ʻO ka waika polystrackic kiʻekiʻe (PLA) kekahi o nā plastics degradable i ʻoi aku ka maikaʻi no ka noiʻi a me nā noi.Loaʻa kāna mau mea maka mai nā mea kanu hiki ke hoʻololi ʻia, ka kulina, nā huahana mahiʻai, a me nā mea ʻē aʻe, he biodegradability maikaʻi.Loaʻa iā PLA nā waiwai mechanical maikaʻi loa a ua like ia me ka plastic polypropylene.Hiki iā ia ke hoʻololi i ka plastik PP a me PET i kekahi mau māla.I ka manawa like, loaʻa iā ia ka nani o ka nani, ka ʻike, ka manaʻo, a me kekahi mau bacteriostatic.
1. ʻO ke kūlana hana o ka polystraphin PLA kiʻekiʻe
I kēia manawa, ʻelua ʻano o nā ala synthesis o PLA.ʻO kekahi ke ʻano hoʻohui pololei.ʻO ka wai lactic acid e kokoke ana e hoʻoheheʻe a emi i ka wela kiʻekiʻe a me ke kaomi haʻahaʻa.He maʻalahi ke kaʻina hana a he haʻahaʻa ke kumukūʻai, akā ʻaʻole kūlike ka maikaʻi o ka molecular huahana a maikaʻi ʻole ka hopena noi maoli.ʻO ka mea ʻē aʻe ʻo ka propylecly polymerization o Cyrne he kānāwai, ʻo ia ke ʻano hana nui o kēia manawa.Penei ka hana kiko'ī.
He kānāwai ʻo PLA, me ka hana kiʻekiʻe, ka maikaʻi o ka huahana, a me ke kumu kūʻai kiʻekiʻe.
2. Degradability o ka polystraphin PLA kiʻekiʻe
ʻOi aku ka paʻa o ka PLA i ka mahana o ka lumi, akā maʻalahi ka hoʻohaʻahaʻa koke i ka CO2 a me ka wai ma kahi ʻoi aku ka kiʻekiʻe o ka mahana, ka waika i ke kīʻaha kīʻaha lawelawe, a me ka microbial environment.No laila, hiki ke hoʻohana ʻia nā huahana PLA e hoʻohana i ke kaiapuni a me nā mea hoʻopihapiha e hoʻohana pono ʻia i ka wā kūpono, a hiki ke hoʻohaʻahaʻa ʻia i ka manawa ma hope o ka haʻalele.
ʻO nā mea e pili ana i ka hoʻohaʻahaʻa ʻana i ka PLA e pili ana i ka molecular quality, crystalline state, micro structure, environmental temperature and humidity, pH value, light time and environmental microorganism.
Hoʻohui ʻia ʻo PLA a me nā mea ʻē aʻe me nā mea ʻē aʻe e hiki ke hoʻopilikia i ka wikiwiki degradation.No ka laʻana, hoʻohui ʻo PLA i kahi nui o ka pauka lāʻau a i ʻole ka mauʻu kulina a me ka fiber e hoʻolalelale i ka helu degradation.
3. kū'ē i ke kiʻekiʻe wela polystrapic acid PLA
ʻO ke keʻakeʻa e pili ana i ka hiki ke pale i ke kinoea a me ka mahu wai ma o ka mea.He mea koʻikoʻi ka māhele ʻana i nā mea pale no nā mea paʻi.I kēia manawa, ʻo ka ʻeke plastik ʻoki maʻamau ma ka mākeke ʻo Plapbat composite material.Hiki i ke kū'ē o ka kiʻiʻoniʻoni PLA ke hoʻonui i ke kahua noi.
ʻO nā mea e pili ana i ka blockage PLA ka nui o kā lākou mau kumu ponoʻī (ka molecular structure a me ka crystalline state) a me nā mea o waho (ka mahana, ka haʻahaʻa, ka ikaika o waho).
1. ʻO ka hoʻomehana ʻana i ka kiʻiʻoniʻoni PLA e hōʻemi i kona paʻa ʻana, no laila ʻaʻole kūpono ʻo PLA no ka hoʻopili ʻana i nā meaʻai ma ke ʻano he meaʻai e pono ai ka wela.
Hiki i ka 2 PLA ke hoʻonui i ke kū'ē.Ke piʻi ka tensile ratio mai 1 a 6.5, hoʻomaikaʻi maikaʻi ʻia ka crystallization o PLA, no laila e hoʻomaikaʻi ʻia ka pale.
3. ʻO ka hoʻohui ʻana i kekahi mea pale (e like me ka pālolo a me ka fiber) i ka substrate PLA hiki ke hoʻomaikaʻi i ke keakea o PLA.ʻO kēia no ka pale ʻana i ke ala piʻo o ke komo ʻana o ka wai a i ʻole ke kinoea o nā molekole liʻiliʻi.
4. Hiki ke hoʻomaikaʻi i ka pale ʻana i ka paioring ma luna o ka ʻili o ke kiʻi PLA.
4. Ka hana mechanical a PLA
He ikaika maikaʻi ko PLA.ʻO nāʻano mechanical e like me ka PP, akāʻo ka nele o ka paʻakikī he maʻalahi ke kulou a me ka hoʻololiʻana, aʻo ka mea maʻamau e pono e paʻakikī a hoʻololi.I mea e hōʻoia ai i ka biodegradability o PLA, PLA a me nā hana plastic ʻē aʻe e hui pū ʻia me ka resin biodegradable.Hiki i ka PBAT, PBS, PCL, ka ʻōpala maoli a me nā mea ʻē aʻe ke hoʻomaikaʻi i ka paʻakikī PLA.
5. ʻO ka hana optical o PLA
Loaʻa ka PLA i ka ʻike maka a me ka nani o nā plastik degradable ʻē aʻe, e like me ka pepa aniani a me ka PET, kūpono loa no ka hoʻohana ʻana (ka ʻike maka, ka hopena hoʻonaninani maikaʻi. ʻO ka mea maʻamau, ʻaʻole pono e hoʻomaikaʻi ʻia ka ʻike a me ka māmā o PLA. Pono ia. e hoʻomaopopo ʻia aia nā mea ʻē aʻe i loko o nā mea ʻē aʻe.
PLA pahu pahu puka aniani
6. PLA hana wela
ʻO ke kūpaʻa wela o nā mea PLA e like me PVC, akā haʻahaʻa ma mua o PP, PE a me PS.Hoʻomaluʻia ka mahana hana ma waena o 170 ~ 230 ° C. He kūpono ia no ka injection, stretching, extrusion, blowing, 3D beating, etc. Essence
PLA papaʻaina
I ka hana maoli, ua lohi ka PLA crystallization rate a pono e hoʻololi.Ma muli o ka lohi a me ka haʻahaʻa crystallization rate, ka wela deformation wela o ka PLA he haʻahaʻa, ka mea i kaupalena 'ia kona noi ma luna o ka paʻi o ka wela-hoopiha a thermal sterilization huahana.
I mea e hoʻomaikaʻi ai i ka PIA crystal rate a me ka crystallinity, hiki ke hoʻomaikaʻi ʻia ka maʻemaʻe optical o PLA e like me ka hiki i ka wā hana.ʻO ka lāʻau antuction kekahi ala e hoʻomaikaʻi ai i ka crystallinity PA.Eia kekahi, hiki ke hoʻohui ʻia me nā mea nuklea e hoʻomaikaʻi i ka ʻano crystallization, hoʻomaikaʻi i kona crystallinity, a laila hoʻomaikaʻi i ka mahana deformation thermal, a hoʻomaikaʻi i kona kūpaʻa wela.
PLA paʻi 3D wela kiʻekiʻe
7. Ka hana antibacterial a PLA
Hiki i ka PLA ke hana i kahi kaiapuni ʻakika nāwaliwali ma ka ʻili o ka huahana, nona nā hopena o ka bacteriostatic a me ka mildew.Inā hoʻohana ʻia ka mea antibacterial auxiliary a hiki i ka 90% o ka helu antibacterial, hiki ke hoʻohana ʻia no ka ʻeke antibacterial o ka huahana.
Hoʻohana pinepine ʻia ka PLA cardiovascular stent, antibacterial PLA i ka lāʻau lapaʻau
ʻO nā mea hana antibacterial inorganic maʻamau ka nui o ke kālā, keleawe, zinc a me nā metala ʻē aʻe.ʻO ka bacteria Hango kūlohelohe i hoʻohana mau ʻia me ka vanadal a i ʻole ka ethyl vanadal formation compound.Pono e aʻo ʻia ka palekana o ka meaʻai o nā mea antibacterial ʻē aʻe.ʻO ka maʻamau maʻamau He ʻilihune ka lāʻau antibacterial a pōkole ka manawa kūpono.
8. Ka hana uila a PLA
Hiki iā PLA ke hoʻomākaukau i nā ʻāpana conductive e like me carbon black (CB), carbon nanotubes (CNTS), carbon fiber (CFS), a i ʻole pōhaku ringne.Hoʻohana nui ʻia nā mea hoʻohui polymer conductive i ka plastic anti-static, nā mea pale electromagnetic, ka mālama pono ʻana i ka wela wela - nā mea wela, nā mea hoʻohālikelike wela maikaʻi, a me nā mea pili i ke kaiapuni.
ʻO ka CPCS, kahi i hoʻokumu ʻia ma PLA, he degradation a me ka biocompatibility.Hiki ke hoʻohana ʻia no ka hoʻopili anti-static kūikawā, ka pale pale electromagnetic, a me ka ʻeke akamai.No ka laʻana, hiki ke hoʻohana ʻia ka polymer conductive base PLA no ke kinoea a i ʻole nā mea ʻike wai e ʻike i ka ʻike o ka meaʻai.
Ka manawa kau: Oct-08-2022