Hydroxypropyl methyl cellulose yog dab tsi?

Taw qhia rau Hydroxypropyl Methyl Cellulose
Hydroxypropyl methylcellulose, tseem hu ua hypromellose thiab HPMC cellulose hydroxypropyl methyl ether, yog ua los ntawm cov paj rwb ntshiab heev cellulose li raw khoom, uas yog tshwj xeeb etherified nyob rau hauv alkaline tej yam kev mob. HPMC yog cov hmoov dawb, tsis qab, tsis muaj ntxhiab, tsis muaj tshuaj lom, tsis hloov pauv hauv tib neeg lub cev thiab tawm hauv lub cev. Cov khoom yog soluble hauv dej, tab sis insoluble hauv dej kub. Cov tshuaj aqueous yog cov xim tsis muaj pob tshab viscous. HPMC muaj cov thickening zoo heev, emulsifying, film-forming, dispersing, tiv thaiv colloid, noo noo retention, adhesion, acid thiab alkali tsis kam, enzyme kuj thiab lwm yam khoom, thiab yog dav siv nyob rau hauv kev tsim kho, txheej, tshuaj, zaub mov, textiles, roj teb, tshuaj pleev ib ce, ntxuav Agents, ceramics, inks thiab tshuaj polymerization txheej txheem.

1. Cov ntsiab lus calcium uas tsis tshua muaj ntawm grey calcium thiab qhov tsis tsim nyog ntawm CaO thiab Ca(OH)2 hauv cov calcium grey yuav ua rau cov hmoov poob. Yog tias nws muaj qee yam ua rau HPMC, ces yog tias cov dej khaws cia ntawm HPMC tsis zoo, nws tseem yuav ua rau hmoov poob. Puas yog cov hmoov poob ntawm putty hmoov muaj feem xyuam rau hydroxypropyl methylcellulose? Cov hmoov poob ntawm putty hmoov yog feem ntau muaj feem xyuam rau qhov zoo ntawm cov hmoov tshauv calcium, thiab muaj me ntsis ua rau HPMC.

2. Lub luag haujlwm tseem ceeb tshaj plaws ntawm hydroxypropyl methylcellulose 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.

Dab tsi yog qhov viscosity ntawm hydroxypropyl methylcellulose (HPMC)?

Putty hmoov feem ntau yog 100,000 yuan, thiab qhov yuav tsum tau rau mortar yog siab dua, thiab 150,000 yuan yuav tsum tau siv yooj yim.

3. Cov ntaub ntawv tseem ceeb ntawm hydroxypropyl methylcellulose yog dab tsi? 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.

4. Dab tsi yog vim li cas rau qhov tsw ntawm hydroxypropyl methylcellulose? Cov hydroxypropyl methylcellulose ua los ntawm cov kuab tshuaj siv toluene thiab isopropanol ua cov kuab tshuaj. Yog tias kev ntxhua khaub ncaws tsis zoo, yuav muaj qee qhov tsw ntxhiab tsw.

5. Hydroxypropyl methylcellulose: Ib qho uas muaj cov ntsiab lus siab hydroxypropyl feem ntau zoo dua hauv dej tuav. 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. Dab tsi yog lub ntsiab lus qhia? Hydroxypropyl cov ntsiab lus thiab viscosity, cov neeg siv feem ntau txhawj xeeb txog ob qhov ntsuas no.

Puas yog qhov tshwm sim ntawm efflorescence nyob rau hauv mortar muaj feem xyuam rau hydroxypropyl methylcellulose?

Qee lub sij hawm dhau los, ib tus neeg siv khoom hais tias cov khoom muaj efflorescence, thiab nws tau txau. Shotcrete: Lub luag haujlwm tseem ceeb yog npog lub nraub qaum, roughen, thiab ua kom cov adhesion ntawm phab ntsa thiab cov khoom nto. Siv tsawg heev, tsuas yog txau ib txheej nyias ntawm phab ntsa. Ntawm no yog ib daim duab ntawm efflorescence tshwm sim uas tus neeg siv khoom xa tuaj rau kuv: Daim duab Kuv thawj cov tshuaj tiv thaiv yog tias nws tsis yog qhov ua rau hydroxypropyl methylcellulose, vim hydroxypropyl methylcellulose tsis sib haum nrog txhua yam hauv cov hmoov phom reacted. Thiab qhov tshwm sim ntawm efflorescence yog: cov pob zeb zoo tib yam yog silicate, thaum nws ntsib huab cua lossis ya raws hauv phab ntsa, silicate ion dhau los ua cov tshuaj tiv thaiv hydrolysis, thiab cov hydroxide generated ua ke nrog cov hlau ions los ua ib qho hydroxide uas tsis muaj solubility (tshuaj lom neeg Alkaline). , thaum kub nce, cov dej vapor evaporates, thiab hydroxide yog precipitated los ntawm phab ntsa. Nrog rau qhov maj mam evaporation ntawm cov dej, cov hydroxide yog precipitated nyob rau saum npoo ntawm cov pob zeb cement, uas accumulates nyob rau hauv lub sij hawm, ua tus thawj hniav thaum cov xim los yog xim yog lifted thiab tsis adheres rau ntawm phab ntsa, whitening, tev, thiab peeling yuav tshwm sim. Cov txheej txheem no hu ua "pan-alkali". Yog li nws tsis yog ubiquinol tshwm sim los ntawm hydroxypropyl methylcellulose

Cov neeg siv khoom kuj tau hais txog qhov tshwm sim: cov tshuaj tsuag uas nws tau ua yuav muaj qhov tshwm sim ntawm cov yias-alkaline ntawm cov pob zeb ua vaj tse, tab sis yuav tsis tshwm sim rau ntawm phab ntsa cib, uas qhia tau hais tias cov silicon nyob rau hauv cov cement siv rau ntawm phab ntsa pob zeb ntsev (kua alkaline. ntsev) siab dhau lawm. Efflorescence tshwm sim los ntawm evaporation ntawm dej siv nyob rau hauv cov tshuaj tsuag grouting. Txawm li cas los xij, tsis muaj silicate rau ntawm phab ntsa cib raug rho tawm thiab tsis muaj efflorescence yuav tshwm sim. Yog li qhov tshwm sim ntawm efflorescence tsis muaj dab tsi cuam tshuam nrog kev txau.

Kev daws:

1. Cov ntsiab lus silicate ntawm lub hauv paus pob zeb cement yog txo.

2. Siv cov tshuaj tiv thaiv-alkali rov qab txheej txheej, cov tshuaj nkag mus rau hauv lub pob zeb los thaiv cov hlab ntsha, kom dej, Ca(OH) 2, ntsev thiab lwm yam khoom tsis tuaj yeem nkag mus, thiab txiav tawm txoj hauv kev ntawm yias-alkaline tshwm sim.

3. Tiv thaiv dej nkag, thiab tsis txhob nchuav dej ntau ua ntej kev tsim kho.

Kev kho ntawm pan-alkaline phenomenon:
Cov pob zeb efflorescence tu tus neeg sawv cev ntawm lub khw tuaj yeem siv. Tus neeg saib xyuas no yog cov kua tsis muaj xim tsis muaj xim ua los ntawm cov tsis-ionic surfactants thiab cov kuab tshuaj. Nws muaj qee yam cuam tshuam rau kev ntxuav ntawm qee qhov ntuj pob zeb. Tab sis ua ntej siv, nco ntsoov ua ib qho piv txwv me me los ntsuas cov nyhuv thiab txiav txim siab seb puas yuav siv nws.

Kev siv Cellulose hauv Kev Tsim Kho Kev Lag Luam

1. Cement mortar: Txhim kho qhov tawg ntawm cov cement-xuab zeb, zoo heev txhim kho cov yas thiab dej tuav ntawm mortar, muaj kev tiv thaiv kev tawg, thiab txhim kho lub zog ntawm cov cement.
2. Cov nplais pobzeb: txhim kho cov yas thiab dej tuav ntawm cov nplais pobzeb, txhim kho qhov adhesion ntawm cov vuas, thiab tiv thaiv chalking.
3. Txheej ntawm cov ntaub ntawv refractory xws li asbestos: raws li tus neeg sawv cev ncua, fluidity txhim kho tus neeg sawv cev, thiab tseem txhim kho lub zog sib txuas rau lub substrate.
4. Gypsum coagulation slurry: txhim kho cov dej tuav thiab kev ua haujlwm, thiab txhim kho adhesion rau substrate.
5. Joint cement: ntxiv rau cov cement sib koom ua ke rau gypsum board los txhim kho fluidity thiab dej tuav.
6. Latex putty: txhim kho lub fluidity thiab dej tuav ntawm resin latex-based putty.
7. Stucco: Raws li muab tshuaj txhuam los hloov cov khoom ntuj, nws tuaj yeem txhim kho cov dej tuav thiab txhim kho kev sib raug zoo nrog lub substrate.
8. Coatings: Raws li ib tug plasticizer rau latex coatings, nws muaj peev xwm txhim kho lub operability thiab fluidity ntawm coatings thiab putty hmoov.
9. Txau cov xim: Nws muaj cov txiaj ntsig zoo ntawm kev tiv thaiv kev sib tsoo ntawm cov cement lossis latex txau cov ntaub ntawv thiab cov muab tub lim thiab txhim kho fluidity thiab txau qauv.
10. Cov khoom thib ob ntawm cov cement thiab gypsum: siv los ua extrusion molding binder rau cement-asbestos thiab lwm yam khoom siv hydraulic los txhim kho fluidity thiab tau txais cov khoom zoo li molded.
11. Fiber phab ntsa: Vim muaj cov tshuaj tiv thaiv enzyme thiab cov tshuaj tiv thaiv kab mob, nws muaj txiaj ntsig zoo li cov ntaub ntawv rau cov xuab zeb phab ntsa.
12. Lwm tus: Nws tuaj yeem siv los ua tus neeg saib xyuas huab cua npuas (PC version) rau nyias cov av nplaum xuab zeb mortar thiab av nkos hydraulic neeg teb xov tooj.

Kev siv hauv kev lag luam chemical
1. Polymerization ntawm vinyl chloride thiab vinylidene: Raws li kev ncua sij hawm stabilizer thiab dispersant thaum lub sij hawm polymerization, nws tuaj yeem siv ua ke nrog vinyl cawv (PVA) hydroxypropyl cellulose (HPC) los tswj cov duab particle thiab particle tis.
2. Adhesive: Raws li cov nplaum rau phab ntsa, nws tuaj yeem siv ua ke nrog vinyl acetate latex xim tsis yog hmoov txhuv nplej siab.
3. Cov tshuaj tua kab: Ntxiv rau cov tshuaj tua kab thiab tshuaj tua kab, nws tuaj yeem txhim kho cov nyhuv adhesion thaum txau.
4. Latex: Emulsion stabilizer rau asphalt latex, thickener rau styrene-butadiene roj hmab (SBR) latex.
5. Binder: ua ib daim ntawv khi rau xaum thiab crayons.

Kev siv hauv kev lag luam tshuaj pleev ib ce
1. Cov tshuaj zawv plaub hau: Txhim kho cov viscosity ntawm cov tshuaj zawv plaub hau, tshuaj ntxuav tes, thiab tshuaj ntxuav thiab kev ruaj ntseg ntawm cov npuas.
2. Cov tshuaj txhuam hniav: Txhim kho qhov fluidity ntawm cov tshuaj txhuam hniav.

Kev siv hauv kev lag luam kws tshuaj
1. Encapsulation: Tus neeg sawv cev encapsulation tau ua rau hauv cov kuab tshuaj organic lossis cov tshuaj aqueous rau kev tswj hwm tshuaj, tshwj xeeb tshaj yog rau cov tshuaj tsuag encapsulation ntawm cov granules npaj.
2. Tus neeg saib xyuas qeeb: 2-3 grams tauj ib hnub, 1-2G txhua zaus, cov nyhuv yuav tshwm sim hauv 4-5 hnub.
3. Qhov muag tee: Txij li cov osmotic siab ntawm methylcellulose aqueous tov yog tib yam li cov kua muag, nws tsis tshua khaus qhov muag, yog li nws tau ntxiv rau cov tee dej ua cov roj nplaum rau kev sib cuag lub qhov muag qhov muag.
4. Jelly: raws li cov khoom siv ntawm jelly-zoo li cov tshuaj sab nraud lossis tshuaj pleev.
5. Dipping tshuaj: raws li ib tug thickener, dej retention agent