Cellulose ether nwere ezigbo nchekwa mmiri, nke nwere ike igbochi mmiri dị na moto mmiri ahụ ka ọ ghara ịpụ apụ tupu oge eruo ma ọ bụ ka oyi akwa ntọala ahụ jupụta, ma hụ na simenti ahụ jupụtara na mmiri, si otú a na-eme ka ihe owuwu moto ahụ sie ike, nke bara uru karịsịa maka moto dị gịrịgịrị na oyi akwa ntọala na-amịkọrọ mmiri ma ọ bụ moto e wuru n'okpuru okpomọkụ dị elu na ọnọdụ kpọrọ nkụ. Mmetụta nchekwa mmiri nke cellulose ether nwere ike ịgbanwe usoro owuwu ọdịnala ma melite ọganihu owuwu ahụ. Dịka ọmụmaatụ, enwere ike ịrụ ọrụ plasta na ihe ndị na-amịkọrọ mmiri na-enweghị mmiri tupu oge eruo.
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 ejikọtara na mmiri jikọtara ọnụ, nke na-eme ka njigide mmiri nke simenti dịkwuo mma; cellulose ether na-eme ka simenti ọhụrụ dịkwuo mma. Njirimara rheological, nhazi netwọk oghere na nrụgide osmotic ma ọ bụ ihe ndị na-emepụta ihe nkiri nke cellulose ether na-egbochi mgbasa nke mmiri.
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.
Ọbara nke ihe ngwọta ether cellulose na-adabere na ihe ndị a: oke molekul nke cellulose ether, ntinye uche, okpomọkụ, ọnụego shear na usoro nnwale. N'otu ọnọdụ ahụ, ka ibu molekul nke cellulose ether na-abawanye, otú ahụ ka viscosity nke ihe ngwọta ahụ dị elu; ka ntinye uche ahụ dị elu, otú ahụ ka viscosity nke ihe ngwọta ahụ dị elu. Mgbe ị na-eji ya, a ga-akpachara anya izere oke dose ma metụta arụmọrụ nke mortar na simenti; cellulose ether Ọbara nke ihe ngwọta ether ga-ebelata ka okpomọkụ na-abawanye, ka ntinye uche ahụ dị elu, otú ahụ ka mmetụta nke okpomọkụ na-abawanye; mmiri cellulose ether na-abụkarị mmiri pseudoplastic nke nwere ihe onwunwe nke shear thinning, ka ọnụego shear na-abawanye n'oge ule ahụ, obere viscosity ahụ, ya mere, njikọ nke mortar ahụ ga-ebelata n'okpuru ọrụ nke ike mpụga, nke bara uru maka owuwu scraping nke mortar ahụ, ka mortar ahụ wee nwee ike ịrụ ọrụ nke ọma na njikọta n'otu oge; n'ihi na ihe ngwọta cellulose ether abụghị nke Newtonian. Maka mmiri mmiri, mgbe usoro nnwale, ngwa na akụrụngwa ma ọ bụ gburugburu nnwale ejiri nwalee viscosity dị iche, nsonaazụ nnwale nke otu ihe ngwọta cellulose ether ga-adị nnọọ iche.
Mkpụrụ ndụ selulose ether nwere ike idozi ụfọdụ mkpụrụ ndụ mmiri nke ihe ọhụrụ dị na mpụta nke yinye molekul, si otú a na-eme ka mmiri ahụ dịkwuo mma. A na-ejikọ usoro molekul nke cellulose ether iji mepụta nhazi netwọk nwere akụkụ atọ, nke ga-emekwa ka mmiri ya nwee ezigbo viscosity.
Mmiri mmiri cellulose ether cellulose nwere nnukwu thixotropy, nke bụkwa ihe dị mkpa na cellulose ether. Mmiri mmiri nke methyl cellulose na-enwekarị mmiri pseudoplastic na nke na-abụghị thixotropic n'okpuru okpomọkụ gel ya, mana ọ na-egosi ihe ndị Newtonian na-asọ asọ 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-anọgide na-etinye njupụta na okpomọkụ. A na-emepụta gels nhazi mgbe a na-ebuli okpomọkụ, mmiri thixotropic na-apụtakwa. Mmiri dị elu 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 ịla n'iyi na owuwu nke ụlọ. Ọ dị mkpa ka a kọwaa ebe a na ka viscosity nke cellulose ether dị elu, otú ahụ ka viscosity nke mmiri si adị mma, mana viscosity nke dị elu, otú ahụ ka molekul nke cellulose ether dị elu, na mbelata kwekọrọ na ya na ike ịgbaze ya, nke nwere mmetụta ọjọọ na ntinye moto na arụmọrụ owuwu. Ka viscosity dị elu, otú ahụ ka mmetụta thickening na moto ahụ na-apụta ìhè, mana ọ bụghị nke zuru oke. Ụfọdụ viscosity dị ọkara na nke dị ala, mana agbanwere cellulose ether nwere arụmọrụ ka mma n'imeziwanye ike nhazi nke moto mmiri. Ka viscosity na-abawanye, viscosity nke cellulose ether na-aka mma.
Oge ozi: Febụwarị-28-2023