emerụ ahụ, ha agaghị emetọkwa gburugburu ebe obibi.Ihe monomer maka imepụta polylactic acid bụ lactic acid, nke enwere ike ịgba ya site na ihe ọkụkụ dị ka ọka wit, osikapa na beet shuga ma ọ bụ ngwaahịa ndị ọrụ ugbo.Ya mere, akụrụngwa maka imepụta polylactic acid na-emegharị.A na-eji polylactic acid dị ka ihe na-emepụta ihe na-emepụta ihe na-emepụta ihe.
2. Biocompatibility na absorbability
Enwere ike iji acid ma ọ bụ enzyme mee polylactic acid iji mepụta lactic acid n'ime ahụ mmadụ.Dị ka metabolite nke mkpụrụ ndụ, lactic acid nwere ike nwetakwu metabolized site na enzymes n'ime ahụ, iji mepụta CO2 na H2O.Ya mere, polylactic acid adịghị egbu egbu na ọ dịghị emerụ ahụ mmadụ, na mgbakwunye na ọ nwere ezigbo bioacompatibility na bioabsorbability.Polylactic acid bụ nke US Food and Drug Administration kwadoro nke enwere ike iji dị ka biomaterial maka ịkụnye n'ime mmadụ.

3. N'ụzọ anụ ahụ Machinable
Dị ka ihe eji eme ihe na-ekpo ọkụ na-ekpo ọkụ, polylactic acid nwere ezigbo plasticity na nhazi nhazi anụ ahụ, nke nwere nnukwu agbaze na crysallinity, ezigbo elasticity na flexibilit, na ezigbo thermoformability.Ihe Polylactic acid, dị ka ihe polymer dị ka polypropylene (PP), polystyrene (PS), na polyphenylene ether resin (PPO), nwere ike ịhazi ya site na extrusion, ịgbatị, na ịkpụzi nsị.