Pehea ka hopena o ka hydroxyethyl cellulose i ka viscosity?

ʻO ka Hydroxyethyl cellulose (HEC)He polymer nonionic, wai-soluble i hana ʻia mai ka cellulose kūlohelohe ma o ka etherification. No ka mea, hana ia i kahi hopena colloidal maopopo a paʻa i ka wā e hoʻoheheʻe ʻia ai i ka wai, hoʻohana nui ʻia ia i nā uhi, nā kemika hale, nā mea kūkulu hale, ka ʻeli ʻaila, a me nā ʻoihana ʻē aʻe. ʻO ka hopena o HEC i ka viscosity o ka ʻōnaehana kekahi o kāna mau hana koʻikoʻi loa, a pili kēia mana i nā kumu he nui, me ke ʻano molekala, ka solubility, a me nā kūlana o waho.

1. Pilina ma waena o ke ʻano Molekala a me ka Viscosity

ʻO ke kaulahao nui o HEC he iwi kuamoʻo cellulose i hoʻopili ʻia e nā pilina β-1,4-glucose, me nā hui hydroxyl ma nā ʻāpana glucose i pani ʻia e nā hui hydroxyethyl. ʻO ke kekelē o ka pani ʻana (DS) a me ka pani molar (MS) e hoʻoholo i ka solubility o ka mole i ka wai a me ka maʻalahi o nā ʻāpana kaulahao. ʻO nā kaulahao molekala lōʻihi (ke kaumaha molekala kiʻekiʻe) a me ke kekelē waena o ka pani ʻana e hopena i nā hihia hou aʻe ma hope o ka hydration, e hoʻonui nui ana i ka viscosity o ka ʻōnaehana. Hoʻopuka ka HEC kaumaha molekala kiʻekiʻe i ka viscosity kiʻekiʻe ma mua o nā ʻano kaumaha molekala haʻahaʻa ma ka nui like.

2. Hoʻopilikia nā kaʻina hana hoʻoheheʻe a me ka hydration i ka Viscosity

ʻO ke kaʻina hana hoʻoheheʻe ʻana o HEC i loko o ka wai e pili ana i ʻekolu mau pae: ka hoʻomaʻū ʻana, ka hoʻopuehu ʻana, a me ka hydration. Ke hoʻopili ʻia ka pauka HEC me ka wai, omo koke ka papa waho i ka wai a hoʻonui e hana i kahi kiʻiʻoniʻoni, a ukali ʻia e ka hydration mālie o ka papa o loko. Ma hope o ka hydration piha, hoʻopuehu like ʻia nā molekala kaulahao lōʻihi i loko o ka wai, e hana ana i kahi hopena me kahi ʻano pūnaewele spatial e keʻakeʻa ana i ke kahe o nā molekala wai, a laila e hoʻonui ana i ka viscosity o ka hopena. Inā ʻaʻole piha ka hoʻoheheʻe ʻana a i ʻole ka agglomeration, ʻaʻole i wehe piha ʻia nā kaulahao molekala, e hopena ana i ka viscosity haʻahaʻa.

3. Pilina ma waena o ka Hoʻohuihui a me ka Viscosity

Ma ka pae haʻahaʻa o ka hoʻohuihui ʻana, piʻi ka mānoanoa HEC ma kahi linear me ka piʻi ʻana o ka hoʻohuihui ʻana. Ke hiki ka hoʻohuihui ʻana i ka hoʻohuihui ʻana o ka hoʻopili koʻikoʻi, ʻoi aku ka nui o nā hoʻopili ʻana ma waena o nā kaulahao molekala, a piʻi nui ka mānoanoa. Hiki i nā hoʻohuihui kiʻekiʻe loa ke hana i ka hopena e hōʻike i kahi kūlana gel-like, e hōʻemi nui ana i ka wai. No laila, i nā noi hana, pono e koho ʻia ka dosage kūpono e pili ana i nā koi ʻōnaehana e hoʻokō ai i ka mānoanoa i makemake ʻia.

4. Nā hopena o nā kūlana o waho ma ka viscosity

Mahana: Ke emi nei ka mānoanoa o nā hopena HEC me ka piʻi ʻana o ka mahana. ʻO kēia no ka mea hoʻoikaika nā mahana kiʻekiʻe i ka neʻe wela o nā kaulahao molekala, e hōʻemi ana i ke kūpaʻa o ka papa hydration. pH: Paʻa ka mānoanoa o HEC i loko o ka pae pH o 2-12, akā hiki i nā kūlana waikawa a me ka alkaline koʻikoʻi ke hoʻopilikia i nā kaulahao molekala, e alakaʻi ana i ka emi ʻana o ka mānoanoa.

Nā Paʻakai a me nā Mea Hoʻoheheʻe: Ma ke ʻano he polymer nonionic, paʻa loa ʻo HEC i ke alo o nā electrolytes. Eia nō naʻe, hiki i nā kiʻekiʻe o ka paʻakai a i ʻole nā ​​​​mea hoʻoheheʻe organik ke hoʻopilikia i ka hydration, a laila e hōʻemi ana i ka viscosity.

5. Ka Mana ʻAna o ka Viscosity ma nā ʻōnaehana like ʻole

ʻOihana Uhi: Hāʻawi ʻo HEC i ka viscosity noi kūpono a me nā waiwai pae i nā pena latex, e pale ana i ka pigment a me ka hoʻopili ʻana o ka mea hoʻopihapiha.
Nā Kemika o ka Hale: I loko o ka shampoo a me ke kopa lima, hāʻawi ʻo HEC i kahi ʻano siliki a hoʻopaʻa i ka huʻa.
Nā Mea Hana Hale: I loko o ka sima sima, hāʻawi ʻo HEC i ka paʻa ʻana o ka wai a me ke kūlike, e hoʻomaikaʻi ana i ka hana noi.
ʻEli ʻAila: Hoʻohana ʻia ʻo HEC i nā wai ʻeli e hoʻoponopono i ka rheology a hoʻonui i ka hiki ke lawe i ka chip.

Hoʻonui nui ka Hydroxyethyl cellulose i ka viscosity o ka ʻōnaehana ma o ka hydration, entanglement, a me ka hoʻokumu ʻana o ka pūnaewele spatial o kāna mau molekala kaulahao lōʻihi i ka wai. ʻAʻole pili wale ka viscosity i ke kaumaha molekala o HEC, ke kekelē o ka hoʻololi ʻana, a me ka noʻonoʻo ʻana, akā ua hoʻopilikia pū ʻia e ka mahana, pH, a me ka haku mele ʻana o ka ʻōnaehana. I ka hoʻolālā ʻana i ka formulation,ke koho pono ʻana i ke ʻano HECa ʻo ka dosage e ʻae ai i ka kaohi pololei o nā waiwai rheological huahana, e hoʻokō ana i nā hopena like ʻole mai ka lahilahi a i ka mānoanoa.