1. Dab tsi yog qhov tseem ceeb ntawm kev siv hydroxypropyl methylcellulose?
HPMC yog dav siv hauv cov khoom siv hauv tsev, coatings, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, 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 nws siv.
2. Muaj ntau hom hydroxypropyl methylcellulose. Dab tsi yog qhov txawv ntawm lawv?
HPMC tuaj yeem muab faib ua hom tam sim (hom npe "S") thiab hom kub-soluble. Cov khoom lag luam tam sim no tawg sai sai hauv dej txias thiab ploj hauv dej. Lub sijhawm no, cov kua dej tsis muaj viscosity vim tias HPMC tsuas yog tawg mus rau hauv dej thiab tsis muaj kev daws teeb meem tiag tiag. Tom qab hais txog (thirring) 2 feeb, lub viscosity ntawm cov kua maj mam nce thiab pob tshab viscous colloid yog tsim. Cov khoom kub-soluble, hauv dej txias, tuaj yeem tawg sai sai hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias poob mus rau ib qho kub (raws li gel kub ntawm cov khoom), viscosity maj mam tshwm kom txog thaum lub pob tshab thiab khov colloid yog tsim.
3. Txoj kev daws teeb meem hydroxypropyl methylcellulose yog dab tsi?
1. Txhua tus qauv tuaj yeem muab ntxiv rau cov khoom siv los ntawm kev sib xyaw qhuav;
2. Nws yuav tsum tau ntxiv ncaj qha mus rau qhov kub thiab txias aqueous tov. Nws yog qhov zoo tshaj plaws los siv hom dej txias dispersion. Tom qab ntxiv, nws feem ntau ncav cuag thickening li ntawm 10-90 feeb (kib, do, do)
3. Rau cov qauv zoo tib yam, do thiab disperse nrog dej kub ua ntej, ces ntxiv dej txias kom yaj tom qab nplawm thiab txias.
4. Yog hais tias agglomeration los yog wrapping tshwm sim thaum lub sij hawm dissolution, nws yog vim hais tias lub stirring yog tsis txaus los yog tus qauv zoo tib yam yog ncaj qha ntxiv rau cov dej txias. Hauv qhov no, do sai sai.
5. Yog tias cov npuas raug tsim tawm thaum lub sijhawm tawg, lawv tuaj yeem tso tseg rau 2-12 teev (lub sijhawm tshwj xeeb nyob ntawm qhov sib xws ntawm cov tshuaj) lossis tshem tawm los ntawm lub tshuab nqus tsev rho tawm, nias, thiab lwm yam, thiab tus nqi tsim nyog ntawm defoaming tus neeg sawv cev kuj tuaj yeem raug tshem tawm. muab ntxiv.
4. Yuav ua li cas txiav txim qhov zoo ntawm hydroxypropyl methylcellulose yooj yim thiab intuitively?
1. Dawb. Txawm hais tias kev ua kom dawb tsis tuaj yeem txiav txim siab seb HPMC puas zoo lossis tsis zoo, thiab ntxiv cov tshuaj ntxuav hniav dawb thaum lub sijhawm tsim khoom yuav cuam tshuam rau nws cov khoom zoo, feem ntau cov khoom zoo muaj cov xim dawb.
2. Fineness: HPMC fineness feem ntau yog 80 mesh thiab 100 mesh, qis dua 120, qhov finer qhov zoo dua.
3. Lub teeb xa hluav taws xob: HPMC tsim cov pob tshab colloid hauv dej. Saib ntawm lub teeb transmittance. Qhov loj dua lub teeb transmittance, qhov zoo dua qhov permeability, uas txhais tau hais tias muaj tsawg insoluble tshuaj nyob rau hauv nws. Vertical reactor feem ntau zoo, thiab kab rov tav reactor yuav emit ib co. Tab sis nws tsis tuaj yeem hais tias qhov ua tau zoo ntawm cov kav dej ntsug yog zoo dua li ntawm kab rov tav kettles. Muaj ntau yam uas txiav txim siab cov khoom zoo.
4. Lub ntiajteb txawj nqus tshwj xeeb: qhov siab dua qhov tshwj xeeb, qhov hnyav dua. Qhov ntau dua qhov tshwj xeeb lub ntiajteb txawj nqus, qhov siab dua cov ntsiab lus hydroxypropyl. Feem ntau, qhov siab dua cov ntsiab lus hydroxypropyl, qhov dej tuav tau zoo dua.
5. Ntau npaum li cas hydroxypropyl methylcellulose siv hauv cov hmoov putty?
Tus nqi ntawm HPMC siv rau hauv daim ntawv thov tiag tiag txawv ntawm qhov chaw mus rau qhov chaw, feem ntau hais lus, nws yog nyob ntawm 4-5 kg, nyob ntawm qhov chaw huab cua, qhov kub thiab txias, hauv zos calcium tshauv zoo, putty hmoov mis thiab cov neeg siv khoom zoo.
6. Qhov viscosity ntawm hydroxypropyl methylcellulose yog dab tsi?
Putty hmoov feem ntau raug nqi RMB 100,000, thaum mortar muaj ntau dua. Nws raug nqi RMB 150,000 kom yooj yim siv. Ntxiv mus, lub luag haujlwm tseem ceeb ntawm HPMC yog khaws cov dej, ua raws li cov thickening. Nyob rau hauv cov hmoov nplej, tsuav yog cov dej tuav tau zoo thiab cov viscosity tsawg (7-8), kuj tseem ua tau. Tau kawg, qhov ntau dua qhov viscosity, qhov zoo dua qhov txheeb ze dej tuav. Thaum lub viscosity siab tshaj 100,000, lub viscosity muaj me ntsis cuam tshuam rau cov dej tuav.
7. Cov kev qhia tseem ceeb ntawm hydroxypropyl methylcellulose yog dab tsi?
Cov ntsiab lus ntawm Hydroxypropyl
Methyl cov ntsiab lus
viscosity
Tshauv
qhuav poob phaus
8. Cov ntaub ntawv tseem ceeb ntawm hydroxypropyl methylcellulose yog dab tsi?
Cov ntaub ntawv tseem ceeb ntawm HPMC: refined paj rwb, methyl chloride, propylene oxide, lwm yam raw khoom, caustic soda, thiab acid toluene.
9. Daim ntawv thov thiab lub luag haujlwm tseem ceeb ntawm hydroxypropyl methylcellulose hauv putty hmoov, puas yog tshuaj?
Hauv cov hmoov putty, nws plays peb lub luag haujlwm tseem ceeb: thickening, dej tuav thiab kev tsim kho. Thickening tuaj yeem ua kom cov cellulose thicken thiab ua lub luag haujlwm ncua, 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 calcium grey kom hnov qab hauv dej. Ua haujlwm tau zoo: Cellulose muaj cov nyhuv lubricating, uas ua rau cov hmoov putty muaj kev ua haujlwm zoo. HPMC tsis koom nrog cov tshuaj tiv thaiv thiab tsuas yog ua lub luag haujlwm txhawb nqa.
10. Hydroxypropyl methylcellulose yog ib hom non-ionic cellulose ether, yog li dab tsi yog hom non-ionic?
Feem ntau hais lus, cov tshuaj inert tsis koom nrog cov tshuaj tiv thaiv.
CMC (carboxymethylcellulose) yog cationic cellulose thiab yuav tig mus rau hauv tofu dregs thaum raug calcium tshauv.
11. Lub gel kub ntawm hydroxypropyl methylcellulose cuam tshuam txog dab tsi?
Lub gel kub ntawm HPMC muaj feem xyuam rau nws cov ntsiab lus methoxyl. Qhov qis dua cov ntsiab lus methoxyl, qhov kub ntawm gel yog siab dua.
12. Puas muaj kev sib raug zoo ntawm putty hmoov thiab hydroxypropyl methylcellulose?
Qhov no yog qhov tseem ceeb! HPMC muaj cov dej tuav tsis zoo thiab yuav ua rau hmoov av.
13. Dab tsi yog qhov sib txawv ntawm cov txheej txheem tsim khoom ntawm cov kua dej txias thiab cov dej kub ntawm hydroxypropyl methylcellulose?
HPMC dej txias-soluble hom yog sai sai dispersed nyob rau hauv dej txias tom qab kev kho mob nto nrog glyoxal, tab sis nws yeej tsis yaj. Lub viscosity nce, uas yog, nws dissolves. Cov kub yaj hom tsis nto kho nrog glyoxal. Glyoxal yog qhov loj hauv qhov loj thiab tawg sai sai, tab sis muaj cov viscosity qeeb thiab ntim me me, thiab rov ua dua.
14. Dab tsi yog qhov tsw ntawm hydroxypropyl methylcellulose?
HPMC tsim los ntawm cov txheej txheem hnyav yog tsim nrog toluene thiab isopropyl cawv ua cov kuab tshuaj. Yog tsis ntxuav zoo, yuav muaj ib co tsw tsw qab. (Neutralization thiab recycling yog txheej txheem tseem ceeb rau tsw)
15. Yuav ua li cas xaiv qhov tsim nyog hydroxypropyl methylcellulose rau kev siv sib txawv?
Putty hmoov: siab dej tuav thiab kev tsim kho kom yooj yim (pom zoo hom: 7010N)
Ordinary cement-based mortar: high water retention, high temperature resistance, instantaneous viscosity (qib pom zoo: HPK100M)
Kev tsim kho daim ntawv thov: cov khoom siv tam sim, siab viscosity. (Hom pom zoo: HPK200MS)
Gypsum mortar: high water retention, medium-low viscosity, instantaneous viscosity (pom zoo: HPK600M)
16. Lwm lub npe ntawm hydroxypropyl methylcellulose yog dab tsi?
HPMC lossis MHPC tseem hu ua hydroxypropyl methylcellulose thiab hydroxypropyl methylcellulose ether.
17. Daim ntawv thov ntawm hydroxypropyl methylcellulose hauv putty hmoov. Dab tsi ua rau putty hmoov ua npuas ncauj?
HPMC plays peb lub luag haujlwm tseem ceeb hauv cov hmoov putty: thickening, dej tuav thiab kev tsim kho. Cov laj thawj rau npuas yog:
1. Ntxiv dej ntau dhau.
2. Yog hais tias hauv qab tsis qhuav, scraping lwm txheej saum toj yuav ua rau hlwv tau yooj yim.
18. Qhov txawv ntawm hydroxypropyl methylcellulose thiab MC yog dab tsi:
MC, methyl cellulose, yog tsim los ntawm cov paj rwb refined tom qab kho alkali, siv methane chloride ua tus neeg sawv cev etherifying, thiab cov tshuaj tiv thaiv los tsim cellulose ether. Qhov kev hloov pauv dav dav yog 1.6-2.0, thiab qhov sib txawv ntawm qhov sib txawv ntawm kev hloov pauv kuj txawv. Nws yog non-ionic cellulose ether.
(1) Cov dej tuav ntawm methylcellulose nyob ntawm nws cov nyiaj ntxiv, viscosity, particle fineness thiab dissolution tus nqi. Feem ntau hais lus, qhov sib ntxiv yog loj, qhov fineness yog me me, lub viscosity siab, thiab cov dej tuav tus nqi siab. Cov nyiaj ntxiv muaj qhov cuam tshuam zoo rau cov dej tuav tus nqi, thiab cov viscosity tsis muaj dab tsi cuam tshuam nrog cov dej tuav tus nqi. Tus nqi dissolution feem ntau yog nyob ntawm qhov kev hloov pauv ntawm qhov chaw thiab qhov zoo ntawm cov cellulose hais. Ntawm cov cellulose ethers saum toj no, methylcellulose thiab hydroxypropylmethylcellulose muaj cov dej tuav ntau dua.
(2) Methyl cellulose tuaj yeem yaj hauv dej txias, tab sis yuav ntsib teeb meem hauv cov dej kub. Nws cov tshuaj aqueous yog ruaj khov nyob rau hauv thaj tsam ntawm pH = 3-12, thiab muaj kev sib raug zoo nrog cov hmoov txhuv nplej siab thiab ntau surfactants. Thaum qhov kub nce mus txog gel Thaum lub gelation kub nce, gelation yuav tshwm sim.
(3) Kev hloov kub yuav cuam tshuam rau cov dej tuav tus nqi ntawm methylcellulose. Feem ntau, qhov kub thiab txias ntau dua, cov dej khaws cia yuav tsis zoo. Yog hais tias lub mortar kub siab tshaj 40 degrees, cov dej tuav ntawm methylcellulose yuav ho deteriorate, heev cuam tshuam rau kev tsim kho ntawm mortar.
(4) Methylcellulose muaj feem cuam tshuam rau kev tsim kho thiab adhesion ntawm mortar. Lub adhesion ntawm no yog hais txog qhov adhesion ntawm tus neeg ua haujlwm daim ntawv thov cov cuab yeej thiab cov khoom siv phab ntsa, uas yog, shear resistance ntawm lub mortar. Lub adhesiveness yog siab, shear resistance ntawm lub mortar yog siab, thiab lub zog yuav tsum tau los ntawm cov neeg ua hauj lwm thaum lub sij hawm siv kuj yog siab, yog li kev tsim kho ntawm lub mortar yog tsis zoo.
Post lub sij hawm: Jan-31-2024