PLA a me PBAT

ʻOiai he mau mea biodegradable nā ​​mea ʻelua, ʻokoʻa ko lākou mau kumu. Loaʻa ka PLA mai nā mea olaola, ʻoiai ʻo PKAT i loaʻa mai nā mea petrochemical.

ʻO ka mea monomer o ka PLA he waika lactic, ka mea maʻamau i wili ʻia e nā hua ʻōpala e like me ke kulina e unuhi i ka starch, a laila hoʻololi ʻia i ka glucose i hoʻomaʻemaʻe ʻole ʻia.

Hoʻopili ʻia ka glucose ma ke ʻano like me ka pia a i ʻole ka waiʻona, a ma hope e hoʻomaʻemaʻe ʻia ka monomer lactic acid. Hoʻopili hou ʻia ka ʻakika lactic e ka lactide i ka poly (lactic acid).

ʻO BAT polyterephthalic acid - butanediol adipate, no ka petrochemical biodegradable plastic, mai ka ʻoihana petrochemical, ʻo ka monomer nui he terephthalic acid, butanediol, adipic acid.

Inā he aliʻi ʻōpio a ikaika ka PLA, a laila he ʻulaʻula ʻulaʻula wahine ʻo PBAT. He modulus kiʻekiʻe ka PLA, ka ikaika tensile kiʻekiʻe a me ka ductility maikaʻi ʻole, ʻoiai ʻo PKAT he kiʻekiʻe ka ulu ʻana o ka haʻihaʻi a me ka ductility maikaʻi.

ʻO ka PLA e like me ka PP i loko o ka plastic plastic, injection molding, extrusion, blow molding, blister hiki ke hana i nā mea āpau, ʻoi aku ka PBAT e like me LDPE, ʻoi aku ka maikaʻi o ka pahu kiʻiʻoniʻoni.

ʻO ka PLA he māmā melemele māmā paʻa, kūpaʻa wela maikaʻi, ka mahana wela 170 ~ 230 ℃, loaʻa ke kūpaʻa solvent maikaʻi, hiki ke hana ʻia i nā ʻano like ʻole, e like me ka extrusion, spinning, biaxial stretching, injection blow molding.

E like me ka PP, ua like ka māliko me PS, ʻaʻole hiki ke hoʻohana ʻia ka PLA maʻemaʻe e hoʻomākaukau pono i nā huahana, PLA ka ikaika kiʻekiʻe a me ka modulus compression, akā ʻo kona paʻakikī paʻakikī a maikaʻi ʻole, ʻaʻole hiki ke maʻalahi a me ka elasticity, maʻalahi e kulou i ka deformation, ka hopena a me ka waimaka. ʻilihune ke kūʻē.

Hoʻohana pinepine ʻia ʻo PLA e hana i nā huahana degradable ma hope o ka hoʻololi ʻana, e like me nā mea ʻai meaʻai a me nā mauʻu.

PBAT mea he semi-crystalline polymer, maʻamau ka crystallization wela ma kahi o 110 ℃, a me ka helu heheʻe ma kahi o 130 ℃, a me ka mānoanoa ma waena o 1.18g/mL a me 1.3g/mL. ʻO ka crystallinity o PBAT e pili ana i 30%, a ʻoi aku ka paʻakikī o Shore ma luna o 85. ʻO ka hana ʻana o ka PBAT e like me LDPE, a hiki ke hoʻohana ʻia kahi hana like no ka puhi kiʻiʻoniʻoni. Mechanical waiwai o ka PBA a me ka PBT mau ano, maikai ductility, elongation ma break, wela a me ka hopena. No laila, e hoʻololi ʻia nā huahana degradation, ka mea nui i mea e hoʻokō ai i nā koi hana o nā huahana, akā e hōʻemi hoʻi i nā kumukūʻai.

ʻOiai he hana ʻokoʻa ka PLA a me PBAT, hiki iā lākou ke hoʻokō i kekahi i kekahi! Pākuʻi ʻo PLA i ka ʻoʻoleʻa o ke kiʻi ʻoniʻoni PBAT, hiki i ka PBAT ke hoʻomaikaʻi i ka maʻalahi o ka PLA, a hoʻopau pū i ke kumu palekana kaiapuni.

I kēia manawa, ʻo ka hapa nui o nā noi e pili ana i nā mea PBAT i ka mākeke nā huahana ʻeke membrane. Hoʻohana nui ʻia nā mea hoʻololi PBAT no ka puhi ʻana i ke kiʻiʻoniʻoni e hana i nā ʻeke, e like me nā ʻeke kūʻai.

Hoʻohana nui ʻia nā mea PLA no ka hoʻoheheʻe ʻia ʻana, a ʻo nā mea i hoʻololi ʻia ʻo PLA e hoʻohana nui ʻia no nā mea ʻai meaʻai hiki ke hoʻopau ʻia, e like me nā pahu meaʻai degradable, degradable straws, etc.

No ka manawa lōʻihi, emi iki ka mana o PLA ma mua o ka PBAT. Ma muli o ka nui o ka bottleneck o ka ʻenehana hana PLA a me ka nele o ka holomua i ka holomua o ka lactide, ʻaʻole i piʻi nui ka mana o PLA ma Kina, a ʻoi aku ka maikaʻi o ke kumukūʻai o nā kumu waiwai PLA. He 16 mau ʻoihana PLA i hoʻokomo ʻia i loko o ka hana, i ke kūkulu ʻia ʻana a i hoʻolālā ʻia e kūkulu ʻia ma ka home a ma waho. Ua hoʻokomoʻia ka mana hana i loko o ka hanaʻana o 400,000 tons / makahiki, ka nui ma nā'āina'ē; Ka mana hana o 490,000 tons / makahiki, ka nui o ka home.

Ma ka ʻokoʻa, ma Kina, maʻalahi ka loaʻa ʻana o nā mea maka no ka hana PBAT, a ʻoi aku ka makua o ka ʻenehana hana. ʻO ka nui o ka PBAT a me ka hiki ke kūkulu ʻia he nui. Eia naʻe, hiki ke hoʻolōʻihi ʻia ka ʻokoʻa o ka manawa hoʻokuʻu ikehu o PBAT ma muli o ka piʻi ʻana o ke kumu kūʻai o BDO, a ʻoi aku ka liʻiliʻi o ke kumukūʻai o PBAT i kēia manawa ma mua o PLA.

E like me ka mea i hōʻike ʻia ma ka papa aʻe, ʻo ka PBAT o kēia manawa e kūkulu ʻia nei + kūkulu ʻia i hoʻolālā ʻia e helu ʻia ma muli o ka mana hana o ka hana mua, a me ka mana hana mua, aia paha he 2.141 miliona tons o ka mana hana i ka makahiki 2021. E noʻonoʻo ana i kekahi mau hana mua maoli. ʻAʻole hiki ke hoʻokomo maikaʻi ʻia ka hana, ʻo ka hiki ke hana ma kahi o 1.5 miliona tons.

ʻOi aku ka kiʻekiʻe o ka waiwai kumu o ka PLA ma mua o ka PBAT, akā no ka mea ua hoʻopili mua ʻia nā huahana ʻeke membrane e ke kulekele, ka hopena o ka PBAT i ka pōkole, i ka manawa like, ua piʻi nui ke kumukūʻai o PBAT monomer BDO, ʻo ka pūnaewele nani o kēia manawa ʻulaʻula PBAT. ua wikiwiki e hopu i ke kumukūʻai o PLA.

ʻOiai he aliʻi liʻiliʻi mālie ʻo PLA, ʻoi aku ka paʻa o ke kumukūʻai, ma mua o 30,000 yuan/ton.

ʻO ka mea i luna nei ka hoʻohālikelike maʻamau o nā mea ʻelua. Ke kamaʻilio pū ʻana me nā mea hoʻomohala ʻoihana e pili ana i ke ʻano o nā mea i ʻoi aku ka maikaʻi i ka wā e hiki mai ana, ʻokoʻa nā manaʻo o kēlā me kēia. Manaʻo kekahi poʻe ʻo PLA ka mea nui i ka wā e hiki mai ana.

Manaʻo kekahi poʻe ʻo ka PBAT ka mea nui, no ka mea, no ka mea, ʻo ka PLA ka mea nui mai ka kulina, hiki ke hoʻoponopono ʻia ka pilikia o ka lako kulina? ʻOiai he petrochemical ka PBAT, loaʻa iā ia kekahi mau mea maikaʻi i ke kumu waiwai a me ke kumu kūʻai.

ʻO ka ʻoiaʻiʻo, he ʻohana lākou, ʻaʻohe paio koʻikoʻi, hoʻohana maʻalahi wale nō, e aʻo mai kekahi i kekahi i mea e pāʻani ai i ka mana nui loa!