He aha ka ʻokoʻa ma waena o ka ʻeke biodegradable a me ka ʻeke biodegradable piha

ʻO nā ʻeke ʻeke degradable, hiki ke hoʻohaʻahaʻa ʻia ka manaʻo, akā ua māhele ʻia nā ʻeke ʻeke degradable i "degradable" a me "degradable piha" ʻelua. ʻO ka ʻeke ʻeke degradable e pili ana i ke kaʻina hana e hoʻohui i kahi nui o nā mea hoʻohui (e like me ka starch, starch i hoʻololi ʻia a i ʻole cellulose ʻē aʻe, photosensitizer, biodegradative agent, a me nā mea ʻē aʻe), i mea e paʻa ai ka ʻeke ʻeke plastik, a laila hoʻohālikelike i ka maʻalahi. hoʻohaʻahaʻa i ke ʻano kūlohelohe. ʻO ka ʻeke ʻeke hoʻoheheʻe piha ʻia e pili ana i ka ʻeke ʻeke plastik i hoʻohaʻahaʻa loa ʻia i loko o ka wai a me ka carbon dioxide. ʻO ke kumu nui o kēia mea hiki ke hoʻoheheʻe ʻia e hana ʻia i lactic acid, ʻo ia hoʻi ka PLA, mai ke kulina a me ka ʻoki.

ʻO ka polylactic acid (PLA) kahi ʻano hou o ka substrate biological a me nā mea biodegradable hou. Loaʻa ka Glucose mai ka starch maka mea ma ka saccharification, a laila ʻo ka lactic acid me ka maʻemaʻe kiʻekiʻe e fermented mai ka glucose a me kekahi mau kānana, a laila hoʻohui ʻia ka polylactic acid me kekahi kaumaha molekala e ka synthesis kemika. He biodegradability maikaʻi ia, a hiki ke hoʻohaʻahaʻa loa ʻia e nā microorganism i ke ʻano ma lalo o nā kūlana kikoʻī ma hope o ka hoʻohana ʻana, a ma hope e hoʻopuka i ke kalapona 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 nā mea bio-based nui o nā ʻeke hoʻopiha piha degradable i haku ʻia me PLA + PBAT, hiki ke hoʻopau piha ʻia i loko o ka wai a me carbon dioxide i loko o 3-6 mau mahina ma lalo o ke ʻano o ka composting (60-70 degere), me ka ʻole o ka pollution. i ke kaiapuni. No ke aha e hoʻohui ai i ka PBAT, ka mea hana ʻoihana o ka hoʻopili maʻalahi, ma lalo o 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 nā polymers aromatic, PBAT maikaʻi loa ka maʻalahi, hiki ke hana i ka extruding kiʻiʻoniʻoni. , ka puhi ʻana i ka hana, ka uhi ʻana a me nā hana ʻē aʻe. ʻO ke kumu o ka hui ʻana o PLA a me PBAT ʻo ia ka hoʻomaikaʻi ʻana i ka paʻakikī, biodegradation a me nā waiwai hoʻoheheʻe o PLA. ʻAʻole kūpono ʻo PLA a me PBAT, no laila hiki ke hoʻomaikaʻi maikaʻi ʻia ka hana o PLA ma ke koho ʻana i nā mea hoʻohālikelike kūpono.