High -temperature polystrackic acid (PLA) ndi imodzi mwamapulasitiki owonongeka omwe amawonongeka kwambiri pofufuza ndikugwiritsa ntchito.Zake zopangira zimachokera ku ulusi wongowonjezwdwa wa zomera, chimanga, zaulimi ndi -zakudya, ndi zina zotero, zomwe zimakhala ndi biodegradability yabwino.PLA ili ndi makina abwino kwambiri ndipo ndi ofanana ndi pulasitiki ya polypropylene.Itha kusintha pulasitiki ya PP ndi PET m'magawo ena.Pa nthawi yomweyi, imakhala ndi gloss yabwino, kuwonekera, kumva, ndi bacteriostatic.
1. Kupanga kwapamwamba -kutentha kwa polystraphin PLA
Pakadali pano, pali mitundu iwiri ya njira zophatikizira za PLA.Imodzi ndi njira yophatikizira mwachindunji.Lactic acid yatsala pang'ono kukhetsa madzi ndikuchepera pa kutentha kwambiri komanso kutsika kwamphamvu.Kapangidwe kake ndi kosavuta komanso mtengo wake ndi wotsika, koma mtundu wa mamolekyulu wazinthu ndi wosagwirizana ndipo zotsatira zake ndizosauka.Zina ndikuti propylecly polymerization ya Cyrne ndiyovomerezeka, yomwe ndi njira yopangira panopo.Njira yeniyeni ndi iyi.
PLA ndi yovomerezeka, yokhala ndi magwiridwe antchito apamwamba, mtundu wabwino wazinthu, komanso mtengo wokwera.
2. Degradability ya high-temperature polystraphin PLA
PLA imakhala yokhazikika kutentha kwa chipinda, koma ndikosavuta kutsitsa CO2 mwachangu ndi madzi pamalo ofunda pang'ono, acid ku chikho cha mphete yautumiki, ndi chilengedwe cha tizilombo.Chifukwa chake, zinthu za PLA zitha kugwiritsidwa ntchito kugwiritsa ntchito chilengedwe ndi zodzaza kuti zigwiritsidwe ntchito motetezeka panthawi yovomerezeka, ndipo zitha kusokonezedwa pakangosiyidwa.
Zinthu zomwe zimakhudza kuwonongeka kwa PLA zimaphatikizapo mtundu wa mamolekyulu, dziko la crystalline, mawonekedwe ang'onoang'ono, kutentha kwa chilengedwe ndi chinyezi, mtengo wa pH, nthawi yowala komanso chilengedwe.
PLA ndi zipangizo zina zimasakanizidwa ndi zipangizo zina zomwe zingakhudze liwiro la kuwonongeka.Mwachitsanzo, PLA imawonjezera kuchuluka kwa ufa wamatabwa kapena udzu wa chimanga ndi ulusi kuti ipititse patsogolo kwambiri kuwonongeka.
3. kukana kutentha kwa polystrackic acid PLA
Kutsekereza kumatanthauza kuthekera koletsa mpweya ndi nthunzi yamadzi kudzera muzinthuzo.Kugawikana kwa zinthu zotsekereza ndikofunikira kwambiri pakuyika zida.Pakadali pano, thumba la pulasitiki lodziwika kwambiri pamsika ndizinthu zophatikizika za Plapbat.Kukana kwa filimu ya PLA kumatha kukulitsa gawo logwiritsira ntchito.
Zomwe zimakhudza kutsekeka kwa PLA makamaka zimaphatikizapo zinthu zawo (mapangidwe a maselo ndi mawonekedwe a crystalline) ndi zinthu zakunja (kutentha, chinyezi, mphamvu yakunja).
1. Kuwotcha filimu ya PLA kudzachepetsa kutsekeka kwake, kotero PLA siyenera kuyika chakudya monga chakudya chomwe chiyenera kutenthedwa.
2 PLA kutambasula mkati mwamitundu ina kumatha kukulitsa kukana.Pamene chiŵerengero chamakokedwe chikuwonjezeka kuchokera ku 1 mpaka 6.5, crystallization ya PLA imakhala bwino kwambiri, kotero kuti kulepheretsa kumakula.
3. Kuonjezera zotchinga (monga dongo ndi fiber) ku gawo la PLA kungapangitse kutsekeka kwa PLA.Izi ndichifukwa choti kutsekereza njira yopindika yamadzi kapena gasi kulowa m'mamolekyu ang'onoang'ono.
4. Pailoring mankhwala pamwamba pa filimu PLA akhoza kusintha kukana.
4. PLA ya makina ntchito
PLA ili ndi mphamvu zabwino.Zochita zamakina ndizofanana ndi PP, koma kusowa kwamphamvu ndikosavuta kupindika ndi kupunduka, ndipo nthawi zambiri kumafunika kulimba ndikusinthidwa.Pofuna kuonetsetsa kuwonongeka kwa PLA, PLA ndi ntchito zina zapulasitiki nthawi zambiri zimasakanizidwa ndi utomoni wosasunthika.PBAT, PBS, PCL, mphira wachilengedwe ndi zinthu zina zimatha kusintha kulimba kwa PLA.
5. PLA ya kuwala ntchito
PLA ili ndi mawonekedwe osowa komanso onyezimira a pulasitiki ena owonongeka, omwe ndi ofanana ndi pepala lagalasi ndi PET, oyenera kugwiritsidwa ntchito (zopaka zowoneka bwino, zokongoletsa bwino. Nthawi zambiri, kuwonekera ndi kupepuka kwa PLA sikuyenera kusinthidwa. Musachepetse kuwonekera kwake bwino momwe mungathere kuti muwonetsetse kuti mawonekedwe ake amawonekera ndi zokongoletsera.
PLA mandala ma CD bokosi
6. Kutentha kwa PLA
Kukhazikika kwamafuta azinthu za PLA ndikofanana ndi PVC, koma kutsika kuposa PP, PE ndi PS.Kutentha kwa processing nthawi zambiri kumayendetsedwa pakati pa 170 ~ 230 ° C. Ndikoyenera jekeseni, kutambasula, kutulutsa, kuwomba, kumenyedwa kwa 3D, etc.
Pulogalamu ya PLA
Mu processing kwenikweni, ndi PLA crystallization mlingo ndi pang'onopang'ono ndipo zambiri amafuna kusinthidwa.Chifukwa cha pang'onopang'ono ndi otsika mlingo crystallization, kutentha mapindikidwe kutentha kwa PLA ndi otsika, amene malire ake ntchito pa ma CD kutentha - anadzazidwa kapena matenthedwe yolera yotseketsa mankhwala.
Pofuna kukonza kristalo wa PIA ndi crystallinity, chiyero cha kuwala cha PLA chikhoza kusinthidwa momwe mungathere panthawi yopanga.Kuchiza kwa Antuction ndi njira yosinthira PA crystallinity.Kuphatikiza apo, imatha kuwonjezeredwa ndi zida za nyukiliya kuti ipititse patsogolo mawonekedwe a crystallization, kusintha mawonekedwe ake, potero kuwongolera kutentha kwa kutentha, ndikuwongolera kutentha kwake.
Kutentha kwakukulu kwa 3D kusindikiza PLA
7. Kuchita kwa antibacterial kwa PLA
PLA ikhoza kupanga malo ofooka acidic pamwamba pa mankhwala, omwe ali ndi zotsatira za bacteriostatic ndi mildew.Ngati wothandizira antibacterial agwiritsidwa ntchito kufika kupitirira 90% ya mlingo wa antibacterial, angagwiritsidwe ntchito popaka antibacterial mankhwala.
PLA mtima stent, antibacterial PLA nthawi zambiri amagwiritsidwa ntchito pazachipatala
Nthawi zambiri ntchito inorganic antibacterial wothandizira makamaka siliva, mkuwa, nthaka ndi zitsulo zina.Mabakiteriya omwe amagwiritsidwa ntchito kwambiri a Hango amaphatikizapo mankhwala a vanadal kapena ethyl vanadal.Chitetezo cha chakudya cha ma antibacterial agents ena chiyenera kuwerengedwa.Nthawi zambiri organic The antibacterial wothandizira ndi osauka ndipo nthawi yovomerezeka ndi yochepa.
8. Kuchita kwamagetsi kwa PLA
PLA akhoza kukonzekera particles conductive monga mpweya wakuda (CB), carbon nanotubes (CNTS), mpweya CHIKWANGWANI (CFS), kapena miyala mphete.Conductive polima zophatikizika zida zimagwiritsidwa ntchito kwambiri mu anti -static pulasitiki, electromagnetic shielding materials, kudziletsa kutentha kutentha -thermal zipangizo, positive kutentha coefficient zipangizo, ndi zipangizo zachilengedwe.
CPCS, yomwe idakhazikitsidwa ndi PLA, ilinso ndi kuwonongeka komanso kuyanjana kwachilengedwe.Itha kugwiritsidwa ntchito pakuyika kwapadera kwa anti-static, ma electromagnetic shielding ma CD, komanso ma CD anzeru.Mwachitsanzo, PLA m'munsi conductive polima angagwiritsidwe ntchito kwa mpweya kapena masensa madzi kuti azindikire zakudya khalidwe chakudya.
Nthawi yotumiza: Oct-08-2022