Usoro nyocha nke ihe nkiri polylactic acid a dọtara ma gbaa ọkụ abụọ

PLA nọ n'ọnọdụ a na-apụghị ịgbanwe agbanwe na ihe nkwakọ ngwaahịa akwụkwọ ndụ akwụkwọ ndụ na-emebi emebi, mba dị iche iche amụọla ihe ndị na-emepụta ihe nkiri na ụzọ mgbanwe nke PLA kemgbe mmalite narị afọ nke 20. PLA bụ plastik ọhụrụ a na-emebi emebi nke e ji lactic acid mee site na ịgbara mmiri na polymerization kemịkalụ yana starch ọka dị ka isi ihe eji emepụta ihe ọkụkụ dị n'ụwa. PLA nwere ezigbo ndakọrịta bio na biodegradability, ọtụtụ ngwaahịa e ji ya mee nwere ike imebi kpamkpam n'ala, ngwaahịa ikpeazụ ya bụ mmiri na carbon dioxide. Anyị nwere PLA eriri extrusion mpempe akwụkwọ, nke nwere ike iwepụ PLA ozugbo..Na mgbakwunye naAhịrị extrusion mpempe akwụkwọ PLA, anyị nwekwaraAhịrị ogwe plastik PVC.

Nkwadebe nke ihe nkiri polylactic acid

Enwere ike ime ihe nkiri PLA emezigharịrị ka ọ bụrụ ihe nkiri PLA nke na-emezu ihe achọrọ maka mmepụta site na usoro ịkpụzi ihe nkiri plastik dịka ihe nkedo, ịkpụzi ihe mkpuchi extrusion, ịgbatị biaxial na calendering. E nwere ụzọ abụọ bụ isi esi akwadebe ihe nkiri PLA n'ahịa: otu bụ ịgbatị biaxial (Qingdao InnoPack) na nke ọzọ bụ ịkpụzi ihe mkpuchi (Shandong Starck).

Ihe nkiri gbatịa ụzọ abụọ nwere ọtụtụ uru dị iche iche, dịka nrụgide, ike mmetụta na ịgbagọ agbagọ na-abawanye nke ukwuu, iguzogide ihu igwe fim ahụ na-akawanye mma ma e jiri ya tụnyere ihe nkiri nkịtị, ihe na-egbuke egbuke na nghọta dị elu ka mma nke ukwuu; na mgbakwunye, mgbe agbatị abụọ gasịrị, kristal nke ihe nkiri ahụ na-abawanye, obosara ya na-abawanye, ọkpụrụkpụ ya na-ebelata, ọnụego ojiji nke ihe ahụ na-abawanye. Site na ịkpụzi ihe, ọkpụrụkpụ nke ihe nkiri ahụ nwere ike ịcha obere, yana mgbanwe ka mma, nke dị mma maka ime ụdị akpa ihe nkiri dị iche iche.
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A na-eji ihe nkiri PLA eme ihe na ngwugwu

A na-ejikarị PLA eme ihe n'ọhịa nkwakọ ngwaahịa. O nwere nghọta dị mma ma dabara adaba maka iji ya dị ka ihe nkwakọ ngwaahịa. Enwere ike ịhazi ihe nkiri PLA dị nro dị ka akpa na ihe mkpuchi maka ngwaahịa nri dị iche iche, ebe enwere ike ịhazi mpempe akwụkwọ PLA siri ike dị ka akpa nkwakọ ngwaahịa na ihe eji echekwa tebụl, dị ka iko ihe ọṅụṅụ oyi, igbe nri ehihie na efere nri abalị. Nnyocha na-egosi na ihe mkpuchi PLA nwere ọhụrụ ka mma karịa ihe mkpuchi ndị ọzọ dị ka PE, nakwa n'ihi na ọ bụ polymer kristal hydrophobic, ọ nwere ezigbo iguzogide mmiri, mmanya na mmanụ, na-eme ka o kwe omume ịchekwa nri dị ka mkpụrụ osisi na akwụkwọ nri ruo ogologo oge.

Ụfụfụ PLA na-eji nwayọọ nwayọọ dochie ihe PS e ji ụfụfụ mee n'ihe e ji eme ka ọ dị nro maka ngwa na nkwakọ ngwaahịa oyi kpọnwụrụ akpọnwụ maka azụ̀. A na-eji mkpụrụ ụfụfụ eme PLA a ma ọ dị mma nke ukwuu ma nwee ike ire ere karịa ihe ndị ọzọ e ji ụfụfụ mee, ọ naghịkwa akpata mmetọ gburugburu ebe obibi.

Uru na ọghọm nke ihe nkiri polylactic acid

N'afọ ndị na-adịbeghị anya, PLA bụ ihe e ji eme polima a ma ama nke ukwuu. PLA nwere ike ire ere ma enwere ike iji ya na kọntaktị ozugbo na ngwaahịa nri acidic na mmanụ, wdg. PLA nwere ike siri ike, tensile dị elu na modulus flexural karịa resins nkịtị, ezigbo biocompatibility na biodegradability, ihe ikpeazụ nke mbibi bụ mmiri na carbon dioxide, enweghị mmetọ nke abụọ, na-eme ka ọ bụrụ otu n'ime polima kacha ekwe nkwa iji dochie plastik ọdịnala. Nke a na-eme ka ọ bụrụ otu n'ime polima kacha ekwe nkwa iji dochie plastik ọdịnala. Agbanyeghị, PLA n'onwe ya nwere ụfọdụ ọghọm nke na-ebelata oke ojiji ya. Mgbanwe ya adịghị mma, ike mmetụta ya, ịgbatị ya na ihe mgbochi ya dị ala karịa nke resins a na-ejikarị eme ihe.

Site na nhazi nke PLA, a pụrụ ịhụ na otu carbonyl dị na yinye molekul PLA na-ejikọta ọnụ na atọm oxygen dị nso, ma dịkwa nso na atọm carbon dị nso, yabụ ọ dịghị mfe ịtụgharị.

Tinyere nke ahụ, PLA nwere ike imebi ma ọ bụrụ na e nwee asịd, ntọala, mmanya na mmiri mgbe agbazere ya, ọ naghịkwa enwe ike iguzogide okpomọkụ nke ọma. Iji mee ka PLA dịkwuo mma ma mezuo ihe achọrọ maka nkwakọ ngwaahịa pụrụ iche, ọ dị mkpa ka a gbanwee PLA iji hụ na nchekwa na iguzosi ike n'ezi ihe n'oge njem na nchekwa. Ọtụtụ ndị ọkachamara n'ime obodo na mba ofesi amụọla mgbanwe nke PLA iji melite mgbanwe ya na iguzogide okpomọkụ site na iwu nke nhazi ihe eji emepụta PLA na mgbanwe nke ihe nkiri ya iji mee ka asọmpi ya na ngwaahịa plastik sitere na mmanụ ala dịkwuo mma.

Mgbanwe agbakwunyere na ihe nkiri polylactic acid

Ụzọ kachasị mma isi mee ka mgbanwe ahụ ka mma bụ itinye eriri modulus dị elu na matrix polymer maka mgbanwe ngwakọta iji melite ọghọm nke modulus dị ala na obere ike nke plastik. Eriri osisi eke nwere uru nke ike pụrụ iche dị elu, akụrụngwa buru ibu, obere ọnụ ahịa, mmeghari ohuru na ire ere, wdg. Ọ bụ otu n'ime eriri ndị a na-ejikarị eme ihe na ngwakọta polymer ugbu a.

Mgbanwe siri ike nke ihe nkiri polylactic acid

PLA bụ polima iko nwere ogologo dị ala mgbe ezumike gasịrị (Onye nrụpụta igwe extrusion mpempe akwụkwọ mpempe akwụkwọ.