Hydroxyethyl cellulose (HEC) bụ ihe na-abụghị ionic, mmiri-soluble polima ewepụtara na cellulose, a ndammana-emeputa polima dị na cell mgbidi osisi.A na-eji ya eme ihe n'ọtụtụ ụlọ ọrụ dị iche iche dị ka ọgwụ, ihe ịchọ mma, agba, adhesives, na ngwaahịa nri n'ihi ihe ndị pụrụ iche ya dị ka ịgbatị, ịkwado, na ike ijide mmiri.Agbanyeghị, ịkọwa uru pH nke HEC chọrọ nghọta sara mbara nke akụrụngwa ya, nhazi ya na ngwa ya.
Ịghọta Hydroxyethyl Cellulose (HEC):
1. Ọdịdị kemịkalụ:
A na-emepụta HEC site na mmeghachi omume nke cellulose na ethylene oxide, na-ebute iwebata ìgwè hydroxyethyl (-CH2CH2OH) na ọkpụkpụ azụ cellulose.
Ogo nke nnọchi (DS) na-ezo aka na nkezi ọnụọgụ nke otu hydroxyethyl kwa nkeji glucose na yinye cellulose ma na-ekpebi njirimara nke HEC.Ụkpụrụ DS dị elu na-eduga n'ịba ụba mmiri solubility na viscosity dị ala.
2. Ngwongwo:
HEC bụ soluble na mmiri na-emepụta ngwọta doro anya, nke na-eme ka ọ dị mma maka ngwa dị iche iche na-achọ usoro nhazi.
Ọ na-egosipụta omume pseudoplastic, nke pụtara viscosity ya na-ebelata n'okpuru nrụgide shiee, na-enye ohere maka ngwa ngwa na njikwa dị mfe.
A na-emetụta viscosity nke ngwọta HEC site na ihe ndị dị ka ntinye uche, okpomọkụ, pH, na ọnụnọ nke nnu ma ọ bụ ihe mgbakwunye ndị ọzọ.
3. Ngwa:
Ọgwụ: A na-eji HEC dị ka onye na-agba ume na ihe nkwụsi ike n'ụdị ọnụ na usoro ọgwụ dị ka ointments, creams, na nkwusioru.
Ihe ịchọ mma: Ọ bụ ihe a na-ahụkarị na ngwaahịa nlekọta onwe onye gụnyere shampoos, lotions, na ude n'ihi ihe na-eme ka ọ sie ike na emulsifying.
Agba na mkpuchi: A na-agbakwunye HEC na agba, mkpuchi, na adhesives iji chịkwaa viscosity, meziwanye ihe na-asọpụta, na ịkwalite mmepụta ihe nkiri.
Ụlọ ọrụ nri: N'ime ngwaahịa nri, HEC na-eje ozi dị ka onye na-agba ume, stabilizer, na emulsifier n'ime ihe ndị dị ka sauces, uwe, na ngwaahịa mmiri ara ehi.
Uru pH nke Hydroxyethyl Cellulose (HEC):
1. Ndabere pH:
pH nke ngwọta nwere HEC nwere ike imetụta omume ya na arụmọrụ ya na ngwa dị iche iche.
N'ozuzu, HEC kwụsiri ike n'elu oke pH, nke dị n'etiti pH 2 na pH 12. Otú ọ dị, oke pH nwere ike imetụta ihe onwunwe ya na nkwụsi ike ya.
2. Mmetụta pH na viscosity:
Viscosity nke ngwọta HEC nwere ike ịdabere na pH, karịsịa na ụkpụrụ pH dị elu ma ọ bụ dị ala.
Na nso pH na-anọpụ iche (pH 5-8), ngwọta HEC na-egosipụtakarị viscosity ha kacha.
N'ihe dị ala ma ọ bụ dị elu pH, ọkpụkpụ azụ cellulose nwere ike ịnweta hydrolysis, na-eme ka mbelata viscosity na nkwụsi ike.
3. Ngbanwe pH:
N'ime usoro ebe mgbanwe pH dị mkpa, a na-ejikarị ihe nchekwa na-ejigide oke pH chọrọ.
Ihe nchekwa ndị a na-ahụkarị dị ka citrate ma ọ bụ phosphate buffers dakọtara na HEC ma nyere aka mee ka ihe onwunwe ya guzosie ike n'ime oke pH.
4. Atụmatụ ngwa:
Ndị na-emepụta ihe ga-atụle ndakọrịta pH nke HEC na ihe ndị ọzọ dị na nhazi ahụ.
N'ọnọdụ ụfọdụ, enwere ike ịchọ mgbanwe na pH nke usoro iji kwalite arụmọrụ nke HEC.
Hydroxyethyl cellulose (HEC) bụ polymer vasatail nwere ngwa zuru ebe niile n'ofe ụlọ ọrụ dị iche iche.Ọ bụ ezie na nkwụsi ike pH ya na-esikarị ike n'ọtụtụ ebe, oke pH nwere ike imetụta arụmọrụ na nkwụsi ike ya.Ịghọta ndabere pH nke HEC dị mkpa maka ịmepụta ngwaahịa dị irè ma kwụsie ike na ọgwụ, ihe ịchọ mma, agba, adhesives, na ngwaahịa nri.Site n'ịtụle ndakọrịta pH na iji usoro nhazi kwesịrị ekwesị, HEC nwere ike ịga n'ihu na-eje ozi dị ka ihe bara uru na ngwa dị iche iche.
Oge nzipu: Eprel-15-2024