Polylactic acid (PLA)bụ akwụkwọ akụkọ ihe mere eme bio dabere na ihe mmeghari mmeghari nke sitere na akụrụngwa starch sitere na akụrụngwa osisi enwere ike imeghari dịka ọka na akpu.
A na-edobe ngwa nri starch iji nweta glucose, bụ nke a na-eji ụdị ụfọdụ sie nri iji mepụta lactic acid dị ọcha. A na-ejizi kemịkalụ arụ ọrụ nke ọma n'ụdị eriri ọka PLA ọka na-abụghị nke a kpara akpa iji mepụta otu ịdị arọ molekul nke polylactic acid. Ọ nwere ezigbo biodegradability. Mgbe ejiri ya, n'okpuru ọnọdụ ụfọdụ, ọ nwere ike imebi ya kpamkpam site na microorganisms na okike, na-emepụta carbon dioxide na mmiri na-enweghị imetọ gburugburu ebe obibi. Nke a bara ezigbo uru maka ichekwa gburugburu ebe obibi.PLA akwa anaghị kpara akpaa na-ewere dị ka ihe na-emetụta gburugburu ebe obibi.
A na-eme eriri polylactic acid site na ngwaahịa ugbo starchy dị ka ọka, ọka wit, na beets sugar, bụ nke a na-agbakọta iji mepụta lactic acid, wee gbazee ma gbazee site n'ịtụgharị. Polylactic acid fiber bụ eriri sịntetik nke enwere ike ịkụ ma dị mfe itolite. Enwere ike imebi ihe mkpofu na okike.
arụmọrụ nwere ike imebi.
Polylactic acid fiber akụrụngwa dị ukwuu ma na-emegharị ya. Fibre polylactic acid nwere ezigbo biodegradability na enwere ike ree kpamkpam n'ime carbon dioxide na H2O na okike mgbe a tụfuru ya. Ha abụọ nwere ike ịghọ akụrụngwa maka stachi lactic acid site na photosynthesis. Mgbe afọ 2-3 gachara n'ime ala, ike nke eriri PLA ga-apụ n'anya. Ọ bụrụ na e liri ya na ihe mkpofu organic ndị ọzọ, ọ ga-erepịa n'ime ọnwa ole na ole. Na mgbakwunye, polylactic acid na-abanye n'ime lactic acid site na acid ma ọ bụ enzymes n'ime ahụ mmadụ. Lactic acid bụ ngwaahịa metabolic nke mkpụrụ ndụ ma nwee ike imeziwanye ya site na enzymes iji mepụta carbon dioxide na mmiri. Ya mere, eriri polylactic acid nwekwara ezigbo biocompatibility.
arụmọrụ absorption nke mmiri
Fibre PLA nwere ezigbo mmịnye mmiri na nrụgharị, dị ka mmebi. Arụmọrụ absorption nke mmiri na-emetụtakwa morphology na nhazi nke eriri. Ogologo ogologo nke eriri PLA nwere ntụpọ na-adịghị agbanwe agbanwe na ọnyá na-akwụsị, pores ma ọ bụ cracks, nke nwere ike ịmepụta mmetụta capillary n'ụzọ dị mfe ma gosipụta ezigbo absorption, moisturizing na mmiri mgbasa.
Ọrụ ndị ọzọ
Ọ nwere obere flammability na ụfọdụ ire retardancy; Ọrụ ịcha akwa dị njọ karịa eriri textile nkịtị, ọ naghị eguzogide acid na alkali, ọ dịkwa mfe iji hydrolyze. N'oge usoro agba agba, a ga-akwụ ụgwọ nlebara anya pụrụ iche na mmetụta nke acidity na alkalinity; Nkwenye siri ike na radieshon ultraviolet, mana ọ na-enwekarị ike iwepụ foto; Mgbe awa 500 nke mkpughe n'èzí gasịrị, ike nke eriri PLA nwere ike idowe ya na gburugburu 55% ma nwee ezigbo nguzogide ihu igwe.
Ngwa maka mmepụta nke polylactic acid fiber (PLA) bụ lactic acid, nke sitere na starch ọka, n'ihi ya, a na-akpọkwa ụdị eriri ọka ọka. Enwere ike ime ya site na ịgbakọ beets shuga ma ọ bụ ọka nwere glucose iji belata ọnụ ahịa ịkwadebe polymers lactic acid. Enwere ike nweta polylactic acid dị arọ nke dị elu site na polymerization nke lactic acid cyclic dimers ma ọ bụ polymerization kpọmkwem nke lactic acid.
Ngwaahịa sitere na polylactic acid nwere ezigbo bioacompatibility, bioabsorbability, antibacterial na retardancy ire ọkụ, na PLA nwere nguzogide okpomọkụ na polymers thermoplastic na-emebi emebi.
Enwere ike imebi eriri polylactic acid ka ọ bụrụ carbon dioxide na mmiri n'ime ala ma ọ bụ mmiri mmiri. Mgbe ọkụ, ọ naghị ahapụ ikuku na-egbu egbu ma ghara ịkpata mmetọ. Ọ bụ eriri gburugburu ebe obibi na-adigide. Uwe ya na-enwe mmetụta nke ọma, nwere ezigbo drape, na-eguzogide ụzarị UV, nwere obere flammability, yana ezigbo nhazi nhazi. Ọ dabara maka ejiji dị iche iche, uwe ntụrụndụ, ngwa egwuregwu, na ngwaahịa ịdị ọcha, ma nwee atụmanya ngwa ngwa.
Oge nzipu: Mee-23-2024