1. Daim ntawv thov tseem ceeb ntawm yog dab tsi?Hydroxypropyl methylcellulose (HPMC)?
HPMC siv dav hauv cov ntaub ntawv siv hauv kev 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 muaj peev xwm muab faib ua qib 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 tsim kho. Hauv qib tsim kho, hmoov putty siv ntau heev, kwv yees li 90% siv rau hmoov putty, thiab qhov seem siv rau cov cement mortar.
2. Hydroxypropyl methylcellulose (HPMC) muaj ntxhiab li cas?
Cov HPMC uas tsim los ntawm txoj kev siv cov tshuaj yaj siv toluene thiab isopropanol ua cov tshuaj yaj. Yog tias ntxuav tsis zoo heev, yuav muaj qee qhov tsw ntxhiab seem.
3. Cov txheej txheem yaj ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?
Txoj kev yaj dej kub: Vim tias HPMC tsis yaj 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, faib HPMC raws li txoj kev 1), thiab 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 khoom hmoov, 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 cov tshuaj khib siv txoj kev no. [Hydroxypropyl methylcellulose (HPMC) yog siv los ua cov khoom ua kom tuab thiab khaws dej hauv cov tshuaj khib hmoov putty.]
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, thiab 120 mesh tsawg dua. Feem ntau HPMC tsim tawm hauv Hebei yog 80 mesh. Qhov zoo dua qhov zoo, feem ntau hais lus, qhov zoo dua.
(3) Lub teeb transmittance: muabHydroxypropyl methylcellulose (HPMC)rau hauv dej kom tsim tau ib lub pob tshab colloid, thiab saib nws lub teeb transmittance. Lub teeb transmittance ntau dua, qhov zoo dua, qhia tias muaj tsawg dua insolubles hauv nws. . Lub permeability ntawm ntsug reactors feem ntau zoo, thiab ntawm kab rov tav reactors yog qhov phem dua, tab sis nws tsis txhais hais tias qhov zoo ntawm ntsug reactors zoo dua li ntawm kab rov tav reactors, thiab cov khoom zoo 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. Qhov txawv ntawm hom dej txias uas yaj tau sai thiab hom hydroxypropyl methylcellulose uas yaj tau kub hauv cov txheej txheem tsim khoom yog dab tsi?
Hom HPMC uas tawg sai sai no yog kho nrog glyoxal, thiab nws tawg sai sai hauv dej txias, tab sis nws tsis yaj tiag tiag. Nws tsuas yog yaj thaum qhov viscosity nce ntxiv. Hom instant tsis muaj kev kho nrog glyoxal. Yog tias qhov ntau ntawm glyoxal loj, qhov tawg yuav ceev, tab sis qhov viscosity yuav nce qeeb, thiab yog tias qhov ntau me me, qhov sib txawv yuav yog qhov tseeb.
6. Qhov viscosity tsim nyog ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?
Feem ntau cov hmoov putty yog 100,000 yuan, thiab qhov yuav tsum tau rau cov mortar yog siab dua, thiab 150,000 yuan yog qhov xav tau rau kev siv yooj yim. Ntxiv mus, qhov tseem ceeb tshaj plaws ntawm HPMC yog kev khaws cia dej, ua raws li kev tuab. Hauv cov hmoov putty, tsuav yog qhov khaws cia 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 cia dej. Thaum qhov viscosity tshaj 100,000, qhov viscosity yuav cuam tshuam rau qhov khaws cia 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 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 hydroxypropyl methylcellulose (HPMC) yog dab tsi?
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 yog dab tsi?HPMCnyob rau hauv cov hmoov putty, thiab nws puas tshwm sim chemically?
Hauv cov hmoov putty, HPMC ua peb lub luag haujlwm ntawm thickening, dej khaws cia thiab kev tsim kho.
Ua kom tuab: Cellulose tuaj yeem ua kom tuab kom ncua thiab ua kom cov tshuaj sib npaug zoo li qub, thiab tiv taus kev sagging.
Kev khaws dej: ua kom cov hmoov putty qhuav qeeb qeeb, thiab pab cov tshauv calcium kom teb raws li qhov dej ua.
Kev Tsim Kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj kev tsim kho zoo.
Ntxiv dej rau hauv cov hmoov putty thiab muab tso rau ntawm phab ntsa yog ib qho 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, CaO thiab me me ntawm CaCO3, CaO + H2O = Ca (OH) 2—Ca (OH) 2 + CO2 = CaCO3↓ + H2O Cov tshauv calcium 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 ua haujlwm zoo dua ntawm cov tshauv calcium, thiab tsis koom nrog hauv kev ua haujlwm 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 tshuaj uas tsis ionize hauv dej. Ionization yog hais txog cov txheej txheem uas cov 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 uas 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, thaum HPMC raug muab tso rau hauv dej, nws yuav tsis dissociate mus rau hauv cov ions them, tab sis muaj nyob rau hauv daim ntawv ntawm cov molecules.
11. Qhov kub ntawm hydroxypropyl methylcellulose hauv gel muaj feem xyuam li cas?
Qhov kub ntawm HPMC gel muaj feem cuam tshuam nrog nws cov ntsiab lus methoxy, qhov qis dua cov ntsiab lus methoxy, qhov siab dua qhov kub ntawm gel.
12. Puas muaj kev sib raug zoo ntawm qhov poob ntawm cov hmoov putty thiab HPMC?
Qhov poob ntawm cov hmoov putty feem ntau yog cuam tshuam nrog qhov zoo ntawm cov tshauv calcium, thiab tsis muaj feem cuam tshuam nrog HPMC. Cov calcium tsawg hauv grey calcium thiab qhov sib piv tsis raug ntawm CaO thiab Ca (OH) 2 hauv grey calcium yuav ua rau poob hmoov. Yog tias nws muaj feem cuam tshuam nrog HPMC, ces yog tias HPMC tsis khaws dej zoo, nws kuj tseem yuav ua rau poob hmoov.
13. Qhov txawv ntawm hom dej txias uas yaj tau sai thiab hom hydroxypropyl methylcellulose uas yaj tau kub hauv cov txheej txheem tsim khoom yog dab tsi?
Hom kev faib tawm sai ntawmHPMCyog kho nrog glyoxal rau saum npoo, thiab nws tawg sai sai hauv dej txias, tab sis nws tsis yaj tiag tiag. Nws tsuas yog yaj thaum qhov viscosity nce ntxiv. Hom tam sim ntawd tsis muaj kev kho saum npoo nrog glyoxal. Yog tias qhov ntau ntawm glyoxal loj, qhov tawg yuav sai, tab sis qhov viscosity yuav nce qeeb, thiab yog tias qhov ntau me me, qhov sib txawv yuav yog qhov tseeb.
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024