I-high-temperature polystrackic acid (PLA) yenye yeeplastiki ezihlanjululwayo ezinokonakala ngakumbi kuphando kunye nokusetyenziswa.Izinto zayo ezikrwada zivela kwimicu yezityalo ezivuselelekayo, umbona, iimveliso zezolimo, njl.njl., ezinokonakala kwezinto eziphilayo.I-PLA ineempawu ezibalaseleyo zoomatshini kwaye iyafana neplastiki yepolypropylene.Ingathatha indawo yePP kunye ne-PET iplastiki kwezinye iindawo.Kwangaxeshanye, ineglosi elungileyo, ukucaca, ukuziva, kunye ne-bacteriostatic ethile.
1. Ubume bemveliso ye-high-temperature polystraphin PLA
Okwangoku, zimbini iindidi zeendlela zokudityaniswa kwe-PLA.Enye yindlela yokudibanisa ngokuthe ngqo.I-asidi ye-lactic imalunga nokukhupha amanzi kwaye iyancipha kwiqondo lokushisa eliphezulu kunye noxinzelelo oluphantsi.Inkqubo yokuvelisa ilula kwaye ixabiso liphantsi, kodwa umgangatho we-molecular wemveliso awulingani kwaye umphumo wesicelo wangempela ubi.Enye into yokuba i-propylecly polymerization yaseCyrne isemthethweni, eyona ndlela ikhoyo ngoku yokuvelisa.Inkqubo ethile yile ilandelayo.
I-PLA isemthethweni, kunye nokusebenza kakuhle kwemveliso, umgangatho omhle wemveliso, kunye neendleko eziphezulu.
2. Ukuthotywa komgangatho ophezulu wobushushu bepolystraphin PLA
I-PLA izinzile ngakumbi kwiqondo lobushushu begumbi, kodwa kulula ukuthoba ngokukhawuleza i-CO2 kunye namanzi kwindawo yobushushu engaphezulu kancinci, iasidi kwindebe yeringi yenkonzo, kunye nokusingqongileyo kwe-microbial.Ngoko ke, iimveliso ze-PLA zingasetyenziselwa ukusebenzisa indawo engqongileyo kunye nezizalisi ukuze zisetyenziswe ngokukhuselekileyo ngexesha lokuqinisekisa, kwaye zinokutshatyalaliswa ngexesha emva kokulahlwa.
Izinto ezichaphazela ukuthotywa kwe-PLA zibandakanya umgangatho we-molecular, i-crystalline state, i-micro structure, iqondo lokushisa kwendalo kunye nomswakama, ixabiso le-pH, ixesha lokukhanya kunye ne-microorganism yendalo.
I-PLA kunye nezinye izinto zixutywe kunye nezinye izinto ezinokuchaphazela isantya sokunciphisa.Umzekelo, i-PLA yongeza inani elithile lomgubo womthi okanye umququ wengqolowa kunye nefayibha ukukhawulezisa kakhulu izinga lokuthotywa.
3. ukumelana nobushushu obuphezulu bepolystrackic acid PLA
Ukuthintela kubhekiselele ekukwazini ukuthintela igesi kunye nomphunga wamanzi ngokusebenzisa izinto.Ukwahlulwa kwezinto zokuthintela kubaluleke kakhulu kwizinto zokupakisha.Okwangoku, eyona nto ixhaphakileyo ingxowa yeplastiki yokusika kwimarike zizinto ezihlanganisiweyo zePlapbat.Ukuchasana kwefilimu ye-PLA kunokwandisa intsimi yesicelo.
Izinto ezichaphazela ukuvalwa kwe-PLA ikakhulu ziquka izinto zabo (isakhiwo se-molecular kunye ne-crystalline state) kunye nezinto zangaphandle (ubushushu, umswakama, amandla angaphandle).
1. Ukufudumeza ifilimu ye-PLA kuya kunciphisa ukuvaleka kwayo, ngoko ke i-PLA ayifanelekanga ukupakishwa kokutya njengokutya okufuna ukufudumeza.
Ukwelula kwe-PLA ye-2 ngaphakathi koluhlu oluthile kunokunyusa ukuxhathisa.Xa umlinganiselo we-tensile ukhula ukusuka kwi-1 ukuya kwi-6.5, i-crystallization ye-PLA iphuculwe kakhulu, ngoko ke ukuphazamiseka kuphuculwe.
3. Ukongeza ukuthintela (njengodongwe kunye nefiber) kwi-PLA substrate kunokuphucula ukuvinjelwa kwe-PLA.Oku kungenxa yokuba ukuthintela indlela yokugoba yamanzi okanye igesi yokungena kweeathomu ezincinci.
4. Ukunyangwa kwe-Pailoring ebusweni befilimu ye-PLA kunokuphucula ukuxhathisa.
4. Ukusebenza koomatshini bePLA
I-PLA inamandla amahle.Iimpawu zomatshini zifana nePP, kodwa ukungabikho kokuqina kulula ukugoba kunye nokukhubazeka, kwaye ngokuqhelekileyo kufuneka kugxininiswe kwaye kulungiswe.Ukuze kuqinisekiswe ukubola kwe-biodegradability ye-PLA, i-PLA kunye nezinye izinto zeplastiki zihlala zixutywa kunye ne-biodegradable resin.I-PBAT, i-PBS, i-PCL, i-rubber yendalo kunye nezinye izinto zinokuphucula ukuqina kwe-PLA.
5. Ukusebenza kwamehlo kwePLA
I-PLA inokukhanya okunqabileyo kunye neglosi yenye iplastiki eyonakaliswayo, elingana nephepha leglasi kunye ne-PET, ilungele ukusetyenziswa (ukupakishwa okubonakalayo, umphumo omuhle wokuhombisa. Ngokuqhelekileyo, ukucaca kunye nokukhanya kwe-PLA akufuneki kuphuculwe. Kufuneka kuphuculwe. Qaphela ukuba enye kwenye ikwenye.Musa ukunciphisa ukubonakala kwayo okuhle kangangoko kunokwenzeka ukuqinisekisa ukupakishwa kwayo kwembonakalo kunye nesiphumo sokuhombisa.
Ibhokisi yokupakisha ecacileyo yePLA
6. Ukusebenza kwe-PLA kwe-thermal
Ukuzinza kwe-thermal yezinto ze-PLA zilingana ne-PVC, kodwa ngaphantsi kwePP, i-PE kunye ne-PS.Ubushushu bokusebenza bulawulwa ngokubanzi phakathi kwe-170 ~ 230 ° C. Ilungele ukutofa, ukolula, ukukhupha, ukuvuthela, ukubetha kwe-3D, njl njl.
Itafile ye-PLA
Ekuqhubekeni kokwenyani, izinga le-PLA crystallization licotha kwaye lifuna ngokubanzi ukuguqulwa.Ngenxa yesantya esicothayo kunye nesincinci se-crystallization, ubushushu be-deformation ye-PLA buphantsi, obunciphisa ukusetyenziswa kwayo kwi-package ye-heat-filled or thermal sterilization.
Ukuze kuphuculwe izinga le-crystal ye-PIA kunye ne-crystallinity, i-PLA yokucoca i-optical inokuphuculwa kangangoko kunokwenzeka ngexesha lemveliso.Unyango lwe-Antuction kwakhona yindlela yokuphucula i-PA crystallinity.Ukongeza, inokongezwa kunye neearhente zenyukliya ukuphucula indlela yokuziphatha yecrystallization, iphucule ubucwebe bayo, ngaloo ndlela iphucula ubushushu bokutshintsha kwe-thermal, kunye nokuphucula ukumelana nobushushu.
Ubushushu obuphezulu be-PLA yoshicilelo lwe-3D
7. Ukusebenza kwe-antibacterial ye-PLA
I-PLA inokwenza indawo ebuthakathaka ye-acidic ebusweni bemveliso, enemiphumo ye-bacteriostatic kunye ne-mildew.Ukuba i-agent encedisayo ye-antibacterial isetyenziselwa ukufikelela ngaphezu kwe-90% yezinga lokulwa ne-antibacterial, ingasetyenziselwa ukupakishwa kwe-antibacterial yemveliso.
I-PLA ye-cardiovascular stent, i-PLA ye-antibacterial isoloko isetyenziswa kwintsimi yezonyango
Ngokuqhelekileyo i-antibacterial agents ezisetyenziswayo ziyisilivere, ubhedu, i-zinc kunye nezinye isinyithi.Iibhaktheriya zeHango ezisetyenziswa ngokuqhelekileyo ziquka i-vanadal okanye i-ethyl vanadal formation compounds.Ukhuseleko lokutya lwezinye ii-antibacterial agents kufuneka lufundwe.Ngokuqhelekileyo i-organic I-agent ye-antibacterial ihluphekile kwaye ixesha lokuqinisekisa lifutshane.
8. Ukusebenza kombane kwePLA
I-PLA inokulungiselela iinqununu eziqhubayo ezifana ne-carbon black (CB), i-carbon nanotubes (CNTS), i-carbon fiber (CFS), okanye i-ringne yamatye.Iimathiriyeli zepolymer ezisebenzayo zisetyenziswa kakhulu kwiplastiki echasene ne-static, izixhobo zokukhusela i-electromagnetic, ukuzilawula ubushushu bobushushu-izinto ezishushu, izixhobo ezifanelekileyo zokulingana kobushushu, kunye nezixhobo ezibuthathaka zokusingqongileyo.
I-CPCS, esekwe kwi-PLA, nayo inokuthotywa kunye ne-biocompatibility.Ingasetyenziselwa ukupakishwa okukhethekileyo kwe-anti-static, ukupakishwa kwe-electromagnetic shielding, kunye nokupakishwa okukrelekrele.Umzekelo, isiseko se-PLA se-polymer conductive singasetyenziselwa igesi okanye izinzwa zolwelo ukubona ulwazi lomgangatho wokutya.
Ixesha lokuposa: Oct-08-2022