1. Daim ntawv thov tseem ceeb ntawm yog dab tsi?Hydroxypropyl methylcellulose (HPMC)?
Hydroxypropyl methylcellulose siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, cov tshuaj pleev xim, cov khoom siv ua los ntawm cov av nplaum, cov tshuaj pleev ib ce, cov tshuaj, cov khoom noj, cov ntaub, kev ua liaj ua teb, cov tshuaj pleev ib ce, cov luam yeeb thiab lwm yam lag luam. Hydroxypropyl methylcellulose muaj peev xwm muab faib ua qib tsim kho, qib zaub mov thiab qib tshuaj raws li nws daim ntawv thov. Tam sim no, feem ntau ntawm cov khoom lag luam hauv tsev yog qib tsim kho. Hauv qib tsim kho, hmoov putty siv ntau 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 sib txawv ntawm lawv siv yog dab tsi?
HPMC muaj peev xwm muab faib ua hom tam sim ntawd thiab hom kub yaj. Cov khoom hom tam sim ntawd tawg sai sai thaum lawv ntsib dej txias thiab ploj mus rau hauv dej. Lub sijhawm no, cov kua tsis muaj viscosity vim HPMC tsuas yog tawg hauv dej yam tsis muaj kev yaj tiag tiag. Tom qab li 2 feeb, qhov viscosity ntawm cov kua maj mam nce, tsim cov colloid viscous pob tshab. Cov khoom kub yaj, 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, qhov viscosity yuav maj mam tshwm sim kom txog thaum nws tsim cov colloid viscous pob tshab. Hom kub yaj tsuas yog siv tau rau hauv hmoov putty thiab mortar. Hauv kua nplaum thiab xim, yuav muaj qhov tshwm sim sib sau ua ke 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 kua nplaum thiab xim, tsis muaj kev tsis sib haum xeeb.
3. Cov txheej txheem yaj ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?
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 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 rau hauv qab qeeb qeeb, thaum xub thawj HPMC ntab rau saum npoo dej, thiab tom qab ntawd maj mam tsim cov slurry, uas tau txias hauv qab nplawm.
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 kom npaj cov dej kub slurry; tom qab ntawd ntxiv cov dej txias seem rau hauv cov dej kub slurry, qhov sib tov tau txias tom qab do.
Txoj kev sib tov hmoov: sib tov HPMC hmoov nrog ntau yam hmoov sib xyaw, sib tov kom huv si nrog lub tshuab sib tov, thiab tom qab ntawd ntxiv dej kom yaj, ces 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 Hmoov, yuav yaj tam sim ntawd thaum sib cuag nrog dej. —— Cov chaw tsim khoom hmoov putty thiab mortar siv txoj kev no. [Hydroxypropyl methylcellulose (HPMC) yog siv los ua cov khoom siv 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?
(1) Kev dawb: Txawm hais tias kev dawb tsis tuaj yeem txiav txim siab seb HPMC puas yooj yim siv, thiab yog tias cov neeg sawv cev dawb ntxiv thaum lub sijhawm tsim khoom, nws yuav cuam tshuam rau nws qhov zoo. Txawm li cas los xij, feem ntau ntawm cov khoom zoo muaj kev dawb zoo.
(2) Kev Zoo: Qhov zoo ntawm HPMC feem ntau muaj 80 mesh thiab 100 mesh, 120 mesh tsawg dua, thiab feem ntau HPMC tsim tawm hauv Hebei yog 80 mesh. Qhov zoo dua qhov zoo, feem ntau hais lus, qhov zoo dua.
(3) Kev Sib Kis: Muab hydroxypropyl methylcellulose (HPMC) rau hauv dej kom ua rau cov colloid pob tshab, thiab xyuas nws qhov kev sib kis. Qhov kev sib kis siab dua, qhov zoo dua, qhia tias muaj tsawg dua insoluble hauv nws. Qhov permeability ntawm cov reactors ntsug feem ntau zoo, thiab ntawm cov reactors kab rov tav yog qhov phem dua, tab sis nws tsis txhais tau tias qhov zoo ntawm cov reactors ntsug zoo dua li ntawm cov reactors kab rov tav, thiab qhov zoo ntawm cov khoom yog txiav txim siab los ntawm ntau yam.
(4) Qhov hnyav tshwj xeeb: Qhov hnyav tshwj xeeb loj dua, qhov hnyav dua qhov zoo dua. Qhov tshwj xeeb loj, feem ntau vim tias cov ntsiab lus ntawm hydroxypropyl pawg hauv nws siab, thiab cov ntsiab lus ntawm hydroxypropyl pawg siab, cov dej khaws cia zoo dua.
5. Muaj pes tsawg hydroxypropyl methylcellulose (HPMC) nyob rau hauv cov hmoov putty?
Tus nqi ntawm HPMC siv rau hauv kev siv tiag tiag 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, 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; tus nqi ntawm cov hmoov putty hauv Yunnan yog qhov me me, feem ntau 3 kg txog 4 kg, thiab lwm yam.
6. Qhov viscosity tsim nyog ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?
Feem ntau cov hmoov putty txaus rau 100,000 yuan, thiab qhov yuav tsum tau rau cov mortar yog siab dua, thiab 150,000 yuan yog xav tau rau kev siv yooj yim. Ntxiv mus, qhov tseem ceeb tshaj plaws ntawm HPMC yog kev khaws dej, ua raws li kev tuab. Hauv cov hmoov putty, tsuav yog qhov khaws dej zoo thiab qhov viscosity qis (70,000-80,000), nws kuj ua tau. Tau kawg, qhov siab dua qhov viscosity, qhov zoo dua qhov khaws dej. Thaum qhov viscosity tshaj 100,000, qhov viscosity yuav cuam tshuam rau qhov khaws dej. Tsis ntau lawm.
7. Cov cim qhia tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?
Cov ntsiab lus Hydroxypropyl thiab viscosity, feem ntau cov neeg siv txhawj xeeb txog ob qho cim no. Cov neeg uas muaj cov ntsiab lus hydroxypropyl siab feem ntau muaj kev khaws cia dej zoo dua. Ib qho uas muaj viscosity siab muaj kev khaws cia dej zoo dua, piv rau (tsis yog kiag li), thiab ib qho uas muaj viscosity siab zoo dua siv rau hauv cov cement mortar.
8. Cov khoom siv tseem ceeb ntawm cov khoom no yog dab tsi?Hydroxypropyl methylcellulose (HPMC)?
Cov khoom siv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC): paj rwb zoo, methyl chloride, propylene oxide, thiab lwm yam khoom siv raw, caustic soda, acid, toluene, isopropanol, thiab lwm yam.
9. Lub luag haujlwm tseem ceeb ntawm daim ntawv thov HPMC hauv cov hmoov putty yog dab tsi, thiab nws puas tshwm sim los ntawm tshuaj lom neeg?
Hauv cov hmoov putty, HPMC ua peb lub luag haujlwm ntawm kev ua kom tuab, khaws dej thiab tsim kho. Kev ua kom tuab: Cellulose tuaj yeem ua kom tuab kom ncua thiab khaws cov tshuaj sib xws nce thiab nqis, thiab tiv taus kev poob qis. Kev khaws dej: ua kom cov hmoov putty qhuav qeeb qeeb, thiab pab cov tshauv calcium kom ua haujlwm raws li 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 kev tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm pabcuam. Ntxiv dej rau cov hmoov putty thiab muab tso rau ntawm phab ntsa yog kev tshuaj lom neeg, vim tias cov tshuaj tshiab tau tsim. Yog tias koj tshem cov hmoov putty ntawm phab ntsa 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.) ib yam nkaus. Cov khoom tseem ceeb ntawm cov hmoov tshauv calcium yog: sib xyaw ntawm Ca (OH) 2, Ca O thiab me me ntawm CaCO3, CaO + H2O = Ca (OH) 2—Ca (OH) 2 + CO2 = CaCO3↓ + H2O Cov calcium tshauv nyob hauv dej thiab huab cua Hauv qab qhov kev ua ntawm CO2, calcium carbonate yog tsim, thaum HPMC tsuas yog khaws dej, pab txhawb kev tshuaj tiv thaiv zoo dua ntawm cov tshauv calcium, thiab tsis koom nrog hauv kev tshuaj tiv thaiv nws tus kheej.
10. HPMC yog ib qho non-ionic cellulose ether, yog li ntawd non-ionic yog dab tsi?
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 uas tuaj yeem txav mus los tau yooj yim hauv cov kuab tshuaj tshwj xeeb (xws li dej, cawv). Piv txwv li, sodium chloride (NaCl), cov ntsev peb noj txhua hnub, yaj hauv dej thiab ionizes los tsim cov sodium ions (Na+) uas muaj nqi zoo thiab chloride ions (Cl) uas muaj nqi tsis zoo. Uas yog hais tias, thaumHPMCyog muab tso rau hauv dej, nws yuav tsis tawg ua cov ions uas raug them, tab sis nws yuav muaj nyob rau hauv daim ntawv ntawm cov molecules.
Lub sijhawm tshaj tawm: Plaub Hlis-28-2024