Hydroxypropyl methylcellulose bụ polymer na-ewu ewu na-agbaze mmiri nke na-emepụta ngwọta doro anya ma kwụsie ike na mmiri ma na-ejikarị eme ihe na ụlọ ọrụ ọgwụ, nri na ihe owuwu. Ọ bụ ihe na-abụghị nke cellulose nke na-abụghị ionic nke na-eme ka njikọ na njikọta nke ngwaahịa ikpeazụ. Iji hụ na arụmọrụ dị elu nke hydroxypropyl methylcellulose, ngwaahịa a kwesịrị ịnwale na iru eru tupu ejiri ya. N'isiokwu a, anyị ga-atụle ụzọ atọ a pụrụ ịdabere na ya iji kọwaa àgwà hydroxypropyl methylcellulose.
1. Nnwale viscosity
Viscosity nke hydroxypropyl methylcellulose bụ oke dị mkpa iji chọpụta ogo ya. Viscosity bụ nguzogide mmiri na-asọpụta ma tụọ ya na centipoise (cps) ma ọ bụ mPa.s. Viscosity nke hydroxypropyl methylcellulose na-adịgasị iche dabere na ịdị arọ ya na ogo nke nnọchi ya. Dị elu ogo nke nnọchi, na-ebelata viscosity nke ngwaahịa.
Iji nwalee viscosity nke hydroxypropyl methylcellulose, igbari obere ngwaahịa na mmiri ma jiri viscometer tụọ viscosity nke ngwọta. Viscosity nke ngwọta kwesịrị ịdị n'ime oke akwadoro nke onye na-eweta ngwaahịa nyere. Ngwaahịa dị mma hydroxypropyl methylcellulose kwesịrị inwe viscosity na-agbanwe agbanwe, nke bụ ihe ngosi nke ịdị ọcha na nha nha nha.
2. Nleba anya ule
Ogo nnọchi anya na-ezo aka na oke ọnụọgụ nke otu hydroxyl na cellulose nke hydroxypropyl ma ọ bụ methyl nọchiri anya ya. Ogo nke nnọchi bụ ihe na-egosi ịdị ọcha nke ngwaahịa, ka ogo nke nnọchi dị elu, ka ngwaahịa ahụ dị ọcha. Ngwaahịa hydroxypropyl methylcellulose dị elu kwesịrị ịnwe ngbanwe dị elu.
Iji nwalee ogo ngbanwe, a na-eji sodium hydroxide na hydrochloric acid mee titration. Kpebie ego sodium hydroxide chọrọ iji kpochapụ hydroxypropyl methylcellulose wee gbakọọ ogo nnọchi anya site na iji usoro a:
Ọkwa nke nnọchi = ([Mpịakọta NaOH] x [Molarity nke NaOH] x 162) / ([Arọ nke Hydroxypropyl Methyl Cellulose] x 3)
Ogo ngbanwe kwesịrị ịdị n'ime oke akwadoro nke ndị na-ebu ngwaahịa nyere. Ogo ngbanwe nke ngwaahịa hydroxypropyl methylcellulose dị elu kwesịrị ịdị n'ime oke akwadoro.
3. Solubility ule
Solubility nke hydroxypropyl methylcellulose bụ isi ihe ọzọ na-ekpebi ogo ya. Ngwaahịa ahụ kwesịrị ịdị nro na mmiri ma ghara ịmepụta lumps ma ọ bụ gels. Ngwaahịa hydroxypropyl methylcellulose dị elu kwesịrị ịgbari ngwa ngwa na nke ọma.
Iji mee ule solubility, gbazee obere ngwaahịa na mmiri ma kpalie ngwọta ruo mgbe agbazere kpamkpam. Ihe ngwọta kwesịrị ịbụ nke doro anya na enweghị lumps ma ọ bụ gels. Ọ bụrụ na ngwaahịa ahụ anaghị agbaze ngwa ngwa ma ọ bụ mepụta lumps ma ọ bụ gels, ọ nwere ike ịbụ akara nke adịghị mma.
N'ikpeazụ, hydroxypropyl methylcellulose bụ akụrụngwa bara uru ejiri na ụlọ ọrụ dị iche iche. Iji hụ na ngwaahịa dị elu, a na-eme viscosity, nnọchi na ule solubility. Nnwale ndị a ga-enyere aka ịghọta nke ọma njirimara ngwaahịa ma nyere aka ịmata àgwà ya. Hydroxypropyl methylcellulose dị elu nwere viscosity na-agbanwe agbanwe, ogo dị elu nke nnọchi, na agbaze ngwa ngwa na otu n'ime mmiri.
Oge nzipu: Jul-11-2023