He aha nā ʻeke plastik biodegradable?
ʻO nā ʻeke plastik biodegradable he mau ʻeke plastik maikaʻi e hoʻohaʻahaʻa i loko o ka wai a me ke kalapona dioxide ma o ka hana microbial i nā kūlana compost, me ka ʻole o ka hoʻohaumia ʻana i ka lepo a i ʻole ka pollution lua. ʻO nā mea maʻamau i hoʻohana ʻia i ka hana ʻana:
PBAT (polybutylene adipate/terephthalate), PLA (polylactic acid), PCL (polycaprolactone), PHA (polyhydroxyalkanoate), a me nā polymers biodegradable ʻē aʻe.
He aha nā kūlana e hoʻohaʻahaʻa ai nā ʻeke biodegradable? He aha nā kūlana no ka hoʻohaʻahaʻa?
Hoʻohaʻahaʻa ma lalo o nā kūlana compost
Nā kūlana compost: ʻO ka wai ma luna o 95%, ka lepo, ka mahana (28-58 degere ), a me nā microorganism kikoʻī.
He aha nā ʻeke plastik semi-degradable?
ʻO nā mea e hoʻohaʻahaʻa wale i nā ʻāpana liʻiliʻi a ʻaʻole hiki ke hoʻololi ʻia i wai a me carbon dioxide i loko o ka manawa i ʻōlelo ʻia. Hoʻohui ʻia nā mea hiki ke paʻi kiʻi (e like me d2W a me P-Life) i ka 1-2% o kahi mea hana photooxidative i nā mea PE kuʻuna. Aia kekahi mau mea i hui pū ʻia me ka PE a me ka starch, kahi e hoʻohaʻahaʻa ʻia ai ka ʻāpana starch, akā ʻaʻole hiki ke hoʻohaʻahaʻa ʻia ke koena PE.
He aha ka hapa o nā ʻeke plastik biodegradable?
Wahi a EU a me nā kūlana aupuni, ʻoi aku ma mua o 90% o nā ʻāpana resin e pono e biodegraded i ka wai a me ka carbon dioxide.
He aha ka ʻokoʻa ma waena o nā ʻeke biodegradable a me nā ʻeke plastik maʻamau? Pehea e ʻike ai?
Ma waho aʻe o ka composting, loaʻa nā ʻano hana ʻike wikiwiki:
Infrared spectroscopy (ka hoʻohālikelike ʻana i nā hale molekala) e ʻike koke i ke ʻano o nā ʻeke plastik
ʻO ka pyrolysis kemika (hiki ke hoʻoheheʻe ʻia nā mea biodegradable ma lalo o nā kūlana alkaline wela, ʻoiai ʻaʻole e pau nā ʻeke plastik maʻamau)
He aha ke ola o nā ʻeke biodegradable?
12 mau mahina ma ke kūlana sila (pale ʻia mai ka makū, lepo, kukui, a me nā mea ʻē aʻe)
He aha ka PLA a he aha ka PBAT?
He polymer ka PLA i hana ʻia e ka hoʻololi ʻana i ka starch i nā monomers lactic acid ma o ka fermentation, a laila hoʻohui ʻia i loko o ka polylactic acid.
ʻO ka PBAT he polymer i hana ʻia e ke kinikini polymerizing adipic acid, terephthalic acid, a me butanediol.
Hiki i nā mea ʻelua ke biodegrade i loko o ka wai a me carbon dioxide i nā kūlana compost.
No ke aha e hoʻohui ai i ka PBAT?
Hiki i ka PBAT ke hoʻololi maikaʻi, ka hana, a me ke kū'ē i ke kiʻekiʻe a me ka haʻahaʻa haʻahaʻa, hiki ke hoʻokō i nā pono o nā noi kiʻiʻoniʻoni. Eia hou, loa'a nui ka PBAT, ma'alahi i ka hana nui-a me ka ha'aha'a-kuai, no laila, he huahana maika'i loa ia e pani i nā mea polyolefin.
