Ka viscosity nke ahụ dịkwuo eluHPMCỌ bụrụ na hydroxypropyl methyl cellulose emee ka arụmọrụ nchekwa mmiri ka mma. Viscosity bụ ihe dị mkpa maka arụmọrụ HPMC. Ugbu a, ndị nrụpụta HPMC dị iche iche na-eji ụzọ na ngwa dị iche iche iji chọpụta viscosity nke HPMC. Ụzọ ndị bụ isi bụ Haake Rotovisko, Hoppler, Ubbelohde na Brookfield, wdg.
Maka otu ngwaahịa ahụ, nsonaazụ nke viscosity nke e ji ụzọ dị iche iche tụọ dị nnọọ iche, ụfọdụ bụ ọbụna ọtụtụ ọdịiche. Ya mere, mgbe a na-atụnyere viscosity, a ghaghị ime ya n'etiti otu usoro nnwale ahụ, gụnyere okpomọkụ, rotor, wdg.
Maka nha nke ihe ndị dị n'ime ya, ka ihe ndị dị n'ime ya na-adị mma, otú ahụ ka ọ na-ejide mmiri nke ọma. Nnukwu ihe ndị dị n'ime ya na-eme ka mmiri ghara ịbanye, elu ya na-agbaze ozugbo ma na-emepụta gel iji kechie ihe ahụ iji gbochie ụmụ irighiri mmiri ka ha ghara ịbanye, mgbe ụfọdụ, a naghị agbaze ya ruo ogologo oge, ọ bụ ezie na a naghị agbaze ya nke ọma, a na-emepụta ihe ngwọta apịtị ma ọ bụ agglomerate. Ọgba aghara nke ihe ndị dị n'ime ya bụ otu n'ime ihe ndị na-eme ka e nwee cellulose ether. Ọgba aghara bụkwa ihe dị mkpa maka arụmọrụ nke methyl cellulose ether. MC maka ihe mkpuchi akọrọ chọrọ ntụ ntụ, obere mmiri dị n'ime ya, na ịdị mma nke 20% ~ 60% nha ihe na-erughị 63um. Ịdị mma na-emetụta ike ịgbaze nkeHPMChydroxypropyl methyl cellulose ether. MC a na-ejikarị granular ma enwere ike ịgbaze ya ngwa ngwa na mmiri na-enweghị agglomerating, mana ọsọ mgbaze ahụ na-adị nwayọ, yabụ ọ dịghị mma maka iji ya na agglomeration. Na agglomeration akọrọ, a na-agbasa MC n'etiti agglomeration, fillers dị mma na ihe ndị e ji simenti mee dị ka simenti, naanị ntụ ntụ dị mma nke ọma nwere ike izere nchikọta nke methyl cellulose ether mgbe a na-agwakọta ya na mmiri. Mgbe MC tinyere mmiri iji gbazee agglomerate, ọ na-esiri ike ịgbasa ma gbazee ya. MC nwere agglomeration dị nkọ ọ bụghị naanị ihe mkpofu, kamakwa ọ na-ebelata ike mpaghara nke agglomerate. Mgbe e wuru agglomerate akọrọ dị otú ahụ n'ebe buru ibu, ọsọ ọgwụgwọ nke agglomerity mpaghara na-ebelata nke ukwuu, na-ebute mgbawa nke oge ọgwụgwọ dị iche iche kpatara. Maka agglomeration igwe, n'ihi obere oge ịgwakọta, agglomerity dị elu.
N'ikwu ya n'ozuzu, ka viscosity dị elu, otú ahụ ka mmetụta njigide mmiri ka mma. Agbanyeghị, ka viscosity dị elu, otú ahụ ka ibu molekul nke MC dị elu, arụmọrụ mgbaze ga-ebelatakwa n'otu aka ahụ, nke nwere mmetụta ọjọọ na ike na arụmọrụ owuwu nke mortar. Ka viscosity dị elu, otú ahụ ka mmetụta ọkpụrụkpụ nke mortar na-apụta ìhè, mana ọ bụghị nhata na mmekọrịta ahụ. Ka viscosity dị elu, mortar mmiri ga-arapara karịa, ma owuwu, arụmọrụ nke ihe na-arapara arapara na njikọta dị elu na ihe ndabere. Mana ọ baghị uru ịbawanye ike nhazi nke mortar mmiri. N'oge owuwu, arụmọrụ mgbochi sag adịghị apụta ìhè. N'ụzọ megidere nke ahụ, ụfọdụ viscosity dị ala mana methyl cellulose ethers agbanwere agbanwe nwere arụmọrụ dị mma n'imeziwanye ike nhazi nke mortar mmiri.
Ka a na-etinyekwu cellulose ether na moto ahụ, otú ahụ ka arụmọrụ nchekwa mmiri ka mma, otú ahụ ka viscosity dị elu, otú ahụ ka arụmọrụ nchekwa mmiri ka mma.
Ncha HPMC nwekwara mmetụta ụfọdụ na njigide mmiri ya, n'ozuzu ya, maka otu viscosity na ịdị mma dị iche iche nke methyl cellulose ether, ọ bụrụ na etinyere ya otu ego ahụ, ka mmetụta njigide mmiri ka mma.
Njide mmiri nke HPMC na-ejikọkwa na okpomọkụ ojiji, na njigide mmiri nke methyl cellulose ether na-ebelata ka okpomọkụ na-arị elu. Mana n'ihe eji eme ihe n'ezie, ọtụtụ gburugburu ebe a na-eji ihe mkpuchi akọrọ na-anọkarị n'okpomọkụ dị elu (karịa ogo 40) n'okpuru ọnọdụ owuwu na ihe na-ekpo ọkụ, dị ka mkpuchi oge okpomọkụ nke ihe mkpuchi putty mgbidi mpụta, nke na-eme ka simenti na ihe mkpuchi akọrọ sie ike ngwa ngwa. Mbelata nke ọnụego njigide mmiri na-eduga na mmetụta doro anya na ma ihe owuwu na iguzogide mgbawa na-emetụta. N'ọnọdụ a, ibelata mmetụta nke ihe okpomọkụ na-aghọ ihe dị oke mkpa. Ọ bụ ezie na a na-ewere mgbakwunye nke methyl hydroxyethyl cellulose ether dị ka ihe mbụ na mmepe teknụzụ, ịdabere na ya na okpomọkụ ka ga-eduga na ike ọgwụgwụ nke ihe onwunwe nke ihe mkpuchi akọrọ. Ọbụna na mmụba nke dose methyl hydroxyethyl cellulose (usoro oge okpomọkụ), owuwu na iguzogide mgbawa ka enweghị ike izute mkpa ojiji. Site na ọgwụgwọ pụrụ iche nke MC, dị ka ịbawanye ogo nke etherification, mmetụta njigide mmiri nke MC nwere ike ịnọgide na-enwe mmetụta ka mma n'okpuru okpomọkụ dị elu, ka o wee nwee ike inye arụmọrụ ka mma n'ọnọdụ siri ike.
Oge ozi: Mee-18-2022