Gịnị bụ hydroxyethyl cellulose?

Gịnị bụ hydroxyethyl cellulose?

Haịdroxyethyl cellulose (HEC), odo ọcha ma ọ bụ nke na-acha ọcha, nke na-enweghị isi, nke na-anaghị egbu egbu ma ọ bụ nke nwere ntụ ntụ, nke e ji etherification nke alkaline cellulose na ethylene oxide (ma ọ bụ chlorohydrin) kwadebe, nke sitere na ụdị selulose ethers nke Nonionic soluble. N'ihi na HEC nwere ezigbo ihe onwunwe dịka ịka nká, nkwụsịtụ, ịgbasa, emulsifying, njikọta, imepụta ihe nkiri, ichebe mmiri na inye colloids nchebe, ejirila ya mee ihe nke ukwuu na nchọpụta mmanụ, mkpuchi, owuwu, ọgwụ na nri, ákwà, ime akwụkwọ na polymers. Polymerization na ubi ndị ọzọ.

A na-ejikarị hydroxyethyl cellulose eme ihe n'ọtụtụ ebe n'ime ụlọ ọrụ mkpuchi. Ka anyị leba anya n'otú o si arụ ọrụ na mkpuchi:

Kedu ihe na-eme ma hydroxyethyl cellulose zute ihe mkpuchi mmiri?

Dịka ihe na-adịghị eme ka ihe dị n'ime mmiri na-abụghị ionic, hydroxyethyl cellulose nwere ihe ndị a na mgbakwunye na ịka njọ, nkwụsịtụ, ijikọ, flotation, ịmepụta ihe nkiri, ịgbasa, idobe mmiri na inye colloids nchebe:

A na-agbaze HEC n'ime mmiri ọkụ ma ọ bụ mmiri oyi, ọ naghịkwa agbapụta n'oge okpomọkụ dị elu ma ọ bụ mgbe ọ na-esi mmiri, nke na-eme ka o nwee ọtụtụ njirimara ịgbaze na viscosity, yana gelling na-abụghị okpomọkụ;

Ike nchekwa mmiri dị okpukpu abụọ karịa nke methyl cellulose, ọ na-achịkwakwa mmiri nke ọma;

Enweghị ionic n'onwe ya nwere ike ibikọ ọnụ na ọtụtụ polymers ndị ọzọ na-agbaze mmiri, surfactants, na nnu, ọ bụkwa ezigbo ihe mkpuchi colloidal nke nwere ngwọta electrolyte dị elu;

Ma e jiri ya tụnyere methyl cellulose na hydroxypropyl methyl cellulose a ma ama, ikike ịgbasa nkeHECbụ nke kacha njọ, mana ikike nchekwa colloid kachasị ike.

Ebe ọ bụ na hydroxyethyl cellulose nke a na-agwọ n'elu bụ ihe siri ike ma ọ bụ nke nwere eriri, Shandong Heda na-echetara gị ka ị ṅaa ntị n'ihe ndị a mgbe ị na-akwadebe mmanya nne hydroxyethyl cellulose:

(1) Tupu e tinye hydroxyethyl cellulose na mgbe e tinyere ya, a ga-anọgide na-agwakọta ya ruo mgbe mmiri ahụ ga-apụta ìhè ma doo anya nke ọma.

(2) A ga-eji nwayọ gwakọta ya n'ime gbọmgbọm ngwakọta ahụ, ejikọkwala hydroxyethyl cellulose na hydroxyethyl cellulose ozugbo n'ime gbọmgbọm ngwakọta ahụ n'ọtụtụ buru ibu ma ọ bụ n'ụdị akpụ na bọọlụ.

(3) Okpomọkụ mmiri na uru pH nke mmiri nwere njikọ doro anya na mgbasa nke hydroxyethyl cellulose, yabụ a kwesịrị ilebara ya anya nke ọma.

(4) Etinyela ihe alkaline n'ime ngwakọta ahụ tupu e tinye ntụ hydroxyethyl cellulose na mmiri. Ịbawanye pH naanị mgbe mmiri batara ga-enyere aka ịgbaze.

(5) Dịka o kwere mee, tinye ọgwụ nje tupu oge eruo.

(6) Mgbe a na-eji hydroxyethyl cellulose nke nwere oke viscosity, oke nke mmanya nne ekwesịghị ịdị elu karịa 2.5-3% (site na ibu), ma ọ bụghị ya, ọ ga-esiri ike ijikwa mmanya nne.