He aha ka ʻokoʻa ma waena o nā ʻeke ʻeke hoʻoheheʻe ʻia a me nā ʻeke ʻeke piha degradable?

ʻO ka ʻeke ʻeke degradable ʻo ia ka degradable, akā ua māhele ʻia ka ʻeke ʻeke degradable i ʻelua mau ʻano: degradable a piha degradable.ʻO nā ʻeke ʻeke hoʻoheheʻe ʻia e pili ana i ka hoʻohui ʻana i kahi nui o nā mea hoʻohui (e like me ka starch, starch i hoʻololi ʻia a i ʻole cellulose ʻē aʻe, photosensitizers, biodegraders, etc.) degenerate.ʻO nā ʻeke ʻeke hoʻoheheʻe piha ʻia e pili ana i nā ʻeke ʻeke pepa i hoʻohaʻahaʻa loa ʻia i loko o ka wai a me ka carbon dioxide.ʻO ke kumu nui o kēia mea hiki ke hoʻopau ʻia ʻo ia ka hana ʻana i ka kulina a me ka cassava i lactic acid, a i ʻole PLA.
ʻO ka polylactic acid (PLA) kahi matrix biological hou a me nā mea biodegradable hou.Ke hoʻohana nei i ka starch e like me ka mea maka, ka saccharification e loaʻa ai ka glucose, a laila e hoʻoheheʻe i ka glucose a me kekahi mau kānana no ka loaʻa ʻana o ka waikawa lactic maʻemaʻe kiʻekiʻe, a laila synthesizing polylactic acid me kahi kaumaha molekala ma o ka synthesis kemika.Loaʻa iā ia ka biodegradability maikaʻi.Ma hope o ka hoʻohana ʻana, hiki ke hoʻohaʻahaʻa ʻia e nā microorganism i ke ʻano ma lalo o nā kūlana kikoʻī e hoʻohua ai i ka carbon dioxide a me ka wai, ʻaʻole ia e hoʻohaumia i ke kaiapuni.He mea maikaʻi loa ia i ka pale ʻana i ke kaiapuni a he mea pili i ke kaiapuni no nā limahana.
I kēia manawa, ʻo ka mea nui bio-based o ka ʻeke pahu piha degradable i haku ʻia me PLA + PBAT, hiki ke hoʻoheheʻe ʻia i loko o ka wai a me carbon dioxide i loko o 3-6 mau mahina ma lalo o nā kūlana composting (60-70 degere), me ka ʻole o ka hoʻohaumia ʻana i ka wai. kaiapuni.No ke aha e hoʻohui ai i ka PBAT, kahi mea hana ʻoihana o ka hoʻopili maʻalahi, ʻo ka wehewehe ʻana ʻo ka PBAT adipic acid, 1,4-butanediol, terephthalic acid copolymer, ʻoi aku ka nui o ka biodegradable synthetic aliphatic a me ka polymer aromatic Taiwan, PBAT maikaʻi loa ka maʻalahi, hiki ke hana. extrusion kiʻiʻoniʻoni, hana puhi, uhi a me nā hana ʻē aʻe.ʻO ke kumu o ka hui ʻana i ka PLA a me ka PBAT e hoʻomaikaʻi i ka paʻakikī, biodegradability a me ka formability o PLA.ʻAʻole kūpono ʻo PLA a me PBAT kekahi i kekahi, no laila ke koho ʻana i kahi mea hoʻohālikelike kūpono hiki ke hoʻomaikaʻi nui i ka hana o PLA.