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01. Kev Taw Qhia Txog cellulose Cellulose yog ib qho polysaccharide macromolecular uas muaj glucose. Insoluble hauv dej thiab cov organic solvents dav dav. Nws yog lub ntsiab lus tseem ceeb ntawm cov nroj tsuag cell phab ntsa, thiab nws kuj yog qhov feem ntau faib thiab muaj ntau tshaj plaws polysaccharide hauv xwm. Cellulose yog qhov feem ntau ...Nyeem ntxiv»
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Hauv cov mortar sib xyaw ua ke, tsuav yog me ntsis cellulose ether tuaj yeem txhim kho qhov ua tau zoo ntawm cov mortar ntub, nws tuaj yeem pom tias cellulose ether yog cov khoom siv tseem ceeb uas cuam tshuam rau kev ua tau zoo ntawm cov mortar. "Kev xaiv ntawm ntau hom sib txawv, ntau yam viscosities, sib txawv ...Nyeem ntxiv»
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EPS granular thermal rwb thaiv tsev mortar yog cov khoom siv rwb thaiv tsev thermal sib xyaw nrog cov inorganic binders, organic binders, admixtures, additives thiab aggregates sib xyaw ua ke hauv qee qhov sib piv. Ntawm cov EPS granular thermal rwb thaiv tsev mortars tam sim no tshawb fawb thiab siv, nws tuaj yeem rov ua dua ...Nyeem ntxiv»
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Cellulose ether yog ib qho polymer uas tsis yog ionic semi-synthetic, uas yog dej-soluble thiab solvent-soluble. Nws muaj cov teebmeem sib txawv hauv ntau yam lag luam. Piv txwv li, hauv cov ntaub ntawv siv tshuaj lom neeg, nws muaj cov teebmeem sib xyaw ua ke hauv qab no: ① Tus neeg sawv cev khaws dej ② Thickener ③ Leveling ④ Zaj duab xis tsim...Nyeem ntxiv»
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Keeb Kwm Kev Tshawb Fawb Raws li ib qho khoom siv ntuj, muaj ntau thiab rov ua dua tshiab, cellulose ntsib teeb meem loj hauv kev siv ua haujlwm vim nws cov khoom tsis yaj thiab cov khoom solubility tsawg. Cov crystallinity siab thiab cov hydrogen bonds ceev ceev hauv cov qauv cellulose ua rau nws lwj tab sis tsis yog kuv ...Nyeem ntxiv»
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Raws li cov khoom sib xyaw tseem ceeb tshaj plaws hauv kev tsim cov khoom siv mortar qhuav, cellulose ether ua lub luag haujlwm tseem ceeb hauv kev ua tau zoo thiab tus nqi ntawm cov mortar qhuav. Muaj ob hom cellulose ethers: ib qho yog ionic, xws li sodium carboxymethyl cellulose (CMC), thiab lwm qhov yog non-ionic, xws li methyl ...Nyeem ntxiv»
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Cellulose ether yog ib qho polymer uas tsis yog ionic semi-synthetic, uas yog dej-soluble thiab solvent-soluble. Nws muaj cov teebmeem sib txawv hauv ntau yam lag luam. Piv txwv li, hauv cov ntaub ntawv siv tshuaj lom neeg hauv tsev, nws muaj cov teebmeem sib xyaw ua ke hauv qab no: ① tus neeg sawv cev khaws dej ② thickener ③ leveling khoom ④ zaj duab xis-...Nyeem ntxiv»
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Kev txhim kho cov khoom ntawm cov mortar kuj muaj ntau yam teebmeem sib txawv. Tam sim no, ntau cov masonry thiab plastering mortars muaj kev ua haujlwm tsis zoo ntawm kev khaws dej, thiab cov dej slurry yuav sib cais tom qab ob peb feeb ntawm kev sawv. Yog li nws yog ib qho tseem ceeb heev uas yuav tsum ntxiv cellulose ether rau hauv cov cement mortar. Cia peb ...Nyeem ntxiv»
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Cellulose ether yog ib qho polymer uas tsis yog ionic semi-synthetic siab molecular, uas yog dej-soluble thiab solvent-soluble. Nws muaj cov teebmeem sib txawv hauv ntau yam lag luam. Piv txwv li, hauv cov ntaub ntawv siv tshuaj lom neeg hauv tsev, nws muaj cov teebmeem sib xyaw ua ke hauv qab no: ① Tus neeg sawv cev khaws dej ② Tus neeg ua kom tuab ③ Leveling prop...Nyeem ntxiv»
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Hydroxypropyl methylcellulose yog ib qho cellulose ether uas tsis yog ionic tau los ntawm paj rwb zoo, ib yam khoom siv polymer ntuj, los ntawm ntau yam txheej txheem tshuaj lom neeg. Feem ntau siv rau hauv kev lag luam kev tsim kho: hmoov putty uas tiv taus dej, putty paste, tempered putty, kua nplaum xim, masonry plastering mortar ...Nyeem ntxiv»
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1. Hmoov putty qhuav sai Teb: Qhov no feem ntau yog cuam tshuam nrog kev ntxiv cov tshauv calcium thiab qhov ceev ntawm cov fiber, thiab kuj cuam tshuam nrog qhov qhuav ntawm phab ntsa. 2. Hmoov putty tev tawm thiab dov Teb: Qhov no yog cuam tshuam nrog qhov ceev ntawm kev khaws dej, uas yooj yim tshwm sim thaum ...Nyeem ntxiv»
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Methylcellulose (MC) Cov mis molecular ntawm methylcellulose (MC) yog: [C6H7O2(OH)3-h(OCH3)n\]x Cov txheej txheem ntau lawm yog ua cellulose ether los ntawm ntau yam kev tshuaj tiv thaiv tom qab cov paj rwb ua kom zoo raug kho nrog alkali, thiab methyl chloride yog siv los ua tus neeg sawv cev etherification. Feem ntau, qhov degr...Nyeem ntxiv»