Kev faib tawm thiab kev siv hydroxypropyl methylcellulose

HPMC viscosity qis: HPMC 400 feem ntau yog siv rau cov tshuaj mortar tus kheej, tab sis feem ntau yog xa tawm.

Vim li cas: Qhov viscosity qis, txawm hais tias cov dej khaws cia tsis zoo, tab sis qhov leveling zoo, thiab cov mortar ceev yog siab.

Nruab nrab thiab qis viscosity:hydroxypropyl methylcelluloseHPMC 20000-40000 feem ntau yog siv rau cov nplais nplaum, tus neeg sawv cev caulking, cov tshuaj khib tiv thaiv kev tawg, cov tshuaj khib rwb thaiv tsev thermal, thiab lwm yam.

Vim li cas: ua haujlwm tau zoo, ntxiv dej tsawg dua, ua kom cov mortar compact.

1. Lub hom phiaj tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

——A: HPMC siv dav hauv cov ntaub ntawv tsim kho, tshuaj pleev xim, cov khoom siv ua los ntawm cov khoom siv av nplaum, tshuaj, khoom noj, ntaub, kev ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. HPMC tuaj yeem muab faib ua: qib kev tsim kho, qib zaub mov thiab qib tshuaj raws li lub hom phiaj. Tam sim no, feem ntau ntawm cov khoom lag luam hauv tsev yog qib kev tsim kho. Hauv qib kev tsim kho, qhov ntau ntawm cov hmoov putty yog loj heev, kwv yees li 90% yog siv rau hmoov putty, thiab qhov seem yog siv rau cov cement mortar thiab kua nplaum.

2. Muaj ntau hom hydroxypropyl methylcellulose (HPMC), thiab qhov txawv ntawm lawv siv yog dab tsi?

——Teb: HPMC muaj peev xwm muab faib ua hom tam sim ntawd thiab hom kub-yaj. Cov khoom tam sim ntawd-hom tawg sai sai hauv dej txias thiab ploj mus rau hauv dej. Lub sijhawm no, cov kua tsis muaj viscosity, vim HPMC tsuas yog tawg hauv dej thiab tsis muaj kev yaj tiag tiag. Tom qab li 2 feeb, qhov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab viscous colloid. Cov khoom yaj cua sov, thaum ntsib dej txias, tuaj yeem tawg sai sai hauv dej kub, thiab ploj mus rau hauv dej kub. Thaum qhov kub poob rau qee qhov kub (peb lub tuam txhab cov khoom yog 65 degrees Celsius), qhov viscosity maj mam tshwm sim kom txog thaum nws tsim cov pob tshab viscous colloid. Hom kub-yaj tsuas yog siv tau rau hauv hmoov putty thiab mortar. Hauv kua nplaum thiab xim, qhov tshwm sim clumping yuav tshwm sim thiab tsis tuaj yeem siv. Hom tam sim ntawd muaj ntau yam kev siv. Nws tuaj yeem siv rau hauv hmoov putty thiab mortar, nrog rau hauv kua nplaum thiab xim, tsis muaj kev tsis sib haum xeeb.

3. Cov txheej txheem yaj ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

——Teb: Txoj kev yaj dej kub: Vim tias HPMC tsis yaj rau hauv dej kub, HPMC tuaj yeem yaj sib npaug hauv dej kub thaum pib, thiab tom qab ntawd yaj sai thaum txias. Ob txoj kev ib txwm muaj piav qhia raws li hauv qab no:

1) Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom sov txog li 70 ° C. Cov hydroxypropyl methylcellulose maj mam ntxiv nrog kev sib xyaw qeeb qeeb, thaum xub thawj HPMC ntab rau ntawm qhov dej, thiab tom qab ntawd maj mam tsim cov slurry, uas tau txias nrog kev sib xyaw.

2), ntxiv 1/3 lossis 2/3 ntawm cov dej uas xav tau rau hauv lub thawv, thiab ua kom sov txog 70 ° C, raws li txoj kev 1), faib HPMC, npaj cov dej kub slurry; tom qab ntawd ntxiv cov dej txias seem rau hauv dej kub Hauv cov slurry, qhov sib tov tau txias tom qab do.

Txoj kev sib tov hmoov: Sib tov HPMC hmoov nrog ntau yam khoom siv hmoov, sib tov kom huv si nrog lub tshuab sib tov, thiab tom qab ntawd ntxiv dej kom yaj, tom qab ntawd HPMC tuaj yeem yaj tau lub sijhawm no yam tsis muaj kev sib sau ua ke, vim tias tsuas muaj me ntsis HPMC hauv txhua lub ces kaum me me. Cov hmoov yuav yaj tam sim ntawd thaum sib cuag nrog dej. —— Txoj kev no yog siv los ntawm cov tuam txhab tsim hmoov putty thiab mortar. [Hydroxypropyl methylcellulose (HPMC) yog siv ua cov khoom ua kom tuab thiab khaws dej hauv putty hmoov mortar.]

4. Yuav ua li cas txiav txim siab qhov zoo ntawm hydroxypropyl methylcellulose (HPMC) yooj yim thiab intuitively?

——Teb: (1) Dawb: Txawm hais tias dawb tsis tuaj yeem txiav txim siab seb HPMC puas yooj yim siv, thiab yog tias ntxiv cov tshuaj ci rau hauv cov txheej txheem tsim khoom, nws yuav cuam tshuam rau nws qhov zoo. Txawm li cas los xij, feem ntau ntawm cov khoom zoo muaj qhov dawb zoo. (2) Qhov zoo: Qhov zoo ntawm HPMC feem ntau yog 80 mesh thiab 100 mesh, thiab 120 mesh tsawg dua. Feem ntau ntawm HPMC tsim tawm hauv Hebei yog 80 mesh. Qhov zoo dua qhov zoo dua, qhov zoo dua. (3) Kev xa mus: Muab hydroxypropyl methylcellulose (HPMC) rau hauv dej kom tsim cov colloid pob tshab, thiab xyuas nws qhov kev xa mus. Qhov siab dua qhov kev xa mus, qhov zoo dua, qhia tias muaj cov tshuaj tsis yaj tsawg dua hauv nws. Qhov permeability ntawm lub reactor ntsug feem ntau zoo, thiab lub reactor kab rov tav yog qhov phem dua, tab sis nws tsis tuaj yeem hais tias qhov zoo ntawm lub reactor ntsug zoo dua li ntawm lub reactor kab rov tav, thiab muaj ntau yam uas txiav txim siab qhov zoo ntawm cov khoom. (4) Lub ntiajteb txawj nqus tshwj xeeb: qhov loj dua qhov hnyav tshwj xeeb, qhov hnyav dua qhov zoo dua. Qhov hnyav tshwj xeeb yog loj, feem ntau vim tias cov ntsiab lus hydroxypropyl hauv nws siab, thiab cov ntsiab lus hydroxypropyl siab, qhov khaws cia dej zoo dua.

5. Tus nqi ntawm hydroxypropyl methylcellulose (HPMC) hauv cov hmoov putty?

——Teb: Tus nqi ntawm HPMC siv rau hauv kev siv ua haujlwm sib txawv nyob ntawm huab cua, kub, qhov zoo ntawm cov tshauv calcium hauv zos, cov mis ntawm cov hmoov putty thiab "qhov zoo uas cov neeg siv khoom xav tau". Feem ntau hais lus, nws yog ntawm 4 kg thiab 5 kg. Piv txwv li, feem ntau ntawm cov hmoov putty hauv Beijing yog 5 kg; feem ntau ntawm cov hmoov putty hauv Guizhou yog 5 kg thaum lub caij ntuj sov thiab 4.5 kg thaum lub caij ntuj no;

6. Qhov viscosity tsim nyog ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

——Teb: Hmoov Putty feem ntau yog 100,000 yuan, thiab cov tshuaj khib nyiab xav tau ntau dua, thiab nws yooj yim siv ntawm 150,000 yuan. Ntxiv mus, lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC yog khaws dej, ua raws li kev ua kom tuab. Hauv hmoov putty, tsuav yog qhov khaws dej zoo thiab qhov viscosity qis dua (70,000-80,000), nws kuj ua tau. Tau kawg, qhov viscosity siab dua, thiab qhov khaws dej zoo dua. Thaum qhov viscosity tshaj 100,000, qhov cuam tshuam ntawm viscosity rau kev khaws dej tsis ntau.

7. Cov cim qhia tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

——Teb: Cov ntsiab lus Hydroxypropyl thiab viscosity, feem ntau cov neeg siv mob siab txog ob qho cim no. Cov ntsiab lus hydroxypropyl siab dua, qhov zoo dua qhov khaws cia dej. Viscosity siab, khaws cia dej, zoo dua (tsis yog kiag li), thiab viscosity siab, siv zoo dua hauv cov cement mortar.

8. Cov khoom siv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

—— A: Cov khoom siv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC): paj rwb zoo, methyl chloride, propylene oxide, lwm yam khoom siv raw suav nrog flake alkali, acid, toluene, isopropanol, thiab lwm yam.

9. Lub luag haujlwm tseem ceeb ntawm HPMC hauv kev siv hmoov putty yog dab tsi, thiab puas muaj tshuaj lom neeg?

——Teb: HPMC muaj peb lub luag haujlwm ntawm kev ua kom tuab, khaws dej thiab tsim kho hauv cov hmoov putty. Kev ua kom tuab: Cellulose tuaj yeem ua kom tuab kom ncua, khaws cov tshuaj kom sib xws thiab sib xws, thiab tiv taus kev poob qis. Kev khaws dej: Ua kom cov hmoov putty qhuav qeeb qeeb, thiab pab txhawb kev ua haujlwm ntawm cov tshauv calcium hauv qab dej. Kev tsim kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj kev ua haujlwm zoo. HPMC tsis koom nrog hauv kev ua tshuaj lom neeg thiab tsuas yog ua lub luag haujlwm pabcuam. Ntxiv dej rau cov hmoov putty thiab muab tso rau ntawm phab ntsa yog kev ua tshuaj lom neeg. Vim yog kev tsim cov tshuaj tshiab, coj cov hmoov putty ntawm phab ntsa tawm ntawm phab ntsa, zom nws ua hmoov, thiab siv nws dua. Nws yuav tsis ua haujlwm, vim tias cov tshuaj tshiab (calcium carbonate) tau tsim. ) nce. Cov khoom tseem ceeb ntawm cov hmoov tshauv calcium yog: sib xyaw ntawm Ca (OH) 2, CaO thiab me me ntawm CaCO3, CaO + H2O = Ca (OH) 2 —Ca (OH) 2 + CO2 = CaCO3↓ + H2O Cov tshauv calcium hauv dej thiab huab cua Hauv qab qhov kev ua ntawm CO2, calcium carbonate yog tsim, thaum HPMC tsuas yog khaws dej thiab pab txhawb kev ua haujlwm zoo dua ntawm cov tshauv calcium, thiab tsis koom nrog hauv kev ua haujlwm nws tus kheej.

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

- Lus Teb: Hauv cov lus yooj yim, cov non-ions yog cov khoom uas tsis ionize hauv dej. Ionization yog hais txog cov txheej txheem uas electrolyte raug dissociated mus rau hauv cov ions them nyiaj dawb hauv cov kuab tshuaj tshwj xeeb (xws li dej, cawv). Piv txwv li, sodium chloride (NaCl), ntsev noj txhua hnub, yaj hauv dej thiab ionizes los tsim cov sodium ions (Na+) uas txav tau dawb uas muaj nqi zoo thiab chloride ions (Cl) uas muaj nqi tsis zoo. Ntawd yog, thaum HPMC raug muab tso rau hauv dej, nws tsis dissociate mus rau hauv cov ions them, tab sis muaj nyob rau hauv daim ntawv ntawm cov molecules.