I. Okwu mmalite
Hydroxyethyl Cellulose (HEC) bụ polymer na-abụghị ionic mmiri soluble nke a na-ejikarị na mmịpụta mmanụ, mkpuchi, ihe owuwu, kemịkalụ kwa ụbọchị, imepụta akwụkwọ na mpaghara ndị ọzọ. A na-enweta HEC site na mgbanwe kemịkalụ nke cellulose, na njirimara ya na ojiji ya na-ekpebisi ike site na nnọchi hydroxyethyl na mkpụrụ ndụ cellulose.
II. Usoro mmepụta
Usoro mmepụta nke HEC na-agụnye usoro ndị a: cellulose etherification, ịsacha, akpịrị ịkpọ nkụ, ihicha na egweri. Ihe na-esonụ bụ mmeghe zuru ezu na nzọụkwụ ọ bụla:
Cellulose etherification
A na-ebu ụzọ gwọọ cellulose na alkali iji mepụta cellulose alkali (Cellulose Alkali). A na-emekarị usoro a na reactor, na-eji sodium hydroxide ngwọta na-agwọ cellulose eke na-etolite cellulose alkali. Mmeghachi omume kemịkalụ bụ nke a:
Cell-OH+NaOH→Cell-O-Na+H2OCell-OH+NaOH→Cell-O-Na+H 2O
Mgbe ahụ, alkali cellulose na-emeghachi omume na ethylene oxide iji mepụta hydroxyethyl cellulose. A na-eme mmeghachi omume n'okpuru nrụgide dị elu, na-emekarị 30-100 Celsius C, na mmeghachi omume kpọmkwem bụ ndị a:
Cell-O-Na+CH2CH2O→Cell-O-CH2CH2OHCell-O-Na+CH 2CH 2O→Cell-O-CH 2CH 2OH
Mmeghachi omume a chọrọ njikwa ziri ezi nke okpomọkụ, nrụgide na ọnụọgụ ethylene oxide agbakwunyere iji hụ na ịdị n'otu na ịdị mma nke ngwaahịa ahụ.
Ịsacha
Ihe na-akpata crude HEC na-enwekarị alkali na-emeghị eme, ethylene oxide na ihe ndị ọzọ na-emepụta ihe, nke dị mkpa ka e wepụ ya site na ọtụtụ mmiri ịsacha ma ọ bụ ihe na-edozi ihe na-edozi ahụ. A na-achọ nnukwu mmiri n'oge usoro ịsacha mmiri, na mmiri mkpofu mgbe ịsachara kwesịrị ka a gwọọ ya ma wepụ ya.
akpịrị ịkpọ nkụ
Igwe mmiri HEC mgbe ịsachara kwesịrị ka akpọnwụọ ya, na-abụkarị site na nzacha oghere ma ọ bụ nkewa centrifugal iji belata ọdịnaya mmiri.
Ịkpọ nkụ
A na-akpọnwụ HEC akpọnwụ akpọnwụ, na-emekarị site na ihicha mmiri ma ọ bụ ihicha ọkụ. A ghaghị ịchịkwa ọnọdụ okpomọkụ na oge nke ọma n'oge usoro ihicha iji zere mmebi okpomọkụ dị elu ma ọ bụ agglomeration.
Na-egweri
A ghaghị ịkụda ngọngọ HEC a mịrị amị na sieved iji nweta nkesa nha nha nha nha nha, ma mesịa mepụta ntụ ntụ ma ọ bụ ngwaahịa granular.
III. Njirimara arụmọrụ
Mmiri solubility
HEC nwere ezigbo mmiri solubility ma nwee ike igbari ngwa ngwa na ma mmiri oyi na mmiri ọkụ iji mepụta ngwọta transperent ma ọ bụ translucent. Ngwongwo solubility a na-eme ka a na-eji ya eme ihe dị ka thickener na stabilizer na mkpuchi na ngwaahịa kemịkalụ kwa ụbọchị.
Na-ejupụta
HEC na-egosiputa mmetụta siri ike na ngwọta mmiri, na viscosity ya na-abawanye na mmụba nke arọ molekụla. Ngwongwo a na-eme ka ọ dị arọ na-enyere ya aka ịrụ ọrụ n'ịgbasi ike, njide mmiri na imeziwanye arụmọrụ ihe owuwu na mkpuchi mmiri na-ewu ụlọ.
Rheology
Ngwọta mmiri HEC nwere ihe ndị pụrụ iche rheological, na viscosity ya na-agbanwe na mgbanwe nke ngbanwe nke shear, na-egosi ncha ncha ma ọ bụ pseudoplasticity. Ngwongwo rheological a na-enyere ya aka ịhazigharị mmiri na ịrụ ọrụ ihe owuwu na mkpuchi na mmiri mmiri na-egwupụta mmanụ.
Emulsification na nkwusioru
HEC nwere ezigbo emulsification na nkwusioru Njirimara, nke nwere ike mee ka ahụ kwụsịtụrụ ma ọ bụ ụmụ irighiri mmiri na usoro mgbasa ozi iji gbochie stratification na sedimentation. Ya mere, a na-ejikarị HEC eme ihe na ngwaahịa ndị dị ka mkpuchi emulsion na nkwụsị ọgwụ.
Biodegradability
HEC bụ ihe sitere na cellulose eke nwere ezigbo biodegradability, enweghị mmetọ na gburugburu ebe obibi, ma na-emezu ihe achọrọ maka nchekwa gburugburu ebe obibi ndụ ndụ.
IV. Mpaghara ngwa
Mkpuchi
N'ime ihe mkpuchi mmiri, a na-eji HEC eme ihe dị ka ihe na-eme ka ọ dịkwuo mma ma na-eme ka ọ dịkwuo mma na-eme ka mmiri dị mma, ịrụ ọrụ ihe owuwu na ihe mgbochi na-egbochi ihe mkpuchi.
Ihe owuwu
N'ime ihe owuwu ụlọ, a na-eji HEC na-eji ciment dabeere na ciment na putty ntụ ntụ iji meziwanye arụmọrụ ihe owuwu na njide mmiri.
Chemicals kwa ụbọchị
N'ihe nchacha, shampoos, na toothpastes, a na-eji HEC eme ihe dị ka ihe na-eme ka ọ dịkwuo arọ na nkwụsi ike iji meziwanye mmetụta na nkwụsi ike nke ngwaahịa ahụ.
Ala mmanụ
N'ebe a na-egwupụta mmanụ na mmiri na-agbaji, a na-eji HEC na-emezigharị rheology na nkwusioru nke ihe ndị na-egwupụta mmiri na-eme ka ọ dịkwuo mma na nchekwa.
Ịme akwụkwọ
N'ime usoro nhazi akwụkwọ, a na-eji HEC iji chịkwaa mmiri mmiri pulp ma melite otu na ọdịdị elu nke akwụkwọ.
Hydroxyethyl cellulose (HEC) e ọtụtụ-eji na ọtụtụ ulo oru ubi n'ihi na ya magburu onwe mmiri solubility, ndim, rheological Njirimara, emulsification na nkwusioru Njirimara, nakwa dị ka ezi biodegradability. Usoro mmepụta ya tozuru oke. Site na nzọụkwụ nke cellulose etherification, ịsacha, akpịrị ịkpọ nkụ, ihicha na egweri, ngwaahịa HEC nwere ike ịrụ ọrụ kwụsiri ike na ịdị mma dị mma. N'ọdịnihu, na mmelite nke ihe nchebe gburugburu ebe obibi na ọganihu nke nkà na ụzụ, atụmanya ngwa nke HEC ga-abawanye.
Oge nzipu: Jul-02-2024