HPMC hauv Skim tsho tiv no

Hydroxypropyl methyl cellulose (HPMC) viscosity rau Skim tsho?

- teb: Skim lub tsho tiv no yog ok feem ntau HPMC 100000cps, qee qhov siab ntawm qhov yuav tsum tau muaj hauv mortar, xav tau 150000cps muaj peev xwm siv. Ntxiv mus, HPMC yog lub luag haujlwm tseem ceeb tshaj plaws ntawm kev khaws dej, ua raws li cov thickening. Nyob rau hauv lub tsho tiv no Skim, tsuav yog cov dej tuav tau zoo, qhov viscosity tsawg (7-80000), kuj tseem ua tau, ntawm chav kawm, qhov viscosity loj dua, cov txheeb ze dej tuav tau zoo dua, thaum lub viscosity ntau dua 100. txhiab, qhov viscosity ntawm dej tuav tsis ntau.

Cov kev qhia tseem ceeb ntawm hydroxypropyl methyl cellulose (HPMC) yog dab tsi?

Teb: Hydroxypropyl cov ntsiab lus thiab viscosity, feem ntau cov neeg siv saib xyuas txog ob qhov ntsuas no. Hydroxypropyl cov ntsiab lus yog siab, dej tuav feem ntau zoo dua. Viscosity, dej tuav, txheeb ze (tab sis tsis meej) kuj zoo dua, thiab viscosity, cement mortar yog qhov zoo dua los siv qee yam.

Hydroxypropyl methyl cellulose (HPMC) cov ntaub ntawv tseem ceeb yog dab tsi?

Teb: hydroxypropyl methyl cellulose (HPMC) raw cov ntaub ntawv: refined paj rwb, chloromethane, propylene oxide, lwm yam raw khoom, ntsiav tshuaj alkali, acid, toluene, isopropyl cawv thiab hais txog.

HPMC hauv Skim lub tsho tiv no hauv daim ntawv thov, lub luag haujlwm tseem ceeb, puas yog tshuaj?

Teb: HPMC hauv Skim tsho tiv no, thickening, dej thiab kev tsim kho ntawm peb lub luag hauj lwm. Thickening: cellulose tuaj yeem ua kom tuab rau kev ncua, yog li cov kev daws teeb meem tseem niaj hnub nce thiab nqis lub luag haujlwm ntawm kev tiv thaiv kev khiav. Kev tuav dej: ua kom lub tsho Skim qhuav maj mam, pab cuam grey calcium hauv qhov kev txiav txim ntawm cov tshuaj tiv thaiv dej. Kev tsim kho: cellulose lubrication, tuaj yeem ua rau Skim coat muaj kev tsim kho zoo. HPMC tsis koom nrog cov tshuaj tiv thaiv kab mob, tab sis tsuas yog ua lub luag haujlwm txhawb nqa. Skim lub tsho tiv no thiab dej, ntawm phab ntsa, yog cov tshuaj tiv thaiv, vim yog tsim cov tshuaj tshiab, cov phab ntsa ntawm Skim lub tsho tiv no los ntawm phab ntsa, hauv av ua hmoov, thiab tom qab ntawd siv, tsis zoo, vim tau tsim cov khoom tshiab. (calcium carbonate). Cov khoom tseem ceeb ntawm cov hmoov calcium grey yog: Ca (OH) 2, CaO thiab ib qho me me ntawm CaCO3 sib xyaw, CaO + H2O = Ca (OH) 2 - Ca (OH) 2 + CO2 = CaCO3↓ + H2O grey calcium hauv dej thiab huab cua nyob rau hauv qhov kev txiav txim ntawm CO2, tsim cov calcium carbonate, thiab HPMC tsuas yog dej, auxiliary grey calcium zoo dua cov tshuaj tiv thaiv, nws tus kheej tsis koom nrog cov tshuaj tiv thaiv.

HPMC yog non-ionic cellulose ether, yog li dab tsi yog non-ionic?

A: Feem ntau hais lus, non-ions yog cov khoom uas tsis ionize hauv dej. Ionization yog dissociation ntawm ib qho electrolyte mus rau dawb-tsav ions nyob rau hauv ib qho hnyav hnyav, xws li dej los yog cawv. Piv txwv li, ntsev peb noj txhua hnub - sodium chloride (NaCl) yaj hauv dej thiab ionizes los tsim cov sodium ions dawb txav (Na +) nrog cov nqi zoo thiab chloride ions (Cl) nrog tus nqi tsis zoo. Ntawd yog, HPMC hauv dej tsis cuam tshuam rau hauv cov khoom siv hluav taws xob, tab sis muaj nyob hauv cov molecules.

Qhov ntsuas kub ntawm hydroxypropyl methyl cellulose yog dab tsi?

Teb: Lub gel kub ntawm HPMC muaj feem xyuam rau cov ntsiab lus methoxyl. Qhov qis dua cov ntsiab lus methoxyl yog, qhov siab dua qhov gel yog.

Skim coat hmoov thiab HPMC tsis muaj kev sib raug zoo?

Teb: Skim tsho tiv no hmoov feem ntau thiab tshauv calcium zoo muaj kev sib raug zoo heev, thiab HPMC tsis muaj kev sib raug zoo heev. Cov ntsiab lus calcium uas tsis tshua muaj ntawm cov calcium grey thiab qhov tsis zoo ntawm CaO thiab Ca (OH) 2 hauv cov calcium grey yuav ua rau cov hmoov poob. Yog tias muaj kev sib raug zoo nrog HPMC, ces cov dej tsis zoo ntawm HPMC kuj yuav ua rau cov hmoov poob.

Dab tsi yog qhov txawv ntawm cov dej txias soluble thiab kub soluble hydroxypropyl methyl cellulose hauv cov txheej txheem tsim khoom?

- Teb: HPMC dej txias instant tov hom yog tom qab glyoxal nto kho, muab tso rau hauv dej txias sai sai dispersed, tab sis tsis tshua yaj, viscosity, yog yaj. Hom thermosoluble tsis tau raug kho nrog glyoxal. Tus nqi ntawm glyoxal yog loj, dispersion yog ceev, tab sis lub viscosity qeeb, tus nqi yog me me, ntawm qhov tsis tooj.

Nws yog dab tsi txog hydroxypropyl methyl cellulose (HPMC) uas tsw?

- Teb: HPMC tsim los ntawm cov txheej txheem hnyav yog ua los ntawm toluene thiab isopropyl cawv. Yog tias ntxuav tsis zoo, yuav muaj qee qhov seem saj.

Kev siv sib txawv, yuav ua li cas xaiv qhov tsim nyog hydroxypropyl methyl cellulose (HPMC)?

- teb: dhuav nrog kev siv cov hmoov me me: qhov yuav tsum tau qis dua, viscosity 100000, ok, nws yog ib qho tseem ceeb los tiv thaiv dej kom ze rau. Daim ntawv thov mortar: xav tau ntau dua, siab viscosity yuav tsum, 150000 kom zoo dua. Daim ntawv thov kua nplaum: qhov xav tau rau cov khoom lag luam tam sim, siab viscosity.

Lwm lub npe rau hydroxypropyl methyl cellulose yog dab tsi?

- Cov lus teb: Hydroxypropyl MethylCellulose, Abbreviated li HPMC los yog MHPC, los yog Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl Cellulose ether.

HPMC nyob rau hauv daim ntawv thov ntawm Skim lub tsho tiv no, dab tsi yog vim li cas Skim lub tsho tiv no npuas?

Teb: HPMC hauv Skim tsho tiv no, thickening, dej thiab kev tsim kho ntawm peb lub luag hauj lwm. Tsis koom nrog kev tawm tsam. Ua npuas ncauj: 1, dej ntau dhau. 2, hauv qab yog tsis qhuav, nyob rau sab saum toj ntawm lub scraping txheej, kuj yooj yim rau blister.

Sab hauv thiab sab nrauv phab ntsa Skim lub tsho tiv no?

- teb: sab hauv phab ntsa Skim coat: calcium 800KG grey calcium 150KG ( starch ether, ntshiab ntsuab, peng runtu, citric acid, polyacrylamide tuaj yeem muab ntxiv kom tsim nyog)

Sab nrauv phab ntsa Skim coat: cement 350KG calcium 500KG quartz xuab zeb 150KG latex hmoov 8-12kg cellulose ether 3KG starch ether 0.5kg ntoo fiber 2KG

Qhov txawv ntawm HPMC thiab MC yog dab tsi?

- Teb: MC yog methyl cellulose, uas yog ua los ntawm cellulose ether los ntawm ib tug series ntawm cov tshuaj tiv thaiv nrog methane chloride raws li etherifying tus neeg saib xyuas tom qab refined paj rwb yog kho nrog alkali. Feem ntau, qhov degree ntawm kev hloov pauv yog 1.6 ~ 2.0, thiab cov solubility sib txawv nrog rau qib ntawm kev hloov pauv. belongs rau nonionic cellulose ether.

(1) Cov dej tuav ntawm methyl cellulose nyob ntawm nws cov nyiaj ntxiv, viscosity, particle fineness thiab dissolution tus nqi. Feem ntau ntxiv cov nyiaj loj, me me fineness, viscosity, dej tuav tus nqi siab. Ntawm lawv, tus nqi ntawm cov khoom ntxiv muaj qhov cuam tshuam loj tshaj plaws ntawm cov dej tuav, thiab cov viscosity tsis yog proportional rau cov dej tuav. Tus nqi dissolution feem ntau yog nyob ntawm qhov kev hloov kho ntawm qhov chaw thiab qhov zoo ntawm cov khoom siv cellulose. Hauv cov saum toj no ob peb cellulose ethers, methyl cellulose thiab hydroxypropyl methyl cellulose dej tuav tus nqi siab dua.

(2) Methyl cellulose yog soluble hauv dej txias, uas nyuaj rau yaj hauv dej kub. Nws cov tshuaj aqueous yog ruaj khov nyob rau hauv pH = 3 ~ 12. Nws muaj kev sib raug zoo nrog cov hmoov txhuv nplej siab, guanidine cov pos hniav thiab ntau surfactants. Gelation tshwm sim thaum qhov kub nce mus txog qhov kub thiab txias.

(3) Kev hloov ntawm qhov kub thiab txias yuav cuam tshuam rau cov dej tuav tus nqi ntawm methyl cellulose. Feem ntau, qhov kub thiab txias dua, qhov dej khaws cia tsis zoo. Yog hais tias qhov kub ntawm mortar ntau tshaj 40 ℃, cov dej tuav ntawm methyl cellulose yuav loj zuj zus, uas cuam tshuam rau lub constructability ntawm mortar.

(4) Methyl cellulose muaj kev cuam tshuam rau kev tsim kho thiab adhesion ntawm mortar. "Adhesion" ntawm no yog hais txog qhov adhesion xav tau los ntawm tus neeg ua haujlwm ntawm lub cuab yeej thiab cov phab ntsa substrate, uas yog lub shear tsis kam ntawm lub mortar. Adhesion yog loj, shear resistance ntawm mortar yog loj, lub zog yuav tsum tau los ntawm cov neeg ua hauj lwm nyob rau hauv tus txheej txheem ntawm kev siv kuj loj, thiab kev tsim kho ntawm mortar yog tsis zoo. Hauv cov khoom lag luam cellulose ether, qhov adhesion ntawm methyl cellulose yog nyob rau theem nrab.

HPMC hydroxypropyl methyl cellulose, yog refined los ntawm paj rwb tom qab alkali kev kho mob, nrog propylene oxide thiab chloromethane ua etherifying tus neeg saib xyuas, los ntawm ib tug series ntawm cov tshuaj tiv thaiv thiab ua los ntawm non-ionic cellulose tov ether. Qhov kev hloov pauv feem ntau yog 1.2 ~ 2.0. Nws cov khoom sib txawv nrog qhov feem ntawm methoxy thiab hydroxypropyl cov ntsiab lus.

(1) Hydroxypropyl methyl cellulose yog yooj yim soluble nyob rau hauv dej txias, uas yog ib qho nyuaj rau yaj nyob rau hauv dej kub. Txawm li cas los xij, nws qhov kub thiab txias hauv dej kub yog pom tseeb siab dua li ntawm methyl cellulose. Lub solubility ntawm methyl cellulose hauv dej txias kuj tau txhim kho zoo heev.

(2) Lub viscosity ntawm hydroxypropyl methyl cellulose muaj feem xyuam rau nws qhov hnyav molecular, thiab siab dua qhov hnyav molecular, qhov viscosity siab dua. Kub kuj cuam tshuam viscosity. viscosity txo qis thaum kub nce. Tab sis nws cov viscosity siab kub nyhuv yog qis dua li ntawm methyl cellulose. Cov tshuaj yog ruaj khov thaum khaws cia ntawm chav tsev kub.

(3) Hydroxypropyl methyl cellulose yog ruaj khov rau cov kua qaub thiab lub hauv paus, thiab nws cov kua aqueous yog ruaj khov nyob rau hauv thaj tsam ntawm pH = 2 ~ 12. Caustic dej qab zib thiab txiv qaub dej tsis tshua muaj txiaj ntsig rau nws cov khoom, tab sis alkali tuaj yeem ua kom nws qhov kev sib cais thiab txhim kho cov viscosity. Hydroxypropyl methyl cellulose yog qhov ruaj khov rau cov ntsev dav dav, tab sis thaum lub concentration ntawm ntsev tov yog siab, lub viscosity ntawm hydroxypropyl methyl cellulose tov yuav nce.

(4) Cov dej tuav ntawm hydroxypropyl methyl cellulose nyob ntawm nws qhov ntau npaum thiab viscosity, thiab cov dej tuav tus nqi ntawm hydroxypropyl methyl cellulose yog siab dua li ntawm methyl cellulose ntawm tib qhov ntau npaum li cas.

(5) Hydroxypropyl methyl cellulose tuaj yeem tov nrog dej-soluble polymer tebchaw los ua ib yam, ntau dua viscosity tov. Xws li polyvinyl cawv, starch ether, zaub kua nplaum thiab lwm yam.

(6) Lub adhesion ntawm hydroxypropyl methyl cellulose rau mortar siv yog siab dua li ntawm methyl cellulose.

(7) Hydroxypropyl methyl cellulose muaj enzyme zoo dua li methyl cellulose, thiab nws cov tshuaj enzyme degradation tau qis dua li ntawm methyl cellulose.

Dab tsi yuav tsum tau them nyiaj mloog rau hauv kev siv tswv yim txog kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC?

Teb: Lub viscosity ntawm HPMC yog inversely proportional rau kub, uas yog hais tias, lub viscosity nce nrog rau qhov kub thiab txias. Thaum peb tham txog viscosity ntawm ib yam khoom, peb tab tom tham txog viscosity ntawm 2% ntawm cov khoom hauv dej ntawm 20 degrees Celsius.

Hauv kev siv tswv yim, nyob rau hauv cov cheeb tsam uas muaj qhov sib txawv ntawm qhov kub ntawm lub caij ntuj sov thiab lub caij ntuj no, nws yuav tsum tau muab sau tseg tias nws raug pom zoo kom siv cov viscosity tsawg nyob rau lub caij ntuj no, uas yog qhov zoo rau kev tsim kho. Txwv tsis pub, thaum qhov kub thiab txias qis, viscosity ntawm cellulose yuav nce, thiab thaum khawb, qhov xav yuav hnyav.

Nruab nrab viscosity: 75000-100000 feem ntau yog siv rau putty

Yog vim li cas: tuav dej zoo

High viscosity: HPMC 150000-200000 yog tsuas yog siv rau polystyrene particle rwb thaiv tsev mortar kua nplaum cov ntaub ntawv thiab vitrified hlaws rwb thaiv tsev mortar.

Yog vim li cas: siab viscosity, mortar tsis yooj yim rau poob, ntws dai, txhim kho kev tsim kho.

Tab sis feem ntau hais lus, qhov siab dua qhov viscosity, qhov zoo dua cov dej tuav, yog li ntau cov mortar qhuav, xav txog tus nqi, siv nruab nrab viscosity HPMC cellulose (75000-100000) los hloov nruab nrab thiab qis viscosity HPMC cellulose (20000-40000) kom txo tau. tus nqi ntxiv.