Kedu ihe bụ ihe gbasara rheological nke HPMC?

Kedu ihe bụ njirimara rheological nke ọgwụ ahụ?HPMC?

Hydroxypropyl methylcellulose (HPMC) bụ polima nwere ọtụtụ ihe dị iche iche nke a na-eji eme ihe nke ukwuu n'ọtụtụ ụlọ ọrụ dị iche iche, gụnyere ọgwụ, ihe owuwu, nri, na ihe ịchọ mma, nke bụ isi n'ihi ihe pụrụ iche ya dị na rheological. Rheology bụ ọmụmụ nke usoro na mgbanwe nke ihe, nghọta nke ihe ndị dị na rheological nke HPMC dịkwa oke mkpa maka ime ka arụmọrụ ya ka mma n'ọtụtụ ọrụ dị iche iche.

Viscosity: HPMC na-egosipụta àgwà pseudoplastic ma ọ bụ shear-thinning, nke pụtara na viscosity ya na-ebelata ka ọnụego shear na-abawanye. Njirimara a dị mkpa na ngwa dịka usoro ọgwụ, ebe ọ na-enye ohere maka ịmịpụta, ịgbasa, na itinye ya n'ọrụ dị mfe. Enwere ike ịhazi viscosity site na ịgbanwe ogo nnọchi (DS) na ibu molekul nke HPMC.

Thixotropy: Thixotropy na-ezo aka na mgbanwe gel-sol a na-agbanwe agbanwe nke ihe ụfọdụ na-egosipụta n'okpuru nrụgide shear. Gel HPMC nke e mepụtara n'oge ezumike nwere ike imebi n'okpuru shear ma weghachite nhazi jel ha mgbe ewepụrụ nrụgide ahụ. Ihe onwunwe a bara uru na ngwa dị ka agba, ebe ọ na-egbochi ịda mba n'oge itinye ya mana ọ na-eme ka mkpuchi kwesịrị ekwesị dịgide ozugbo etinyere ya.

Mmiri: HPMC nwere hygroscopic ma nwee ike ịmịkọrọ mmiri, na-ebute ọzịza na mmụba nke viscosity. Ogo mmiri na-adabere na ihe ndị dị ka okpomọkụ, pH, na ike ionic nke ihe gbara ya gburugburu. Mmiri na-arụ ọrụ dị mkpa n'ịchịkwa mwepụta ọgwụ site na ọgwụ na ịnọgide na-enwe mmiri dị na ngwaahịa nri.

Mmetụta nke Okpomọkụ:HPMCngwọta na-egosipụta viscosity dabere na okpomọkụ, yana viscosity na-ebelata ka okpomọkụ na-arị elu. Agbanyeghị, omume a nwere ike ịdị iche dabere na ihe dịka ntinye polima na pH ngwọta. Mmetụta okpomọkụ dị oke mkpa na ngwa dịka ihe owuwu, ebe ọ na-emetụta ike ọrụ na oge ịtọ.

Mmetụta Nnu: Ngwọta HPMC nwere ike igosi mmetụta n'ebe nnu dị, ebe ụfọdụ nnu na-eme ka viscosity dịkwuo mma ebe ndị ọzọ na-ebelata viscosity. Ihe a na-akpata ya bụ mmekọrịta dị n'etiti molekul HPMC na ion dị na mmiri. Mmetụta nnu dị mkpa n'ụdị ọgwụ na ngwaahịa nri ebe a chọrọ ka ejiri nlezianya chịkwaa ọdịnaya nnu.

Ndabere na Ọnụego Ịcha Ncha: Njirimara rheological nke ngwọta HPMC dabere nke ukwuu na ọnụego ịkpụ ncha etinyere. Na obere ọnụego ịkpụ ncha, viscosity dị elu n'ihi mmụba nke njikọ molekul, ebe na nnukwu ọnụego ịkpụ ncha, viscosity na-ebelata n'ihi ịcha ncha. Ịghọta ịdabere na ọnụego ịkpụ ncha dị oke mkpa maka imepụta ọnọdụ nhazi na ngwa dị iche iche.

Nkwụsị Mkpụrụ Ngwugwu: HPMC nwere ike ịrụ ọrụ dị ka ihe na-egbochi mkpụrụ ngwugwu dị na mmiri mmiri n'ihi na ọ na-eme ka ọ sie ike ma na-eme ka ọ sie ike. Ọ na-enyere aka igbochi nguzozi nke mkpụrụ siri ike, na-ahụ na nkesa na nha nhata dị n'otu ngwaahịa dịka agba, ihe nrapado, na ihe nkwusioru ọgwụ.

Nhazi jel:HPMCnwere ike ịmepụta gel n'ọtụtụ dị elu ma ọ bụ n'ihu ihe ndị na-ejikọ ọnụ dịka cations divalent. Gel ndị a na-egosipụta njirimara viscoelastic ma ejiri ha mee ihe dịka nnyefe ọgwụ a na-achịkwa, ebe ọ dị mkpa ka ewepụta ihe ndị na-arụ ọrụ n'oge niile.

Njirimara rheological nke HPMC, gụnyere viscosity, thixotropy, hydration, okpomọkụ na mmetụta nnu, ịdabere na ọnụego shear, nkwụsịtụ ihe, na nhazi gel, na-arụ ọrụ dị oke mkpa n'ịchọpụta arụmọrụ ya na ngwa ụlọ ọrụ dị iche iche. Ịghọta na ijikwa ihe ndị a dị mkpa maka imeziwanye nhazi na nhazi nke ngwaahịa dabere na HPMC.