Hydroxyethyl cellulose (HEC) bụ ihe na-acha ọcha ma ọ bụ odo odo dị mfe, enweghị isi, ọ naghị egbu egbu ma ọ bụ ihe na-egbu egbu nke nwere ntụ ntụ. E ji owu a na-anaghị amị amị ma ọ bụ pulp a nụchara anụcha mee ya, nke e tinyere na soda caustic mmiri mmiri 30%. Mgbe ọkara awa gachara, a na-ewepụ ya ma pịa ya. Pịa ya ruo mgbe oke mmiri alkaline ruru 1:2.8, wee gwerie ya. A na-akwadebe ya site na mmeghachi omume etherification ma bụrụ nke cellulose ethers na-anaghị agbaze na ionic. Hydroxyethyl cellulose bụ ihe dị mkpa na agba latex. Ka anyị lekwasị anya n'otu esi eji hydroxyethyl cellulose HEC na agba latex na ihe ndị a na-eme iji gbochie ya.
1. Ejiri ihe ọṅụṅụ nne mee ya maka ojiji: buru ụzọ jiri hydroxyethyl cellulose HEC kwadebe ihe ọṅụṅụ nne nwere oke njupụta, wee tinye ya na ngwaahịa ahụ. Uru nke usoro a bụ na ọ nwere ike ịgbanwe agbanwe ma enwere ike itinye ya ozugbo na ngwaahịa emechara, mana a ga-echekwa ya nke ọma. Usoro nke usoro a yiri ọtụtụ usoro dị na usoro nke abụọ; ihe dị iche bụ na ọ dịghị mkpa maka ihe na-akpali akpali dị elu, naanị ụfọdụ ihe na-akpali akpali nwere ike zuru oke iji mee ka hydroxyethyl cellulose gbasaa n'otu n'otu na ngwọta ahụ ka enwere ike ịga n'ihu na-akwụsịghị agwakọta ruo mgbe ọ ga-agbaze kpamkpam ka ọ bụrụ ihe ngwọta viscous. Agbanyeghị, a ghaghị ịmara na a ga-etinye ihe na-egbu egbu na ihe ọṅụṅụ nne ozugbo enwere ike.
2. Tinye ya ozugbo n'oge mmepụta: usoro a bụ nke kachasị mfe ma na-ewe oge kacha nta. Tinye mmiri dị ọcha na nnukwu bọket nwere igwekota ihe dị elu. Malite ịkpalite ya mgbe niile na obere ọsọ ma jiri nwayọ gwakọta hydroxyethyl cellulose n'ime ngwọta ahụ nke ọma. Gaa n'ihu na-akpali ya ruo mgbe ihe niile ga-amịkọrọ mmiri. Mgbe ahụ tinye ihe nchekwa na ihe mgbakwunye dị iche iche. Dị ka agba, ihe enyemaka mgbasa, mmiri ammonia, wdg. Gwakọta ya ruo mgbe hydroxyethyl cellulose HEC niile gbazere kpamkpam (viscosity nke ngwọta ahụ na-abawanye nke ọma) wee tinye ihe ndị ọzọ na usoro maka mmeghachi omume.
Ebe ọ bụ na hydroxyethyl cellulose HEC nke a na-agwọ n'elu ya bụ ntụ ntụ ma ọ bụ fibrous siri ike, mgbe ị na-akwadebe hydroxyethyl cellulose nne mmanya, ṅaa ntị n'ihe ndị a:
(1) Mgbe a na-eji hydroxyethyl cellulose HEC nke nwere oke viscosity, oke nke mmanya nne ekwesịghị ịdị elu karịa 2.5-3% (site na ibu), ma ọ bụghị ya, mmanya nne nne ga-esiri ike ijikwa.
(2) Tupu na mgbe etinyere hydroxyethyl cellulose HEC, a ga-akpali ya mgbe niile ruo mgbe ngwọta ahụ ga-apụta ìhè ma doo anya nke ọma.
(3) Dịka o kwere mee, tinye ọgwụ nje tupu oge eruo.
(4) Okpomọkụ mmiri na uru pH nke mmiri nwere njikọ doro anya na mgbasa nke hydroxyethyl cellulose, yabụ a kwesịrị ilebara anya nke ọma.
(5) Etinyela ihe alkaline n'ime ngwakọta ahụ tupu e tinye ntụ hydroxyethyl cellulose na mmiri. Ịbawanye pH mgbe e risịrị ya ga-enyere aka ịgbaze.
(6) A ga-eji nwayọ nwayọ wụsa ya n'ime tankị ngwakọta ahụ, etinyekwala nnukwu ọnụọgụ ma ọ bụ tinye hydroxyethyl cellulose nke kpụrụ akpụ na bọọlụ ozugbo n'ime tankị ngwakọta ahụ.
Ihe dị mkpa na-emetụta viscosity nke agba latex:
(1) Ncha nke ihe na-eme ka ihe dị arọ sie ike site na nje ndị dị ndụ.
(2) N'usoro imepụta agba, ma usoro nzọụkwụ nke itinye ihe na-eme ka ihe dị arọ kwesịrị ekwesị.
(3) Ma ọnụọgụ ihe na-eme ka ihe na-agba agba na mmiri e ji mee ihe n'ime usoro agba ahụ hà kwesịrị ekwesị.
(4) Oke nke ọnụọgụ nke ihe ndị ọzọ na-eme ka ihe sie ike n'okike na ọnụọgụ nke hydroxyethyl cellulose dị na nhazi agba.
(5) Mgbe e mepụtara latex, ihe dị n'ime ihe ndị na-eme ka ihe na-akpali akpali na oxides ndị ọzọ dị na ya.
(6) Okpomọkụ dị oke elu n'oge mgbasa n'ihi oke mkpali.
(7) Ka afụfụ ikuku na-anọgide na agba ahụ, otú ahụ ka ọ na-eme ka viscosity ya dịkwuo elu.
Ọbara nke hydroxyethyl cellulose HEC na-agbanwe ntakịrị na oke pH nke 2-12, mana viscosity na-ebelata karịa oke a. O nwere ihe ndị dị ka ịka njọ, nkwụsịtụ, ijikọ, emulsifying, ịgbasa, idobe mmiri na ichebe colloid. Enwere ike ịkwadebe ngwọta dị iche iche na oke viscosity. Ọ naghị akwụsi ike n'okpuru okpomọkụ na nrụgide nkịtị, zere iru mmiri, okpomọkụ, na okpomọkụ dị elu, ma nwee ezigbo nnu na-agbaze na dielectrics, a na-ahapụkwa mmiri ya ka o nwee nnukwu nnu ma nọgide na-adịgide.
Oge ozi: Eprel-01-2023