Kev daws teeb meem HPMC

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

Lus teb:HPMCyog siv dav hauv cov ntaub ntawv tsim kho, tshuaj pleev xim, cov khoom siv hluavtaws, 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 tuaj yeem muab faib ua: qib kev tsim kho, qib zaub mov thiab qib kev kho mob raws li kev siv. Tam sim no ua hauv tsev feem ntau yog qib kev tsim kho, hauv qib kev tsim kho, qhov ntau ntawm cov hmoov putty yog loj 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 hom, qhov txawv ntawm nws siv yog dab tsi?

Lus Teb: HPMC muaj peev xwm muab faib ua cov khoom siv tam sim ntawd thiab cov khoom siv kub yaj, cov khoom siv tam sim ntawd, hauv dej txias sai sai yaj, ploj mus rau hauv dej, lub sijhawm no cov kua tsis muaj viscosity, vim HPMC tsuas yog yaj 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 siv kub yaj, hauv dej txias agglomeration, tuaj yeem nyob hauv dej kub, sai sai yaj, ploj mus rau hauv dej kub, kom txog thaum qhov kub poob rau qee qhov kub, viscosity maj mam tshwm sim, kom txog thaum tsim cov colloid viscous pob tshab. Hom kub yaj tsuas yog siv tau hauv hmoov putty thiab mortar, hauv kua nplaum thiab txheej, tuaj yeem tshwm sim agglomeration, tsis tuaj yeem siv. Instant yaj qauv, daim ntawv thov yog ob peb dav dua, hauv yuav dhuav nrog cov menyuam hmoov thiab mortar, thiab hauv kua nplaum thiab txheej, txhua yam tuaj yeem siv, tsis muaj dab tsi taboo.

3, hydroxypropyl methyl cellulose (HPMC) txoj kev yaj muaj cov ntawd?

- lus teb: 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, thiab tom qab ntawd yaj sai sai thaum txias, ob txoj kev ib txwm muaj piav qhia raws li hauv qab no:

1) Sau lub thawv nrog dej kub ntau npaum li koj xav tau thiab ua kom sov txog li 70 ℃. Hydroxypropyl methyl cellulose maj mam ntxiv rau hauv qab qeeb qeeb, thiab HPMC ntab rau ntawm qhov chaw ntawm dej, thiab tom qab ntawd maj mam tsim cov slurry, uas txias hauv qab do.

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

Txoj kev sib tov hmoov: HPMC hmoov thiab ntau lwm yam khoom xyaw hmoov, sib tov tag nrho nrog lub tshuab sib tov, tom qab ntawd ntxiv dej kom yaj, lub sijhawm no HPMC tuaj yeem yaj, thiab tsis agglomerate, vim tias txhua lub ces kaum me me, tsuas yog me ntsis HPMC hmoov, dej yuav yaj tam sim ntawd. - Cov chaw tsim khoom hmoov putty thiab mortar siv txoj kev no. [Hydroxypropyl methyl cellulose (HPMC) siv ua tus neeg sawv cev tuab thiab tus neeg sawv cev khaws dej hauv putty hmoov mortar.

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

Lus Teb: (1) dawb: txawm hais tias dawb 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, feem ntau cov khoom zoo muaj qhov dawb zoo. (2) fineness: HPMC fineness feem ntau yog 80 mesh thiab 100 mesh, 120 lub hom phiaj tsawg dua, Hebei HPMC feem ntau yog 80 mesh, qhov finer qhov fineness, feem ntau hais lus, qhov zoo dua. (3) transmittance: hydroxypropyl methyl cellulose (HPMC) rau hauv dej, tsim cov colloid pob tshab, saib nws qhov transmittance, qhov loj dua qhov transmittance yog qhov zoo dua, cov khoom tsis yaj hauv tsawg dua. Qhov transmittance ntawm ntsug reactor feem ntau zoo, thiab ntawm kab rov tav reactor yog qhov phem dua, tab sis nws tsis txhais tau tias qhov zoo ntawm kev tsim khoom ntawm ntsug reactor zoo dua li ntawm kab rov tav reactor. Muaj ntau yam los txiav txim siab qhov zoo ntawm cov khoom. (4) Proportion: qhov loj dua qhov sib piv, qhov hnyav dua qhov zoo dua. Tshaj li qhov tseem ceeb, vim tias sab hauv cov hydroxyl propyl base cov ntsiab lus siab feem ntau, hydroxyl propyl base cov ntsiab lus siab, tiv thaiv dej kom xav tau zoo dua.

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

- lus teb: dhuav nrog cov hmoov menyuam yaus yog qhov zoo feem ntau 100 txhiab, qee qhov siab dua ntawm qhov xav tau hauv mortar, xav tau 150 txhiab lub peev xwm siv. Ntxiv mus, HPMC yog lub luag haujlwm tseem ceeb tshaj plaws ntawm kev khaws dej, ua raws li thickening. Hauv cov hmoov putty, tsuav yog cov dej khaws cia zoo, qhov viscosity qis (7-80 txhiab), nws kuj ua tau, ntawm chav kawm, qhov viscosity loj dua, qhov dej khaws cia zoo dua, thaum qhov viscosity ntau dua 100 txhiab, qhov viscosity ntawm kev khaws dej tsis ntau.

6, hydroxypropyl methyl cellulose (HPMC) cov cim qhia tseem ceeb 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.

7, hydroxypropyl methyl cellulose (HPMC) cov ntaub ntawv raw tseem ceeb yog dab tsi?

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

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

Teb: HPMC hauv cov hmoov putty, 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 cov hmoov putty qhuav qeeb qeeb, pabcuam grey calcium hauv kev ua haujlwm ntawm dej tshuaj tiv thaiv. Kev tsim kho: cellulose lubrication, tuaj yeem ua rau cov hmoov putty muaj kev tsim kho zoo. HPMC tsis koom nrog hauv kev tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm txhawb nqa. Putty hmoov thiab dej, ntawm phab ntsa, yog kev tshuaj tiv thaiv, vim yog lub cim ntawm cov tshuaj tshiab, phab ntsa ntawm cov hmoov putty nqes los ntawm phab ntsa, zom ua hmoov, thiab tom qab ntawd siv, tsis zoo, vim tias tau tsim cov tshuaj tshiab (calcium carbonate). Cov khoom xyaw tseem ceeb ntawm cov hmoov calcium grey yog qhov sib xyaw ntawm Ca (OH) 2, CaO thiab me me ntawm CaCO3, CaO + H2O = Ca (OH) 2 - Ca (OH) 2 + CO2 = CaCO3↓ + H2O Cov calcium grey hauv dej thiab huab cua nyob rau hauv qhov kev ua ntawm CO2, calcium carbonate, thiab HPMC tsuas yog dej, pab cov calcium grey zoo dua, nws tus kheej tsis koom nrog hauv kev tshuaj tiv thaiv.

9.HPMC non-ionic cellulose ether, yog li ntawd 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.

10. Dab tsi muaj feem cuam tshuam rau qhov kub ntawm hydroxypropyl methyl cellulose?

- Teb: Qhov kub ntawm gelHPMCmuaj feem cuam tshuam nrog cov ntsiab lus methoxyl, qhov qis dua cov ntsiab lus methoxyl ↓, qhov siab dua qhov kub ntawm gel.

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

Lus Teb: feem ntau cov hmoov putty poob hmoov thiab cov tshauv calcium zoo muaj kev sib raug zoo heev, thiab HPMC tsis muaj kev sib raug zoo loj heev. Cov calcium qis hauv grey calcium thiab qhov sib piv tsis raug ntawm CaO thiab Ca (OH) 2 hauv grey calcium yuav ua rau cov hmoov poob. Yog tias muaj kev sib raug zoo me ntsis nrog HPMC, ces HPMC dej khaws cia tsis zoo, kuj yuav ua rau cov hmoov poob.

12, hydroxypropyl methyl cellulose dej txias soluble thiab kub soluble hauv cov txheej txheem ntau lawm ntawm qhov txawv 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.

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

– 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.

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

– lus teb: dhuav nrog daim ntawv thov ntawm cov hmoov menyuam yaus: qhov yuav tsum tau qis dua, viscosity 100 txhiab, 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, 150 txhiab kom zoo dua. Daim ntawv thov kua nplaum: qhov xav tau cov khoom lag luam tam sim ntawd, viscosity siab.

15. Lub npe cuav ntawm hydroxypropyl methyl cellulose yog dab tsi?

– LUS TEB: Hydroxypropyl Methyl Cellulose, luv ua HPMC lossis MHPC, lossis 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 dab tsi yog vim li cas?

Lus Teb: HPMC nyob rau hauv putty hmoov, 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.

17. 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 rau hydroxypropyl methyl cellulose, yog ua los ntawm paj rwb tom qab kev 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.

18. Yuav tsum tau them sai sai rau dab tsi hauv kev siv tswv yim ntawm kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC?

Teb: Qhov viscosity ntawmHPMCyog inversely proportional rau qhov kub thiab txias, uas yog hais tias, qhov viscosity nce nrog rau 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: 150000-200000 feem ntau yog siv rau polystyrene particle rwb thaiv tsev mortar roj hmab hmoov 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 cellulose viscosity nruab nrab (75000-100000) los hloov cov cellulose viscosity nruab nrab thiab qis (20000-40000) los txo qhov ntxiv.