Ka elu viscosity nke hydroxypropyl methylcellulose, ka mma na-arụ ọrụ njide mmiri. Viscosity bụ ihe dị mkpa maka ịrụ ọrụ HPMC. Ugbu a, ndị na-emepụta 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 dịgasị iche iche dị iche iche, ụfọdụ na-adịkwa okpukpu abụọ. Ya mere, mgbe ị na-atụnyere viscosities, jide n'aka na ị ga-eme ya n'etiti otu ụzọ ule, gụnyere okpomọkụ, spindle, wdg.
Banyere urughuru nha, mma nke ahụ, ka mma na-ejigide mmiri. Mgbe nnukwu akụkụ nke cellulose ether batara na mmiri, elu ahụ na-agbaze ozugbo iji mepụta gel, nke na-ekpuchi ihe ahụ ma na-egbochi ịbanye na mmiri mmiri na-aga n'ihu. . Ọ na-emetụta n'ụzọ dị 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 methylcellulose ether. A na-achọ MC eji na ngwa agha akọrọ ka ọ bụrụ ntụ ntụ, na-enwe obere mmiri ọdịnaya, 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 na mfe soluble na mmiri na-enweghị caking, ma mgbasa ọnụego bụ nnọọ ngwa ngwa, n'ihi ya, ọ dịghị adabara iji na akọrọ ngwa agha. N'ime ngwa agha akọrọ, a na-agbasa MC n'ime ihe simenti dị ka mkpokọta, ezigbo filler na ciment. Naanị ntụ ntụ nke dị mma ga-egbochi methylcellulose ether ka ọ ghara ịkụkọta mgbe agwakọta ya na mmiri. Mgbe MC gbakwunyere mmiri iji gbazee mkpokọta, ọ na-esiri ike ịgbasa na igbari. MC na ịdị mma dị oke njọ ọ bụghị naanị na-akpata n'efu, kamakwa na-ebelata ike mpaghara nke ngwa agha ahụ. Mgbe a na-arụ ụdị ngwa agha akọrọ a n'ebe buru ibu, ọ na-ebelata ọsọ nke ngwa ngwa nkụ nke mpaghara ahụ, na mgbawa na-apụta n'ihi oge ọgwụgwọ dị iche iche. N'ihi na ịgba ngwa agha iji n'ibu owuwu, elu fineness a chọrọ n'ihi mkpụmkpụ ịgwakọta oge.
N'ikwu okwu n'ozuzu, ka viscosity dị elu, ka mma na-ejide mmiri. Otú ọ dị, ka elu viscosity na molekụla arọ nke MC, kwekọrọ ekwekọ mbelata solubility, nke nwere mmetụta ọjọọ na ike na ewu arụmọrụ 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, ka ngwa ngwa mmiri na-abawanye. Ọ ga-arapara na scraper n'oge a na-ewu ụlọ ma nwee nnukwu adhesion na mkpụrụ. Mana ọ na-eme ntakịrị ịbawanye ike nhazi nke ngwa agha mmiri n'onwe ya. N'oge usoro ihe owuwu ahụ, arụmọrụ mgbochi sag abụghị ihe doro anya. N'ụzọ dị iche, ụfọdụ methylcellulose ethers nwere obere viscosity mana emezigharịrị nwere ezigbo ihe 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 elu viscosity, 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 mma, mgbe ego mgbakwunye bụ otu, mma mma mma, mma na-ejigide mmiri mmetụta.
Njide mmiri nke HPMC na-emetụtakwa ọnọdụ okpomọkụ. Njide mmiri nke methylcellulose ether na-ebelata ka okpomọkụ na-abawanye. Otú ọ dị, n'ezie ihe ngwa ngwa, akọrọ ngwa agha na-emekarị rụrụ na-ekpo ọkụ substrates na elu okpomọkụ (n'elu 40 degrees) n'ọtụtụ gburugburu, dị ka putty plasta na mpụta mgbidi n'okpuru okpomọkụ anyanwụ, nke na-emekarị accelerates siri ike nke ciment na discoloration nke. simenti. obi ike. Ngwa agha akọrọ. Mbelata nke njide mmiri na-eme ka o doo anya na a ga-emetụta ịrụ ọrụ na nkwụsị mgbawa, ọ dịkwa oke mkpa iji belata mmetụta nke ihe okpomọkụ n'okpuru ọnọdụ ndị dị otú ahụ. Ọ bụ ezie na a na-ewere ihe mgbakwunye methylhydroxyethylcellulose ether ugbu a dị ka ndị na-ebute ụzọ na mmepe teknụzụ, ndabere ha na ọnọdụ okpomọkụ ka nwere ike iduga mbelata nke ngwa ngwa akọrọ. Ọ bụ ezie na a na-abawanye usoro onunu ogwu nke methylhydroxyethylcellulose (Xia formula), nhazi na nguzogide mgbape ka enweghị ike igbo mkpa nke ojiji. Site na ụfọdụ ọgwụgwọ pụrụ iche, dị ka ịba ụba nke etherification, wdg, MC nwere ike ịnọgide na-ejigide mmiri dị mma na okpomọkụ dị elu, si otú a na-enye arụmọrụ ka mma n'okpuru ọnọdụ siri ike.
Oge nzipu: Feb-06-2024