Njirimara nke teknụzụ okpomọkụ dị elu maka hydroxypropyl methylcellulose

Hydroxypropyl methylcellulose (HPMC)bụ ihe kemịkal dị mkpa, a na-ejikarị eme ihe n'ihe owuwu ụlọ, ọgwụ, nri na ngalaba ndị ọzọ. Karịsịa n'ime ụlọ ọrụ owuwu ụlọ, a na-eji HPMC eme ihe nke ukwuu n'ihi arụmọrụ ya dị mma. Teknụzụ okpomọkụ dị elu na-arụ ọrụ dị mkpa na mmepụta na itinye HPMC n'ọrụ.

1. Ọrụ nke teknụzụ okpomọkụ dị elu na HPMC

Mmepụta Hydroxypropyl methylcellulose na-enweta site na usoro mmeghachi omume kemịkalụ dị ka alkalization na etherification nke cellulose eke. A na-ejikarị teknụzụ okpomọkụ dị elu eme ihe na mgbaze, nkụ na nhazi nke usoro mmeghachi omume. Ọgwụgwọ okpomọkụ dị elu nwere ike ọ bụghị naanị ime ka ọnụego mmeghachi omume dịkwuo ngwa ngwa, kamakwa ime ka ịdị ọcha na nkwụsi ike nke ngwaahịa ahụ ka mma.

Mmeghachi omume ka mma

N'ọnọdụ okpomọkụ dị elu, a na-eme ka ọsọ mmeghachi omume nke cellulose na sodium hydroxide dịkwuo elu, nke na-akwalite mmeghachi omume mgbanwe hydroxypropyl na methyl n'ime mkpụrụ ndụ cellulose, si otú a na-eme ka ogo nnọchi (DS) na ịdị n'otu nke HPMC dịkwuo mma.

Wepụ ihe ndị na-adịghị ọcha

Gburugburu ebe okpomọkụ dị elu nwere ike iwepụ ngwaahịa ndị e mepụtara n'oge mmeghachi omume ahụ nke ọma, dị ka ngwọta alkali na ihe mgbaze na-anaghị emegharị ahụ, ma melite ịdị ọcha nke HPMC.

Mmeziwanye arụmọrụ ihicha

N'oge usoro nkụcha okpomọkụ dị elu, mmiri nke HPMC na-apụ ngwa ngwa, na-ezere ngwaahịa ahụ ịgbakọta ma ọ bụ denature na obere okpomọkụ, ma na-eme ka arụmọrụ kwụsiri ike na nchekwa nke ngwaahịa ahụ ka mma.

2. Mmetụta nke teknụzụ okpomọkụ dị elu na arụmọrụ nke HPMC

Teknụzụ dị elu anaghị emetụta nhazi anụ ahụ nke HPMC, kamakwa ọ na-emetụta mmetụta kemịkalụ ya na mmetụta ojiji ya.

Mgbanwe nke viscositi

Usoro okpomọkụ dị elu nwere ike ijikwa nkesa ibu molekul nke HPMC nke ọma, si otú a na-agbanwe viscosity ya. Okpomọkụ dị elu na-enyere aka belata ohere nke mgbawa nke yinye molekul, na-eme ka viscosity nke HPMC na mmiri mmiri kwụsie ike.

Mmeziwanye iguzogide okpomọkụ

A na-eme ka ọnọdụ okpomọkụ nke HPMC ka mma nke ukwuu site na ọgwụgwọ okpomọkụ dị elu. N'ịrụ ihe nrapado na taịlị, HPMC ka nwere ike ịnọgide na-enwe ezigbo nrapado na ihe mgbochi ikpuchi n'okpuru ọnọdụ okpomọkụ dị elu.

Mmụba ka mma

N'oge usoro nkụcha okpomọkụ dị elu, a na-emezi usoro obere nke HPMC, nke na-eme ka ọ na-agbaze nke ọma na mmiri oyi. Karịsịa n'ebe a na-ewu ihe owuwu dị obere, HPMC nwere ike ịgbaze ngwa ngwa ma mepụta ngwọta colloidal otu.

3. Ngwa kpọmkwem nke teknụzụ okpomọkụ dị elu na usoro mmepụta HPMC

Nkebi mmeghachi omume Etherification

Site n'ime mmeghachi omume etherification na oke okpomọkụ nke 80-100°C, mmeghachi omume nnọchi nke hydroxypropyl na otu methyl nwere ike ime ngwa ngwa, ka HPMC wee nwee ọkwa dị elu nke nnọchi na nkwụsi ike ka mma.

Ịkpọcha na igwepịa ogbo

Teknụzụ nkụ ikuku ọkụ nke dị n'elu 120°C anaghị ewepụ mmiri mmiri, kamakwa ọ na-egbochi ntụ ntụ HPMC ịchịkọta n'oge usoro nkụ. Mgbe nke ahụ gasịrị, a na-eji teknụzụ nkụcha okpomọkụ dị elu eme ka ntụ ntụ HPMC dịkwuo nro ma dị otu, a na-emekwa ka mgbasa nke ngwaahịa ahụ ka mma.

Ọgwụgwọ ọgwụgwọ okpomọkụ dị elu

Mgbe ejiri HPMC mee ihe n'ihe owuwu ma ọ bụ mkpuchi ụlọ, ọgwụgwọ okpomọkụ dị elu nwere ike ime ka mgbochi mgbawa ya ka mma, iguzogide sag na arụmọrụ njigide mmiri, na-eme ka ọ dị mma na gburugburu ebe siri ike.

4. Uru nke teknụzụ okpomọkụ dị elu na ubi ngwa HPMC

Ihe owuwu ụlọ

N'okpuru ebe okpomọkụ dị elu, HPMC na-egosi oke ọkpụrụkpụ na nchekwa mmiri dị mma n'ime ngwa agha na ntụ ntụ putty, na-egbochi ngwa agha ahụ ịkpọnwụ ngwa ngwa ma gbawaa.

Ụlọ ọrụ agba

HPMC nke e ji oke okpomọkụ mepụta nwere ezigbo ọkwa na mmetụta mgbochi ịcha agba na agba latex, nke na-eme ka nrapado na iyi nke mkpuchi ahụ ka mma.

Ụlọ ọrụ ọgwụ

Teknụzụ okpomọkụ dị elu nwere ike ime ka otu HPMC dị na mkpuchi ọgwụ dịkwuo mma ma hụ na mmetụta ntọhapụ ọgwụ ahụ kwụsiri ike.

Ngwa nke teknụzụ okpomọkụ dị elu nkehydroxypropyl methylcelluloseọ bụghị naanị na ọ na-eme ka mmepụta dịkwuo mma, kamakwa ọ na-eme ka arụmọrụ ngwaahịa ka mma. Site na usoro okpomọkụ dị elu, a na-emeziwanye viscosity, ike ịgbaze na nkwụsi ike okpomọkụ nke HPMC nke ọma, na-eme ka ọ nwee ohere itinye ya n'ọrụ sara mbara n'ọhịa nke owuwu, mkpuchi na ọgwụ. N'ọdịnihu, site na imepụta teknụzụ okpomọkụ dị elu na-aga n'ihu, a ga-eme ka arụmọrụ HPMC ka mma, na-enye aka nke ukwuu na mmepe nke ihe ndị na-acha akwụkwọ ndụ akwụkwọ ndụ na ndị na-adịghị emebi gburugburu ebe obibi.