1. Nchịkọta nke HPMC
Hydroxypropyl methylcellulose (HPMC maka mkpụmkpụ) bụ ihe a na-ejikarị eme ihe n'okike nke polymer, nke a na-ejikarị eme ihe na-ewu, mkpuchi, ọgwụ, nri na ubi ndị ọzọ. A na-enweta HPMC site na mgbanwe kemịkalụ nke cellulose eke, nwere mmiri solubility na biocompatibility, yana enweghị ike ime ya na ihe mgbaze organic. N'ihi oke mmiri solubility ya, adhesion, thickening, nkwusioru na ihe ndị ọzọ, HPMC ejiriwo ya mee ihe n'ọtụtụ ebe na ụlọ ọrụ mmepụta ihe, karịsịa na ntinye nke ntụ ntụ putty.
2. Ọrụ HPMC na putty powder
Putty ntụ ntụ bụ ihe owuwu ụlọ a na-eji eme ihe maka ọgwụgwọ mgbidi, ihe ndị bụ isi ya bụ ndị na-ejuputa na ihe ndị na-ekekọta. HPMC, dị ka onye na-ahụ maka ịgbanye mmiri na onye na-ejigide mmiri, nwere ike imeziwanye arụmọrụ nke ntụ ntụ putty nke ọma, gụnyere akụkụ ndị a:
Thickening mmetụta: HPMC Nleta a colloidal ngwọta mgbe dissolving na mmiri, nke nwere a siri ike ndim mmetụta, nwere ike melite rheological Njirimara nke putty ntụ ntụ, mee ka ọ nwere kwesịrị ekwesị viscosity, zere ịdị oke mkpa mgbe itinye, na melite nkasi obi nke ọrụ.
Meziwanye arụmọrụ ihe owuwu: Mmetụta na-ebuwanye ibu nke HPMC nwere ike ọ bụghị naanị mee ka ntụ ntụ na-eme ka ọ ghara ịdaba ma ọ bụ na-agbapụta n'oge usoro ngwa ahụ, ma na-eme ka adhesion nke putty ntụ ntụ dịkwuo mma, na-eme ka ọ dị mfe itinye na mgbidi ahụ, si otú ahụ na-eme ka arụmọrụ ụlọ dịkwuo mma.
Meziwanye njide mmiri: HPMC nwere ike idowe mmiri nke ọma na ntụ ntụ putty wee belata ọnụego mmiri nke evaporation. Nke a nwere ike igbochi elu nke ntụ ntụ putty ka ọ ghara ihicha ngwa ngwa, hụ na ọ na-arụ ọrụ n'oge a na-ewu ụlọ, ma zere mgbawa na ịkwasa.
Mee ka mmetụ aka na ịdị nro dị elu: HPMC nwere ike ọ bụghị naanị ịkwalite ductility nke ntụ ntụ putty, kamakwa melite elu elu ya, na-eme ka oyi akwa ahụ dị nro, nke na-eme ka ọrụ eserese na-esote. N'oge usoro ihe owuwu, HPMC nwere ike inye ezigbo ire ụtọ ma belata ọgbọ nke ntụpọ na afụ.
Meziwanye nkwụsi ike ihe owuwu: Mgbakwunye nke HPMC nwere ike melite mgbochi mmiri ozuzo nke ntụ ntụ ntụ ntụ, gbochie ntinye nke ihe dị mma n'ime ya, ma hụ na àgwà na arụmọrụ nke putty ntụ ntụ agaghị agbanwe nke ọma n'oge nchekwa ogologo oge.
Meziwanye mgbape mgbape: Site na njigide mmiri na mmetụta siri ike nke HPMC, a ga-eme ka mgbape mgbape nke ntụ ntụ putty dịkwuo mma, enwere ike izere mgbawa na mgbidi, na ndụ ọrụ nwere ike ịgbatị.
3. Kwesịrị ekwesị viscosity nke HPMC
Mmetụta nke HPMC na ntụ ntụ putty nwere njikọ chiri anya na viscosity ya. A ga-ekpebi nhọrọ nke viscosity dị ka ihe a chọrọ kpọmkwem nke ntụ ntụ putty na gburugburu ebe obibi. N'ikwu okwu n'ozuzu, viscosity nke HPMC sitere na narị otu narị ruo iri puku kwuru iri puku millipoise (mPa·s), n'ime nke viscosities dị iche iche dabara maka ụdị putty ntụ ntụ na ihe owuwu chọrọ.
HPMC viscosity dị ala (ihe dị ka 1000-3000 mPa·s): dabara adaba maka ntụ ntụ ntụ ntụ ma ọ bụ ntinye ntọala, nke a na-ejikarị na ọnọdụ ebe achọrọ mmiri dị elu. Low viscosity HPMC nwere ike inye mma mkpuchi arụmọrụ, na-eme ka putty ntụ ntụ mfe iji rụọ ọrụ, ma mmiri njigide na mgbawa na-eguzogide adịghị ike.
Ọkara viscosity HPMC (ihe dị ka 3000-8000 mPa·s): dabara maka ọtụtụ usoro ntụ ntụ ntụ ntụ, nke nwere ike inye ezigbo njigide mmiri na mgbochi mmiri ma na-ejigide mmiri dị mma. HPMC nke viscosity a nwere ike ọ bụghị naanị izute ihe mkpuchi chọrọ n'oge a na-ewu ụlọ, kamakwa na-egbochi nsogbu ndị dị ka mgbawa na ịdaba.
HPMC viscosity dị elu (ihe dị ka 8000-20000 mPa·s): dabara adaba maka nnukwu akwa nke ntụ ntụ putty ma ọ bụ oge chọrọ mmetụta siri ike. High viscosity HPMC nwere ike na-enye mma oké mkpuchi arụmọrụ na nkwụsi ike, na adabara maka mkpuchi ngwa na-achọ ike ike na ire ụtọ, ma e kwesịrị ịrịba ama na oke viscosity nwere ike ime ka putty ntụ ntụ na-adị oke viscous na-emetụta ihe owuwu ọrụ.
Na ngwa bara uru, a ga-ahọrọ viscosity HPMC kwesịrị ekwesị dị ka ihe eji eme ihe na usoro iwu nke ntụ ntụ putty. Dị ka ihe atụ, mgbe mgbidi elu bụ dịtụ ike siri ike ma ọ bụ otutu ewu na-achọrọ, a elu viscosity HPMC nwere ike họrọ welie adhesion na mgbape mgbochi nke mkpuchi; mgbe n'oge na-achọ elu fluidity na ngwa ngwa ewu, obere na ọkara viscosity HPMC nwere ike họrọ.
Hydroxypropyl methylcellulosebụ ihe mgbakwunye ụlọ dị mkpa nke nwere ike imeziwanye arụmọrụ ihe owuwu, njide mmiri, nrapado na mgbape mgbape nke ntụ ntụ putty. Ịhọrọ viscosity HPMC ziri ezi dị oke mkpa maka itinye ntụ ntụ. Enwere ike imezi viscos dị iche iche dịka ụdị ntụ ntụ putty, ebe owuwu ihe, na arụmọrụ chọrọ. Na mmepụta na ihe owuwu n'ezie, ịchịkwa viscosity nke HPMC nwere ike nweta mmetụta ihe owuwu dị mma yana ịrụ ọrụ ogologo oge. Ya mere, dị ka ihe dị iche iche iwu chọrọ, ezi uche na-ahọrọ na imezi viscosity nke HPMC bụ ihe dị mkpa nzọụkwụ iji hụ na arụmọrụ na àgwà nke putty ntụ ntụ.
Oge nzipu: Mar-25-2025