Okpomọkụ polystrackic acid (PLA) bụ otu n'ime plastik na-emebi emebi nke na-emebi emebi maka nyocha na ngwa.Akụrụngwa ya na-abịa site na eriri osisi a na-emegharịgharị, ọka, ihe eji arụ ọrụ ugbo, wdg, nke nwere ezigbo biodegradaability.PLA nwere ezigbo ihe eji arụ ọrụ ma yie plastik polypropylene.Ọ nwere ike dochie PP na PET plastic n'akụkụ ụfọdụ.N'otu oge ahụ, ọ nwere ezigbo gloss, nghọta, mmetụta na ụfọdụ bacteriostatic.
1. Ọnọdụ mmepụta nke elu-okpomọkụ polystraphin PLA
Ugbu a, e nwere ụdị ụzọ abụọ PLA si ejikọta ọnụ.Otu bụ usoro nchịkọta ozugbo.Lactic acid na-achọ ịsa mmiri wee daa na oke okpomọkụ na obere nrụgide.Usoro mmepụta dị mfe na ọnụ ahịa dị ala, mana njirimara molekụla ngwaahịa ahụ adịghị mma na mmetụta ngwa ahụ n'ezie adịghị mma.Nke ọzọ bụ na propylecly polymerization nke Cyrne bụ nke iwu kwadoro, nke bụ usoro mmepụta ihe ugbu a.Usoro a kapịrị ọnụ bụ nke a.
PLA bụ nke iwu kwadoro, yana nrụpụta nrụpụta dị elu, ezigbo ngwaahịa, yana ọnụ ahịa dị elu.
2. Dede degeneration nke elu-okpomọkụ polystraphin PLA
PLA kwụsiri ike na okpomọkụ ụlọ, mana ọ dị mfe iweda CO2 na mmiri ngwa ngwa na gburugburu ebe okpomọkụ dị elu, acid na iko mgbanaka ozi, yana gburugburu microbial.Ya mere, enwere ike iji ngwaahịa PLA mee ihe na gburugburu ebe obibi na ihe ndị na-ejuputa ka a ga-eji mee ihe n'enweghị nsogbu n'oge oge nkwado, ọ pụkwara imebi ya n'otu oge mgbe ahapụchara ya.
Ihe ndị na-emetụta nbibi PLA gụnyere àgwà molekụla, steeti kristal, nhazi micro, okpomọkụ gburugburu ebe obibi na iru mmiri, uru pH, oge ọkụ na microorganism gburugburu ebe obibi.
A na-agwakọta PLA na ihe ndị ọzọ na ihe ndị ọzọ nwere ike imetụta ọsọ nbibi.Dịka ọmụmaatụ, PLA na-agbakwunye ụfọdụ ntụ ntụ osisi ma ọ bụ ahịhịa ọka na eriri iji mee ka ọnụego mmebi ahụ dịkwuo ngwa ngwa.
3. iguzogide elu okpomọkụ polystrackic acid PLA
Ihe mgbochi na-ezo aka n'ikike igbochi gas na uzuoku mmiri site na ihe.Nkewa nke ihe mgbochi dị ezigbo mkpa maka ihe nkwakọ ngwaahịa.Ka ọ dị ugbu a, akpa rọba a na-ejikarị egbutu n'ahịa bụ ihe mejupụtara Plapbat.Nguzogide nke ihe nkiri PLA nwere ike na-agbasawanye mpaghara ngwa.
Ihe ndị na-emetụta nkwụsị PLA na-agụnyekarị ihe nke ha (nhazi molecular na steeti crystalline) na ihe ndị dị n'èzí (okpomọkụ, iru mmiri, ike mpụga).
1. Ịkụ ọkụ na ihe nkiri PLA ga-ebelata nkwụsị ya, ya mere PLA adịghị mma maka nkwakọ nri dị ka nri nke kwesịrị ikpo ọkụ.
2 PLA ịgbatị n'ime ebe ụfọdụ nwere ike ịbawanye nguzogide.Mgbe ọnụ ọgụgụ nkwụsị na-abawanye site na 1 ruo 6.5, a na-eme ka kristal nke PLA dịkwuo mma, ya mere a na-eme ka ihe mgbochi ahụ dịkwuo mma.
3. Ịtinye ụfọdụ mgbochi (dị ka ụrọ na eriri) na ngwongwo PLA nwere ike imeziwanye ihe mgbochi nke PLA.Nke a bụ n'ihi na-egbochi ụzọ na-ehulata nke mmiri ma ọ bụ gas ntinye nke obere ụmụ irighiri ihe.
4. Pailoring ọgwụgwọ n'elu ihe nkiri PLA nwere ike imeziwanye nguzogide.
4. Nrụ ọrụ igwe nke PLA
PLA nwere ezigbo ike.Ngwongwo igwe dị ka PP, mana enweghị ike dị mfe ịgbagọ na deform, ọ na-adịkarị mkpa ka a sie ike ma gbanwee.Iji hụ na biodegradability nke PLA, PLA na arụmọrụ rọba ndị ọzọ na-ejikọta ya na resin biodegradable.PBAT, PBS, PCL, roba eke na ihe ndị ọzọ nwere ike imeziwanye ike PLA.
5. Nrụpụta ngwa anya nke PLA
PLA nwere obere nghọta na gloss nke ndị ọzọ na-emebi emebi plastic, nke bụ Ẹkot iko akwụkwọ na PET, karịsịa kwesịrị ekwesị maka ojiji (visual nkwakọ, ezi mma mmetụta. N'ozuzu, na nghọta na lightness nke PLA adịghị mkpa ka mma. Ekwesịrị ka ị mara na ndị ọzọ na ndị ọzọ dị na ndị ọzọ.
Igbe nkwakọ ihe nke PLA
6. Ọrụ okpomọkụ nke PLA
Nkwụsi ike okpomọkụ nke ihe PLA dabara na PVC, mana ọ dị ala karịa PP, PE na PS.The nhazi okpomọkụ na-adịkarị na-achịkwa n'etiti 170 ~ 230 Celsius C. Ọ na-adabara maka injection, agbatị, extrusion, ịfụ, 3D iti, wdg Essence.
PLA tableware
Na nhazi n'ezie, ọnụ ọgụgụ kristal PLA na-adị nwayọọ ma na-achọkarị mgbanwe.N'ihi ịdị nwayọọ na obere crystallization ọnụego, okpomọkụ deformation okpomọkụ nke PLA dị ala, nke na-egbochi ngwa ya na nkwakọ ngwaahịa okpomọkụ - jupụtara ma ọ bụ thermal sterilization ngwaahịa.
Iji meziwanye ọnụego kristal PIA na kristal, ịdị ọcha anya PLA nwere ike ime ka ọ dịkwuo mma n'oge mmepụta.Ngwọta ntuction bụkwa ụzọ isi meziwanye kristal PA.Na mgbakwunye, enwere ike ịgbakwunye ya na ndị ọrụ nuklia iji meziwanye omume kristal, meziwanye kristal ya, si otú ahụ na-eme ka ọnọdụ okpomọkụ dị mma na-eme ka ọ dịkwuo mma, na-eme ka ọ dịkwuo ọkụ.
Igwe ọkụ dị elu 3D obibi PLA
7. Ọrụ antibacterial nke PLA
PLA nwere ike ịmepụta gburugburu acidic na-adịghị ike n'elu ngwaahịa ahụ, nke nwere mmetụta nke bacteriostatic na mildew.Ọ bụrụ na a na-eji onye na-ahụ maka nje na-enyere aka iru ihe karịrị 90% nke ọnụọgụ nje, enwere ike iji ya maka nkwakọ ngwaahịa antibacterial.
PLA cardiovascular stent, antibacterial PLA na-ejikarị eme ihe na ngalaba ahụike
A na-ejikarị ọgwụ nje na-egbu egbu inorganic eme ihe bụ ọla ọcha, ọla kọpa, zinc na ọla ndị ọzọ.Ihe nje bacteria Hango nke a na-ejikarị eme ihe na-agụnye ogige ndị na-emepụta vanadal ma ọ bụ ethyl vanadal.Ọ dị mkpa ka a mụọ nchekwa nri nke ọgwụ nje ndị ọzọ.N'ozuzu organic Onye na-ahụ maka nje bacteria adịghị mma na oge nkwado dị mkpụmkpụ.
8. Ọrụ eletriki PLA
PLA nwere ike ịkwadebe ihe ndị na-eduzi ihe dị ka carbon ojii (CB), carbon nanotubes (CNTS), eriri carbon (CFS), ma ọ bụ ringne nkume.A na-eji ihe ndị mejupụtara polymer eme ihe n'ọtụtụ ebe na plastik mgbochi static, ihe mkpuchi elektrọnịkị, okpomọkụ na-ejide onwe ya - ihe ndị na-ekpo ọkụ, ihe ngbanwe okpomọkụ dị mma, na ngwaọrụ nwere mmetụta gburugburu ebe obibi.
CPCS, nke dabere na PLA, nwekwara nbibi na ihe ndakọrịta.Enwere ike iji ya maka nkwakọ ngwaahịa mgbochi static pụrụ iche, nkwakọ ihe mkpuchi electromagnetic, yana nkwakọ ngwaahịa nwere ọgụgụ isi.Dịka ọmụmaatụ, enwere ike iji polymer conductive PLA maka gas ma ọ bụ ihe mmetụta mmiri iji chọpụta ozi ịdị mma nri.
Oge nzipu: Ọktoba 08-2022