Cellulose ethers yog cov khoom tseem ceeb hauv cov khoom cement vim lawv cov thickening, dej-retaining thiab viscosity-kho cov khoom. Kev tswj kom zoo ntawm nws cov khoom yog qhov tseem ceeb los xyuas kom meej qhov zoo ntawm cov khoom cement. Hauv qab no yog qee txoj hauv kev zoo los tswj cov khoom ntawm cellulose ethers hauv cov khoom cement.
1. Xaiv qhov tsim nyog cellulose ether
Thawj kauj ruam hauv kev tswj hwm cellulose ether cov khoom yog xaiv hom cellulose ether tsim nyog rau kev siv. Muaj ntau hom cellulose ethers nyob rau hauv kev ua lag luam, xws li methylcellulose (MC), hydroxyethylcellulose (HEC), hydroxypropylmethylcellulose (HPMC), thiab carboxymethylcellulose (CMC). Txhua hom muaj cov yam ntxwv tshwj xeeb uas ua rau nws haum rau cov ntawv thov tshwj xeeb. Piv txwv li, MC yog haum rau mortars thiab plasters, thaum HPMC yog haum rau grouts thiab pobzeb adhesives. Yog li ntawd, hom cellulose ether yog yuav tsum tau xaiv rau daim ntawv thov npaj.
2. Tswj qhov zoo ntawm cellulose ether
Qhov zoo ntawm cellulose ether muaj feem cuam tshuam rau nws cov khoom. Yog li ntawd, nws yog ib qho tseem ceeb los xyuas kom meej tias cellulose ethers ua tau raws li cov qauv zoo. Qhov zoo ntawm cellulose ethers tuaj yeem tswj tau los ntawm kev saib xyuas nws cov viscosity, noo noo cov ntsiab lus thiab lwm yam khoom ntawm lub cev. Nws tseem yog ib qho tseem ceeb kom ntseeg tau tias cellulose ethers tsis muaj impurities thiab cov kab mob uas tuaj yeem cuam tshuam rau lawv cov kev ua tau zoo.
3. Kev sib xyaw kom raug
Cellulose ethers yuav tsum tau muab sib xyaw kom zoo nrog cov khoom siv cement kom ntseeg tau tias lawv cov khoom tawg thiab kev ua tau zoo. Cov txheej txheem sib tov yuav tsum tau ua los ntawm kev siv cov cuab yeej tsim nyog thiab cov txheej txheem los xyuas kom meej tias cov cellulose ethers tau sib npaug sib npaug thoob plaws hauv cov cement matrix. Cov txheej txheem sib tov yuav tsum tau qeeb thiab maj mam txhawm rau tiv thaiv kev tsim cov pob thiab ua kom tiav kev tawg ntawm cellulose ethers.
4. Kev noj tshuaj zoo tshaj
Qhov ntau npaum ntawm cellulose ether yog qhov tseem ceeb los tswj nws cov khoom hauv cov khoom cement. Qhov txiaj ntsig zoo ntawm cellulose ether nyob ntawm daim ntawv thov tshwj xeeb thiab hom cellulose ether siv. Qhov ntau npaum li cas yuav tsum tau txiav txim siab raws li cov khoom rheological ntawm cov khoom cement. Kev noj ntau dhau lossis tsis txaus ntawm cellulose ether yuav cuam tshuam rau kev ua haujlwm ntawm cov khoom cement.
5. Kev kuaj thiab saib xyuas
Kev ntsuam xyuas thiab saib xyuas kev ua haujlwm ntawm cellulose ethers hauv cov khoom siv cement yog qhov tseem ceeb los xyuas kom meej tias lawv zoo thiab ua haujlwm tau zoo. Cov khoom ntawm cellulose ethers tuaj yeem kuaj tau siv ntau txoj hauv kev, xws li ntsuas rheological, teeb tsa lub sijhawm txiav txim siab, ntsuas lub zog compressive, thiab ntsuas dej tuav. Kev saib xyuas tsis tu ncua ntawm kev ua haujlwm ntawm cellulose ethers hauv cov khoom cement tuaj yeem pab txheeb xyuas txhua yam teeb meem thiab ua kom raug.
Kev tswj cov khoom ntawm cellulose ethers hauv cov khoom cement yog qhov tseem ceeb los xyuas kom meej lawv cov txiaj ntsig zoo. Kev xaiv cov cellulose ethers uas tsim nyog, kev tswj hwm lawv qhov zoo, cov txheej txheem sib xyaw tsim nyog, kev siv ntau npaum li cas, thiab kev soj ntsuam thiab kev saib xyuas yog cov txheej txheem zoo los tswj kev ua haujlwm ntawm cellulose ethers hauv cov khoom cement. Los ntawm kev ua raws li cov lus qhia no, kev ua tau zoo thiab kev ua tau zoo ntawm cellulose ethers hauv cov khoom cement tuaj yeem ua kom ntseeg tau.
Post lub sij hawm: Sep-15-2023