Cellulose ether bụ ngwakọta polymer nke sitere na cellulose eke sitere na usoro etherification, ma bụrụ ezigbo onye na-ejigide mmiri na mmiri.
Ihe ndabere nyocha
A na-eji cellulose ethers mee ihe na ngwa agha akọrọ akọrọ na afọ ndị na-adịbeghị anya, nke a na-ejikarị eme ihe bụ ụfọdụ ethers cellulose na-abụghị ionic, gụnyere methyl cellulose ether (MC), hydroxyethyl cellulose ether (HEC), hydroxyethyl cellulose ether Methyl cellulose ether (HEMC). ) na hydroxypropyl methyl cellulose ether (HPMC).Ka ọ dị ugbu a, enweghi ọtụtụ akwụkwọ na usoro nha nke viscosity nke cellulose ether ngwọta.Na mba anyị, naanị ụfọdụ ụkpụrụ na monographs na-akọwapụta usoro nnwale nke viscosity nke cellulose ether ngwọta.
Usoro nkwadebe nke cellulose ether ngwọta
Nkwadebe nke Methyl Cellulose Ether Solution
Methyl cellulose ethers na-ezo aka cellulose ethers nwere methyl otu na molekul, dị ka MC, HEMC na HPMC.N'ihi hydrophobicity nke ìgwè methyl, ihe ngwọta cellulose ether nwere methyl nwere ihe ndị na-ekpo ọkụ na-ekpo ọkụ, ya bụ, ha na-adịghị edozi na mmiri ọkụ na okpomọkụ dị elu karịa gelation okpomọkụ (ihe dị ka 60-80 ° C).Iji gbochie cellulose ether ngwọta site na-akpụ agglomerates, kpoo mmiri ahụ n'elu gel okpomọkụ, ihe dị ka 80 ~ 90 Celsius C, tinyezie ntụ ntụ cellulose ether n'ime mmiri ọkụ, kpalie ịgbasa, nọgide na-akpali akpali ma dị jụụ na setịpụ. okpomọkụ, ọ nwere ike kwadebere n'ime a edo cellulose ether ngwọta.
Njirimara solubility nke ethers nwere methylcellulose anaghị agwọ ya
Iji zere agglomeration nke cellulose ether n'oge usoro mgbasa, ndị na-emepụta mgbe ụfọdụ na-eme ọgwụgwọ elu kemịkalụ na ngwaahịa cellulose ether powdered iji gbuo oge mgbasa.Usoro mgbasa ya na-eme mgbe ether cellulose gbasasịrị kpamkpam, n'ihi ya, enwere ike ịgbasa ya ozugbo na mmiri oyi na uru pH na-anọpụ iche na-enweghị ịmepụta agglomerates.Dị elu pH uru nke ngwọta, nkenke oge mgbasa nke cellulose ether na-egbu oge mgbasa Njirimara.Gbanwee uru pH nke ngwọta na uru dị elu.Alkalinity ga-ewepụ solubility na-egbu oge nke cellulose ether, na-eme ka ether cellulose na-emepụta agglomerates mgbe ọ na-agbaze.Ya mere, uru pH nke ngwọta kwesịrị ibuli ma ọ bụ wedata mgbe ether cellulose gbasasịrị kpamkpam.
Njirimara solubility nke elu-agwọ methylcellulose nwere ethers
Nkwadebe nke Hydroxyethyl Cellulose Ether Solution
Hydroxyethyl cellulose ether (HEC) ngwọta enweghị ihe onwunwe nke thermal gelation, ya mere, HEC na-enweghị ọgwụgwọ elu ga-etolite agglomerates na mmiri ọkụ.Ndị na-emepụta ihe n'ozuzu na-eme ọgwụgwọ elu kemịkalụ na HEC powdered ka ọ na-egbu oge mgbasa, nke mere na ọ nwere ike gbasaa ozugbo na mmiri oyi na uru pH na-anọpụ iche na-enweghị ịmepụta agglomerates.N'otu aka ahụ, na ngwọta nke nwere nnukwu alkalinity, HEC Ọ nwekwara ike ịmepụta agglomerates n'ihi na-egbu oge solubility ọnwụ.Ebe ọ bụ na ciment slurry bụ alkaline mgbe hydration na pH uru nke ngwọta dị n'etiti 12 na 13, mgbasa ọnụego nke elu-emeso cellulose ether na ciment slurry dịkwa nnọọ ngwa ngwa.
Njirimara solubility nke elu-emeso HEC
Mmechi na nyocha
1. Usoro mgbasa ozi
Iji zere mmetụta ọjọọ na oge ule n'ihi nkwụsị ngwa ngwa nke ihe ngwọta nke elu, a na-atụ aro iji mmiri ọkụ maka nkwadebe.
2. Usoro jụrụ oyi
Ekwesịrị ịkpali ihe ngwọta cellulose ether ma mee ka ọ dị jụụ na ọnọdụ okpomọkụ iji belata ọnụego jụrụ oyi, nke chọrọ ogologo oge ule.
3. Usoro mkpali
Mgbe agbakwunyere cellulose ether na mmiri ọkụ, jide n'aka na ị na-akpali akpali.Mgbe mmiri mmiri na-adaba n'okpuru okpomọkụ gel, cellulose ether ga-amalite ịgbaze, ngwọta ahụ ga-eji nwayọọ nwayọọ ghọọ viscous.N'oge a, ekwesịrị ibelata ọsọ mkpali.Mgbe ngwọta ahụ ruru ụfọdụ viscosity, ọ ga-adị mkpa ka ọ kwụrụ otu ebe ihe karịrị awa 10 tupu afụ ahụ ji nwayọọ nwayọọ na-ese n'elu elu ka ọ gbawaa wee pụọ.
Afụ ikuku na Cellulose Ether Solution
4. Usoro hydrating
Ekwesịrị ịlele ogo cellulose ether na mmiri n'ụzọ ziri ezi, ma gbalịa ka ị ghara ichere ka ngwọta ahụ ruo elu viscosity dị elu tupu ịmaliteghachi mmiri.
5. Nnwale viscosity
N'ihi thixotropy nke cellulose ether solution, mgbe ị na-anwale viscosity ya, mgbe a na-etinye rotor nke viscometer rotational na ngwọta, ọ ga-akpaghasị ngwọta ahụ ma na-emetụta nsonaazụ nha.Ya mere, mgbe etinyere rotor na ngwọta, a ga-ahapụ ya ka ọ guzoro maka 5 min tupu ule.
Oge nzipu: Mar-22-2023