Cov cellulose ethers, tshwj xeeb tshaj yog hypromellose ethers, yog cov khoom tseem ceeb ntawm cov khoom lag luam mortars. Rau cellulose ether, nws cov viscosity yog qhov tseem ceeb ntawm cov tuam txhab tsim khoom mortar, viscosity siab yuav luag dhau los ua qhov kev thov tseem ceeb ntawm kev lag luam mortar. Vim yog kev cuam tshuam ntawm thev naus laus zis, txheej txheem thiab khoom siv, nws nyuaj rau lav qhov viscosity siab ntawm domesticcellulose ethercov khoom lag luam ntev. Cellulose ether yog siv los ua tus neeg sawv cev khaws dej, thickener thiab binder hauv cov khoom mortar, uas muaj kev cuam tshuam loj rau kev ua haujlwm, viscosity ntub, lub sijhawm ua haujlwm thiab hom kev tsim kho ntawm lub cev mortar. Cov haujlwm no feem ntau yog ua tiav los ntawm hydrogen bond ntawm cellulose ether molecule thiab dej molecule thiab qhov kev ua haujlwm winding ntawm cellulose ether molecule, qhov tseeb, nws siv ib feem ntawm hydrogen bond hauv cellulose ether molecular saw thiab ua rau lub zog ntawm cellulose ether tsis muaj zog, uas ua rau lub zog khaws dej thiab ntub ntawm cellulose ether tsis muaj zog. Cov chaw tsim khoom mortar feem ntau tsis hnov qhov no, ntawm ib sab tes, cov khoom lag luam mortar hauv tsev tseem tsis tau ceev faj, tseem tsis tau ceev faj kom them sai sai rau theem ntawm kev ua haujlwm, ntawm qhov tod tes, peb xaiv qhov viscosity siab dua li qhov kev xav tau viscosity, qhov no kuj tau them rau qhov poob ntawm kev khaws dej, tab sis hauv qhov ntub dej puas tsuaj.
Kev ua tau zoo ntawm cov mortar yog cuam tshuam los ntawm cellulose ether uas muaj cov kua nplaum extractant hauv cov txheej txheem ntau lawm, hauv daim ntawv no, qhov sib txawv ntawm lub zog nplaum tensile ntawm cov khoom cellulose thiab cov khoom cellulose ether ntxiv nrog tackifier hauv cov nplais pobzeb ceramic tau txheeb xyuas los ntawm kev sim. Tackifier yog ib hom khoom ntxiv los ntawm qee cov chaw tsim khoom cellulose ether txhawm rau ua kom muaj qhov tsis txaus ntawm cov thev naus laus zis tsim khoom, thev naus laus zis thiab khoom siv. Qhov muaj tackifier ua rau cov saw ntev ntawm cellulose ether cross-link thiab ua zoo li net, uas cuam tshuam rau qhov ceev ntawm cellulose ether zaj duab xis tsim thiab lub xeev ntawm zaj duab xis, yog li cuam tshuam rau lub luag haujlwm ntawm cellulose ether hauv mortar, qhov cuam tshuam ncaj qha yog: lub zog nplaum tensile tau hloov pauv nyob rau hauv txhua qhov xwm txheej kho; lub sijhawm teeb tsa ntawm mortar yog ntev.
1. Nyob rau hauv tus qauv kho mob, qhov ntxiv ntawm tackifier thiab cellulose ether tsis muaj tackifier hauv cov txheej txheem ntau lawm muaj qee qhov cuam tshuam rau lub zog tensile ntawm cov nplais pobzeb nplaum, cov khoom ntxiv nrog tackifier hauv cov txheej txheem ntau lawm muaj lub zog tensile nplaum siab.
2. Hauv qhov tsis kam dej, lub zog tensile nplaum ntawm cov nplais pobzeb ceramic nrog cellulose ether ntxiv tackifier hauv cov txheej txheem ntau lawm yog qhov phem dua li cov khoom tsis muaj tackifier hauv cov txheej txheem ntau lawm ib txwm, cov cellulose ether uas muaj tackifier cuam tshuam rau qhov tsis kam dej ntawm cov nplais pobzeb.
3. Nyob rau hauv cov nqe lus ntawm lub sijhawm teeb tsa cua,cellulose ethernrog tackifier tau siv rau hauv cov nplais nplaum, nws lub zog tensile nplaum qis dua li ntawm cov khoom tsis muaj tackifier, thiab lub sijhawm qhib tau luv dua.
4. Raws li lub sijhawm teeb tsa, qhov ceev kho ntawm cellulose ether ceramic pobzeb nplaum yam tsis ntxiv tackifier nyob rau hauv cov txheej txheem tsim khoom ib txwm yog sai dua. Hauv kev xaus, qhov muaj tackifier, qhov kev ua haujlwm sib txuas ua rau cov kua dej cellulose ether muaj kev cuam tshuam steric siab dua, uas tau pom tias siab dua hauv kev sim, tab sis qhov muaj tackifier cuam tshuam rau ntau yam khoom siv tseem ceeb ntawm cellulose ether, xws li kev tiv thaiv dej, lub sijhawm qhib, kev ntub dej thiab lwm yam. Qhov tseeb, viscosity tsuas yog ib qho ntawm cov ntsuas kev ua tau zoo ntawm cellulose ether, viscosity tsis yog qhov ntsuas tseem ceeb rau kev ua tau zoo ntawm cellulose ether, tab sis hom thiab cov ntsiab lus ntawm cov pab pawg yuav tsum yog qhov tseem ceeb ntawm cov chaw tsim khoom mortar.
5. Nws kuj yog vim tias cov chaw tsim khoom siv mortar them sai sai rau viscosity, ua rau qee lub tuam txhab tsim khoom cellulose ether kom nce viscosity los ntawm cov ntaub ntawv ntxiv kom ua tau raws li qhov xav tau ntawm cov chaw tsim khoom siv mortar, thiab cov khoom no tsuas muaj viscosity siab pom tseeb, nws cov kev ua tau zoo yog qhov tsim nyog rau cov neeg siv mloog, thiab viscosity siab pom tseeb tsim los ntawm kev nce viscosity tsis tuaj yeem ua tiav "High viscosity qis cov ntsiab lus" txoj kev xav uas cov chaw tsim khoom siv mortar xav tau, tab sis tsis muaj nyob hauv qhov tseeb. Txhawm rau xaiv cellulose ether, uas yog cov khoom siv raw tseem ceeb hauv mortar, cov tuam txhab mortar nrhiav kev zoo thiab ruaj khov yuav tsum paub qee cov ntaub ntawv tom qab, qhov no yuav pab tau rau cov chaw tsim khoom los tsim cov khoom ua tau zoo, kom ntseeg tau tias cov khoom zoo ruaj khov.
Lub sijhawm tshaj tawm: Lub Xya Hli-17-2023