1. Kev siv cellulose tseem ceeb yog dab tsi?
HPMCyog 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, textiles, kev ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. HPMC tuaj yeem muab faib ua qib kev lag luam, qib zaub mov thiab qib tshuaj raws li daim ntawv thov.
2. Muaj ntau hom cellulose, thiab qhov sib txawv ntawm lawv siv yog dab tsi?
HPMC muaj peev xwm muab faib ua hom tam sim ntawd (lub npe lag luam tom qab "S") 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 tias HPMC tsuas yog tawg hauv dej yam tsis muaj kev yaj tiag tiag. Kwv yees li (do) rau 2 feeb, qhov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab dawb viscous colloid. 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 (raws li qhov kub gel ntawm cov khoom), qhov viscosity yuav maj mam tshwm sim kom txog thaum nws tsim cov pob tshab viscous colloid.
3. Cov txheej txheem ntawm kev yaj cellulose yog dab tsi?
1). Tag nrho cov qauv tuaj yeem ntxiv rau cov khoom siv los ntawm kev sib tov qhuav;
2). Thaum nws xav tau ntxiv ncaj qha rau hauv cov kua dej kub ib txwm, nws zoo dua los siv hom dej txias dispersion. Feem ntau nws siv sijhawm 1-30 feeb kom tuab tom qab ntxiv (do thiab do)
3). Cov qauv qub yog thawj zaug do thiab dispersed nrog dej kub, ces yaj hauv dej txias tom qab do thiab txias;
4). Yog tias agglomeration tshwm sim thaum lub sijhawm yaj, nws yog vim qhov kev sib xyaw tsis txaus lossis tus qauv ib txwm raug ntxiv ncaj qha rau hauv dej txias. Lub sijhawm no, nws yuav tsum tau sib xyaw sai sai. lub
5). Yog tias cov npuas dej tshwm sim thaum lub sijhawm yaj, lawv tuaj yeem tso rau 2-12 teev (lub sijhawm tshwj xeeb yog txiav txim siab los ntawm qhov sib xws ntawm cov tshuaj) lossis tshem tawm los ntawm kev nqus tsev, nias, thiab lwm yam, thiab tus nqi tsim nyog ntawm cov neeg sawv cev defoaming kuj tseem tuaj yeem ntxiv.
4. Yuav ua li cas txiav txim siab qhov zoo ntawm cellulose yooj yim thiab intuitively?
1) Qhov dawb, txawm hais tias qhov dawb tsis tuaj yeem txiav txim siab seb HPMC puas yooj yim siv, thiab yog tias cov neeg sawv cev dawb ntxiv rau hauv cov txheej txheem ntau lawm, nws yuav cuam tshuam rau nws qhov zoo, tab sis feem ntau ntawm cov khoom zoo muaj qhov dawb zoo.
2) Kev Zoo: Qhov zoo ntawmHPMCfeem ntau muaj 80 mesh thiab 100 mesh, 120 mesh tsawg dua, qhov finer qhov finer zoo dua.
3) Kev xa hluav taws xob: Tom qab HPMC muab tso rau hauv dej los ua cov pob tshab colloid, saib nws qhov kev xa hluav taws xob. Qhov kev xa hluav taws xob ntau dua, qhov zoo dua, qhia tias muaj cov insolubles tsawg dua hauv nws, thiab qhov kev xa hluav taws xob ntawm cov reactors ntsug feem ntau zoo. , Lub reactor kab rov tav yog qhov phem dua, tab sis nws tsis txhais tau tias qhov zoo ntawm lub reactor ntsug zoo dua li ntawm lub reactor kab rov tav, thiab muaj ntau yam los txiav txim siab qhov zoo ntawm cov khoom.
4) Qhov hnyav tshwj xeeb: Qhov hnyav tshwj xeeb loj dua, qhov hnyav dua qhov zoo dua. Qhov hnyav tshwj xeeb siab dua, qhov ntau dua ntawm cov hydroxypropyl hauv cov khoom. Qhov ntau dua ntawm cov hydroxypropyl, qhov zoo dua ntawm kev khaws dej.
5. Muaj pes tsawg cellulose nyob rau hauv cov hmoov putty?
Tus nqi ntawm HPMC siv rau hauv kev siv tiag tiag yog cuam tshuam los ntawm huab cua, kub, zoo ntawm cov tshauv calcium hauv zos, cov mis ntawm cov hmoov putty thiab qhov zoo uas cov neeg siv khoom xav tau. Muaj qhov sib txawv ntawm ntau qhov chaw, feem ntau hais lus, nws yog ntawm 4-5 kg.
6. Qhov viscosity ntawm cellulose yog dab tsi?
Feem ntau, 100,000 putty hmoov txaus, thiab qhov yuav tsum tau ua hauv mortar siab dua, thiab nws xav tau 150,000 kom yooj yim siv. Ntxiv mus, qhov tseem ceeb tshaj plaws ntawm HPMC yog kev khaws dej, ua raws li kev tuab. Hauv putty hmoov, tsuav yog qhov khaws dej zoo thiab viscosity qis (7-8), nws kuj ua tau. Tau kawg, qhov siab dua qhov viscosity, qhov zoo dua qhov khaws dej. Thaum viscosity tshaj 100,000, qhov viscosity tsis muaj kev cuam tshuam rau kev khaws dej. loj.
7. Cov cim qhia tseem ceeb ntawm cellulose yog dab tsi?
Cov ntsiab lus ntawm Hydroxypropyl
Cov ntsiab lus ntawm methyl
viscosity
Tshauv
Poob thaum ziab
8. Cov khoom siv tseem ceeb ntawm cellulose yog dab tsi?
Cov ntaub ntawv tseem ceeb ntawm HPMC: paj rwb zoo, methyl chloride, propylene oxide, kua caustic soda, thiab lwm yam.
9. Lub luag haujlwm tseem ceeb ntawm kev siv cellulose hauv cov hmoov putty yog dab tsi? Puas muaj kev tshuaj lom neeg?
Ntawm cov hmoov putty, nws ua peb lub luag haujlwm ntawm kev ua kom tuab, khaws dej thiab tsim kho. Thickening, cellulose tuaj yeem ua kom tuab kom ncua, khaws cov tshuaj sib xws nce thiab nqis, thiab tiv taus sagging. Kev khaws dej: ua rau cov hmoov putty qhuav qeeb, thiab pab cov tshauv calcium kom ua haujlwm 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 hauv kev tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm pabcuam.
10. Cellulose yog ib qho cellulose ether uas tsis yog ionic, yog li ntawd, non-ionic yog dab tsi?
Hauv cov lus yooj yim, cov tshuaj inert tsis koom nrog cov tshuaj lom neeg.
CMC (carboxymethyl cellulose) yog ib qho cationic cellulose, yog li nws yuav tig mus ua taum pauv thaum nws ntsib cov tshauv calcium.
11 Qhov kub ntawm cellulose hauv gel muaj feem cuam tshuam 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 cov hmoov poob ntawm cov hmoov putty thiab cellulose?
Muaj kev sib raug zoo! ! ! Ntawd yog, qhov tsis zoo ntawm HPMC khaws cia dej yuav ua rau poob hmoov (cov ntsiab lus ntawm cov ntaub ntawv xws li tshauv, calcium hnyav, thiab cement, qhov kub ntawm kev tsim kho, thiab phab ntsa yuav raug cuam tshuam).
13. Qhov txawv ntawm cov dej txias uas yaj tau sai thiab cov cellulose kub uas yaj tau sai hauv cov txheej txheem ntau lawm yog dab tsi?
Cov HPMC uas siv dej txias tam sim ntawd yog kho nrog glyoxal, thiab nws tawg sai sai hauv dej txias, tab sis nws tsis yaj tiag tiag. Nws tsuas yaj thaum qhov viscosity nce ntxiv. Cov hom kub yaj tsis kho nrog glyoxal. Yog tias glyoxal muaj ntau, qhov tawg yuav sai, tab sis qhov viscosity yuav nce qeeb, thiab yog tias me me, qhov sib txawv yuav yog qhov tseeb.
14. Vim li cas cellulose thiaj muaj ntxhiab tsw?
HPMC 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. (Kev rov qab ua kom tsis muaj ntxhiab yog qhov tseem ceeb ntawm cov ntxhiab tsw)
15. Yuav ua li cas xaiv cov cellulose uas tsim nyog rau ntau lub hom phiaj sib txawv?
Hmoov Putty: xav tau kev khaws cia dej siab, yooj yim tsim kho
Cov cement mortar ib txwm muaj: xav tau dej khaws cia siab, tiv taus kub siab, thiab viscosity tam sim ntawd
Kev siv cov kua nplaum rau kev tsim kho: cov khoom lag luam tam sim ntawd nrog viscosity siab. (qib pom zoo
Gypsum mortar: khaws dej siab, nruab nrab thiab qis viscosity, instant viscosity nce
16. Lwm lub npe rau cellulose yog dab tsi?
Hu ua HPMC lossis MHPC alias hypromellose, cellulose hydroxypropyl methyl ether.
17. Daim ntawv thov ntawm cellulose hauv cov hmoov putty, dab tsi yog qhov laj thawj rau cov npuas hauv cov hmoov putty?
Hauv cov hmoov putty, HPMC ua peb lub luag haujlwm ntawm kev ua kom tuab, khaws dej thiab tsim kho. Cov laj thawj rau cov npuas yog:
1. Ntxiv dej ntau dhau.
2. Txheej hauv qab tsis qhuav, tsuas yog khawb lwm txheej rau saum, thiab nws yooj yim ua npuas ncauj.
18. Qhov txawv ntawm cellulose thiab MC yog dab tsi:
MC yog methyl cellulose, uas yog ua los ntawm cellulose ether los ntawm kev kho cov paj rwb zoo nrog alkali, siv methane chloride ua tus neeg sawv cev etherification, thiab dhau los ntawm ntau yam kev tshuaj tiv thaiv. Feem ntau, qib ntawm kev hloov pauv yog 1.6-2.0, thiab solubility sib txawv nrog ntau qib ntawm kev hloov pauv. Txawv, nws yog rau cov cellulose ether uas tsis yog ionic.
(1) Qhov khaws dej ntawm methylcellulose nyob ntawm nws qhov ntxiv, viscosity, qhov zoo ntawm cov khoom me me thiab qhov nrawm ntawm kev yaj. Feem ntau, yog tias qhov ntxiv loj, qhov zoo me me, thiab qhov viscosity loj, qhov nrawm ntawm kev khaws dej siab. Ntawm lawv, qhov ntxiv muaj qhov cuam tshuam ntau dua rau tib neeg qhov ceev ntawm kev khaws dej. Qhov viscosity tsis sib npaug rau qhov nrawm ntawm kev khaws dej. Qhov nrawm ntawm kev yaj feem ntau nyob ntawm qhov chaw ntawm cov khoom me me cellulose. Qib ntawm kev hloov pauv thiab qhov zoo ntawm cov khoom me me. Ntawm ntau cov cellulose ethers saum toj no, qhov nrawm ntawm kev khaws dej ntawm methyl cellulose thiab Jinshuiqiao cellulose siab dua.
(2) Methylcellulose yaj tau hauv dej txias, thiab nws yuav nyuaj rau yaj hauv dej kub. Nws cov kua dej ruaj khov heev hauv qhov ntau ntawm ph = 3-12. Nws muaj kev sib raug zoo nrog cov hmoov txhuv nplej siab, thiab lwm yam thiab ntau yam surfactants. Thaum qhov kub thiab txias thaum lub sijhawm gelation kub, gelation yuav tshwm sim.
(3) Kev hloov pauv ntawm qhov kub thiab txias yuav cuam tshuam loj heev rau qhov ceev ntawm cov methyl cellulose. Feem ntau, qhov kub siab dua, qhov ceev ntawm cov dej khaws cia yuav phem dua. Yog tias qhov kub ntawm cov mortar tshaj 40 degrees, qhov ceev ntawm cov methyl cellulose yuav raug txo qis, uas yuav cuam tshuam loj heev rau kev tsim cov mortar.
(4)Methyl cellulosemuaj qhov cuam tshuam loj heev rau kev tsim kho thiab kev nplaum ntawm cov mortar. Kev nplaum ntawm no yog hais txog lub zog nplaum uas tus neeg ua haujlwm lub cuab yeej thov thiab lub substrate phab ntsa, uas yog, qhov kev tiv thaiv shear ntawm cov mortar. Qhov kev nplaum yog siab, qhov kev tiv thaiv shear ntawm cov mortar yog loj, thiab lub zog uas cov neeg ua haujlwm xav tau thaum lub sijhawm siv kuj loj, thiab kev ua haujlwm ntawm cov mortar tsis zoo.
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024