1, qhov tseem ceeb ntawm kev siv hydroxypropyl methyl cellulose (HPMC) yog dab tsi?
HPMCSiv dav hauv cov ntaub ntawv tsim kho, tshuaj pleev xim, cov khoom siv ua los ntawm cov khoom siv av nplaum, cov khoom siv av nplaum, tshuaj, khoom noj, textile, kev ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. HPMC muaj peev xwm muab faib ua: qib kev tsim kho, qib zaub mov thiab qib kev kho mob los ntawm kev siv. Tam sim no, feem ntau ntawm qib kev tsim kho hauv tsev, hauv qib kev tsim kho, cov hmoov putty ntau heev, kwv yees li 90% yog siv los ua hmoov putty, tus so yog siv los ua cov cement mortar thiab kua nplaum.
2, hydroxypropyl methyl cellulose (HPMC) yog muab faib ua ntau yam, qhov txawv ntawm nws siv yog dab tsi?
HPMC muaj peev xwm muab faib ua cov tshuaj tam sim ntawd thiab cov tshuaj kub, cov khoom lag luam tam sim ntawd, sai sai tawg hauv dej txias, ploj mus rau hauv dej, lub sijhawm no cov kua tsis muaj viscosity, vim HPMC tsuas yog tawg hauv dej, tsis muaj kev yaj tiag tiag. Kwv yees li 2 feeb, qhov viscosity ntawm cov kua maj mam nce, tsim cov colloid viscous pob tshab. Cov khoom kub yaj, hauv dej txias, tuaj yeem tawg sai sai hauv dej kub, ploj mus rau hauv dej kub, thaum qhov kub poob rau qee qhov kub, viscosity maj mam tshwm sim, kom txog thaum tsim cov colloid viscous pob tshab. Cov tshuaj kub tsuas yog siv tau rau hauv hmoov putty thiab mortar, hauv cov kua nplaum thiab xim, yuav muaj ib pawg tshwm sim, tsis tuaj yeem siv. Tus qauv tshuaj tam sim ntawd, ntau yam kev siv yog ob peb dav dua, hauv kev raug dhuav nrog cov menyuam yaus hmoov thiab mortar, thiab hauv cov kua nplaum thiab txheej, txhua tus tuaj yeem siv, yam tsis muaj kev txwv dab tsi.
3, hydroxypropyl methyl cellulose (HPMC) solubility txoj kev muaj cov ntawd?
Txoj kev yaj dej kub: Vim tias HPMC tsis yaj rau hauv dej kub, yog li HPMC thaum ntxov tuaj yeem yaj sib npaug hauv dej kub, tom qab ntawd yaj sai sai thaum txias, ob txoj kev ib txwm muaj raws li hauv qab no:
1) Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom sov txog li 70 ℃. Maj mam ntxiv hydroxypropyl methylcellulose rau hauv qab qeeb qeeb, HPMC pib ntab rau saum npoo dej, thiab tom qab ntawd maj mam ua cov slurry, thiab tom qab ntawd ua kom cov slurry txias.
2), ntxiv cov dej uas xav tau ntawm 1/3 lossis 2/3 rau hauv lub thawv, thiab cua sov rau 70 ℃, raws li txoj kev ntawm 1), HPMC dispersion, npaj cov dej kub slurry; Tom qab ntawd ntxiv cov dej txias seem rau hauv cov dej kub slurry, do thiab txias cov khoom sib tov.
Txoj kev sib tov hmoov: HPMC hmoov thiab ntau lwm yam khoom xyaw hmoov, sib tov kom huv si nrog lub tshuab sib tov, tom qab ntxiv dej kom yaj, ces HPMC tuaj yeem yaj lub sijhawm no, tab sis tsis yog kev sib koom ua ke, vim tias txhua lub ces kaum me me, tsuas yog me ntsis HPMC hmoov, dej yuav yaj tam sim ntawd. - Cov tuam txhab tsim hmoov putty thiab cov tshuaj khib siv txoj kev no. Hydroxypropyl methyl cellulose (HPMC) yog siv los ua tus neeg sawv cev tuab thiab tus neeg sawv cev khaws dej hauv cov tshuaj khib hmoov putty.
4, yooj yim thiab intuitive npaum li cas los txiav txim siab qhov zoo ntawm hydroxypropyl methyl cellulose (HPMC)?
(1) qhov dawb: txawm hais tias qhov dawb tsis tuaj yeem txiav txim siab seb HPMC puas yooj yim siv, thiab yog tias nws raug ntxiv rau hauv cov txheej txheem tsim cov tshuaj dawb, nws yuav cuam tshuam rau nws qhov zoo. Txawm li cas los xij, cov khoom zoo feem ntau yog dawb.
(2) qhov zoo: HPMC qhov zoo feem ntau yog 80 mesh thiab 100 mesh, tsawg dua 120 lub hom phiaj, Hebei HPMC feem ntau yog 80 mesh, qhov zoo dua qhov zoo, feem ntau zoo dua.
(3) kev xa mus: cov hydroxypropyl methyl cellulose (HPMC) mus rau hauv dej, tsim cov pob tshab colloid, saib nws cov kev xa mus, qhov ntau dua qhov kev xa mus, qhov zoo dua, cov khoom tsis yaj hauv. Lub permeability ntawm lub reactor ntsug feem ntau zoo, lub reactor kab rov tav yog qhov phem dua, tab sis tsis tuaj yeem qhia tias qhov zoo ntawm lub reactor ntsug ntau lawm zoo dua li ntawm lub reactor kab rov tav ntau lawm, cov khoom zoo yog txiav txim siab los ntawm ntau yam.
(4) qhov hnyav tshwj xeeb: qhov hnyav tshwj xeeb ntau dua, qhov hnyav dua qhov zoo dua. Ntau dua li qhov tseem ceeb, feem ntau vim tias cov ntsiab lus ntawm hydroxypropyl siab, cov ntsiab lus hydroxypropyl siab, ces cov dej khaws cia zoo dua.
5, hydroxypropyl methyl cellulose (HPMC) nyob rau hauv qhov ntau ntawm cov hmoov putty?
HPMC hauv kev siv cov tshuaj ntau npaum li cas, raws li huab cua ib puag ncig, kub, qhov zoo ntawm cov tshauv calcium hauv zos, cov mis hmoov putty thiab "cov neeg siv khoom xav tau zoo", thiab muaj qhov sib txawv. Feem ntau hais lus, 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 thaum lub caij ntuj sov thiab 4.5 kg thaum lub caij ntuj no. Yunnan qhov ntau yog me me, feem ntau 3 kg -4 kg thiab lwm yam.
6, hydroxypropyl methyl cellulose (HPMC) viscosity ntau npaum li cas yog qhov tsim nyog?
UA KOM TXIV NEEJ TSIS TXHOB NROG HMOOV MENYUAM YOG GENERAL 100 TXHIAB OK, QHOV YUAV TSUM MUAJ HAUV MORTAR YOG QEEV SIAB, XAV TAU 150 TXHIAB PEEM SIV. Ntxiv mus, lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC yog kev khaws dej, ua raws li kev tuab. Hauv hmoov putty, tsuav yog qhov khaws dej zoo, qhov viscosity qis (7-80 txhiab), nws kuj ua tau, ntawm chav kawm, qhov viscosity loj dua, qhov khaws dej zoo dua, thaum qhov viscosity ntau dua 100 txhiab, qhov viscosity muaj qhov cuam tshuam me ntsis rau qhov khaws dej.
7, hydroxypropyl methyl cellulose (HPMC) cov cim qhia tseem ceeb yog dab tsi?
Cov ntsiab lus Hydroxypropyl thiab viscosity, feem ntau cov neeg siv txhawj xeeb txog ob qho ntsuas 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, hauv cov cement mortar zoo dua siv qee qhov.
8, hydroxypropyl methyl cellulose (HPMC) cov khoom siv tseem ceeb yog dab tsi?
Hydroxypropyl methyl cellulose (HPMC) cov ntaub ntawv tseem ceeb: paj rwb zoo, chloromethane, propylene oxide, lwm yam ntaub ntawv raw, ntsiav tshuaj alkali, acid, toluene, isopropyl cawv thiab lwm yam.
9, HPMC nyob rau hauv daim ntawv thov ntawm putty hmoov, lub luag haujlwm tseem ceeb yog dab tsi, seb chemistry?
HPMC hauv cov hmoov putty, ua kom tuab, khaws dej thiab tsim peb lub luag haujlwm. Thickening: Cellulose tuaj yeem ua kom tuab ua lub luag haujlwm, yog li cov tshuaj kom tswj tau tib lub luag haujlwm nce thiab nqis, tiv thaiv kev ntws dai. Kev khaws dej: ua rau cov hmoov putty qhuav qeeb dua, cov tshauv calcium pab cuam tshuam nyob rau hauv qhov kev ua ntawm dej. Kev tsim kho: Cellulose muaj cov nyhuv lubricating, tuaj yeem ua rau cov hmoov putty muaj kev tsim kho zoo. HPMC tsis koom nrog kev tshuaj lom neeg, tsuas yog ua lub luag haujlwm pab. Cov hmoov putty ntxiv dej, ntawm phab ntsa, yog kev tshuaj lom neeg, vim tias muaj kev tsim cov khoom tshiab, cov hmoov putty ntawm phab ntsa nqes los ntawm phab ntsa, zom ua hmoov, thiab tom qab ntawd siv, nws tsis yog lawm, vim tias tau tsim cov khoom 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 calcium tshauv hauv dej thiab huab cua nyob rau hauv qhov kev ua ntawm CO2, kev tsim cov calcium carbonate, thiab HPMC tsuas yog khaws dej, cov tshuaj calcium tshauv pab zoo dua, nws tus kheej tsis koom nrog hauv kev tshuaj tiv thaiv.
10, HPMC non-ionic cellulose ether, ces non-ionic yog dab tsi?
Feem ntau, cov nonionic yog ib yam dab tsi uas tsis ionize hauv dej. Ionization yog cov txheej txheem uas cov electrolyte raug dissociated mus rau hauv cov ions them nqi uas txav tau yooj yim hauv cov kuab tshuaj tshwj xeeb, xws li dej lossis cawv. Piv txwv li, sodium chloride (NaCl), cov ntsev uas peb noj txhua hnub, yaj hauv dej thiab ionizes los tsim cov sodium ions (Na +) uas txav tau yooj yim uas muaj nqi zoo thiab chloride ions (Cl) uas muaj nqi tsis zoo. Hauv lwm lo lus, HPMC hauv dej tsis dissociate mus rau hauv cov ions them, tab sis muaj nyob ua cov molecules.
11, hydroxypropyl methylcellulose gel kub thiab dab tsi muaj feem xyuam rau?
Qhov kub ntawm HPMC gel muaj feem cuam tshuam nrog nws cov ntsiab lus methoxy, qhov qis dua cov ntsiab lus methoxy ↓, qhov siab dua qhov kub ntawm gel ↑.
12. Puas muaj kev sib raug zoo ntawm hmoov putty thiab HPMC?
Hmoov putty hmoov thiab qhov zoo ntawm calcium muaj kev sib raug zoo heev, thiab HPMC tsis muaj kev sib raug zoo ntau dhau. Cov calcium tsawg hauv calcium thiab qhov sib piv 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 khaws cia ntawm HPMC tsis zoo, nws tseem yuav ua rau hmoov poob. Rau cov laj thawj tshwj xeeb, thov saib lo lus nug 9.
13, hydroxypropyl methylcellulose hom dej txias soluble thiab hom kub soluble hauv cov txheej txheem ntau lawm, qhov txawv yog dab tsi?
HPMC hom uas yaj tau hauv dej txias yog tom qab kho qhov chaw glyoxal, hauv dej txias sai sai dispersed, tab sis tsis yaj tiag tiag, viscosity nce, yog yaj. Hom uas yaj tau hauv cua sov tsis tau kho qhov chaw nrog glyoxal. Lub ntim ntawm glyoxal yog loj, qhov dispersion yog ceev, tab sis viscosity qeeb, lub ntim yog me me, ntawm qhov tsis sib xws.
14, hydroxypropyl methyl cellulose (HPMC) muaj ntxhiab tsw ntawm dab tsi tshwm sim?
HPMC tsim los ntawm txoj kev yaj yog ua los ntawm toluene thiab isopropyl cawv ua cov kuab tshuaj. Yog tias ntxuav tsis zoo heev, yuav muaj qee qhov saj seem.
15, kev siv sib txawv, yuav ua li cas xaiv qhov hydroxypropyl methyl cellulose (HPMC) zoo?
DAIM NTAWV THOV NTAWM putty hmoov: qhov yuav tsum tau qis dua, qhov viscosity yog 100 txhiab, nws yog OK, qhov tseem ceeb yog kom dej zoo dua. Daim ntawv thov ntawm mortar: qhov yuav tsum tau siab dua, qhov yuav tsum tau yog viscosity siab, 150 txhiab yuav tsum zoo dua. Daim ntawv thov ntawm kua nplaum: xav tau cov khoom lag luam tam sim ntawd, viscosity siab.
16, hydroxypropyl methylcellulose lub npe cuav yog dab tsi?
Hydroxypropyl Methyl Cellulose, Lus Askiv: Hydroxypropyl Methyl Cellulose luv: HPMC lossis 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 dab tsi yog vim li cas?
HPMC hauv cov hmoov putty, thickening, dej khaws cia thiab kev tsim kho ntawm peb lub luag haujlwm. Tsis koom nrog hauv kev ua tshuaj tiv thaiv. Qhov laj thawj rau cov npuas: 1, dej muab ntau dhau. 2, hauv qab tsis qhuav, rau sab saum toj thiab khawb ib txheej, kuj yooj yim npuas.
18. Cov mis hmoov putty rau phab ntsa sab hauv thiab sab nraud?
Hmoov putty rau sab hauv phab ntsa: 800KG ntawm cov calcium hnyav thiab 150KG ntawm cov calcium grey (starch ether, ntsuab ntshiab, av peng, citric acid thiab polyacrylamide tuaj yeem ntxiv kom haum)
Phab ntsa sab nraud putty hmoov: cement 350KG hnyav calcium 500KG quartz xuab zeb 150KG latex hmoov 8-12kg cellulose ether 3KG hmoov txhuv nplej siab ether 0.5kg ntoo fiber 2KG
19. Qhov txawv ntawm HPMC thiab MC yog dab tsi?
MC yog methyl cellulose, paj rwb ua kom zoo tom qab kho alkali, nrog methane chloride ua tus neeg sawv cev etherification, los ntawm ntau qhov kev tshuaj tiv thaiv los ua cellulose ether. Feem ntau, qib ntawm kev hloov pauv yog 1.6 ~ 2.0, thiab solubility sib txawv nrog qib ntawm kev hloov pauv. Nws yog cellulose ether tsis-ionic.
(1) Qhov khaws dej ntawm methyl cellulose nyob ntawm nws qhov ntau ntxiv, viscosity, particle fineness thiab dissolving speed. Feem ntau ntxiv ntau, me me fineness, viscosity, thiab dej retention rate siab. Ntawm lawv, qhov ntau ntxiv rau qhov khaws dej muaj qhov cuam tshuam loj tshaj plaws, viscosity thiab qib ntawm dej retention rate tsis sib npaug rau kev sib raug zoo. Qhov dissolving rate feem ntau nyob ntawm qhov hloov pauv ntawm qhov chaw thiab particle fineness ntawm cellulose particles. Hauv cov cellulose ether saum toj no, methyl cellulose thiab hydroxypropyl methyl cellulose dej retention rate siab dua.
(2) Methyl cellulose tuaj yeem yaj rau hauv dej txias, thiab dej kub yaj yuav ntsib teeb meem, nws cov kua dej hauv pH = 3 ~ 12 ruaj khov heev. 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, cuam tshuam loj heev rau kev tsim cov mortar.
(4) Methyl cellulose muaj feem cuam tshuam rau kev tsim kho thiab kev nplaum ntawm cov mortar. Ntawm no, "kev nplaum" txhais tau hais tias lub zog nplaum uas hnov ntawm cov cuab yeej siv ntawm tus neeg ua haujlwm thiab cov phab ntsa substrate, uas yog, qhov kev tiv thaiv shear ntawm cov mortar. Cov khoom nplaum yog loj, qhov kev tiv thaiv shear ntawm cov mortar yog loj, thiab lub zog uas cov neeg ua haujlwm xav tau hauv cov txheej txheem ntawm kev siv kuj loj, yog li cov khoom siv tsim kho ntawm cov mortar tsis zoo. Hauv cov khoom cellulose ether, qhov kev nplaum methyl cellulose yog nyob rau theem nruab nrab.
HPMC rau hydroxypropyl methyl cellulose, yog ua los ntawm paj rwb zoo tom qab kev kho alkalization, 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 hloov pauv feem ntau yog 1.2 ~ 2.0. Nws cov khoom raug cuam tshuam los ntawm qhov sib piv ntawm methoxy cov ntsiab lus thiab hydroxypropyl cov ntsiab lus.
(1) hydroxypropyl methyl cellulose yaj tau hauv dej txias, dej kub yaj yuav ntsib teeb meem. Tab sis nws qhov kub gelation hauv dej kub siab dua li ntawm methyl cellulose. Qhov solubility ntawm methyl cellulose hauv dej txias kuj zoo dua heev.
(2) qhov viscosity ntawm hydroxypropyl methyl cellulose muaj feem xyuam rau nws qhov hnyav molecular, thiab qhov hnyav molecular loj yog qhov viscosity siab. Kub kuj tseem yuav cuam tshuam rau nws qhov viscosity, kub nce, viscosity txo qis. Txawm li cas los xij, qhov viscosity ntawm qhov kub siab qis dua li ntawm methyl cellulose. Cov tshuaj ruaj khov thaum khaws cia ntawm chav tsev kub.
(3) hydroxypropyl methyl cellulose ruaj khov rau cov kua qaub thiab alkali, thiab nws cov kua dej ruaj khov heev hauv pH = 2 ~ 12. Caustic soda thiab dej txiv qaub tsis muaj qhov cuam tshuam loj rau nws cov khoom, tab sis alkali tuaj yeem ua kom nws cov nqi yaj sai dua thiab txhim kho qhov viscosity ntawm tus pin. Hydroxypropyl methyl cellulose muaj kev 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 qhov ntau ntawm nws cov ntxiv, viscosity, thiab lwm yam., tib tus nqi khaws cia dej siab dua li methyl cellulose.
(5) hydroxypropyl methyl cellulose tuaj yeem sib xyaw nrog cov polymer sib xyaw uas yaj tau hauv dej kom ua tau cov kua nplaum zoo sib xws, viscosity siab dua. Xws li polyvinyl cawv, hmoov txhuv nplej siab ether, cov pos hniav cog 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 enzymatic zoo dua li methyl cellulose, thiab qhov ua tau ntawm enzymatic degradation ntawm nws cov tshuaj yog qis dua li ntawm methyl cellulose.
Yuav tsum tau them sai sai rau dab tsi hauv kev siv tiag tiag ntawm kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC?
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 txhais tau tias qhov tshwm sim ntawm kev ntsuas nws 2% aqueous kua ntawm qhov kub ntawm 20 degrees Celsius.
Hauv kev siv tiag tiag, nyob rau thaj chaw uas muaj qhov sib txawv ntawm qhov kub thiab txias ntawm lub caij ntuj sov thiab lub caij ntuj no, yuav tsum tau them sai sai rau cov lus pom zoo kom siv cov viscosity qis dua thaum lub caij ntuj no, uas zoo dua rau kev tsim kho. Txwv tsis pub, thaum qhov kub qis, qhov viscosity ntawm cellulose yuav nce ntxiv, thaum khawb, yuav hnyav.
Nruab nrab viscosity: 75000-100000 feem ntau yog siv rau putty
Vim li cas: kev khaws dej zoo
Cov viscosity siab: 150000-200000 feem ntau yog siv rau cov polystyrene particles thermal insulation mortar hmoov thiab iav hlaws dai thermal insulation 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 kev khaws cia dej yuav yog, yog li ntau lub Hoobkas qhuav mortar xav txog tus nqi, nrog rau nruab nrab viscosity cellulose (75,000-100000) los hloov qis viscosity cellulose (20,000-40000) los txo qhov ntau ntxiv.
Lub sijhawm tshaj tawm: Cuaj hlis-14-2022