He aha ka hydroxyethyl cellulose?

He aha ka hydroxyethyl cellulose?

ʻO ka Hydroxyethyl cellulose (HEC), he keʻokeʻo a melemele paha, ʻala ʻole, ʻaʻohe ʻawaʻawa fibrous a pauka paʻa paha, i hoʻomākaukau ʻia e ka etherification o ka cellulose alkaline a me ka ethylene oxide (a i ʻole chlorohydrin), no ka genus Nonionic soluble cellulose ethers. No ka mea he mau waiwai maikaʻi ko HEC e like me ka hoʻomānoanoa, ka hoʻokuʻu ʻana, ka hoʻopuehu ʻana, ka emulsifying, ka hoʻopaʻa ʻana, ka hana ʻana i nā kiʻiʻoniʻoni, ka pale ʻana i ka makū a me ka hāʻawi ʻana i nā colloids pale, ua hoʻohana nui ʻia ia i ka ʻimi ʻaila, nā uhi, ke kūkulu ʻana, ka lāʻau lapaʻau a me ka meaʻai, nā lole, ka hana pepa a me nā polymers. Polymerization a me nā kahua ʻē aʻe.

Hoʻohana nui ʻia ka Hydroxyethyl cellulose i ka ʻoihana uhi. E nānā kākou pehea e hana ai i nā uhi:

He aha ka mea e hana ai ke hui ka hydroxyethyl cellulose me nā uhi wai?

Ma ke ʻano he surfactant non-ionic, loaʻa i ka hydroxyethyl cellulose nā waiwai aʻe ma waho aʻe o ka hoʻomānoanoa, ka hoʻokuʻu ʻana, ka nakinaki ʻana, ka flotation, ka hana ʻana i nā kiʻiʻoniʻoni, ka hoʻopuehu ʻana, ka paʻa ʻana o ka wai a me ka hāʻawi ʻana i nā colloids pale:

Hiki ke hoʻoheheʻe ʻia ʻo HEC i ka wai wela a anu paha, a ʻaʻole e hoʻopūʻiwa i ka mahana kiʻekiʻe a i ʻole ka paila ʻana, e loaʻa ai iā ia kahi ākea o nā ʻano solubility a me ka viscosity, a me ka gelling non-thermal;

ʻOi aku ka pālua o ka hiki ke paʻa i ka wai ma mua o ka methyl cellulose, a ʻoi aku ka maikaʻi o ke kaʻina hana o ke kahe ʻana;

Hiki i ka non-ionic ponoʻī ke noho pū me kahi ākea o nā polymers wai-soluble ʻē aʻe, nā surfactants, a me nā paʻakai, a he mea hoʻomānoanoa colloidal maikaʻi loa e loaʻa ana nā hopena electrolyte kiʻekiʻe-hui;

Ke hoʻohālikelike ʻia me ka methyl cellulose i ʻike ʻia a me ka hydroxypropyl methyl cellulose, ʻo ka hiki ke hoʻopuehu oHECʻo ia ka mea ʻino loa, akā ʻo ka hiki ke colloid pale ka mea ikaika loa.

ʻOiai he pauka a fibrous paha ka hydroxyethyl cellulose i mālama ʻia ma ka ʻili, hoʻomanaʻo ʻo Shandong Heda iā ʻoe e hoʻolohe i nā mea aʻe i ka wā e hoʻomākaukau ai i ka wai ʻona makuahine hydroxyethyl cellulose:

(1) Ma mua a ma hope o ka hoʻohui ʻana i ka hydroxyethyl cellulose, pono e hoʻomau ʻia ka hoʻoulu ʻana a hiki i ka moakāka loa ʻana o ka wai.

(2) Pono e kānana mālie ʻia i loko o ka pahu kāwili, a mai hoʻopili pololei i ka hydroxyethyl cellulose a me ka hydroxyethyl cellulose i loko o ka pahu kāwili i nā nui he nui a i ʻole ma ke ʻano o nā puʻupuʻu a me nā pōpō.

(3) He pilina maopopo ko ka mahana o ka wai a me ka waiwai pH o ka wai i ka hoʻoheheʻe ʻia ʻana o ka hydroxyethyl cellulose, no laila e pono e uku ʻia ka nānā kūikawā iā ia.

(4) Mai hoʻohui i kekahi mau mea alkaline i ka hui ʻana ma mua o ka hoʻomoʻa ʻia ʻana o ka pauka hydroxyethyl cellulose me ka wai. ʻO ka hoʻokiʻekiʻe ʻana i ka pH ma hope o ka pulu ʻana e kōkua i ka hoʻoheheʻe ʻana.

(5) I ka hiki ʻana, e hoʻohui i ka mea antifungal ma mua.

(6) I ka wā e hoʻohana ai i ka hydroxyethyl cellulose viscosity kiʻekiʻe, ʻaʻole pono e ʻoi aku ka nui o ka waiʻona makuahine ma mua o 2.5-3% (ma ke kaumaha), inā ʻaʻole paʻakikī ka lawelawe ʻana i ka waiʻona makuahine.