Mmezi nke ihe ndị e ji alụ ọgụ na-enwekwa mmetụta dị iche iche. Ugbu a, ọtụtụ ihe e ji alụ ọgụ na ihe e ji alụ ọgụ anaghị enwe ike ijide mmiri nke ọma, mmiri ahụ ga-ekewapụkwa mgbe nkeji ole na ole gachara. Ya mere, ọ dị oke mkpa itinye cellulose ether na simenti.
Ka anyị lebakwuo anya n'ihe siri ike nke cellulose ether na simenti.
Cellulose ether - njigide mmiri
Idochi mmiri bụ ọrụ dị mkpa nke methyl cellulose ether, ọ bụkwa arụmọrụ nke ọtụtụ ndị na-emepụta ngwa agha akọrọ n'ime ụlọ, ọkachasị ndị nọ na mpaghara ndịda nwere oke okpomọkụ, na-elebara anya na ya.
N'imepụta ihe owuwu ụlọ, karịsịa ngwa agha ntụ ntụ akọrọ, cellulose ether na-arụ ọrụ a na-apụghị ịgbanwe agbanwe, karịsịa n'imepụta ngwa agha pụrụ iche (ngwa agha agbanwere agbanwe), ọ bụ ihe dị oke mkpa ma dị mkpa.
Ọbara mmiri, oke mmiri, okpomọkụ gburugburu na nhazi molekul nke cellulose ether nwere nnukwu mmetụta na arụmọrụ nchekwa mmiri ya. N'otu ọnọdụ ahụ, ka viscosity nke cellulose ether na-akawanye mma, otú ahụ ka nchekwa mmiri ka mma; ka usoro ọgwụgwọ ahụ dị elu, otú ahụ ka nchekwa mmiri ka mma. Ọtụtụ mgbe, obere cellulose ether nwere ike ime ka nchekwa mmiri nke mortar ka mma. Mgbe usoro ọgwụgwọ ahụ ruru otu. Mgbe usoro ọgwụgwọ mmiri na-abawanye, usoro ọgwụgwọ mmiri na-ebelata; mgbe okpomọkụ gburugburu na-arị elu, nchekwa mmiri nke cellulose ether na-ebelatakarị, mana ụfọdụ cellulose ethers agbanwere agbanwe nwekwara nchekwa mmiri ka mma n'okpuru ọnọdụ okpomọkụ dị elu; eriri nwere obere ọkwa nnọchi Vegan ether nwere arụmọrụ nchekwa mmiri ka mma.
Otu hydroxyl dị na molekul ether cellulose na atọm oxygen dị na njikọ ether ga-ejikọta ya na molekul mmiri iji mepụta njikọ hydrogen, na-agbanwe mmiri efu ka ọ bụrụ mmiri ejikọtara, si otú a na-arụ ọrụ dị mma na njigide mmiri; molekul mmiri na cellulose ether molekul yinye Interdiffusion na-enye molekul mmiri ohere ịbanye n'ime cellulose ether macromolecular yinye ma na-enwe ike ijikọ siri ike, si otú a na-emepụta mmiri efu, mmiri kpuchiri ekpuchi, ma na-eme ka njigide mmiri nke simenti dịkwuo mma; cellulose ether na-eme ka slurry simenti ọhụrụ ka mma. Njirimara rheological, nhazi netwọk porous na nrụgide osmotic ma ọ bụ ihe ndị na-emepụta ihe nkiri nke cellulose ether na-egbochi mgbasa nke mmiri.
Cellulose ethers - ihe na-eme ka ọ sie ike ma na-eme ka ọ dị arọ
Cellulose ether na-enye moto mmiri ahụ ezigbo viscosity, nke nwere ike ime ka ikike njikọ dị n'etiti moto mmiri na oyi akwa ntọala dịkwuo elu, ma melite arụmọrụ mgbochi iwụda nke moto ahụ. A na-ejikarị ya eme ihe n'ọtụtụ ebe na moto plastering, moto njikọ brik na sistemụ mkpuchi mgbidi mpụga. Mmetụta siri ike nke cellulose ether nwekwara ike ime ka ikike mgbochi iwụsa na ịdị n'otu nke ihe ndị a gwakọtara ọhụrụ dịkwuo elu, gbochie mmebi ihe, nkewa na ọbara ọgbụgba, enwere ike iji ya na simenti eriri, simenti mmiri na simenti na-akpakọ onwe ya.
Mmetụta siri ike nke cellulose ether na ihe ndị e ji simenti mee na-esi na viscosity nke ihe ngwọta cellulose ether pụta. N'otu ọnọdụ ahụ, ka viscosity nke cellulose ether dị elu, otú ahụ ka viscosity nke ihe e ji simenti emezigharịrị ka mma, mana ọ bụrụ na viscosity dị oke elu, ọ ga-emetụta mmiri na ọrụ nke ihe ahụ (dịka ịrapara mma plastering). Srọt nke na-eme ka ihe dị n'otu na simenti nke na-eme ka ihe dị n'otu, nke chọrọ mmiri dị elu, chọrọ obere viscosity nke cellulose ether. Na mgbakwunye, mmetụta siri ike nke cellulose ether ga-eme ka mmiri chọọ ihe ndị e ji simenti mee ma mee ka mkpụrụ nke simenti dịkwuo elu.
Mmiri mmiri cellulose ether cellulose nwere nnukwu thixotropy, nke bụkwa ihe dị mkpa na cellulose ether. Mmiri mmiri nke methyl cellulose na-enwekarị mmiri mmiri pseudoplastic na nke na-abụghị thixotropic n'okpuru okpomọkụ gel ya, mana ọ na-egosi ihe ndị Newtonian na-agba na obere nha. Pseudoplasticity na-abawanye ka molekul dị arọ ma ọ bụ njupụta nke cellulose ether, n'agbanyeghị ụdị ihe nnọchi na ogo nke nnọchi. Ya mere, cellulose ethers nke otu ọkwa viscosity, n'agbanyeghị MC, HPMC, HEMC, ga-egosipụta otu ihe ndị ahụ ma ọ bụrụhaala na a na-eme ka ntinye na okpomọkụ dịgide. A na-emepụta gels nhazi mgbe okpomọkụ dị elu, mmiri mmiri thixotropic na-apụtakwa.
Oke njupụta na obere viscosity cellulose ethers na-egosi thixotropy ọbụna n'okpuru okpomọkụ gel. Ihe onwunwe a bara uru nke ukwuu na nhazi nke ọkwa na ịda mba na owuwu nke ụlọ. Ọ dị mkpa ịkọwa ebe a na ka viscosity nke cellulose ether dị elu, otú ahụ ka njigide mmiri ka mma, mana ka viscosity dị elu, otú ahụ ka molekul dị arọ nke cellulose ether dị elu, na mbelata kwekọrọ na ya na mmiri, nke nwere mmetụta ọjọọ na ntinye nke moto na arụmọrụ owuwu.
Cellulose ether - mmetụta nke itinye ikuku n'ime
Cellulose ether nwere mmetụta doro anya na-abanye n'ikuku n'ihe ndị e ji simenti ọhụrụ mee. Cellulose ether nwere ma otu hydrophilic (òtù hydroxyl, otu ether) na otu hydrophobic (òtù methyl, mgbanaka glucose), ọ bụkwa ihe na-eme ka a na-ahụ ihe dị n'elu ala, si otú a na-enwe mmetụta na-abanye n'ikuku.
Mmetụta ikuku nke cellulose ether ga-emepụta mmetụta "bọọlụ", nke nwere ike ime ka arụmọrụ ọrụ nke ihe ndị a gwakọtara ọhụrụ ka mma, dị ka ịbawanye ike na ịdị ire ụtọ nke ngwa agha ahụ n'oge ọrụ, nke na-enyere aka ịgbasa ngwa agha ahụ; ọ ga-emekwa ka mmepụta nke ngwa agha ahụ dịkwuo elu, belata ọnụ ahịa mmepụta nke ngwa agha ahụ; mana ọ ga-eme ka porosity nke ihe siri ike dịkwuo elu ma belata ihe onwunwe ya dị ka ike na modulus na-agbanwe agbanwe.
Dịka ihe na-eme ka mmiri dị n'ime mmiri, cellulose ether nwekwara mmetụta mmiri mmiri ma ọ bụ mmanụ n'ahụ ihe ndị e ji simenti mee, nke na-eme ka mmiri mmiri nke ihe ndị e ji simenti mee dịkwuo mma yana mmetụta ikuku ya, mana mmetụta ya nke mmiri mmiri ga-ebelata mmiri mmiri. Mmetụta nke mmiri mmiri bụ njikọta nke mmetụta plastik na mmiri mmiri. N'ikwu ya n'ozuzu, mgbe ọdịnaya nke cellulose ether dị obere nke ukwuu, arụmọrụ bụ isi bụ plastik ma ọ bụ mbelata mmiri; mgbe ọdịnaya dị elu, mmetụta nke cellulose ether na-abawanye ngwa ngwa, mmetụta ya nke ikuku na-abanyekwa na-eju afọ. Ya mere, ọ na-egosi dị ka mmetụta nke mmiri mmiri mmiri ma ọ bụ mmụba na mkpa mmiri.
Cellulose Ether - Nkwụsị
Cellulose ether ga-eme ka oge ntọala nke simenti ma ọ bụ simenti dị ogologo, ma mee ka mmiri simenti ghara ịdị ogologo, nke bara uru ime ka oge ọrụ nke ihe ndị a gwakọtara ọhụrụ ka mma, melite nguzozi nke simenti na mfu nke simenti ka oge na-aga, mana ọ nwekwara ike ime ka ọganihu owuwu ahụ kwụsị.
Oge ozi: Febụwarị-16-2023