He aha ke kumu o ka hydroxyethyl cellulose?

ʻO ka Hydroxyethyl cellulose (HEC) he wai-soluble nonionic cellulose ether, a ʻo kāna kumu nui he cellulose maoli. Loaʻa ka cellulose kūlohelohe i nā mea kanu a ʻo ia ka mea nui o nā paia o nā mea kanu. ʻO ka kikoʻī, hana ʻia ka hydroxyethyl cellulose e ka hoʻoheheʻe ʻana i ka cellulose kūlohelohe me ka ethylene oxide ma lalo o nā kūlana alkaline. Kapa ʻia kēia kaʻina hana hoʻololi kemika he ethoxylation, a ʻo ka hopena, ʻo nā pūʻulu hydroxyl ma nā molekole cellulose maoli i hoʻololi ʻia i ʻāpana a i ʻole ke pani piha ʻia e hana i ka hydroxyethyl cellulose me nā hui ethoxy.

Eia nā ʻanuʻu kikoʻī o ka hoʻomākaukau ʻana o ka hydroxyethyl cellulose:

Ke kumu o ka cellulose: Lawe pinepine ʻia ka cellulose mai nā mea kanu e like me ka pulupulu a me ka lāʻau. Hoʻomaʻemaʻeʻia a hoʻomaʻemaʻeʻia ka cellulose i unuhiʻia no ka weheʻana i nā mea haumia e like me ka lignin, hemicellulose a me nā mea'ē aʻe non-cellulose e loaʻa ai ka cellulose maʻemaʻe kiʻekiʻe.

Lapaʻau Alkalinization: Hoʻohui i ka cellulose me ka solution sodium hydroxide (NaOH) concentrated, a hui pū nā hui hydroxyl i cellulose me ka sodium hydroxide e hana i ka sodium cellulose. Ma kēia kaʻina hana, hoʻonui ʻia ke ʻano molekole cellulose i kekahi ʻano, e maʻalahi ke hana me ka ethylene oxide.

Ka hopena o ka Ethoxylation: Hoʻohui ʻia ka sodium cellulose me ka ethylene oxide (C2H4O) ma kahi mahana a me ke kaomi. Wehe ʻia ke apo o ka ethylene oxide e hana i nā hui ethoxy (-CH2CH2OH), e hui pū me nā pūʻulu hydroxyl ma nā molekule cellulose e hana i ka hydroxyethyl cellulose. Hiki ke hoʻokō ʻia kēia kaʻina hana i nā pae like ʻole, ka hopena i ka hydroxyethyl cellulose me nā degere like ʻole o ka hoʻololi.

Ma hope o ka lapaʻau ʻana: ʻO ka huahana ma hope o ka pane ʻana i loaʻa mau i ka alkali unreacted, solvents a me nā huahana ʻē aʻe. I mea e loaʻa ai ka hydroxyethyl cellulose maʻemaʻe, pono nā hana ma hope o ka mālama ʻana e like me ka neutralization, ka holoi ʻana a me ka maloʻo. ʻO ka pahuhopu o kēia mau ʻanuʻu lapaʻau, ʻo ia ka wehe ʻana i ke koena alkali, solvents a me nā huahana e loaʻa ai ka huahana hoʻomaʻemaʻe hope loa.

Ua hoʻohana nui ʻia ʻo Hydroxyethyl cellulose i nā ʻoihana like ʻole ma muli o kāna mau waiwai kemika kūikawā a me ka hana maikaʻi loa. ʻO ka mea kikoʻī, ʻo ka hydroxyethyl cellulose he wai hoʻoheheʻe maikaʻi, mānoanoa, kūpaʻa, hana kiʻiʻoniʻoni a me ka lubricity, a hoʻohana maʻamau ʻia i nā māla aʻe:

Nā mea kūkulu hale: I nā mea kūkulu hale, hoʻohana nui ʻia ka hydroxyethyl cellulose ma ke ʻano he mānoanoa a me ka mea mālama wai no nā mea sima a me nā mea gypsum. Hiki iā ia ke hoʻomaikaʻi maikaʻi i ka hana hana o nā mea, hoʻomaikaʻi i ka paʻa ʻana o ka wai, ka hana a me ka anti-sagging o ka mortar, e hoʻolōʻihi i ka manawa hāmama a hōʻoia i ka holomua o ka hana.

ʻOihana pena: I loko o ka pena, hoʻohana ʻia ka hydroxyethyl cellulose ma ke ʻano he mānoanoa, ka mea hoʻomaha a me ka emulsifier e hoʻomaikaʻi i ka rheology a me ka paʻa o ka pena, e pale i ka hoʻoheheʻe ʻana o ka puaʻa, a hoʻonui i ka palahalaha a me ka nani o ka uhi.

Nā mea hoʻonani a me nā huahana mālama pilikino: I nā mea hoʻonaninani, hoʻohana pinepine ʻia ka hydroxyethyl cellulose ma ke ʻano he mānoanoa, kiʻiʻoniʻoni mua a me ka moisturizer. Hiki iā ia ke hāʻawi i nā huahana me ka manaʻo maikaʻi, hoʻomaikaʻi i ka paʻa o ka huahana a me ka hoʻopili ʻana, a hoʻonui i ka hopena moisturizing.

ʻOihana lāʻau lapaʻau: Ma ke kahua lāʻau lapaʻau, hoʻohana ʻia ka hydroxyethyl cellulose ma ke ʻano he excipient no ka hoʻomākaukau lāʻau. Ma ke ʻano he ʻāpana o nā papa hoʻokuʻu hoʻomau, nā uhi kiʻiʻoniʻoni, a me nā mea ʻē aʻe, hiki iā ia ke kāohi i ka hoʻokuʻu ʻana o nā lāʻau lapaʻau a hoʻomaikaʻi i ka kūpaʻa a me ka bioavailability o nā lāʻau lapaʻau.

ʻOihana meaʻai: I ka ʻoihana meaʻai, hoʻohana ʻia ka hydroxyethyl cellulose ma ke ʻano he mea hoʻohui meaʻai e pāʻani i kahi kuleana i ka mānoanoa, emulsification a me ka hoʻomau. Hoʻohana nui ʻia ia i nā mea inu, condiments, nā huahana waiu a me nā meaʻai ʻē aʻe e hoʻomaikaʻi ai i ke ʻano a me ka ʻono o nā huahana.

He mau noi koʻikoʻi ka Hydroxyethyl cellulose i ka ʻili ʻaila, ka hana pepa, ka paʻi lole a me nā ʻoihana kala. I ka ʻili ʻaila, hoʻohana ʻia ka hydroxyethyl cellulose ma ke ʻano he mānoanoa a me ka stabilizer no ka hoʻoheheʻe wai, hiki ke hoʻomaikaʻi i ka hiki ke hoʻokuʻu ʻia o nā wai wili a pale i ka hiolo ʻana o ka pā. I ka ʻoihana hana pepa, hoʻohana ʻia ia ma ke ʻano he mea paʻa a me ka mea hoʻoikaika e hoʻomaikaʻi i ka ikaika a me ka lōʻihi o ka pepa. I ka paʻi lole a me ke kala ʻana, hoʻohana ʻia ka hydroxyethyl cellulose ma ke ʻano he mānoanoa e kōkua i ka paʻi a me ka slurry dyeing e hoʻohele like ʻia a hoʻomaikaʻi i ka maikaʻi o ka paʻi ʻana a me ke kala.

Loaʻa ka Hydroxyethyl cellulose mai ka cellulose maoli ma o ke ʻano o nā hopena kemika. ʻAʻole wale kāna noi ākea ma muli o kāna mau waiwai kino a me nā kemika, akā no ka mea hiki iā ia ke hāʻawi i nā hoʻonā like ʻole i nā ʻoihana he nui e hoʻokō i nā pono ʻenehana like ʻole.