Nke ukwuu na viscosity nkeHPMChydroxypropyl methyl cellulose, ka mma na-arụ ọrụ njide mmiri. Viscosity bụ oke dị mkpa nke arụmọrụ HPMC. Ka ọ dị ugbu a, ndị na-emepụta HPMC dị iche iche na-eji ụzọ na ngwa dị iche iche chọpụta viscosity nke HPMC. Ụzọ ndị bụ isi bụ Haake Rotovisko, Hoppler, Ubbelohde na Brookfield, wdg.
Maka otu ngwaahịa ahụ, nsonaazụ nke viscosity tụrụ site na ụzọ dị iche iche dị nnọọ iche, ụfọdụ bụ ọbụna ọtụtụ ọdịiche. Ya mere, mgbe ị na-atụnyere viscosity, a ghaghị ime ya n'etiti otu usoro ule, gụnyere okpomọkụ, rotor, wdg.
N'ihi na urughuru size, mma urughuru, mma na mmiri njigide. Nnukwu ahụ nke cellulose ether kọntaktị na mmiri, n'elu ozugbo igbari na-etolite a jel kechie ihe iji gbochie mmiri ụmụ irighiri ịnọgide na-abanye n'ime, mgbe ụfọdụ ogologo oge na-akpali akpali enweghị ike evenly gbasasịrị etisasịwo, guzobe a apịtị flocculent ngwọta ma ọ bụ. agglomerate. Solubility nke cellulose ether bụ otu n'ime ihe ndị na-ahọrọ cellulose ether. Ịdị mma bụkwa ihe ngosi arụmọrụ dị mkpa nke methyl cellulose ether. MC maka ngwa agha akọrọ chọrọ ntụ ntụ, ọdịnaya mmiri dị ala, yana ịdị mma nke 20% ~ 60% nha nha na-erughị 63um. Fineness na-emetụta solubility nkeHPMChydroxypropyl methyl cellulose ether. Oke MC na-abụkarị granular na enwere ike ịgbaze ngwa ngwa n'ime mmiri na-enweghị agglomerating, mana mgbasa mgbasa na-adị ngwa ngwa, yabụ na ọ naghị adabara iji ngwa ngwa akọrọ. N'ime ngwa agha akọrọ, MC na-agbasasị n'etiti mkpokọta, ihe ndị dị mma na ihe simenti dị ka ciment, na naanị ntụ ntụ nke dị mma nwere ike izere ịchịkọta methyl cellulose ether mgbe ị na-agwakọta mmiri. Mgbe MC gbakwunyere mmiri iji gbazee agglomerate, ọ na-esiri ike ịgbasa na igbari ya. MC nwere ezigbo mma ọ bụghị naanị n'efu, kamakwa na-ebelata ike ngwa agha mpaghara. Mgbe a na-arụ ngwa ngwa akọrọ dị otú ahụ n'ebe buru ibu, a na-ebelata ọsọ nke ngwa ngwa akọrọ na mpaghara, na-ebute mgbawa nke oge ọgwụgwọ dị iche iche kpatara. Maka ngwa agha ịgbasa igwe, n'ihi obere oge ịgwakọta, ịdị mma dị elu.
N'ikwu okwu n'ozuzu, ka viscosity dị elu, ka mma na-ejide mmiri. Otú ọ dị, ka elu viscosity bụ, elu nke molekụla arọ nke MC bụ, na mgbasa arụmọrụ ga-ebelata kwekọrọ ekwekọ, 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 nke kwekọrọ na mmekọrịta ahụ. N'ịdị elu nke viscosity, ngwa agha mmiri ga-adịkwu nro, ma ihe owuwu ahụ, arụ ọrụ nke scraper na-egbuke egbuke na nnukwu nchikota na ihe isi. Mana ọ naghị enye aka ịbawanye ike nhazi nke ngwa agha mmiri. N'oge a na-ewu ụlọ, arụ ọrụ mgbochi sag abụghị ihe doro anya. 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.
A na-agbakwunye cellulose ether na ngwa agha ahụ, na-arụ ọrụ nke ọma na-ejigide mmiri, na-eme ka viscosity dị elu, na-arụ ọrụ njide mmiri dị mma.
Ịdị mma HPMC nwekwara mmetụta ụfọdụ na njide mmiri ya, n'ozuzu na-ekwu okwu, maka otu viscosity na dị iche iche mma nke methyl cellulose ether, n'ihe banyere otu ego nke mgbakwunye, mma mma njide mmiri mmetụta dị mma.
Njide mmiri nke HPMC na-emetụtakwa ọnọdụ okpomọkụ nke ojiji, na njide mmiri nke methyl cellulose ether na-ebelata na ịrị elu nke okpomọkụ. Ma n'ezie ihe ngwa ngwa, ọtụtụ gburugburu nke akọrọ ngwa agha mgbe ga-abụ na elu okpomọkụ (elu 40 degrees) n'okpuru ọnọdụ nke ewu na-ekpo ọkụ mkpụrụ, dị ka okpomọkụ insolation nke mputa mgbidi putty plasta, nke na-emekarị accelerated na solidification nke. simenti na akọrọ ngwa agha hardening. Mbelata nke ọnụ ọgụgụ njide mmiri na-eduga n'echiche doro anya na ma nrụpụta na nkwụsi ike na-emetụta. N'ọnọdụ a, ibelata mmetụta nke ihe okpomọkụ na-aghọ nke dị oke egwu. Ọ bụ ezie na a na-ahụta mgbakwunye nke methyl hydroxyethyl cellulose ether dị ka onye na-ebute ụzọ na mmepe teknụzụ, ịdabere na ọnọdụ okpomọkụ ka ga-eduga na ike ọgwụgwụ nke ngwa ngwa akọrọ. Ọbụlagodi na mmụba nke usoro onunu ogwu methyl hydroxyethyl cellulose (usoro ọkọchị), ihe owuwu na nguzogide mgbawa enweghị ike igbo mkpa nke ojiji. Site na ọgwụgwọ pụrụ iche nke MC, dị ka ịba ụba nke etherification, mmetụta njigide mmiri nke MC nwere ike ịnọgide na-enwe mmetụta dị mma n'okpuru okpomọkụ dị elu, ka o wee nwee ike inye ọrụ ka mma n'okpuru ọnọdụ siri ike.
Oge nzipu: Mee-18-2022