1. Dab tsi yog daim ntawv thov tseem ceeb ntawmHydroxypropyl methylcellulose (HPMC)?
Hydroxypropyl methylcellulose yog dav siv nyob rau hauv cov ntaub ntawv siv, coatings, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textiles, ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. Hydroxypropyl methylcellulose tuaj yeem muab faib ua qib kev tsim kho, qib zaub mov thiab qib tshuaj raws li nws daim ntawv thov. Tam sim no, feem ntau ntawm cov khoom siv hauv tsev yog qib kev tsim kho. Nyob rau hauv kev tsim kho qib, putty hmoov yog siv ntau npaum li cas, li 90% yog siv rau putty hmoov, thiab tus so yog siv rau cement mortar thiab kua nplaum.
2. Muaj ntau ntau hom hydroxypropyl methylcellulose (HPMC), thiab qhov sib txawv ntawm lawv siv yog dab tsi?
HPMC tuaj yeem muab faib ua hom instant thiab kub dissolution hom. Cov khoom lag luam tam sim no tawg sai sai thaum lawv ntsib cov dej txias thiab ploj mus rau hauv dej. Lub sijhawm no, cov kua dej tsis muaj viscosity vim tias HPMC tsuas yog tawg mus rau hauv dej yam tsis muaj kev sib cais tiag tiag. Tom qab li 2 feeb, lub viscosity ntawm cov kua maj mam nce, tsim ib pob tshab viscous colloid. Cov khoom kub yaj, thaum ntsib nrog dej txias, tuaj yeem tawg sai sai hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity yuav maj mam tshwm kom txog thaum nws tsim cov pob tshab viscous colloid. Hom kub-melt tsuas yog siv rau hauv cov hmoov putty thiab mortar. Hauv cov kua nplaum thiab pleev xim, yuav muaj kev sib koom ua ke thiab siv tsis tau. Hom instant muaj ntau yam kev siv. Nws tuaj yeem siv rau hauv cov hmoov putty thiab mortar, nrog rau cov kua nplaum thiab xim, tsis muaj contraindications.
3. Yuav ua li cas yog cov txheej txheem dissolution ntawm hydroxypropyl methylcellulose (HPMC)?
Txoj kev sib cais dej kub: Vim HPMC tsis yaj hauv dej kub, HPMC tuaj yeem sib cais hauv cov dej kub thaum pib, thiab tom qab ntawd yaj sai sai thaum txias. Ob txoj kev raug piav raws li hauv qab no:
1) Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom sov li 70 ° C. Cov hydroxypropyl methylcellulose tau maj mam ntxiv nyob rau hauv qeeb stirring, pib lub HPMC ntab rau saum npoo dej, thiab ces maj mam tsim ib slurry, uas yog txias nyob rau hauv stirring.
2) Ntxiv 1/3 lossis 2/3 ntawm qhov xav tau ntawm cov dej hauv lub thawv, thiab ua kom sov rau 70 ° C, raws li txoj kev 1), disperse HPMC los npaj cov dej kub slurry; Tom qab ntawd ntxiv cov dej txias ntxiv rau cov dej kub slurry, qhov sib tov yog txias tom qab stirring.
Txoj kev sib xyaw hmoov: sib tov HPMC hmoov nrog ntau ntawm lwm cov hmoov hmoov, sib tov kom huv si nrog lub tov khoom, thiab tom qab ntawd ntxiv dej kom yaj, ces HPMC tuaj yeem yaj nyob rau lub sijhawm no yam tsis muaj agglomeration, vim tias tsuas muaj HPMC me ntsis hauv txhua lub kaum me me hmoov, yuav yaj tam sim ntawd thaum sib cuag nrog dej. ——Putty hmoov thiab mortar manufacturers siv txoj kev no. [Hydroxypropyl methylcellulose (HPMC) yog siv los ua cov thickener thiab dej tuav tus neeg sawv cev hauv cov hmoov mortar.]
4. Yuav ua li cas txiav txim qhov zoo ntawm hydroxypropyl methylcellulose (HPMC) yooj yim thiab intuitively?
(1) Whiteness: Txawm hais tias dawb tsis tuaj yeem txiav txim siab seb HPMC puas siv tau yooj yim, thiab yog tias cov tshuaj ntxuav hniav 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 cov xim zoo nkauj.
(2) Fineness: Qhov zoo ntawm HPMC feem ntau muaj 80 mesh thiab 100 mesh, 120 mesh tsawg dua, thiab HPMC feem ntau ua hauv Hebei yog 80 mesh. Qhov zoo tshaj qhov fineness, feem ntau hais, qhov zoo dua.
(3) Transmittance: Muab hydroxypropyl methylcellulose (HPMC) rau hauv dej los tsim cov pob tshab colloid, thiab xyuas nws cov kis. Qhov siab dua qhov transmittance, qhov zoo dua, qhia tias muaj tsawg insoluble hauv nws. Lub permeability ntawm ntsug reactors feem ntau zoo, thiab cov kab rov tav reactors yog phem, tab sis nws tsis txhais hais tias qhov zoo ntawm ntsug reactors zoo dua li cov kab rov tav reactors, thiab cov khoom zoo yog txiav txim los ntawm ntau yam.
(4) Lub ntiajteb txawj nqus tshwj xeeb: qhov loj dua qhov tshwj xeeb lub ntiajteb txawj nqus, qhov hnyav dua qhov zoo dua. Qhov tshwj xeeb yog loj, feem ntau vim hais tias cov ntsiab lus ntawm hydroxypropyl pawg hauv nws yog siab, thiab cov ntsiab lus ntawm hydroxypropyl pawg yog siab, cov dej tuav tau zoo dua.
5. Tus nqi ntawm hydroxypropyl methylcellulose (HPMC) hauv cov hmoov putty yog dab tsi?
Tus nqi ntawm HPMC siv nyob rau hauv cov ntaub ntawv siv tau sib txawv nyob ntawm seb qhov kev nyab xeeb, qhov kub thiab txias, qhov zoo ntawm cov hmoov tshauv hauv zos, cov mis ntawm putty hmoov thiab "zoo xav tau los ntawm cov neeg siv khoom". Feem ntau hais lus, nruab nrab ntawm 4 kg thiab 5 kg. Piv txwv li: feem ntau ntawm cov hmoov putty nyob rau hauv Beijing yog 5 kg; feem ntau ntawm cov hmoov putty hauv Guizhou yog 5 kg nyob rau lub caij ntuj sov thiab 4.5 kg nyob rau lub caij ntuj no; Tus nqi ntawm cov hmoov putty hauv Yunnan yog me me, feem ntau 3 kg txog 4 kg, thiab lwm yam.
6. Qhov viscosity tsim nyog ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?
Putty hmoov feem ntau txaus rau 100,000 yuan, thiab qhov yuav tsum tau 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.
7. Cov kev qhia tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?
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.
8. Dab tsi yog cov khoom siv tseem ceeb ntawmHydroxypropyl methylcellulose (HPMC)?
Cov ntaub ntawv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC): paj rwb refined, methyl chloride, propylene oxide, thiab lwm yam raw khoom, caustic soda, acid, toluene, isopropanol, thiab lwm yam.
9. Lub luag haujlwm tseem ceeb ntawm kev thov HPMC hauv cov hmoov putty yog dab tsi, thiab nws puas tshwm sim tshuaj?
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, Ca O 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 zoo dua cov tshuaj tiv thaiv nyob rau hauv calcium. tej yam tshuaj tiv thaiv nws tus kheej.
10. HPMC yog non-ionic cellulose ether, yog li dab tsi yog non-ionic?
Nyob rau hauv layman cov ntsiab lus, non-ions yog cov khoom uas tsis ionize 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. Hais tias yog, thaum twgHPMCyog muab tso rau hauv dej, nws yuav tsis dissociate rau hauv them ions, tab sis muaj nyob rau hauv daim ntawv ntawm molecules.
Lub sij hawm xa tuaj: Plaub Hlis-28-2024