He aha ka hydroxyethyl cellulose?

He aha ka hydroxyethyl cellulose?

Hydroxyethyl cellulose (HEC), he melemele keʻokeʻo a ʻeleʻele paha, ʻaʻala ʻole, fibrous a pauda paʻa ʻole, 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 mānoanoa, ka hoʻokuʻu ʻana, ka dispersing, emulsifying, ka hoʻopaʻa ʻana, ka hana kiʻiʻoniʻoni, ka pale ʻana i ka wai a me ka hāʻawi ʻana i nā colloids pale, ua hoʻohana nui ʻia i ka ʻimi ʻaila, nā uhi, ke kūkulu ʻana, ka lāʻau lapaʻau a me ka meaʻai, textiles, papermaking a me polymers. Polymerization a me nā kahua ʻē aʻe.

Hoʻohana nui ʻia ka Hydroxyethyl cellulose i ka ʻoihana uhi. E nānā kākou i ke ʻano o ka hana ʻana i nā coatings:

He aha ka hopena i ka hui ʻana o hydroxyethyl cellulose i nā uhi wai?

Ma ke ʻano he surfactant non-ionic, ʻo ka hydroxyethyl cellulose nā waiwai e pili ana i ka mānoanoa, hoʻopaneʻe, hoʻopaʻa, flotation, hana kiʻiʻoniʻoni, hoʻopuehu, mālama wai a hāʻawi i nā colloids pale:

Hiki ke hoʻoheheʻe ʻia ʻo HEC i ka wai wela a i ʻole ka wai anuanu, ʻaʻole e hoʻoheheʻe ʻia i ka wela kiʻekiʻe a i ʻole ka paila ʻana, e hana ana i kahi ākea o ka solubility a me nā ʻano viscosity, a me ka gelling non-thermal;

ʻO ka paʻa wai paʻa ʻelua ʻelua o ka methyl cellulose, a ʻoi aku ka maikaʻi o ka hoʻoponopono kahe ʻana;

Hiki i ka non-ionic pono'ī ke noho pū me ka nui o nā polymers hiki ke hoʻoheheʻe ʻia i ka wai, surfactants, a me nā paʻakai, a he mea hoʻonaninani colloidal maikaʻi loa i loaʻa nā hopena electrolyte kiʻekiʻe;

Hoʻohālikelike ʻia me ka methyl cellulose i ʻike ʻia a me ka hydroxypropyl methyl cellulose, ka hiki ke hoʻopuehu oHECʻoi aku ka maikaʻi loa, akā ʻoi aku ka ikaika o ka colloid pale.

No ka mea, ʻo ka hydroxyethyl cellulose i mālama ʻia i ka ʻili he pauka a i ʻole fibrous paʻa, hoʻomanaʻo ʻo Shandong Heda iā ʻoe e hoʻolohe i kēia mau mea i ka wā e hoʻomākaukau ai i ka waiʻona makuahine hydroxyethyl cellulose:

(1) Ma mua a ma hope o ka hoʻohui ʻana i ka hydroxyethyl cellulose, pono e hoʻoulu ʻia a hiki i ka ʻike a maopopo loa ka hopena.

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

(3) ʻO ka mahana o ka wai a me ka waiwai pH o ka wai he pili maopopo i ka hoʻoheheʻe ʻana o ka hydroxyethyl cellulose, no laila pono e nānā pono iā ia.

(4) Mai hoʻohui i kekahi mau mea alkaline i ka hui ʻana ma mua o ka hoʻopiha ʻia ʻana o ka pauka hydroxyethyl cellulose me ka wai. ʻO ka hoʻonui ʻana i ka pH wale nō ma hope o ka pulu ʻana e kōkua i ka hemo ʻana.

(5) E like me ka hiki, e hoʻohui i ka antifungal agent ma mua.

(6) I ka wā e hoʻohana ai i ka hydroxyethyl cellulose kiʻekiʻe-viscosity, ʻaʻole pono ke kiʻekiʻe o ka waiʻona makuahine ma mua o 2.5-3% (ma ke kaupaona), inā ʻaʻole paʻakikī ke mālama ʻia ka waiʻona makuahine.