HPMC hauv Skim txheej

Hydroxypropyl methyl cellulose (HPMC) viscosity rau skim txheej?

– teb: Skim txheej yog ok feem ntau HPMC 100000cps, qee qhov siab dua ntawm qhov xav tau 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 thickening. Hauv Skim txheej, tsuav yog qhov khaws dej zoo, qhov viscosity qis (7-80000), nws kuj ua tau, ntawm chav kawm, qhov viscosity loj dua, qhov khaws dej zoo dua, thaum viscosity ntau dua 100 txhiab, qhov viscosity ntawm kev khaws dej tsis ntau.

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

Lus Teb: Cov ntsiab lus Hydroxypropyl thiab viscosity, feem ntau cov neeg siv mob siab txog ob qho cim no. Cov ntsiab lus Hydroxypropyl siab, kev khaws dej feem ntau zoo dua. Viscosity, kev khaws dej, txheeb ze (tab sis tsis yog qhov tseeb) kuj zoo dua, thiab viscosity, cement mortar zoo dua los siv qee qhov.

Hydroxypropyl methyl cellulose (HPMC) cov khoom siv tseem ceeb yog dab tsi?

Lus Teb: hydroxypropyl methyl cellulose (HPMC) cov khoom siv tseem ceeb: paj rwb refined, chloromethane, propylene oxide, lwm yam khoom siv raw, ntsiav tshuaj alkali, acid, toluene, isopropyl cawv thiab lwm yam.

HPMC hauv Skim tsho hauv daim ntawv thov, lub luag haujlwm tseem ceeb, seb puas yog tshuaj lom neeg?

Lus Teb: HPMC hauv Skim txheej, thickening, dej thiab kev tsim kho ntawm peb lub luag haujlwm. Thickening: cellulose tuaj yeem thickened rau kev ncua, yog li cov tshuaj tseem sib xws nce thiab nqis lub luag haujlwm ntawm kev tiv thaiv kev ntws dai. Kev khaws dej: ua rau Skim txheej qhuav qeeb qeeb, pab calcium grey hauv kev ua haujlwm ntawm dej tshuaj tiv thaiv. Kev tsim kho: cellulose lubrication, tuaj yeem ua rau Skim txheej muaj kev tsim kho zoo. HPMC tsis koom nrog kev tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm txhawb nqa. Skim txheej thiab dej, ntawm phab ntsa, yog kev tshuaj tiv thaiv, vim yog tiam ntawm cov tshuaj tshiab, phab ntsa ntawm Skim txheej nqes los ntawm phab ntsa, zom ua hmoov, thiab tom qab ntawd siv, tsis zoo, vim tau tsim cov tshuaj tshiab (calcium carbonate). Cov khoom tseem ceeb ntawm cov hmoov calcium grey yog: Ca(OH)2, CaO thiab me me ntawm CaCO3 sib tov, CaO+H2O=Ca(OH)2 – Ca(OH)2+CO2=CaCO3↓+H2O grey calcium hauv dej thiab huab cua nyob rau hauv qhov kev ua ntawm CO2, kev tsim cov calcium carbonate, thiab HPMC tsuas yog dej, cov tshuaj calcium grey zoo dua, nws tus kheej tsis koom nrog hauv kev tshuaj tiv thaiv.

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

A: Feem ntau hais lus, cov non-ions yog cov tshuaj uas tsis ionize hauv dej. Ionization yog qhov kev sib cais ntawm electrolyte mus rau hauv cov ions them dawb hauv cov kuab tshuaj tshwj xeeb, xws li dej lossis cawv. Piv txwv li, cov ntsev peb noj txhua hnub - sodium chloride (NaCl) yaj hauv dej thiab ionizes los tsim cov sodium ions (Na +) uas muaj tus nqi zoo thiab chloride ions (Cl) uas muaj tus nqi tsis zoo. Ntawd yog, HPMC hauv dej tsis dissociate mus rau hauv cov ions them, tab sis muaj nyob ua molecules.

Qhov kub ntawm hydroxypropyl methyl cellulose gelation muaj feem xyuam li cas?

Lus Teb: Qhov kub ntawm HPMC gel muaj feem cuam tshuam nrog cov ntsiab lus methoxyl. Cov ntsiab lus methoxyl qis dua, qhov kub ntawm gel siab dua.

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

Lus Teb: Cov hmoov skim coat feem ntau thiab cov calcium zoo ntawm cov tshauv muaj kev sib raug zoo heev, thiab HPMC tsis muaj kev sib raug zoo loj heev. Cov calcium uas tsis muaj ntau hauv cov calcium grey thiab qhov sib piv tsis raug 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 tseem yuav ua rau cov hmoov poob.

Qhov txawv ntawm cov dej txias soluble thiab cov dej kub soluble hydroxypropyl methyl cellulose hauv cov txheej txheem ntau lawm yog dab tsi?

– Lus Teb: HPMC dej txias hom tshuaj tam sim ntawd yog tom qab kev kho qhov chaw glyoxal, muab tso rau hauv dej txias sai sai dispersed, tab sis tsis yaj tiag tiag, viscosity nce, yog yaj. Hom thermosoluble tsis tau kho qhov chaw nrog glyoxal. Tus nqi ntawm glyoxal yog loj, qhov dispersion yog ceev, tab sis viscosity yog qeeb, tus nqi yog me me, ntawm qhov tsis sib xws.

Dab tsi yog nws txog hydroxypropyl methyl cellulose (HPMC) uas muaj ntxhiab tsw?

– Lus Teb: HPMC tsim los ntawm txoj kev yaj yog ua los ntawm toluene thiab isopropyl cawv. Yog tias ntxuav tsis zoo heev, yuav muaj qee qhov saj seem.

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

– teb: dhuav nrog daim ntawv thov ntawm cov hmoov menyuam yaus: 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: qhov yuav tsum tau siab dua, qhov yuav tsum tau viscosity siab, 150000 kom zoo dua. Daim ntawv thov kua nplaum: qhov xav tau cov khoom lag luam tam sim ntawd, viscosity siab.

Lub npe hu ua hydroxypropyl methyl cellulose yog dab tsi?

– LUS TEB: Hydroxypropyl MethylCellulose, Luv ua HPMC lossis MHPC, lossis Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl Cellulose ether.

HPMC hauv daim ntawv thov ntawm Skim tsho, vim li cas Skim tsho npuas?

Lus Teb: HPMC hauv Skim txheej, thickening, dej thiab kev tsim kho ntawm peb lub luag haujlwm. Tsis koom nrog hauv kev tshuaj tiv thaiv. Ua rau muaj npuas: 1, dej ntau dhau. 2, hauv qab tsis qhuav, nyob rau sab saum toj ntawm txheej scraping, kuj yooj yim rau blister.

Sab hauv thiab sab nraud phab ntsa Skim coat mis?

– teb: phab ntsa sab hauv Skim txheej: calcium 800KG grey calcium 150KG (starch ether, ntshiab ntsuab, peng runtu, citric acid, polyacrylamide tuaj yeem ntxiv kom haum)

Phab ntsa sab nraud Skim txheej: cement 350KG calcium 500KG quartz xuab zeb 150KG hmoov latex 8-12kg cellulose ether 3KG hmoov txhuv nplej siab ether 0.5kg ntoo fiber 2KG

Qhov txawv ntawm HPMC thiab MC yog dab tsi?

– Lus Teb: MC yog methyl cellulose, uas yog ua los ntawm cellulose ether los ntawm ntau yam kev sib xyaw nrog methane chloride ua tus neeg sawv cev etherifying tom qab paj rwb refined kho nrog alkali. Feem ntau, qib ntawm kev hloov pauv yog 1.6 ~ 2.0, thiab qhov solubility sib txawv nrog qib ntawm kev hloov pauv. Koom nrog nonionic cellulose ether.

(1) Qhov khaws dej ntawm methyl cellulose nyob ntawm nws qhov ntxiv ntau npaum li cas, viscosity, particle fineness thiab dissolving rate. Feem ntau ntxiv ntau npaum li cas, me me fineness, viscosity, dej retention rate siab. Ntawm lawv, qhov ntau ntawm cov additive muaj qhov cuam tshuam loj tshaj plaws rau dej retention, thiab viscosity tsis sib npaug rau dej retention. Qhov dissolving rate feem ntau nyob ntawm qhov kev hloov pauv ntawm qhov chaw thiab particle fineness ntawm cellulose particles. Hauv ntau cov cellulose ethers saum toj no, methyl cellulose thiab hydroxypropyl methyl cellulose dej retention rate siab dua.

(2) Methyl cellulose yaj tau hauv dej txias, uas nyuaj rau yaj hauv dej kub. Nws cov kua dej ruaj khov heev hauv pH = 3 ~ 12. Nws muaj kev sib raug zoo nrog cov hmoov txhuv nplej siab, guanidine gum thiab ntau yam surfactants. Gelation tshwm sim thaum qhov kub ncav cuag qhov kub gelation.

(3) Qhov kev hloov pauv ntawm qhov kub thiab txias yuav cuam tshuam loj heev rau qhov ceev ntawm cov dej ntawm methyl cellulose. Feem ntau, qhov kub siab dua, qhov kev khaws dej phem dua. Yog tias qhov kub ntawm cov mortar tshaj 40 ℃, qhov kev khaws dej ntawm methyl cellulose yuav phem dua, uas cuam tshuam loj heev rau kev tsim kho ntawm cov mortar.

(4) Methyl cellulose muaj feem cuam tshuam rau qhov kev tsim kho thiab kev nplaum ntawm cov mortar. "Kev nplaum" ntawm no yog hais txog qhov kev nplaum uas tus neeg ua haujlwm hnov ​​ntawm cov cuab yeej thiab cov phab ntsa substrate, uas yog qhov kev tiv thaiv shear ntawm cov mortar. Kev nplaum yog loj, qhov kev tiv thaiv shear ntawm cov mortar yog loj, lub zog uas cov neeg ua haujlwm xav tau hauv cov txheej txheem siv kuj loj, thiab kev tsim kho ntawm cov mortar tsis zoo. Hauv cov khoom cellulose ether, qhov kev nplaum ntawm methyl cellulose yog nyob rau theem nruab nrab.

HPMC hydroxypropyl methyl cellulose, yog ua los ntawm paj rwb tom qab kho alkali, nrog propylene oxide thiab chloromethane ua tus neeg sawv cev etherifying, los ntawm ntau qhov kev tshuaj tiv thaiv thiab ua los ntawm cov non-ionic cellulose sib xyaw ether. Qhov degree ntawm kev hloov pauv feem ntau yog 1.2 ~ 2.0. Nws cov khoom sib txawv nrog qhov sib piv ntawm methoxy thiab hydroxypropyl cov ntsiab lus.

(1) Hydroxypropyl methyl cellulose yooj yim yaj hauv dej txias, uas nyuaj rau yaj hauv dej kub. Txawm li cas los xij, nws qhov kub gelation hauv dej kub yog qhov siab dua li ntawm methyl cellulose. Qhov solubility ntawm methyl cellulose hauv dej txias kuj tau txhim kho zoo heev.

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

(3) Hydroxypropyl methyl cellulose ruaj khov rau cov kua qaub thiab cov hauv paus, thiab nws cov kua dej ruaj khov heev hauv pH = 2 ~ 12. Caustic soda thiab dej txiv qaub tsis muaj feem cuam tshuam rau nws cov khoom, tab sis alkali tuaj yeem ua kom nws cov nqi yaj sai dua thiab txhim kho qhov viscosity. Hydroxypropyl methyl cellulose ruaj khov rau cov ntsev dav dav, tab sis thaum qhov concentration ntawm cov ntsev daws siab, qhov viscosity ntawm hydroxypropyl methyl cellulose kua feem ntau nce.

(4) Qhov khaws cia dej ntawm hydroxypropyl methyl cellulose nyob ntawm nws cov koob tshuaj thiab viscosity, thiab qhov ceev khaws cia dej ntawm hydroxypropyl methyl cellulose siab dua li ntawm methyl cellulose ntawm tib koob tshuaj.

(5) Hydroxypropyl methyl cellulose tuaj yeem sib xyaw nrog cov polymer sib xyaw uas yaj tau hauv dej kom ua cov kua nplaum sib xws, viscosity siab dua. Xws li polyvinyl cawv, hmoov txhuv nplej siab ether, kua nplaum zaub thiab lwm yam.

(6) Qhov nplaum ntawm hydroxypropyl methyl cellulose rau kev tsim kho mortar siab dua li ntawm methyl cellulose.

(7) Hydroxypropyl methyl cellulose muaj kev tiv thaiv enzyme zoo dua li methyl cellulose, thiab nws qhov kev puas tsuaj ntawm cov enzyme hauv kev daws teeb meem qis dua li ntawm methyl cellulose.

Yuav tsum tau them sai sai rau qhov kev siv tiag tiag txog kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC li cas?

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

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

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

Vim li cas: Kev khaws dej zoo

Siab viscosity: HPMC 150000-200000 feem ntau yog siv rau polystyrene particle rwb thaiv tsev mortar kua nplaum hmoov khoom thiab vitrified hlaws dai rwb thaiv tsev mortar.

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

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