Yakakwira -temperature polystrackic acid (PLA) ndeimwe yeakanyanya kuparara mapurasitiki ayo anoshatisa zvakanyanya pakutsvaga nekushandisa.Zvishandiso zvaro zvakasvibirira zvinobva kune zvinogonekazve chirimwa fiber, chibage, zvekurima ne-zvigadzirwa, nezvimwewo, zvine biodegradability yakanaka.PLA ine yakanakisa michina zvivakwa uye yakafanana ne polypropylene plastiki.Inogona kutsiva PP uye PET plastiki mune mamwe minda.Panguva imwecheteyo, ine gloss yakanaka, kujeka, kunzwa, uye imwe bacteriostatic.
1. Mamiriro ekugadzirwa kwepamusoro-temperature polystraphin PLA
Parizvino, kune marudzi maviri ePLA's synthesis nzira.Imwe inzira yekuunganidza yakananga.Iyo lactic asidhi yave kuda kudzikisa mvura uye kuderera pakupisa kwakanyanya uye kuderera kwekumanikidza.Maitiro ekugadzira ari nyore uye mutengo wakaderera, asi chigadzirwa chemolecular mhando haina kuenzana uye iyo chaiyo yekushandisa mhedzisiro haina kunaka.Imwe yacho ndeyekuti propylecly polymerization yeCyrne iri pamutemo, inova ndiyo yazvino nzira yekugadzira yekugadzira.Maitiro chaiwo ndeaya anotevera.
PLA iri pamutemo, ine kugadzirwa kwakanyanya, kunaka kwechigadzirwa, uye mutengo wakakwira.
2. Degradability ye-high-temperature polystraphin PLA
PLA yakanyanya kugadzikana pakamuri tembiricha, asi zviri nyore kukurumidza kushatisa CO2 uye mvura munzvimbo yakati wandei tembiricha, asidhi kushumiro ring cup, uye microbial nharaunda.Naizvozvo, zvigadzirwa zvePLA zvinogona kushandiswa kushandisa nharaunda uye mafirita kuti ashandiswe zvakachengeteka panguva yechokwadi, uye anogona kuderedzwa panguva mushure mekusiiwa.
Izvo zvinhu zvinokanganisa kuparara kwePLA zvinosanganisira mhando yemamorekuru, crystalline state, micro chimiro, tembiricha yezvakatipoteredza uye hunyoro, pH kukosha, nguva yechiedza uye hutachiona hwezvakatipoteredza.
PLA nezvimwe zvinhu zvakasanganiswa nezvimwe zvinhu zvinogona kukanganisa kukurumidza kuderedzwa.Semuenzaniso, PLA inowedzera humwe hupfu hwehuni kana huswa hwechibage uye faibha kuti ikurumidze zvikuru kuderera.
3. kuramba kupisa kwepamusoro polystrackic acid PLA
Kuvharisa zvinoreva kugona kudzivirira gasi uye chipfunga chemvura kuburikidza nezvinhu.Kupatsanurwa kwekuvhara zvinhu kwakakosha zvakanyanya pakurongedza zvinhu.Parizvino, yakajairika yekucheka bhegi repurasitiki pamusika ndeyePlapbat composite zvinhu.Kupokana kwefirimu rePLA kunogona kuwedzera nzvimbo yekushandisa.
Zvinhu zvinokanganisa kuvharika kwePLA zvinonyanya zvinosanganisira zvinhu zvavo (molecular chimiro uye crystalline state) uye zvekunze zvinhu (tembiricha, humidity, simba rekunze).
1. Kupisa firimu rePLA kunoderedza kuvhara kwayo, saka PLA haina kukodzera kurongedza zvokudya sezvokudya zvinoda kupisa.
2 PLA inotambanudza mukati meimwe nhanho inogona kuwedzera kuramba.Kana iyo tensile chiyero ichiwedzera kubva pa1 kusvika ku6.5, iyo crystallization yePLA inovandudzwa zvakanyanya, saka kuvharika kunovandudzwa.
3. Kuwedzera zvimwe kuvhara (zvakadai sevhu uye fiber) kune substrate yePLA inogona kuvandudza kuvharwa kwePLA.Izvi zvinodaro nekuti kuvhara nzira yekukotama yemvura kana gasi kupinda kwemamorekuru madiki.
4. Pailoring kurapwa pamusoro pefirimu yePLA inogona kuvandudza kushorwa.
4. PLA's mechanical performance
PLA ine simba rakanaka.Iwo emakanika zvivakwa akafanana nePP, asi kushaikwa kwekuomarara kuri nyore kukotama nekuremara, uye kazhinji inoda kuomeswa nekugadziridzwa.Kuti ive nechokwadi chekuparara kwePLA, PLA uye kumwe kuita kwepurasitiki zvinowanzosanganiswa nebiodegradable resin.PBAT, PBS, PCL, rabha rechisikigo uye zvimwe zvinhu zvinogona kuvandudza kuoma kwePLA.
5. PLA's optical performance
PLA ine kujeka kusingawanzo uye kupenya kwemamwe mapurasitiki anoparara, ayo akaenzana nebepa regirazi uye PET, kunyanya yakakodzera kushandiswa (kuona kurongedza, kunaka kwekushongedza maitiro. Kazhinji, kujeka uye kureruka kwePLA hakudi kuvandudzwa. Zvinofanira cherechedza kuti imwe mune imwe iri mune imwe.Usaderedze kujeka kwayo kwakanaka zvakanyanya sezvinobvira kuve nechokwadi chekurongedza kwayo kuoneka uye kushongedzwa kwayo.
PLA yakajeka yekurongedza bhokisi
6. PLA's thermal performance
Kugadzikana kwekupisa kwezvinhu zvePLA zvakaenzana nePVC, asi yakaderera pane PP, PE uye PS.Iyo tembiricha yekugadzirisa inowanzodzorwa pakati pe170 ~ 230 ° C. Inokodzera jekiseni, kutambanudza, extrusion, kuvhuvhuta, 3D kurova, nezvimwe Essence.
PLA tableware
Mukugadzirisa chaiko, iyo PLA crystallization rate inononoka uye kazhinji inoda kugadziridzwa.Nekuda kweiyo inononoka uye yakaderera crystallization mwero, kupisa kwekupisa kwePLA kwakadzikira, izvo zvinoganhurira kushandiswa kwayo pakurongedzerwa kwezvinhu zvinopisa-zvakazadzwa kana kupisa sterilization zvigadzirwa.
Kuti uvandudze iyo PIA crystal rate uye crystallinity, PLA's optical kuchena kunogona kuvandudzwa zvakanyanya sezvinobvira panguva yekugadzira.Antuction kurapwa zvakare inzira yekuvandudza PA crystallinity.Pamusoro pezvo, inogona kuwedzerwa nenyukireya maajenti kuvandudza maitiro ekristalllization, kuvandudza kupenya kwayo, nekudaro kuvandudza tembiricha yekupisa kupisa, nekuvandudza kupisa kwayo.
High tembiricha 3D kudhinda PLA
7. PLA's antibacterial performance
PLA inogona kuumba nzvimbo isina simba ine acidic pamusoro pechigadzirwa, iyo ine migumisiro ye bacteriostatic uye mildew.Kana iyo yekubatsira antibacterial agent inoshandiswa kusvika inopfuura 90% yeyero antibacterial, inogona kushandiswa kurongedza antibacterial yechigadzirwa.
PLA yemwoyo stent, antibacterial PLA inowanzoshandiswa munharaunda yezvokurapa
Inowanzo shandiswa inorganic antibacterial agents anonyanya sirivha, mhangura, zingi uye mamwe masimbi.Iyo inowanzoshandiswa organic Hango mabhakitiriya anosanganisira vanadal kana ethyl vanadal formation compounds.Kuchengetedzwa kwechikafu kwemamwe antibacterial agents kunoda kuongororwa.Kazhinji organic Iyo antibacterial agent haina kunaka uye nguva yechokwadi ipfupi.
8. Kuita kwemagetsi kwePLA
PLA inogona kugadzirira conductive particles senge kabhoni dema (CB), kabhoni nanotubes (CNTS), kabhoni faibha (CFS), kana dombo ringne.Conductive polymer composite zvinhu zvinoshandiswa zvakanyanya muanti-static plastiki, electromagnetic shielding materials, self-control tembiricha kupisa -thermal zvinhu, yakanaka tembiricha coefficient zvinhu, uye nharaunda inonamira michina.
CPCS, iyo yakavakirwa paPLA, zvakare ine kuderera uye biocompatibility.Inogona kushandiswa kune yakakosha anti-static packaging, electromagnetic shielding kurongedza, uye nehungwaru kurongedza.Semuenzaniso, PLA base conductive polymer inogona kushandiswa gasi kana mvura sensors kuona ruzivo rwemhando yechikafu.
Nguva yekutumira: Oct-08-2022