N'ihe gbasara agba, hydroxyethyl cellulose (HEC) bụ ihe na-eme ka agba sie ike ma na-agbanwe ọdịdị ya nke ọma nke nwere ike ime ka nchekwa, nhazi na ihe owuwu nke agba dịkwuo mma. Iji tinye hydroxyethyl cellulose na agba ma hụ na ọ na-arụ ọrụ nke ọma, a ga-agbaso usoro na ihe ndị a chọrọ iji lezie anya. Usoro a kapịrị ọnụ bụ dịka ndị a:
1. Àgwà nke hydroxyethyl cellulose
Hydroxyethyl cellulose bụ polima na-agbaze na mmiri nke na-abụghị ionic, nke nwere ezigbo ihe ndị na-eme ka ọ sie ike, na-emepụta ihe nkiri, na-ejide mmiri, na-eme ka ihe na-agbaze na ihe ndị na-eme ka ihe dị nro. A na-ejikarị ya eme ihe na agba mmiri, ihe mgbakwunye, seramiiki, ink na ngwaahịa ndị ọzọ. A na-enweta ya site na iji otu hydroxyethyl dochie akụkụ nke otu hydroxyl dị na yinye molekul cellulose, ya mere ọ nwere ezigbo mmiri ịgbaze.
Isi ọrụ nke HEC na agba bụ:
Mmetụta nke ịcha agba: Mee ka agba ahụ dịkwuo mma, gbochie agba ahụ ịcha agba, ma mee ka o nwee ihe owuwu mara mma.
Mmetụta nkwụsịtụ: Ọ nwere ike ịgbasa ma mee ka ihe siri ike dịka agba na ihe ndị na-ejupụta ihe sie ike sie ike iji gbochie ha ịda.
Mmetụta njide mmiri: Mee ka njide mmiri nke ihe mkpuchi ahụ dịkwuo mma, gbasaa oge mmeghe, ma melite mmetụta mmiri nke agba ahụ.
Njikwa Rheology: gbanwee mmiri na ọkwa nke mkpuchi ahụ, ma melite nsogbu akara ahịhịa n'oge a na-ewu ya.
2. Usoro mgbakwunye nke hydroxyethyl cellulose
Nzọụkwụ tupu ịgbaze N'ọrụ n'ezie, a chọrọ ka hydroxyethyl cellulose gbasaa ma gbazee nke ọma site na usoro tupu ịgbaze. Iji hụ na cellulose nwere ike ịrụ ọrụ ya nke ọma, a na-atụkarị aro ka a gbazee ya na mmiri mbụ, kama itinye ya ozugbo na mkpuchi ahụ. Usoro ndị a kapịrị ọnụ bụ ndị a:
Họrọ ihe mgbaze kwesịrị ekwesị: a na-ejikarị mmiri e tinyere n'ọkụ eme ihe dị ka ihe mgbaze. Ọ bụrụ na e nwere ihe mgbaze ndị ọzọ dị n'ime sistemu mkpuchi ahụ, a ga-agbanwe ọnọdụ mgbaze ahụ dịka ihe mgbaze ahụ si dị.
Jiri nwayọ fesa hydroxyethyl cellulose: Jiri nwayọ fesa ntụ hydroxyethyl cellulose ahụ ka ị na-akpali mmiri ahụ iji gbochie njikọta. Ọsọ mkpali ahụ kwesịrị ịdị nwayọ iji zere ibelata ọsọ mgbasa nke cellulose ma ọ bụ ịmepụta "colloids" n'ihi oke ike ịkpụcha.
Mgbaze na-adịgide adịgide: Mgbe a fesasịrị hydroxyethyl cellulose, ọ dị mkpa ka a hapụ ya ka ọ nọrọ ruo oge ụfọdụ (na-abụkarị nkeji iri atọ ruo ọtụtụ awa) iji hụ na cellulose ahụ azaala ma gbazee kpamkpam n'ime mmiri. Oge mgbaze ahụ dabere n'ụdị cellulose, okpomọkụ ihe mgbaze na ọnọdụ mkpali.
Hazie okpomọkụ nke ịgbaze: Ịbawanye okpomọkụ na-enyere aka ime ka usoro ịgbaze nke hydroxyethyl cellulose dị ngwa ngwa. A na-atụkarị aro ka achịkwa okpomọkụ nke ngwọta n'etiti 20℃-40℃. Oke okpomọkụ nwere ike ibute mmebi nke cellulose ma ọ bụ mmebi nke ngwọta.
Ịgbanwe uru pH nke ihe ngwọta ahụ. Ọ na-agbaze nke ọma n'okpuru ọnọdụ na-anọpụ iche ma ọ bụ obere alkaline, yana uru pH dị n'etiti 6-8. N'oge usoro ịgbaze, enwere ike ịgbanwe uru pH site na ịgbakwunye ammonia ma ọ bụ ihe alkaline ndị ọzọ dịka ọ dị mkpa.
Ịtinye ihe ngwọta hydroxyethyl cellulose na sistemụ mkpuchi Mgbe agbazechara, tinye ihe ngwọta na mkpuchi ahụ. N'oge usoro mgbakwunye ahụ, a ga-agbakwunye ya nwayọ nwayọ ma na-akpali ya mgbe niile iji hụ na ngwakọta zuru oke na matrix mkpuchi ahụ. N'oge usoro ngwakọta ahụ, ọ dị mkpa ịhọrọ ọsọ mkpali kwesịrị ekwesị dịka sistemụ dị iche iche si dị iji gbochie sistemụ ahụ ịfụ ụfụfụ ma ọ bụ mmebi cellulose n'ihi oke ike ịkwa akwa.
Ịgbanwe viscosity Mgbe etinyere hydroxyethyl cellulose, enwere ike ijikwa viscosity nke mkpuchi ahụ site na ịgbanwe ego agbakwunyere. N'ozuzu, ọnụọgụ hydroxyethyl cellulose ejiri dị n'etiti 0.3%-1.0% (maka mkpokọta ibu nke mkpuchi ahụ), a ga-agbanwekwa ọnụọgụ akọwapụtara nke etinyere ya site na nnwale dịka ihe achọrọ maka nhazi nke mkpuchi ahụ si dị. Oke oke nke mgbakwunye nwere ike ime ka mkpuchi ahụ nwee oke viscosity na obere mmiri mmiri, na-emetụta arụmọrụ owuwu; ebe mgbakwunye zuru oke nwere ike ọ gaghị enwe ike ịrụ ọrụ nke thickness na nkwụsịtụ.
Mee ule nhazi ọkwa na nchekwa mgbe etinyere hydroxyethyl cellulose ma gbanwee usoro mkpuchi ahụ, a ga-anwale arụmọrụ owuwu mkpuchi ahụ, gụnyere nhazi ọkwa, sag, njikwa akara ahịhịa, wdg. N'otu oge ahụ, a chọkwara ule nhazi nchekwa mkpuchi ahụ iji hụ na mkpuchi ahụ dị ọcha mgbe ọ guzoro ruo oge ụfọdụ, mgbanwe viscosity, wdg, iji nyochaa nkwụsi ike nke hydroxyethyl cellulose.
3. Ihe Ndị A Ga-akpachara Anya
Gbochie njikọta: N'oge usoro ịgbaze, hydroxyethyl cellulose dị mfe ịmịkọrọ mmiri ma zaa, yabụ ọ dị mkpa ka a fesa ya n'ime mmiri nwayọ nwayọ ma hụ na e tinyere ya nke ọma iji gbochie akpụkọ. Nke a bụ njikọ dị mkpa n'ọrụ ahụ, ma ọ bụghị ya, ọ nwere ike imetụta ọnụego mgbaze na otu esi agbaze.
Zere ike ịkwa akwa dị elu: Mgbe ị na-etinye cellulose, ọsọ ịkpalite ekwesịghị ịdị oke elu iji zere imebi yinye molekul cellulose n'ihi ike ịkwa akwa dị oke elu, nke na-ebute mbelata na arụmọrụ ya na-eme ka ọ sie ike. Na mgbakwunye, na mmepụta mkpuchi na-esote, a kwesịkwara izere iji ngwa ịkwa akwa dị elu dịka o kwere mee.
Na-achịkwa okpomọkụ nke mmiri: Mgbe a na-agbaze hydroxyethyl cellulose, okpomọkụ mmiri ekwesịghị ịdị oke elu. A na-atụkarị aro ka a chịkwaa ya na 20℃-40℃. N'ọnọdụ okpomọkụ dị elu, cellulose nwere ike imebi, na-eme ka mmetụta ya na viscosity belata.
Nchekwa ihe ngwọta: A na-achọkarị ịkwadebe ma jiri ihe ngwọta hydroxyethyl cellulose ozugbo. Nchekwa ogologo oge ga-emetụta viscosity na nkwụsi ike ya. A na-atụkarị aro ka a kwadebe ihe ngwọta achọrọ n'ụbọchị emepụtara agba iji nọgide na-arụ ọrụ nke ọma.
Ntinye nke hydroxyethyl cellulose na agba abụghị naanị usoro ngwakọta anụ ahụ dị mfe, kamakwa ọ dị mkpa ijikọta ya na ihe achọrọ n'ezie na nkọwapụta ọrụ iji hụ na ejiri ihe ndị na-eme ka ọ sie ike, nkwụsịtụ na ihe ndị na-ejide mmiri mee ihe nke ọma. N'oge usoro mgbakwunye, lezie anya na usoro tupu mgbaze, njikwa nke okpomọkụ mgbaze na uru pH, na ngwakọta zuru oke mgbe etinyere ya. Nkọwa ndị a ga-emetụta kpọmkwem ịdị mma na nkwụsi ike arụmọrụ nke agba ahụ.
Oge ozi: Sep-19-2024