Kev siv HPMC hauv cov hmoov nplej

1. Qhov viscosity ntawm HPMC yog dab tsi?

—— Lus Teb: Feem ntau, 100,000 yuan yog txaus rau putty hmoov. Qhov yuav tsum tau ua rau mortar yog siab dua, thiab 150,000 yuan yuav tsum tau siv yooj yim. Ntxiv mus, qhov tseem ceeb tshaj plaws ua haujlwm ntawm HPMC yog dej tuav, ua raws li thickening. Hauv cov hmoov putty, tsuav yog cov dej tuav tau zoo thiab cov viscosity tsawg (70,000-80,000), kuj tseem tuaj yeem ua tau. Tau kawg, qhov siab dua qhov viscosity, qhov zoo dua qhov txheeb ze dej tuav. Thaum lub viscosity siab tshaj 100,000, lub viscosity yuav cuam tshuam cov dej tuav. Tsis ntau ntxiv lawm.

2. Dab tsi yog lub ntsiab lus qhia ntawmHPMC?

—— Lus Teb: Hydroxypropyl cov ntsiab lus thiab viscosity, cov neeg siv feem ntau txhawj xeeb txog ob qhov ntsuas no. Cov uas muaj hydroxypropyl cov ntsiab lus siab feem ntau muaj cov dej tuav tau zoo dua. Ib qho uas muaj viscosity siab tau zoo dua dej tuav, kuj (tsis yog kiag li), thiab ib qho uas muaj viscosity siab yog zoo siv hauv cov cement mortar.

3. Lub luag haujlwm tseem ceeb ntawm kev thov HPMC hauv cov hmoov putty yog dab tsi, thiab nws puas tshwm sim tshuaj?

—— Lus Teb: Hauv cov hmoov putty, HPMC plays peb lub luag hauj lwm ntawm thickening, dej tuav thiab kev tsim kho. Thickening: Cellulose tuaj yeem ua kom tuab kom tshem tawm thiab ua kom cov tshuaj sib txawv nce thiab nqis, thiab tiv thaiv sagging. Kev tuav dej: ua kom cov hmoov putty qhuav maj mam, thiab pab cov hmoov tshauv calcium kom hnov ​​​​mob hauv qab dej. Kev tsim kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj kev tsim kho zoo. HPMC tsis koom nrog cov tshuaj tiv thaiv, tab sis tsuas yog ua lub luag haujlwm pabcuam. Ntxiv dej rau cov hmoov putty thiab muab tso rau ntawm phab ntsa yog cov tshuaj tiv thaiv, vim hais tias cov tshuaj tshiab yog tsim. Yog tias koj tshem cov hmoov putty rau ntawm phab ntsa ntawm phab ntsa, zom rau hauv cov hmoov, thiab siv nws dua, nws yuav tsis ua haujlwm vim tias cov tshuaj tshiab (calcium carbonate) tau tsim. ) thiab. Cov ntsiab lus tseem ceeb ntawm cov hmoov tshauv calcium hmoov yog: sib tov ntawm Ca (OH) 2, CaO thiab ib qho me me ntawm CaCO3, CaO + H2O = Ca(OH) 2 -Ca(OH) 2 + CO2 = CaCO3↓ + H2O tshauv calcium yog nyob rau hauv dej thiab huab cua nyob rau hauv qhov kev txiav txim ntawm CO2, calcium carbonate yog generated, thaum dej, HPMC tsuas yog khaws cov tshuaj calcium zoo dua. tej yam tshuaj tiv thaiv nws tus kheej.

4. HPMC yog non-ionic cellulose ether, yog li dab tsi yog non-ionic?

—— Lus Teb: Nyob rau hauv layman cov ntsiab lus, non-ions yog cov khoom uas yuav tsis ionize nyob rau hauv dej. Ionization yog hais txog cov txheej txheem uas ib qho electrolyte dissociated rau hauv ions them uas tuaj yeem txav mus los ntawm cov kuab tshuaj tshwj xeeb (xws li dej, cawv). Piv txwv li, sodium chloride (NaCl), ntsev uas peb noj txhua hnub, yaj hauv dej thiab ionizes los tsim cov sodium ions (Na +) uas muaj txiaj ntsig zoo thiab cov tshuaj chloride ions (Cl) uas tsis zoo. Uas yog hais tias, thaum HPMC muab tso rau hauv dej, nws yuav tsis dissociate rau ions them, tab sis muaj nyob rau hauv daim ntawv ntawm molecules.

5. Puas muaj kev sib raug zoo ntawm kev poob ntawm cov hmoov putty thiab HPMC?

—— Teb: Cov hmoov poob ntawm putty hmoov yog feem ntau cuam tshuam rau qhov zoo ntawm cov hmoov tshauv calcium, thiab muaj me ntsis ua rau HPMC. Cov ntsiab lus calcium uas tsis tshua muaj ntawm cov calcium grey thiab qhov tsis zoo ntawm CaO thiab Ca (OH) 2 hauv cov calcium grey yuav ua rau cov hmoov poob. Yog tias nws muaj qee yam ua rau HPMC, ces yog tias cov dej khaws cia ntawm HPMC tsis zoo, nws tseem yuav ua rau hmoov poob.

6. Yuav ua li cas xaiv qhov haumHPMCrau lub hom phiaj sib txawv?

—— Lus Teb: Daim ntawv thov ntawm cov hmoov putty: cov kev xav tau kuj tsawg, thiab cov viscosity yog 100,000, uas yog txaus. Qhov tseem ceeb yog khaws cov dej kom zoo. Daim ntawv thov ntawm mortar: siab dua, siab viscosity, 150,000 zoo dua. Daim ntawv thov ntawm cov kua nplaum: cov khoom siv tam sim nrog cov viscosity siab yog yuav tsum tau.