1, Dab tsi yog qhov tseem ceeb siv ntawm hydroxypropyl methyl cellulose (HPMC)?
HPMCYog siv dav hauv cov ntaub ntawv tsim tsev, cov khoom siv hluavtaws, cov tshuaj, khoom noj, ua liaj ua teb, tshuaj pleev ib ce, luam yeeb. HPMC tuaj yeem faib ua: Qib Kev Tsim Kho, Khoom Noj Qib thiab Qib Kawm Los Ntawm Kev Siv. Tam sim no, feem ntau ntawm cov qauv tsim kho hauv tsev, tso hmoov ntau ntau, txog 90% yog siv los ua cov hmoov xis thiab lo kua nplaum.
2, HydroxyPropyyl methyl cellulose (HPMC) tau muab faib ua ob peb, qhov txawv ntawm nws li cas?
HPMC tuaj yeem muab faib ua cov khoom daws kev daws teeb meem zoo, ploj hauv cov dej txias, vim tias HPMC tsuas yog dispersed hauv dej, Tsis muaj kev sib cav tiag. Txog 2 feeb, viscosity ntawm cov kua maj mam nce, kev sib sau pob tshab viscous colloid. Cov kub soluble cov khoom, hauv dej txias, tuaj yeem nrawm nrawm rau hauv dej kub, thaum kub txav maj mam tshwm, kom txog thaum tsim ntawm pob tshab viscous colloid. Cov tshuaj kub tsuas yog siv tau hauv cov hmoov ua kom muaj hmoov thiab tshuaj khib, hauv cov kua nplaum ua kua thiab pleev xim, yuav siv tau ib pab pawg tshwm sim, tsis tuaj yeem siv. Instant daws cov qauv daws teeb meem, ntau daim ntawv thov yog ob peb qhov dav, hauv kev ua kom huv thiab tshuaj khib thiab txheej, txhua tus tuaj yeem siv, tsis muaj dab tsi contraindication.
3, HydroxyPropyyl methyl cellulose (HPMC) cov qauv solubility muaj cov?
Cov Dej Dej Kub Ntxhu Cov Txheej Txheem: Vim HPMC tsis tau yaj nyob rau hauv dej kub, tom qab ntawd HPMC tawg thaum txias, ob txoj kev tau piav qhia raws li nram no:
1) Muab cov dej kub uas yuav tsum muaj dej kub rau hauv lub thawv thiab cua sov nws txog 70 ℃. Maj mam ntxiv hydroxypropylulose hauv qeeb stirring, thiab tom qab ntawd maj mam ua ib tug slurry, nyob rau hauv stirring txias slurry.
2), ntxiv qhov yuav tsum tau muaj ntawm 1/3 lossis 2/3 dej hauv lub ntim, thiab cua sov li 70 ℃, raws li lub txheej txheem ntawm 1), HPMC Dispersion, Kev npaj ua dej slurry; Tom qab ntawd ntxiv qhov seem ntawm cov dej txias rau lub qhov cub kub, do thiab txias qhov sib tov.
Hmoov sib xyaw txoj kev: HPMC hmoov thiab ntau ntawm lwm cov hmoov av, tab sis tsis muaj kev sib xyaw, vim tias txhua lub ces kaum me me, tsuas yog HPMC me ntsis , Dej yuav yaj sai. - Putty hmoov thiab tshuaj khib ntau yam lag luam yog siv hom no. HydroxyPropy cellulose (HPMC) yog siv los ua cov neeg sawv cev tuab thiab dej tshem tawm cov hmoov pov tseg.
4, Koj yooj yim npaum li cas los txiav txim siab qhov zoo ntawm hydroxypropyl methyl cellulose (HPMC)?
(1) whiteness: txawm hais tias whiteness tsis tuaj yeem txiav txim siab tias HPMC yooj yim siv, thiab yog tias nws tau ntxiv rau hauv cov kws kho hniav ntxuav tshuaj, yuav cuam tshuam nws zoo. Txawm li cas los xij, cov khoom lag luam zoo yog feem ntau dawb.
(2) Fineness: HPMC fineness feem ntau 80 mesh thiab 100 mesh, 120 lub hom phiaj tsawg dua 80 mesh, finer zoo kawg nkaus, feem ntau zoo dua.
(3) Kev Hloov Chaw): HydroxyPropy cellulose (HPMC) rau hauv dej, kom pom nws cov kev hloov pauv, kom zoo dua, qhov tsawg dua, tsawg heev insoluble cov khoom sab hauv. Lub permeability ntawm txoj kab ntsug feem ntau yog qhov zoo, tab sis tsis tuaj yeem qhia tau zoo dua li ntawm cov reactor ntau dua, cov khoom lag luam zoo yog txiav txim los ntawm ntau yam.
(4) Kev sib tsoo tshwj xeeb: qhov ntau dua qhov sib nqus, qhov hnyav dua qhov zoo dua. Tshaj li qhov tseem ceeb, feem ntau vim tias cov ntsiab lus ntawm hydroxypropyl yog qhov siab, hydroxypropropyl yog qhov siab, tom qab ntawd dej rov qab yog qhov zoo dua.
5, HydroxyPropyyl methyl cellulose (HPMC) nyob rau hauv tus nqi ntawm putty hmoov?
HPMC nyob rau hauv cov ntawv thov tiag tiag ntawm cov kev siv tshuaj, los ntawm huab cua ib puag ncig, ntsuas dej hauv zos, tso cov hmoov av hauv zos kom zoo, thiab "cov neeg siv khoom kom 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, feem ntau ntawm lawv yog 5 kg nyob rau lub caij ntuj sov thiab 4.5 kg hauv lub caij ntuj no. Yunnan qhov ntau yog me me, feem ntau 3 kg -4 kg thiab li ntawd.
6, HydroxyPropyyl methyl cellulose (HPMC) Ntau npaum li cas viscosity yog tsim nyog?
Yuav tsum dhuav nrog tus menyuam hmoov yog dav 100 txhiab ok, qhov yuav tsum tau ua hauv kev ua haujlwm yog qee qhov siab dua, xav tau 150 txhiab lub peev xwm siv. Ntxiv mus, lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC yog dej tuav, ua raws li thickening. Hauv cov hmoov putty, tsuav kav dej tuav dej yog qhov zoo, lub viscosity yog qhov qis dua, cov txheeb ze cov dej rov qab zoo dua, thaum lub viscosity yog ntau tshaj 100 txhiab, lub viscosity muaj cov nyhuv me me rau cov dej khaws cia.
7, HydroxyPropyyl methyl cellulose (HPMC) Dab tsi yog cov ntsuas ntsuas tseem ceeb?
Hydroxypropyl cov ntsiab lus thiab viscosity, feem ntau cov neeg siv tau txhawj xeeb nrog ob ntu no. Hydroxypropyl cov ntsiab lus yog qhov siab, dej khaws cia yog feem ntau zoo dua. Viscosity, dej tuav, tab sis tsis paub meej) kuj zoo dua, thiab viscosity, hauv cov cement cug zoo dua siv qee qhov.
8, HydroxyPropyyl methyl cellulose (HPMC) lub ntsiab raw khoom yog dab tsi?
HydroxyPropy cellulose (HPMC) Lub ntsiab nyoos: Refined oxide, aretse oxide, acid, isopropyl cawv thiab lwm yam.
9, HPMC nyob rau hauv daim ntawv thov putty hmoov, lub luag haujlwm tseem ceeb yog dab tsi, txawm hais tias siv tshuaj?
HPMC hauv cov hmoov ua kom muaj sia, thickening, dej tuav thiab tsim peb lub luag haujlwm. Thickening: cellulose tuaj yeem ua tuab ua kev raug tshem tawm, yog li txoj kev daws teeb meem kom tswj tau cov khaub ncaws hnav thiab nce tib lub luag haujlwm, anti ntws dai. Dej khaws cia: Ua kom muaj hmoov ntub dej qhuav ntxiv, ib qho kev sib tw ua kom huv si calcium cov tshuaj tiv thaiv nyob rau hauv kev ua dej. Kev tsim kho: Cellulose muaj cov nyhuv raj lubricating, tuaj yeem ua cov hmoov puty muaj kev tsim kho kom zoo. HPMC tsis koom nrog kev siv tshuaj lom neeg, tsuas yog ua lub luag haujlwm ntawm lub luag haujlwm. Putty hmoov ntxiv dej, ntawm phab ntsa, yog cov tshuaj lom neeg cov tshuaj tiv thaiv, vim tias muaj cov hmoov tshiab, thiab tom qab ntawd siv, nws tsis yog, vim tias tau tsim ib Cov khoom siv tshiab (calcium carbonate). Lub Cheebtsam tseem ceeb ntawm grey calcium hmoov yog: Ca (OHO thiab ib qho me me ntawm CaCo3 CA (OH) 2 ↓ + H2O Calcium tshauv hauv dej Thiab huab cua nyob rau hauv kev txiav txim ntawm CO2, kev tsim cov calcium carbonate, thiab tshuaj ntsuab calcium tshauv cov hmoov tshauv zoo dua, nws tus kheej tsis koom nrog txhua yam tshuaj tiv thaiv.
10, HPMC tsis-ionic cellulose ither, ces dab tsi tsis yog-ionic?
Nyob rau hauv cov lus hais dav dav, tsis muaj ib yam dab tsi uas tsis ionize hauv dej. Ionization yog txheej txheem uas ib qho electrolyte rau hauv kev ywj pheej tsiv mus los nyob rau hauv hom kuab tshwj xeeb, xws li dej lossis dej caw. Piv txwv li, sodium chloride (NACL), cov ntsev peb noj txhua hnub, yaj sab hauv sodium reions (cle) Hauv lwm lo lus, HPMC nyob rau hauv cov dej tsis cuam tshuam rau hauv kev them nyiaj ions, tab sis muaj li cov lwg me.
11, HydroxyPropyyl methylulose gel kub thiab dab tsi cuam tshuam nrog?
HPMC gel kub yog cuam tshuam nrog nws cov ntsiab lus methoxy, qis dua cov ntsiab lus methoxy ↓, lub siab dua cov pa taws kub ntau dua ↑.
12. Puas muaj kev sib raug zoo ntawm cov hmoov uas muaj zaub mov thiab HPMC?
Choty hmoov hmoov thiab qhov zoo ntawm cov calcium muaj kev sib raug zoo, thiab HPMC tsis muaj kev sib raug zoo dhau. Cov ntsiab lus tsawg dua ntawm calcium thiab cov feem ntawm Cao, Ca (Oh) 2 hauv calcium tshauv tsis tsim nyog, yuav ua rau hmoov poob. Yog tias nws muaj qee yam ua nrog HPMC, tom qab ntawd dej tuav HPMC tsis zoo, nws tseem yuav ua rau hmoov poob. Rau cov laj thawj tshwj xeeb, thov saib cov lus nug 9.
13, HydroxyPropyl methylculose dej txias soluble hom thiab kub soluble ntaus hauv cov txheej txheem ntau lawm, Dab tsi yog qhov sib txawv?
HPMC Cov dej txias soluble kho yog tom qab kev kho mob glyox tsis nrawm, tab sis tsis yog yaj, tab sis yaj, yog yaj. Cov cua sov-soluble hom tsis yog qhov chaw muag ntsia nrog glyoxal. Qhov ntim ntawm glyoxal yog loj, lub dispersion yog nrawm, tab sis cov viscosity yog qeeb, cov ntim me me, ntawm qhov tsis tooj.
14, HydroxyPropYyl Cellulose (HPMC) muaj qhov tsis hnov tsw ntawm dab tsi?
HPMC tsim los ntawm cov txheej txheem hnyav yog ua los ntawm toluene thiab isopropyl cawv raws li kuab tshuaj. Yog hais tias ntxuav tsis zoo heev, yuav muaj qee qhov chaw seem.
15, kev siv sib txawv, yuav ua li cas xaiv txoj cai hydroxyprropyl methyl cellulose (HPMC)?
Daim ntawv thov ntawm Putty Hmoov: Qhov yuav tsum tau qis dua, lub viscosity yog 100 txhiab, nws yog ok, qhov tseem ceeb yog kom dej zoo dua. Daim ntawv thov ntawm cug: qhov yuav tsum tau yog siab dua, qhov yuav tsum tau yog viscosity siab, 150 txhiab yuav tsum zoo dua. Daim ntawv thov ntawm cov kua nplaum: xav tau cov khoom lag luam tam sim ntawd, siab viscosity.
16, HydroxyPropyyl Metylcellulose dab tsi yog lub npe?
HydroxyPropy cellulose, Lus Askiv: Hydroxypropropyl Cov me me: HPMC lossis MHPC Alias: HydroxyPropyl Methylropy Cellulose; Cellulose hydroxypropyl methyl ether; Cellulose hydroxypropylophlropyr ether hypromellose, 2-hydroxyprropylsyl cellulose ether. Cellulose hydroxypropyl methylety ether ether.
17, HPMC nyob rau hauv daim ntawv thov putty hmoov, putty hmoov npuas yog vim li cas?
HPMC hauv cov hmoov ua kom muaj sia, thickening, dej tuav thiab tsim peb lub luag haujlwm. Tsis koom nrog yam tshuaj tiv thaiv. Qhov laj thawj rau lub npuas: 1, cov dej tso ntau dhau. 2, hauv qab yog tsis qhuav, nyob rau sab saum toj thiab txhuam ib txheej, kuj yooj yim rau npuas.
18. Putty hmoov cov mis rau phab ntsa sab hauv thiab sab nrauv?
Putty hmoov rau sab hauv phab ntsa: 800kg ntawm cov calcium hnyav thiab 150k ether ete, ntshiab ntsuab, citricry acid thiab polyacrylamide tuaj yeem txuas ntxiv)
Phab Ntsa Sab Nrauv Sib Sab Nraud: Maas 350kg Quartz Xuab zeb 500kg Cellulose Ethaws ether 3kg Wood Fiber 2kg
19. Dab tsi yog qhov sib txawv ntawm HPMC thiab MC?
MC yog methyl cellulose, kho paj rwb tom qab kev kho mob alkali, nrog cov methane chloride yog etherification tus neeg sawv cev, los ntawm kev tawm tsam los ua cellulose ether. Feem ntau, cov qib degree hloov tau yog 1.6 ~ 2.0, thiab lub solubility sib txawv nrog cov qib hloov pauv. Nws yog cov tsis-ionic cellulose ether.
(1) Cov dej tuav tseg ntawm methyl cellulose yog nyob ntawm nws tus nqi ntawm ntxiv, viscosity, particle zoo heev thiab ua kom ceev. Feem ntau ntxiv cov nyiaj loj, me me, viscosity, siab dej khaws cia tus nqi. Ntawm lawv, tus nqi ntxiv rau hauv dej khaws cia muaj qhov cuam tshuam loj tshaj plaws, cov viscosity thiab theem ntawm cov dej khaws cia tsis yog ib feem ntawm kev sib raug zoo. Qhov kev sib cais zuj zus feem ntau yog nyob ntawm qhov kev hloov kho deg degree thiab particle zoo kawg ntawm cellulose sau. Hauv cov cellulose saum toj no ether, methyl cellulose thiab hydroxypropyl methylropy Cellulose dej tus nqi qis dua.
(2) Methyl Cellulose tuaj yeem yaj nyob rau hauv dej txias, dej kub yaj yuav ntsib teeb meem, nws cov kua aqueous nyob rau hauv hom pH = 3 ~ 12 thaj tsam yog ruaj khov. Nws muaj qhov sib xyaw zoo nrog cov hmoov txhuv nplej siab, cov pos hniav guanidine thiab ntau surfactants. Gelation tshwm sim thaum qhov kub nce mus txog qhov gelation kub.
(3) Cov kev hloov pauv ntawm qhov kub yuav cuam tshuam rau cov dej tswj hwm ntawm methyl cellulose. Feem ntau, qhov ntsuas kub siab dua, qhov tsis zoo ntawm cov dej khaws cia. Yog tias lub tshuaj khib qhov kub tshaj 40 ℃, dej tuav tseg ntawm methyl cellulose yuav muaj kev phem heev, ua rau kev siv tshuaj khib.
(4) Methyl cellulose tau pom meej meej ntawm kev tsim kho thiab nplaum ntawm cug. Ntawm no, "Adhesion" yog hais txog lub zog nplaum tau hnov ntawm tus neeg ua haujlwm cov cuab yeej siv thiab phab ntsa substrate, uas yog, cov shear tiv thaiv ntawm lub cug. Cov cuab yeej nplaum yog qhov loj, lub shear kuj ntawm cug yog qhov loj, thiab lub zog tsim nyog los ntawm cov neeg ua haujlwm ntawm cov neeg ua haujlwm kuj loj, yog li kev siv tshuaj cug yog neeg pluag. Hauv cellulose ether khoom, lub methyl cellulose adhesion yog nyob rau theem nrab.
HPMC rau hydroxypropyl cellulose, yog ua los ntawm kev kho suab nrov tom qab kev tawm tsam, los ntawm cov tshuaj tiv thaiv kab mob, los ntawm cov kev tawm tsam ntawm cov tshuaj etha. Qhov hloov chaw hloov chaw yog feem ntau 1.2 ~ 2.0. Nws cov khoom tau cuam tshuam los ntawm kev faib ua feem ntawm mexoxy cov ntsiab lus thiab hydroxypropropyl cov ntsiab lus.
(1) HydroxyPropyyl methyl cellulose soluble hauv dej txias, dej kub yaj yuav ntsib teeb meem. Tab sis nws gelation kub hauv dej kub yog qhov siab dua li ntawm methyl cellulose. Lub solubility ntawm methyl cellulose hauv dej txias kuj tseem txhim kho.
(2) Lub viscosity ntawm hydroxypropyl cellulose muaj feem xyuam rau nws cov molecular hnyav, thiab qhov loj molecular hnyav yog qhov siab viscosity. Qhov kub yuav cuam tshuam nws cov viscosity, kub nce ntxiv, viscosity txo. Txawm li cas los xij, lub viscosity ntawm kev kub siab yog qis dua li methyl cellulose. Cov kev daws teeb meem yog ruaj khov thaum khaws cia ntawm chav tsev kub.
(3) Hydroxypropyl cellulose yog ruaj khov rau cov kua qaub thiab alkali, thiab nws cov kua aqueous yog qhov ruaj khov heev hauv cov ph = 2 ~ 12. Caustic dej qab zib thiab txiv qaub dej tsis muaj kev cuam tshuam zoo rau nws cov khoom, tab sis alkali tuaj yeem nrawm nws cov kev sib cais thiab txhim kho lub viscosity ntawm tus lej PIN. HydroxyPropy cellulose tau ruaj khov rau cov ntsev dav dav, tab sis thaum cov viscrot ntawm hydroxypropyl cellulose kev daws teeb meem.
(4) Cov dej ua kom muaj zog ntawm hydroxypropyl cellulose yog nyob ntawm tus nqi ntawm nws ntxiv, viscosity, tib tus nqi ntawm cov dej khaws cia yog siab dua li methyl cellulose.
(5) HydroxyPropyyl methyl cellulose tuaj yeem sib xyaw nrog dej-soluble polymer sib txuas los ua cov ris tsho zoo nkauj, muaj txiaj ntsig viscosity daws. Xws li kev haus dej cawv polyvinyl, cov hmoov txhuv nplej siab ether, cog cov pos hniav thiab rau.
(6) cov nplaum ntawm hydroxypropyl cellulose rau tshuaj kho kom zoo siab dua li methyl cellulose.
(7) Hydroxypropyl cellulose muaj cov enzymatic tsis kam ua rau nws txoj kev daws teeb meem yog qis dua ntawm methyl cellulose.
Dab tsi yuav tsum tau them nyiaj rau hauv cov ntaub ntawv thov ntawm kev sib raug zoo ntawm viscosity thiab qhov kub ntawm HPMC?
Lub viscos ntawm HPMC yog inversely proportional kom kub, uas yog hais, viscosity nce nrog qhov txo qis ntawm qhov kub. Thaum peb tham txog cov khoom viscosity ntawm cov khoom lag luam, peb txhais tau qhov tshwm sim ntawm kev ntsuas nws 2% kev daws teeb meem ntawm qhov kub ntawm 20 degrees Celsius.
Hauv cov ntaub ntawv thov siv, hauv thaj chaw nrog qhov sib txawv loj ntawm lub caij ntuj sov thiab lub caij ntuj no, saib xyuas kom siv cov viscosity qis hauv lub caij ntuj no, uas yog qhov ua kom muaj ntau dua rau kev tsim kho. Txwv tsis pub, thaum ntsuas kub yog tsawg, viscosity ntawm cellulose yuav nce ntxiv, thaum scraping, xav tias yuav hnyav.
Nruab nrab viscosity: 75000-100000 tsuas yog siv rau putty
Vim li cas: Cov Dej Zoo
High viscosity: 150000-200000 yog siv rau polystyrene boilles Kev Cug Cug Cug Cug Tshuaj Cug Tshuaj Khov thiab iav Boils Thermal rwb thaiv tsev.
Vim li cas: siab viscosity, tshuaj khib tsis yooj yim kom poob, ntws dai, txhim kho kev tsim kho.
Tab sis feem ntau hais lus, qhov siab dua cov khoom siv celluls (75,00000000-000) los hloov viscosity cellivais (20,000-40000) los txo tus nqi ntawm Txuas ntxiv.
Lub Sijhawm Post: Sep-14-2022