A na-ejikarị ihe ndị na-eme mkpọtụ dị ka hydroxyethyl cellulose (HEC) na ụlọ ọrụ dị iche iche, gụnyere ihe ịchọ mma, ọgwụ na mmepụta nri, iji kwalite viscosity na nkwụsi ike nke usoro.HEC bụ ihe na-abụghị ionic, polymer soluble mmiri nke sitere na cellulose ma mara ya maka ihe ndị na-eme ka ọ dịkwuo mma, yana ike ya ịmepụta ngwọta doro anya ma kwụsie ike.Ọ bụrụ na ị na-achọ ịgbatị ngwọta nwere HEC, enwere ọtụtụ usoro ị nwere ike iji.
1. Ịghọta Hydroxyethyl Cellulose (HEC)
Ọdịdị kemịkalụ: HEC bụ ihe sitere na cellulose, nke bụ polymer na-emekarị nke a chọtara na osisi.Site na mgbanwe kemịkalụ, a na-ewebata otu hydroxyethyl n'ime usoro cellulose, na-eme ka mmiri dị nro na ihe na-eme ka ọ dịkwuo mma.
Mmiri Solubility: HEC bụ nke ukwuu soluble na mmiri, na-eme ka ihe ngwọta doro anya na viscous n'elu dịgasị iche iche nke mkpokọta.
Mechanism siri ike: HEC na-eme ka ihe ngwọta na-esiwanye ike site n'ikike ya ịbanye na ọnyà mmiri dị n'ime ụdọ polymer ya, na-eme netwọk na-abawanye viscosity.
Usoro 2.Techniques maka Ngwọta HEC siri ike
Mmụba ntinye uche: Otu n'ime ụzọ kachasị mfe iji mee ka ngwọta nwere HEC dịkwuo elu bụ ịbawanye ntinye ya.Dị ka ntinye nke HEC na ngwọta na-ebili, otú ahụ ka viscosity ya na-abawanye.Otú ọ dị, enwere ike ịnwe njedebe bara uru na ntinye kachasị elu n'ihi ihe ndị dị ka solubility na ngwaahịa ngwaahịa achọrọ.
Oge hydration: Ikwe ka HEC mee ka mmiri na-ekpo ọkụ n'ụzọ zuru ezu tupu ejiri ya mee ihe nwere ike imeziwanye arụmọrụ ya.Oge hydration na-ezo aka na oge achọrọ maka ụmụ irighiri ihe HEC ka ọ zaa ma gbasaa n'otu n'otu na ihe mgbaze.Ogologo oge hydration na-ebutekarị ihe ngwọta.
Njikwa okpomọkụ: Okpomọkụ nwere ike imetụta viscosity nke ngwọta HEC.N'ozuzu, okpomọkụ dị elu na-ebelata viscosity n'ihi mbelata yinye polymer.N'aka nke ọzọ, iweda ọnọdụ okpomọkụ nwere ike ịbawanye viscosity.Otú ọ dị, oke okpomọkụ nwere ike imetụta nkwụsi ike ngwọta ma ọ bụ mee ka gelation pụta.
Ndozi pH: pH nke ngwọta nwere ike imetụta arụmọrụ nke HEC dị ka onye na-agba ume.Ọ bụ ezie na HEC kwụsiri ike n'elu pH sara mbara, ịhazigharị pH na oke ya kacha mma (na-abụkarị na-anọpụ iche) nwere ike ịkwalite nrụpụta ọrụ.
Co-solvents: Ewebata co-solvents dakọtara na HEC, dị ka glycols ma ọ bụ alcohols, nwere ike ịgbanwe ihe ngwọta Njirimara na welie ndim.Co-solvents nwere ike ime ka HEC gbasaa mgbasa na hydration, na-eduga n'ịbawanye viscosity.
Ọnụ ego Shear: Ọnụ ọgụgụ nke shear, ma ọ bụ ọnụego nke nrụgide na-etinye aka na ngwọta, nwere ike imetụta viscosity nke ngwọta HEC.Ọnụego ncha dị elu na-ebutekarị viscosity mbelata n'ihi nhazi na nhazi nke ụdọ polymer.N'aka nke ọzọ, ọnụ ọgụgụ ndị na-akpụ ntutu dị ala na-akwado mmụba viscosity.
Mgbakwunye Nnu: N'ọnọdụ ụfọdụ, mgbakwunye nke nnu, dị ka sodium chloride ma ọ bụ potassium chloride, nwere ike ime ka arụmọrụ nke HEC dịkwuo elu.Nnu nwere ike ịbawanye ike ionic nke ngwọta, na-eduga na mmekọrịta polymer siri ike na viscosity dị elu.
Ngwakọta ya na ndị ọzọ na-agba agba: Ijikọta HEC na ihe ndị ọzọ na-agba agba ma ọ bụ ihe mgbanwe rheology, dị ka xanthan chịngọm ma ọ bụ guar chịngọm, nwere ike ime ka ihe ndị na-emekọ ihe dịkwuo mma ma melite nkwụsi ike n'ozuzu ya.
3.Ntụle bara uru
Nnwale ndakọrịta: Tupu itinye HEC n'ime usoro ma ọ bụ were usoro ịgbado ọkụ, ọ dị mkpa ịme nnwale ndakọrịta iji hụ na ihe niile na-emekọ ihe ọnụ.Nnwale ndakọrịta nwere ike ịchọpụta ihe ndị nwere ike ime dị ka nkewa nke oge, gelation, ma ọ bụ ibelata nrụpụta.
Nkwalite: Ngwọta HEC siri ike na-achọkarị nguzozi n'etiti viscosity, idoanya, nkwụsi ike, na ihe nrụpụta ndị ọzọ.Nkwalite na-agụnye paramita nhazi nke ọma dị ka itinye uche HEC, pH, okpomọkụ na ihe mgbakwunye iji nweta njirimara ngwaahịa achọrọ.
Nkwụsi ike nhazi: Ọ bụ ezie na HEC na-akwụsi ike n'ozuzu n'okpuru ọnọdụ dịgasị iche iche, ụfọdụ ihe dị ka oke okpomọkụ, oke pH, ma ọ bụ ihe mgbakwunye na-adabaghị adaba nwere ike imebi nkwụsi ike nhazi.Nhazi nhazi nke ọma na nnwale nkwụsi ike dị mkpa iji hụ na ịdịmma ngwaahịa na arụmọrụ ka oge na-aga.
Ntụle usoro iwu: Dabere na ngwa e zubere nke ngwaahịa a gbajiri agbagọ, ntuziaka usoro iwu nwere ike ikpebi ihe ndị anabatara, ntinye na ntinye aha chọrọ.Ọ dị oke mkpa ịgbaso ụkpụrụ na ụkpụrụ dị mkpa iji hụ na nnabata na nchekwa ndị ahịa.
Ngwọta siri ike nwere hydroxyethyl cellulose (HEC) chọrọ nghọta zuru oke nke akụrụngwa ya na usoro dị iche iche iji bulie viscosity na nkwụsi ike.Site n'ịgbanwe ihe ndị dị ka itinye uche, oge hydration, okpomọkụ, pH, ihe mgbakwunye, na ọnụ ọgụgụ shear, ọ ga-ekwe omume ịhazi usoro HEC iji mezuo ihe achọrọ ngwa ngwa.Otú ọ dị, imezu mmetụta nkwụsi ike a chọrọ ka ị na-edobe n'ụzọ doro anya, nkwụsi ike, na ndakọrịta chọrọ nyocha nke ọma, njikarịcha na nrube isi na ụkpụrụ nduzi.Site na nhazi nhazi na nnwale kwesịrị ekwesị, HEC nwere ike ije ozi dị ka onye na-emepụta ihe dị irè n'ofe ụlọ ọrụ dị iche iche, na-eme ka arụmọrụ na mmasị nke ngwaahịa na-enweghị atụ.
Oge nzipu: Mar-29-2024