1, Dab tsi yog qhov tseem ceeb ntawm kev siv hydroxypropyl methyl cellulose (HPMC)?
HPMCyog dav siv nyob rau hauv lub tsev cov ntaub ntawv, coatings, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textile, 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 los ntawm kev siv. Tam sim no, feem ntau ntawm cov qib kev tsim kho hauv tsev, hauv qib kev tsim kho, cov hmoov putty hmoov yog loj, li ntawm 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, qhov txawv ntawm nws siv yog dab tsi?
HPMC tuaj yeem muab faib ua cov tshuaj tam sim thiab cov tshuaj kub kub, cov khoom siv tshuaj tua kab mob sai sai, tawg sai sai hauv dej txias, ploj hauv dej, lub sijhawm no cov kua dej tsis muaj viscosity, vim tias HPMC tsuas yog tawg hauv dej, tsis muaj kev tawg tiag. Txog 2 feeb, cov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab viscous colloid. Cov khoom kub soluble, hauv dej txias, tuaj yeem tawg sai sai hauv dej kub, ploj mus rau hauv dej kub, thaum qhov kub thiab txias poob mus rau qhov kub thiab txias, viscosity maj mam tshwm, kom txog thaum tsim cov pob tshab viscous colloid. Cov tshuaj kub tsuas yog siv rau hauv cov hmoov putty thiab mortar, nyob rau hauv cov kua kua nplaum thiab xim, yuav muaj ib pab pawg phenomenon, siv tsis tau. TSEV KAWM NTAWV SOLUTION MODEL, SIV NTAWM APPLICATION yog ib tug ob peb wider, nyob rau hauv bored nrog me nyuam hmoov hmoov thiab mortar, thiab nyob rau hauv kua kua thiab coatings, txhua yam siv tau, yam tsis muaj kev CONTRAINDICATION.
3, hydroxypropyl methyl cellulose (HPMC) solubility txoj kev muaj cov?
Txoj kev sib cais dej kub: Vim tias HPMC tsis yaj hauv dej kub, yog li HPMC thaum ntxov tuaj yeem sib cais nyob rau hauv dej kub, ces yaj sai sai thaum txias, ob txoj kev raug piav raws li hauv qab no:
1) Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom sov li ntawm 70 ℃. Maj mam ntxiv hydroxypropyl methylcellulose nyob rau hauv qeeb stirring, HPMC pib ntab rau saum npoo dej, thiab ces maj mam tsim ib slurry, nyob rau hauv stirring txias slurry.
2), ntxiv qhov xav tau ntawm 1/3 lossis 2/3 dej hauv lub thawv, thiab cua sov rau 70 ℃, raws li txoj kev 1), HPMC dispersion, npaj cov dej kub slurry; Tom qab ntawd ntxiv qhov seem ntawm cov dej txias rau hauv cov slurry kub, do thiab txias qhov sib tov.
Txoj kev sib xyaw hmoov: HPMC hmoov thiab ntau lwm cov khoom xyaw hmoov, sib tov zoo nrog ib rab diav, tom qab ntxiv dej kom yaj, ces HPMC tuaj yeem yaj nyob rau lub sijhawm no, tab sis tsis sib koom ua ke, vim txhua lub ces kaum me me, tsuas yog HPMC hmoov me ntsis. , dej yuav sai sai yaj. - Putty hmoov thiab mortar ntau lawm cov tuam txhab siv txoj kev no. Hydroxypropyl methyl cellulose (HPMC) yog 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 yooj yim thiab intuitive los txiav txim qhov zoo ntawm hydroxypropyl methyl cellulose (HPMC)?
(1) whiteness: Txawm hais tias dawb tsis tuaj yeem txiav txim siab seb HPMC puas siv tau yooj yim, thiab yog tias nws ntxiv rau hauv cov txheej txheem tsim cov tshuaj ntxuav hniav dawb, yuav cuam tshuam rau nws qhov zoo. Txawm li cas los xij, cov khoom zoo feem ntau yog dawb.
(2) fineness: HPMC fineness feem ntau 80 mesh thiab 100 mesh, 120 tsawg lub hom phiaj, Hebei HPMC feem ntau 80 mesh, lub finer lub fineness, feem ntau zoo dua.
(3) transmittance: hydroxypropyl methyl cellulose (HPMC) mus rau hauv dej, tsim ib pob tshab colloid, pom nws transmittance, ntau dua qhov transmittance, qhov zoo dua, cov khoom insoluble tsawg dua hauv. Lub permeability ntawm ntsug reactor feem ntau yog qhov zoo, kab rov tav reactor yog qhov phem dua, tab sis tsis tuaj yeem qhia tau tias qhov zoo ntawm cov khoom siv hluav taws xob ntsug yog qhov zoo dua li ntawm cov kab rov tav reactor ntau lawm, cov khoom zoo yog txiav txim siab los ntawm ntau yam.
(4) lub ntiajteb txawj nqus tshwj xeeb: qhov siab dua qhov tshwj xeeb, qhov hnyav dua qhov zoo. Qhov tseem ceeb tshaj, feem ntau vim tias cov ntsiab lus ntawm hydroxypropyl yog siab, cov ntsiab lus hydroxypropyl yog siab, ces cov dej tuav tau zoo dua.
5, hydroxypropyl methyl cellulose (HPMC) nyob rau hauv tus nqi ntawm putty hmoov?
HPMC nyob rau hauv qhov tseeb daim ntawv thov ntawm ntau npaum, los ntawm huab cua puag ncig, kub, lub zos calcium tshauv zoo, putty hmoov mis thiab "cov neeg yuav tsum tau ntawm zoo", thiab muaj sib txawv. Feem ntau hais lus, nruab nrab ntawm plaub thiab tsib kilograms. Piv txwv li: Beijing putty hmoov, feem ntau muab 5 kg; Hauv Guizhou, lawv feem ntau yog 5 kg nyob rau lub caij ntuj sov thiab 4.5 kg nyob rau lub caij ntuj no. Yunnan qhov ntau me me, feem ntau 3 kg -4 kg thiab hais txog.
6, hydroxypropyl methyl cellulose (HPMC) viscosity ntau npaum li cas?
YOG IB TUG ME NYUAM POV THAWJ TIAG TIAG 100 TUG OK, YUAV TSUM TAU TXAIS NYIAJ NYIAJ NYIAJ LAWM, XAV TIAS 150 THUSAND SIV. Ntxiv mus, lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC yog kev tuav dej, ua raws li kev ua kom tuab. Nyob rau hauv cov hmoov nplej, tsuav yog cov dej tuav tau zoo, qhov viscosity tsawg (7-80 txhiab), kuj tseem tuaj yeem ua tau, ntawm chav kawm, viscosity loj dua, cov txheeb ze dej tuav tau zoo dua, thaum lub viscosity ntau dua. 100 txhiab, lub viscosity muaj me ntsis cuam tshuam rau cov dej tuav.
7, hydroxypropyl methyl cellulose (HPMC) yog dab tsi yog qhov kev qhia tseem ceeb?
Hydroxypropyl cov ntsiab lus thiab viscosity, cov neeg siv feem ntau txhawj xeeb nrog 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, hauv cement mortar zoo dua siv qee yam.
8, hydroxypropyl methyl cellulose (HPMC) cov ntaub ntawv tseem ceeb yog dab tsi?
Hydroxypropyl methyl cellulose (HPMC) cov ntaub ntawv tseem ceeb: paj rwb refined, chloromethane, propylene oxide, lwm yam raw khoom, ntsiav tshuaj alkali, acid, toluene, isopropyl cawv thiab hais txog.
9, HPMC nyob rau hauv daim ntawv thov ntawm putty hmoov, dab tsi yog lub luag hauj lwm tseem ceeb, seb chemistry?
HPMC nyob rau hauv putty hmoov, thickening, dej tuav thiab kev tsim kho ntawm peb lub luag hauj lwm. Thickening: Cellulose tuaj yeem ua kom tuab los ua qhov kev ncua, kom cov kev daws teeb meem kom muaj kev sib haum xeeb nce thiab nqis tib lub luag haujlwm, tiv thaiv kev khiav dai. Kev tuav dej: ua kom cov hmoov qhuav qhuav maj mam, pab cov hmoov tshauv calcium cov tshuaj tiv thaiv hauv qab dej. Kev tsim kho: Cellulose muaj cov nyhuv lubricating, tuaj yeem ua cov hmoov putty muaj kev tsim kho zoo. HPMC tsis koom nrog cov tshuaj tiv thaiv, tsuas yog ua lub luag haujlwm pabcuam. Putty hmoov ntxiv dej, rau ntawm phab ntsa, yog tshuaj lom neeg cov tshuaj tiv thaiv, vim hais tias muaj cov tiam ntawm cov khoom tshiab, putty hmoov rau ntawm phab ntsa los ntawm phab ntsa, hauv av rau hauv hmoov, thiab ces siv, nws tsis yog lawm, vim tau tsim ib tug cov khoom siv tshiab (calcium carbonate). Cov khoom tseem ceeb ntawm grey calcium hmoov yog: Ca (OH) 2, CaO thiab ib qho me me ntawm CaCO3 sib tov, CaO + H2O = Ca (OH) 2 - Ca (OH) 2 + CO2 = CaCO3↓ + H2O calcium tshauv hauv dej thiab huab cua nyob rau hauv qhov kev txiav txim ntawm CO2, tsim cov calcium carbonate, thiab HPMC tsuas yog dej tuav, pab calcium tshauv cov tshuaj tiv thaiv zoo dua, nws tus kheej tsis koom nrog cov tshuaj tiv thaiv.
10, HPMC non-ionic cellulose ether, ces dab tsi yog non-ionic?
Nyob rau hauv dav dav, nonionic yog ib yam dab tsi uas tsis ionize nyob rau hauv dej. Ionization yog tus txheej txheem los ntawm cov electrolyte dissociated rau hauv dawb do txav ions nyob rau hauv ib qho hnyav hnyav, xws li dej los yog cawv. Piv txwv li, sodium chloride (NaCl), ntsev peb noj txhua hnub, yaj hauv dej thiab ionizes los tsim cov sodium ions dawb (Na +) uas tau them zoo thiab cov tshuaj chloride ions (Cl) uas tsis zoo. Nyob rau hauv lwm yam lus, HPMC nyob rau hauv dej tsis dissociate rau hauv ions them, tab sis tshwm sim raws li molecules.
11, hydroxypropyl methylcellulose gel kub thiab dab tsi muaj feem xyuam rau?
HPMC gel kub muaj feem xyuam rau nws cov ntsiab lus methoxy, qis dua cov ntsiab lus methoxy ↓, qhov kub ntawm gel ↑ ntau dua.
12. Puas muaj kev sib raug zoo ntawm putty hmoov thiab HPMC?
Putty hmoov hmoov thiab cov calcium zoo muaj kev sib raug zoo, thiab HPMC tsis muaj kev sib raug zoo heev. Cov ntsiab lus calcium uas tsis muaj calcium thiab qhov feem ntawm CaO, Ca(OH)2 hauv calcium tshauv tsis tsim nyog, yuav ua rau hmoov poob. Yog tias nws muaj qee yam ua rau HPMC, ces cov dej tuav ntawm HPMC tsis zoo, nws tseem yuav ua rau cov hmoov poob. Yog vim li cas, thov saib nqe lus nug 9.
13, hydroxypropyl methylcellulose dej txias soluble hom thiab kub soluble hom nyob rau hauv cov txheej txheem ntau lawm, qhov txawv yog dab tsi?
HPMC dej txias soluble hom yog tom qab glyoxal nto kho, nyob rau hauv cov dej txias sai sai dispersed, tab sis tsis tshua yaj, viscosity, yog yaj. Lub tshav kub-soluble hom yog tsis nto kho nrog glyoxal. Lub ntim ntawm glyoxal yog loj, dispersion yog ceev, tab sis lub viscosity yog qeeb, lub ntim yog me me, ntawm qhov tsis tooj.
14, hydroxypropyl methyl cellulose (HPMC) muaj ntxhiab tsw ntawm dab tsi tshwm sim?
HPMC ua los ntawm cov txheej txheem hnyav yog ua los ntawm toluene thiab isopropyl cawv ua hnyav. Yog tias ntxuav tsis zoo, yuav muaj qee qhov seem saj.
15, kev siv sib txawv, yuav ua li cas xaiv txoj cai hydroxypropyl methyl cellulose (HPMC)?
APPLICATION OF putty hmoov: qhov yuav tsum tau qis dua, viscosity yog 100 txhiab, nws yog OK, qhov tseem ceeb yog kom dej zoo dua. Daim ntawv thov ntawm mortar: qhov yuav tsum tau muaj ntau dua, qhov yuav tsum tau muaj viscosity siab, 150 txhiab yuav tsum zoo dua. Daim ntawv thov ntawm cov kua nplaum: xav tau cov khoom tam sim, siab viscosity.
16, hydroxypropyl methylcellulose yog dab tsi?
Hydroxypropyl Methyl Cellulose, Lus Askiv: Hydroxypropyl Methyl Cellulose abbreviation: HPMC los yog MHPC alias: Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Cellulose hydroxypropyl Methyl ether Hypromellose, 2-hydroxypropylmethyl Cellulose ether. Cellulose hydroxypropyl Methyl ether Hyprolose.
17, HPMC nyob rau hauv daim ntawv thov ntawm putty hmoov, putty hmoov npuas yog vim li cas?
HPMC nyob rau hauv putty hmoov, thickening, dej tuav thiab kev tsim kho ntawm peb lub luag hauj lwm. Tsis koom nrog kev tawm tsam. Qhov laj thawj rau cov npuas: 1, dej tso ntau dhau. 2, hauv qab tsis qhuav, nyob rau sab saum toj thiab txhuam ib txheej, kuj yooj yim rau npuas.
18. Putty hmoov mis rau sab hauv thiab sab nrauv phab ntsa?
Putty hmoov rau sab hauv phab ntsa: 800KG ntawm cov calcium hnyav thiab 150KG ntawm cov calcium grey (starch ether, ntshiab ntsuab, peng av, citric acid thiab polyacrylamide tuaj yeem muab ntxiv kom tsim nyog)
Sab nrauv phab ntsa putty hmoov: cement 350KG hnyav calcium 500KG quartz xuab zeb 150KG latex hmoov 8-12kg cellulose ether 3KG starch ether 0.5kg ntoo fiber 2KG
19. Qhov txawv ntawm HPMC thiab MC yog dab tsi?
MC yog methyl cellulose, refined paj rwb tom qab kho alkali, nrog methane chloride ua etherification tus neeg sawv cev, los ntawm ib tug series ntawm cov tshuaj tiv thaiv ua cellulose ether. 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. Nws yog non-ionic cellulose ether.
(1) Cov dej tuav ntawm methyl cellulose nyob ntawm nws qhov sib ntxiv, viscosity, particle fineness thiab dissolution ceev. Feem ntau ntxiv cov nyiaj loj, me me fineness, viscosity, siab dej tuav tus nqi. Ntawm lawv, tus nqi ntxiv rau cov dej tuav tus nqi muaj qhov cuam tshuam loj tshaj plaws, qhov viscosity thiab qib dej tuav tus nqi tsis yog proportional rau kev sib raug zoo. 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 cellulose ether saum toj no, methyl cellulose thiab hydroxypropyl methyl cellulose dej tuav tus nqi siab dua.
(2) Methyl cellulose tuaj yeem yaj hauv dej txias, dej kub yaj yuav ntsib teeb meem, nws cov tshuaj aqueous hauv pH = 3 ~ 12 ntau yam ruaj khov. 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 ntawm gelation.
(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 lub mortar kub siab tshaj 40 ℃, cov dej tuav ntawm methyl cellulose yuav loj heev, cuam tshuam rau kev tsim kho ntawm mortar.
(4) Methyl cellulose muaj kev cuam tshuam rau kev tsim kho thiab adhesion ntawm mortar. Ntawm no, "adhesion" yog hais txog cov nplaum nplaum ntawm tus neeg ua haujlwm daim ntawv thov cov cuab yeej thiab cov phab ntsa substrate, uas yog, shear resistance ntawm lub mortar. Cov cuab yeej nplaum yog loj, shear resistance ntawm mortar yog loj, thiab lub zog yuav tsum tau los ntawm cov neeg ua hauj lwm nyob rau hauv tus txheej txheem ntawm kev siv kuj loj, yog li cov khoom siv ntawm mortar yog tsis zoo. Hauv cov khoom lag luam cellulose ether, methyl cellulose adhesion yog nyob rau theem nruab nrab.
HPMC rau hydroxypropyl methyl cellulose, yog ua los ntawm refined paj rwb tom qab alkalization 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. Kev hloov pauv qib feem ntau yog 1.2 ~ 2.0. Nws cov khoom raug cuam tshuam los ntawm kev faib ua feem ntawm cov ntsiab lus methoxy thiab hydroxypropyl cov ntsiab lus.
(1) hydroxypropyl methyl cellulose soluble hauv dej txias, dej kub yaj yuav ntsib teeb meem. Tab sis nws qhov kub thiab txias hauv dej kub yog siab dua li ntawm methyl cellulose. Lub solubility ntawm methyl cellulose nyob rau hauv dej txias kuj zoo heev.
(2) viscosity ntawm hydroxypropyl methyl cellulose muaj feem xyuam rau nws qhov hnyav molecular, thiab qhov hnyav molecular yog qhov siab viscosity. Kub kuj tseem yuav cuam tshuam rau nws cov viscosity, kub nce, viscosity txo. Txawm li cas los xij, qhov viscosity ntawm qhov kub siab yog qis dua li ntawm methyl cellulose. Cov tshuaj yog ruaj khov thaum khaws cia ntawm chav tsev kub.
(3) hydroxypropyl methyl cellulose ruaj khov rau cov kua qaub thiab alkali, thiab nws cov tshuaj aqueous yog ruaj khov nyob rau hauv thaj tsam ntawm pH = 2 ~ 12. Caustic dej qab zib thiab txiv qaub dej tsis muaj txiaj ntsig zoo rau nws cov khoom, tab sis alkali tuaj yeem ua kom nws qhov kev sib cais thiab txhim kho cov viscosity ntawm tus pin. Hydroxypropyl methyl cellulose muaj kev ruaj ntseg rau cov ntsev dav dav, tab sis thaum lub concentration ntawm ntsev tov yog siab, lub viscosity ntawm hydroxypropyl methyl cellulose tov nyhav nce.
(4) Cov dej tuav ntawm hydroxypropyl methyl cellulose nyob ntawm seb nws qhov ntxiv, viscosity, thiab lwm yam., tib tus nqi ntawm cov dej tuav tau siab dua methyl cellulose.
(5) hydroxypropyl methyl cellulose tuaj yeem tov nrog dej-soluble polymer tebchaw los ua ib qho zoo sib xws, ntau dua viscosity tov. Xws li polyvinyl cawv, starch ether, cog cov pos hniav 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 kev ua haujlwm zoo dua ntawm cov methyl cellulose, thiab qhov ua tau ntawm enzymatic degradation ntawm nws cov tshuaj yog qis dua li ntawm methyl cellulose.
Dab tsi yuav tsum tau them nyiaj mloog rau hauv kev siv tswv yim ntawm kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC?
Lub viscosity ntawm HPMC yog inversely proportional rau kub, uas yog hais tias, lub viscosity nce nrog qhov kub thiab txias. Thaum peb tham txog viscosity ntawm ib yam khoom, peb txhais tau tias qhov tshwm sim ntawm kev ntsuas nws 2% aqueous tov ntawm qhov kub ntawm 20 degrees Celsius.
Hauv kev siv tswv yim, nyob rau hauv cov cheeb tsam uas muaj qhov sib txawv ntawm qhov kub thiab txias ntawm lub caij ntuj sov thiab lub caij ntuj no, yuav tsum tau ua tib zoo saib xyuas cov lus pom zoo kom siv cov viscosity qis dua rau lub caij ntuj no, uas yog qhov zoo rau kev tsim kho. Txwv tsis pub, thaum kub qis, viscosity ntawm cellulose yuav nce, thaum scraping, xav tias 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 hais thermal rwb thaiv tsev mortar hmoov thiab iav hlaws thermal 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 lub tsev cog khoom qhuav qhuav xav txog tus nqi, nrog rau nruab nrab viscosity cellulose (75,000-100000) los hloov qis viscosity cellulose (20,000-40000) kom txo cov nqi ntawm cov viscosity. ntxiv.
Post lub sij hawm: Sep-14-2022