noj 11

xov xwm

HPMC kev daws teeb meem

1, Dab tsi yog qhov tseem ceeb ntawm kev siv hydroxypropyl methyl cellulose (HPMC)?

Teb:HPMC yog siv dav hauv cov khoom siv hauv tsev, coatings, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textile, kev ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam.HPMC tuaj yeem muab faib ua: qib kev tsim kho, qib zaub mov thiab qib kho mob raws li kev siv.Tam sim no cov khoom siv hauv tsev feem ntau yog qib kev tsim kho, hauv qib kev tsim kho, cov hmoov putty yog loj heev, li 90% yog siv los ua cov hmoov putty, tus so yog siv los ua cov cement mortar thiab kua nplaum.

2, hydroxypropyl methyl cellulose (HPMC) muab faib ua ob peb hom, qhov txawv ntawm nws siv yog dab tsi?

Teb:HPMC tuaj yeem muab faib ua tam sim thiab kub soluble, cov khoom lag luam tam sim, hauv dej txias sai sai, ploj mus hauv dej, lub sijhawm no cov kua tsis muaj viscosity, vim HPMC tsuas yog tawg hauv dej, tsis muaj kev sib cais tiag tiag.Txog 2 feeb, cov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab viscous colloid.Thaum tshav kub kub soluble khoom, nyob rau hauv dej txias agglomeration, yuav nyob rau hauv dej kub, sai sai dispersed, ploj nyob rau hauv dej kub, kom txog rau thaum lub kub poob mus rau ib tug tej yam kub, viscosity maj mam tshwm, kom txog rau thaum lub tsim ntawm pob tshab viscous colloid.Thaum tshav kub kub soluble hom tsuas yog siv rau hauv cov hmoov putty thiab mortar, nyob rau hauv kua kua nplaum thiab txheej, tuaj yeem tshwm agglomeration tshwm sim, tsis tuaj yeem siv.Instant yaj qauv, daim ntawv thov Scope yog ib tug ob peb wider, nyob rau hauv yuav dhuav nrog me nyuam hmoov thiab mortar, thiab nyob rau hauv kua kua nplaum thiab txheej, tag nrho cov yuav siv tau, tsis muaj dab tsi taboo.

3, hydroxypropyl methyl cellulose (HPMC) txoj kev sib cais muaj cov?

- teb: txoj kev sib cais dej kub: vim tias HPMC tsis yaj hauv dej kub, yog li HPMC thaum ntxov tuaj yeem sib cais hauv cov dej kub, thiab tom qab ntawd yaj sai sai thaum txias, ob txoj kev raug piav qhia raws li hauv qab no:

1) Sau lub thawv nrog dej kub ntau npaum li koj xav tau thiab ua kom sov li ntawm 70 ℃.Hydroxypropyl methyl cellulose yog maj mam ntxiv nyob rau hauv qeeb stirring, thiab HPMC ntab rau saum npoo dej, thiab ces maj mam tsim ib slurry, uas yog txias nyob rau hauv stirring.

2) Ntxiv 1/3 lossis 2/3 ntawm cov dej xav tau rau hauv lub thawv thiab ua kom sov rau 70 ℃.Disperse HPMC raws li txoj kev 1) los npaj cov dej kub slurry;Tom qab ntawd ntxiv cov dej txias ntxiv rau cov dej kub slurry thiab txias qhov sib tov tom qab stirring.

Txoj kev sib xyaw hmoov: HPMC hmoov thiab ntau lwm cov khoom xyaw hmoov, tag nrho tov nrog rab, ces ntxiv dej kom yaj, lub sij hawm no HPMC tuaj yeem yaj, thiab tsis agglomerate, vim txhua lub ces kaum me me, tsuas yog me ntsis HPMC hmoov, dej. yuav tam sim ntawd yaj.- Putty hmoov thiab mortar manufacturers siv txoj kev no.[Hydroxypropyl methyl cellulose (HPMC) siv los ua tus neeg sawv cev thickening thiab dej tuav tus neeg sawv cev hauv cov hmoov hmoov mortar.

4, Yuav ua li cas txiav txim siab qhov zoo ntawm hydroxypropyl methyl cellulose (HPMC) yooj yim thiab intuitive?

Teb: (1) whiteness: txawm tias whiteness tsis tuaj yeem txiav txim siab seb HPMC puas zoo, thiab yog tias nws ntxiv rau hauv cov txheej txheem ntau lawm whitener, yuav cuam tshuam rau nws qhov zoo.Txawm li cas los xij, cov khoom lag luam zoo feem ntau muaj cov xim zoo nkauj.(2) fineness: HPMC fineness feem ntau yog 80 mesh thiab 100 mesh, 120 lub hom phiaj tsawg, Hebei HPMC feem ntau 80 mesh, lub finer lub fineness, feem ntau hais lus, zoo dua.(3) transmittance: hydroxypropyl methyl cellulose (HPMC) rau hauv dej, tsim cov pob tshab colloid, pom nws transmittance, qhov ntau dua qhov transmittance yog qhov zoo dua, cov khoom insoluble hauv tsawg dua.Kev xa tawm ntawm ntsug reactor feem ntau yog qhov zoo, thiab cov kab rov tav reactor yog qhov phem dua, tab sis nws tsis tau txhais hais tias qhov zoo ntawm cov khoom siv ntsug reactor zoo dua li cov kab rov tav reactor.Muaj ntau yam los txiav txim qhov zoo ntawm cov khoom.(4) Qhov Loj: qhov loj dua qhov sib piv, qhov hnyav dua qhov zoo dua.Tshaj qhov loj, vim hais tias hauv hydroxyl propyl puag cov ntsiab lus yog siab heev, hydroxyl propyl puag cov ntsiab lus siab, tiv thaiv dej kom zoo dua.

5, hydroxypropyl methyl cellulose (HPMC) viscosity puas tsim nyog?

- teb: yuav dhuav nrog me nyuam hmoov yog ok feem ntau 100 txhiab, ib co siab ntawm qhov yuav tsum tau nyob rau hauv mortar, xav 150 txhiab 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 cov hmoov nplej, tsuav yog cov dej tuav tau zoo, qhov viscosity tsawg (7-80 txhiab), 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, viscosity ntawm dej tuav tsis ntau.

6, hydroxypropyl methyl cellulose (HPMC) yog dab tsi yog qhov kev qhia tseem ceeb?.

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.

7, 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.

8, HPMC nyob rau hauv daim ntawv thov ntawm putty hmoov, lub luag hauj lwm tseem ceeb, seb qhov tshwm sim ntawm chemistry?

Teb:HPMC nyob rau hauv putty hmoov, thickening, dej thiab kev tsim kho ntawm peb lub luag hauj lwm.Thickening: cellulose tuaj yeem thickened rau ncua kev kawm ntawv, kom cov tshuaj nyob twj ywm ib yam li thiab down lub luag hauj lwm ntawm anti-flow dai.Kev tuav dej: ua kom cov hmoov qhuav qhuav maj mam, pabcuam grey calcium nyob rau hauv qhov kev txiav txim ntawm cov tshuaj tiv thaiv dej.Kev tsim kho: cellulose lubrication, tuaj yeem ua cov hmoov putty 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.Putty hmoov thiab dej, ntawm phab ntsa, yog cov tshuaj tiv thaiv, vim yog tsim cov tshuaj tshiab, cov phab ntsa ntawm cov hmoov putty poob los ntawm phab ntsa, hauv av rau hauv hmoov, thiab tom qab ntawd siv, tsis zoo, vim tau tsim cov tshuaj tshiab. (calcium carbonate).Lub ntsiab muaj pes tsawg leeg ntawm grey calcium hmoov yog sib tov ntawm Ca (OH) 2, CaO thiab ib tug me me ntawm CaCO3, CaO + H2O = Ca (OH) 2 — Ca (OH) 2 + CO2 = CaCO3↓ + H2O Grey calcium nyob rau hauv dej thiab huab cua nyob rau hauv qhov kev txiav txim ntawm CO2, calcium carbonate, thiab HPMC tsuas yog dej, pab grey calcium zoo dua cov tshuaj tiv thaiv, nws tus kheej tsis koom nrog cov tshuaj tiv thaiv.

9.HPMC 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.

10. Dab tsi yog cuam tshuam rau gel kub ntawm hydroxypropyl methyl cellulose?

- Teb: Lub gel kub ntawm HPMC muaj feem xyuam rau cov ntsiab lus methoxyl, qis dua cov ntsiab lus methoxyl ↓, qhov kub ntawm gel ntau dua.

11, putty hmoov hmoov thiab HPMC tsis muaj kev sib raug zoo?

Teb: putty hmoov poob hmoov feem ntau thiab cov hmoov 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 me ntsis nrog HPMC, ces HPMC dej tuav tsis zoo, kuj yuav ua rau cov hmoov.

12, hydroxypropyl methyl cellulose dej txias soluble thiab kub soluble nyob rau hauv cov txheej txheem ntau lawm ntawm qhov txawv yog dab tsi?

- 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.

13, hydroxypropyl methyl cellulose (HPMC) tsw yog nws li cas?

- 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.

14, kev siv sib txawv, yuav ua li cas xaiv txoj cai hydroxypropyl methyl cellulose (HPMC)?

- teb: dhuav nrog kev siv cov hmoov me me: qhov yuav tsum tau muaj qis dua, viscosity 100 txhiab, ok, nws yog ib qho tseem ceeb los tiv thaiv dej kom ze rau.Daim ntawv thov mortar: kev xav tau siab dua, siab viscosity yuav tsum, 150 txhiab kom zoo dua.Daim ntawv thov kua nplaum: qhov xav tau rau cov khoom lag luam tam sim, siab viscosity.

15.Dab tsi yog lub npe hu ua hydroxypropyl methyl cellulose?

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

16.HPMC nyob rau hauv daim ntawv thov ntawm putty hmoov, putty hmoov npuas yog vim li cas?

Teb: HPMC nyob rau hauv putty hmoov, 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.

17. 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 rau 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.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.

18. Dab tsi yuav tsum tau them rau hauv kev siv tswv yim ntawm 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: 150000-200000 yog tsuas yog siv rau polystyrene particle rwb thaiv tsev mortar roj hmab hmoov 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 dej tuav tau zoo dua, yog li ntau cov mortar qhuav factories, xav txog tus nqi, siv nruab nrab viscosity cellulose (75000-100000) los hloov nruab nrab thiab qis viscosity cellulose (20000-40000) kom txo tau tus nqi. ntawm qhov ntxiv.


Lub sij hawm xa tuaj: Mar-30-2022