Cellulose ether (cellulose ether) bụ ngwakọta polymer ewepụtara na cellulose osisi eke wee nweta site na mgbanwe kemịkalụ. Enwere ọtụtụ ụdị cellulose ether, n'ime nke hydroxypropyl methylcellulose (HPMC) bụ nke a na-ahụkarị. HPMC nwere ọmarịcha mmiri solubility, ndim, nkwusioru, imepụta ihe nkiri na nkwụsi ike, a na-ejikwa ya na ihe owuwu ụlọ, ọgwụ, nri na ngwaahịa kemịkalụ kwa ụbọchị.
1. Njirimara anụ ahụ na kemịkalụ nke HPMC
HPMC bụ ihe ewepụtara site na iji methoxy na hydroxypropoxy dochie akụkụ hydroxyl na nhazi cellulose. Ọ nwere ezigbo mmiri solubility ma nwee ike ịgbaze ngwa ngwa na mmiri oyi iji mepụta ngwọta colloidal transperent na viscous, na ngwọta ya na-egosi ụfọdụ nkwụsi ike nke okpomọkụ na okpomọkụ dị iche iche. N'ebe dị ala, ngwọta nke HPMC na-eme omume dị ka mmiri mmiri pseudoplastic, nke pụtara na ọ nwere ezigbo rheological Properties, na viscosity na-ebelata mgbe ọ na-akpali ma ọ bụ itinye nrụgide, ma viscosity na-agbake ngwa ngwa mgbe ike kwụsịrị.
Enwere ike ịchịkwa viscosity nke HPMC site n'ịgbanwe ịdị arọ ya na ogo nke nnọchi, nke na-eme ka ọ dị oke mgbanwe na ngwa dị iche iche. N'ihe gbasara ịkwalite nkwụsi ike ngwaahịa, HPMC nwere ike ịrụ ọrụ site na usoro ndị a.
2. Usoro nke HPMC iji melite nkwụsi ike ngwaahịa
Iwu nke siri ike na rheological
Dị ka a thickener, HPMC nwere ike budata dịkwuo viscosity nke ngwọta ma ọ bụ slurries, si otú na-amụba viscosity kwụsie ike nke usoro. Maka ngwaahịa ụfọdụ chọrọ ijikwa mmiri mmiri, dị ka mkpuchi, ihe ịchọ mma, na nkwusioru ọgwụ, HPMC nwere ike inye aka gbochie ụmụ irighiri ihe siri ike idozi na ịgbatị ndụ shelf nke ngwaahịa ahụ. Tụkwasị na nke ahụ, pseudoplasticity nke HPMC na-enye ohere ka ngwaahịa ahụ kwụsie ike n'oge nchekwa na njem, ma na-eme ka ọsọ na ngwa ngwa mgbe ejiri ya.
Nkwụsịtụ na nkwụsi ike mgbasa
N'ime ụfọdụ sistemụ gbasasịrị, nkwụsi ike nkwusioru nke ihe siri ike ma ọ bụ ụmụ irighiri mmanụ na mgbasa ozi mmiri bụ isi ihe na-emetụta ogo ngwaahịa. HPMC nwere ike na-etolite a edo netwọk Ọdịdị na mmiri mmiri site ya ngwọta ndim na hydrophilic iche iche na ya molekụla Ọdịdị, wrapping chụgara ahụ iji gbochie urughuru agglomeration, sedimentation ma ọ bụ stratification, si otú mma kwụsie ike nke gbasasịrị usoro. Nke a dị mkpa karịsịa maka ngwaahịa ndị dị ka emulsions, nkwusioru, na mkpuchi.
Njirimara mmepụta ihe nkiri na mmetụta oyi akwa nchebe
Ihe na-emepụta ihe nkiri nke HPMC na-enyere ya aka ịmepụta otu ihe nkiri n'elu ngwaahịa mgbe ihichachara. Ihe nkiri a nwere ike ọ bụghị naanị igbochi ihe ndị na-arụ ọrụ na ngwaahịa ahụ ka ọ bụrụ oxidized ma ọ bụ mebie ya site na ụwa dị n'èzí, ma enwere ike iji ya mee ihe n'ọhịa ọgwụ na nri iji chịkwaa ọnụego nke ntọhapụ ọgwụ ma ọ bụ ịgbatị ndụ ndụ nke nri. Tụkwasị na nke ahụ, oyi akwa mkpuchi nke HPMC guzobere nwekwara ike igbochi mmiri na-efunahụ ma melite ịdịte aka na ihe eji ewu ụlọ dị ka ngwa ngwa ciment na mkpuchi.
Nkwụsi ike okpomọkụ na nzaghachi okpomọkụ
HPMC na-egosi nkwụsi ike dị mma na okpomọkụ dị iche iche. Ya viscosity na aqueous ngwọta na-enwe mmetụta karịa okpomọkụ mgbanwe, ma ngwọta viscosity na-anọgide dịtụ mgbe nile na ụlọ okpomọkụ. Na mgbakwunye, HPMC na-enweta gelation reversible na ụfọdụ okpomọkụ, nke na-eme ka ọ nwee mmetụta nkwụsi ike pụrụ iche na sistemu kwesịrị ịma nke ọma na okpomọkụ (dị ka nri na ọgwụ).
3. Ngwa nke HPMC iji meziwanye nkwụsi ike na mpaghara dị iche iche
Ngwa na ihe owuwu ụlọ
N'ihe eji ewu ụlọ dị ka ngwa ngwa ciment na nrapado taịlị, a na-ejikarị HPMC mee ihe iji dozie nkwekọ nke slurry ma mee ka mmiri na-arụ ọrụ na-arụ ọrụ n'oge a na-ewu ya. Tụkwasị na nke ahụ, HPMC na-egbu oge nke ọma na evaporation nke mmiri site na ịmepụta ihe nkiri mgbe ọ nwụsịrị, na-ezere ịgbawa ma ọ bụ na-ebelata oge ọrụ n'oge a na-ewu ụlọ, si otú ahụ na-eme ka nkwụsi ike nke ihe na ihe owuwu dị mma.
Ngwa na nkwadebe ọgwụ
N'ime nkwadebe ọgwụ, a na-eji HPMC eme ihe dị ka onye na-agbapụta ihe, ihe nkiri mbụ na onye ntọhapụ a na-achịkwa. Mmetụta ya siri ike nwere ike melite nkwụsi ike nke ihe ndị na-arụ ọrụ na suspensions ma ọ bụ emulsions ma gbochie nkwụsị ọgwụ ma ọ bụ ọdịda. Na mgbakwunye, ihe nkiri nchebe nke HPMC hibere nwere ike ijikwa ọnụego ntọhapụ nke ọgwụ na ogologo oge ịdị irè ọgwụ. Karịsịa na nkwado ntọhapụ na-adịgide adịgide, HPMC bụ otu n'ime ihe ndị a na-enwetakarị.
Ngwa na nri
N'ụlọ ọrụ nri, a na-ejikarị HPMC eme ihe dị ka thickener na emulsifier iji melite udidi na uto nke nri. Ike hydration ya dị mma nwere ike idowe mmiri nke ọma ma gbatịa ndụ ngwaahịa. Dịka ọmụmaatụ, n'ime ngwaahịa esitere, HPMC nwere ike igbochi mmiri ịpụpụ ngwa ngwa ma melite ịdị nro na ịdị nro nke achịcha na achịcha. Tụkwasị na nke ahụ, a pụkwara iji ihe na-emepụta ihe nkiri nke HPMC mee ihe maka mkpuchi ihe oriri iji gbochie oxidation na njọ.
Ngwa na ngwaahịa kemịkalụ kwa ụbọchị
Na ngwaahịa kemịkalụ kwa ụbọchị dị ka ncha, ncha ntutu, na ngwaahịa nlekọta anụ ahụ, a na-ejikarị HPMC eme ihe dị ka ihe na-esikwu ike na nkwụsi ike. Ọ nwere ike ịbawanye nkwụsi ike nke ngwaahịa ahụ, meziwanye ịdị n'otu nke ụdị ahụ, mee ka emulsions ma ọ bụ gel ngwaahịa dị mfe iji tinye ya na o yikarịrị ka ọ ga-agbatị ma ọ bụ gbasaa. N'otu oge ahụ, mmetụta moisturize nke HPMC na-enyekwa aka mee ka mmetụta dị nro nke ngwaahịa nlekọta anụ ahụ dịkwuo mma.
Dị ka ihe dị mkpa cellulose ether mmepụta, HPMC na-ọtụtụ ebe na-eji dị iche iche ọrụ n'ihi na ya magburu onwe ndim, film-akpụ, nkwusioru na thermal kwụsie ike, karịsịa na mma ngwaahịa kwụsie ike. Ma na ihe owuwu ụlọ, ọgwụ, nri ma ọ bụ ngwaahịa kemịkalụ kwa ụbọchị, HPMC nwere ike ịgbatị ndụ ngwaahịa ahụ n'ụzọ dị ukwuu ma melite arụmọrụ ya site na usoro dị iche iche dị ka ịkwalite viscosity nke sistemụ, imezi ihe akụrụngwa rheological, melite nkwusioru na nkwụsi ike dispersion, na na-eme ihe nkiri nchebe. N'ọdịnihu, na ọganihu nke nkà na ụzụ na na-aga n'ihu na mgbasawanye nke ngwa ubi, ngwa ike nke HPMC na ọtụtụ ubi ga-n'ihu na-ekpughe.
Oge nzipu: Sep-21-2024