Nke dị elu na viscosity nkehydroxypropyl methylcellulose, ka mma na-arụ ọrụ njide mmiri.Viscosity bụ oke dị mkpa nke arụmọrụ HPMC.Ka ọ dị ugbu a, ndị nrụpụta HPMC dị iche iche na-eji ụzọ na ngwa dị iche iche tụọ viscosity nke HPMC.Ụzọ ndị bụ isi bụ Haake Rotovisko, Hoppler, Ubbelohde na Brookfield.
Maka otu ngwaahịa ahụ, nsonaazụ viscosity tụrụ site na ụzọ dị iche iche dị nnọọ iche, ụfọdụ na-enwekwa ọdịiche okpukpu abụọ.Ya mere, mgbe ị na-atụnyere viscosity, jide n'aka na ị ga-eme ya n'etiti otu ụzọ ule, gụnyere okpomọkụ, rotor, wdg.
N'ihi na urughuru size, mma urughuru, mma na mmiri njigide.Mgbe nnukwu akụkụ nke cellulose ether batara na mmiri, elu ahụ na-agbaze ozugbo iji mepụta gel, nke na-ekpuchi ihe ahụ iji gbochie ntinye nke mmiri mmiri na-aga n'ihu..Ọ na-emetụta nke ukwuu mmetụta njide mmiri nke cellulose ether ya, na solubility bụ otu n'ime ihe ndị na-ahọrọ cellulose ether.Ịdị mma bụkwa ihe ngosi arụmọrụ dị mkpa nke methyl cellulose ether.A na-achọ MC a na-eji maka ntụ ntụ ntụ ntụ ka ọ bụrụ ntụ ntụ, nke nwere mmiri dị ala, na ịdị mma na-achọkwa 20% ruo 60% nke nha nha ka ọ bụrụ ihe na-erughị 63um.Ịdị mma na-emetụta solubility nke hydroxypropyl methylcellulose ether.Oke MC na-abụkarị granular, ọ dịkwa mfe igbari n'ime mmiri na-enweghị agglomeration, mana ọnụego mgbasa na-adị ngwa ngwa, yabụ na ọ dịghị mma maka iji ngwa ngwa akọrọ.N'ime ngwa ngwa ntụ ntụ akọrọ, MC na-agbasasị n'etiti ihe ndị dị na cimenti dị ka nchịkọta, ihe ndị dị mma na ciment.Naanị ezigbo ntụ ntụ nwere ike izere agglomeration nke methyl cellulose ether mgbe ị na-agwakọta mmiri.Mgbe a na-agbakwunye MC na mmiri iji gbazee agglomerates, ọ na-esiri ike ịgbasa na igbari.MC na ịdị mma dị oke njọ abụghị naanị ihe efu, kamakwa ọ na-ebelata ike mpaghara nke ngwa agha ahụ.Mgbe a na-arụ ụrọ ntụ ntụ dị otú ahụ n'ebe buru ibu, a na-ebelata ọsọ ọsọ nke ntụ ntụ ntụ ntụ dị n'ógbè ahụ, na mgbawa na-eme n'ihi oge ọgwụgwọ dị iche iche.Maka ngwa agha ịgbasa na-eji arụ ọrụ arụ ọrụ, n'ihi oge mkpali dị mkpụmkpụ, a chọrọ ịdị mma ka ọ dị elu.
N'ikwu okwu n'ozuzu, ka viscosity dị elu, ka mma na-ejide mmiri.Otú ọ dị, elu viscosity na elu nke molekụla arọ nke MC, kwekọrọ ekwekọ Mbelata ya solubility, nke nwere mmetụta ọjọọ na ike na ewu Njirimara nke ngwa agha.Ihe dị elu nke viscosity, otú ahụ ka ọ na-apụta ìhè na mmetụta nke ngwa ngwa, ma ọ bụghị nha.Ka viscosity dị elu, otú ahụ ka ngwa ngwa mmiri ga-adịwanye mma.N'oge a na-ewu ụlọ, ọ ga-arapara na scraper ma nwee nnukwu adhesion na mkpụrụ.Mana ọ na-eme ntakịrị ịbawanye ike nhazi nke ngwa agha mmiri n'onwe ya.N'oge a na-ewu ụlọ, arụmọrụ nke arụmọrụ mgbochi na-apụtaghị ìhè.N'ụzọ megidere nke ahụ, ụfọdụ viscosity dị ala mana emegharịrị methyl cellulose ethers nwere ọmarịcha arụmọrụ n'ịkwalite ike nhazi nke ngwa agha mmiri.
Ọnụ ọgụgụ dị ukwuu nke cellulose ether agbakwunyere na ngwa agha ahụ, ka mma na-arụ ọrụ njide mmiri, na-eme ka viscosity dị elu, ka mma na-arụ ọrụ njide mmiri.
Ịdị mma nke HPMC nwekwara mmetụta ụfọdụ na njide mmiri ya.N'ikwu okwu n'ozuzu, maka methyl cellulose ethers nwere otu viscosity ma dị iche iche dị mma, n'ihe banyere otu ego mgbakwunye, nke ka mma nke ọma, ka mma na-ejigide mmiri.
Njide mmiri nke HPMC na-emetụtakwa ọnọdụ okpomọkụ a na-eji, na njide mmiri nke methyl cellulose ether na-ebelata na mmụba nke okpomọkụ.Otú ọ dị, na ngwa ihe bara uru, a na-etinye ụrọ ntụ ntụ akọrọ na-ekpo ọkụ na-ekpo ọkụ na oke okpomọkụ (dị elu karịa 40 degrees) n'ọtụtụ gburugburu, dị ka mgbidi mpụta putty plasta n'okpuru anyanwụ n'oge okpomọkụ, nke na-emekarị ngwa ngwa Ịgwọ ciment na hardening. ngwa agha akọrọ.Mbelata nke njide mmiri emeela ka a ghọta nke ọma na ma arụmọrụ na nkwụsị mgbawa na-emetụta, ọ dịkwa oke mkpa iji belata mmetụta nke ihe okpomọkụ n'okpuru ọnọdụ ndị dị otú ahụ.Ọ bụ ezie na methyl hydroxyethyl cellulose ether additive ka a na-ewere ugbu a dị ka onye na-ebute ụzọ na mmepe teknụzụ, ịdabere na okpomọkụ ka nwere ike iduga n'ịrụ ọrụ ngwa ngwa akọrọ.Ọ bụ ezie na ọnụ ọgụgụ nke methyl hydroxyethyl cellulose (usoro okpomọkụ) na-abawanye, ịrụ ọrụ na nkwụsị mgbawa ka enweghị ike igbo mkpa nke iji.Site na ụfọdụ ọgwụgwọ pụrụ iche, dị ka ịba ụba nke etherification, MC nwere ike idobe mmetụta njigide mmiri ya ka mma na okpomọkụ dị elu, ka o wee nwee ike inye ọrụ ka mma n'okpuru ọnọdụ siri ike.
Oge nzipu: Ọktoba 20-2022