ʻO ka Hydroxyethylcellulose (HEC) he polymer hiki ke hoʻohana nui ʻia i nā huahana ʻoihana a me nā mea kūʻai aku i kēlā me kēia lā, ʻoi aku hoʻi i nā huahana mālama pilikino a me nā mea holoi. Loaʻa iā ia ka mānoanoa maikaʻi, hoʻokuʻu, emulsifying, hana kiʻiʻoniʻoni a me nā hana colloid pale, no laila e hoʻohana pinepine ʻia e like me kahi mānoanoa i ka kopa wai.
1. Ka hale a me nā waiwai o ka hydroxyethyl cellulose
ʻO ka HEC kahi derivative nonionic i loaʻa mai ka cellulose ma o ka hopena etherification a he ikaika hydration ikaika a me ka hydrophilicity. ʻO ke kaulahao mole o HEC he nui nā pūʻulu hydroxyethyl e pani ana i nā ʻātoma hydrogen o ka cellulose maoli, e hana ana i kahi ʻano o nā hale molekala lōʻihi. Hāʻawi kēia ʻano molekala iā HEC e pehu koke i loko o ka wai e hana i kahi hopena viscous like.
ʻO kahi waiwai koʻikoʻi o HEC ka hiki ke hoʻololi i nā waiwai pH like ʻole. Mālama ʻo ia i kona hopena mānoanoa ma luna o kahi ākea pH ākea, hāʻawi iā ia i kahi pōmaikaʻi nui i nā huahana e like me nā kopa wai, he nui nā mea hana a me nā loli pH. Eia kekahi, he biocompatibility maikaʻi a me ka palekana ʻo HEC, a kūpono no ka hoʻohana ʻana i nā huahana like ʻole e pili ana i ke kino o ke kanaka, e like me ke kopa wai, shampoo, etc.
2. Mānoanoa o ka hydroxyethyl cellulose i loko o ke kopa wai
I loko o nā ʻano kopa wai, ʻo ka hana nui o ka HEC ma ke ʻano he mānoanoa e hoʻonui i ka viscosity o ke kopa wai ma ka hoʻoheheʻe ʻana i ka wai e hana i kahi hopena viscous. ʻO ke kikoʻī, ke hoʻoheheʻe ʻia ʻo HEC i ka wai, hui pū kona mau kaulahao molekala me nā molekole wai ma o nā paʻa hydrogen intermolecular e hana i kahi ʻōnaehana paʻakikī. Hiki i kēia ʻōnaehana pūnaewele ke hoʻopaʻa pono i ka nui o nā mole wai, a laila e hoʻonui nui i ka viscosity o ka hopena.
Pili loa ka hopena mānoanoa o HEC i kona kaumaha molekala a me ka nui hoʻohui. ʻO ka ʻōlelo maʻamau, ʻoi aku ka nui o ke kaumaha molekala o HEC, ʻoi aku ka kiʻekiʻe o ka viscosity o ka hopena i hana ʻia; i ka manawa like, ʻoi aku ka kiʻekiʻe o ka manaʻo o HEC i ka hopena, ʻoi aku ka maopopo o ka hopena mānoanoa. Eia nō naʻe, i nā hoʻohana pono, ʻoi aku ka kiʻekiʻe o ka HEC noʻonoʻo hiki ke hoʻololi i ka hoʻonā a hoʻopilikia i ka ʻike mea hoʻohana, no laila pono e mālama pono ʻia i ka wā hoʻolālā.
3. Nā pono o ka hopena mānoanoa HEC
He mau pono koʻikoʻi ko HEC ma mua o nā mānoanoa ʻē aʻe. ʻO ka mea mua, he wai hoʻoheheʻe maikaʻi loa ia a hiki ke hoʻoheheʻe koke i ke anuanu a i ʻole ka wai wela a hana i kahi hopena viscous like. ʻO ka lua, ʻaʻole mānoanoa wale ʻo HEC i nā haʻahaʻa haʻahaʻa, akā hāʻawi pū kekahi i kahi hopena mānoanoa paʻa, ʻo ia ka mea nui i nā huahana kopa wai e pono ai ka mālama lōʻihi. ʻO ke kolu, ma ke ʻano he mānoanoa non-ionic, hiki i ka HEC ke mālama i ka viscosity paʻa ma lalo o nā kūlana pH like ʻole a ʻaʻole maʻalahi i nā mea ʻē aʻe o ka ʻōnaehana.
4. Ka hoʻohana ʻana o ka HEC i ka hoʻokumu ʻana i ke kopa wai
I ka hana maoli, hoʻohui pinepine ʻia ʻo HEC i nā ʻano kopa wai ma ke ʻano pauka. I mea e hōʻoia ai i hiki i ka HEC ke hoʻopau piha a hoʻokō i kona hopena mānoanoa, pono pono e hoʻolohe i ke kūlike o ka hui ʻana i ka wā e hoʻohui ai i ka HEC e pale i ka agglomeration. Eia kekahi, i mea e hoʻonui ai i ka hana o ke kopa wai, hoʻohana pinepine ʻia ʻo HEC me nā mea mānoanoa ʻē aʻe, humectants a i ʻole surfactants e hoʻokō i ke ʻano huahana kūpono a me ka ʻike mea hoʻohana.
Ma ke ʻano he mānoanoa kūpono, ʻo ka hydroxyethyl cellulose ka loaʻa ʻana o ka noi ākea i ke kopa wai. Hiki iā ia ke hoʻonui nui i ka viscosity o ka huahana a hoʻomaikaʻi i ka ʻike mea hoʻohana. Loaʻa iā ia ka hoʻohālikelike maikaʻi a me ke kūpaʻa a he koho maikaʻi loa ia no ke kopa wai mānoanoa.
Ka manawa hoʻouna: ʻAukake-19-2024