HPMC daws

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

Teb: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 Qib, Qib Khoom Qib thiab Qib Kawm Qib Kawm Raws Li Kev Siv. Nyob rau ntawm tam sim no hauv tsev yog feem ntau cov qib kev tsim kho, tus nqi ntawm cov hmoov uas muaj zaub mov zoo heev, txog 90% yog siv los ua centa cug thiab kua nplaum.

2, HydroxyPropyyl methyl cellulose (HPMC) tau muab faib ua ntau hom, dab tsi yog qhov txawv ntawm nws siv?

Teb: HPMC tuaj yeem faib ua tam sim ntawd thiab tshav kub, nyob rau hauv dej txias sai sai, nyob rau hauv dej txias sai sai, nyob rau hauv dej txias sai sai, ploj mus rau hauv dej txias, vim HPMC tsuas yog dispersed hauv dej, tsis muaj kev sib cais tiag tiag. Kwv yees li 2 feeb, lub viscosity ntawm cov kua maj mam nce, kev sib sau pob tshab viscous colloid. Cov cua sov cov khoom, hauv dej txias agglomeration, tuaj yeem nyob hauv dej kub, kom txog rau thaum kub txav maj mam tshwm sim, kom txog rau thaum tsim ntawm pob tshab viscous colloid. Kev kub ceev hom tsuas yog siv tau hauv cov hmoov putty thiab tshuaj khib, hauv kua nplaum thiab txheej, tuaj yeem tshwm sim agglomerer, tsis tuaj yeem siv. Cov Qauv Tam Sim No, daim ntawv thov tau yog qee qhov dav, hauv kev khib nyiab, hauv cov kua nplaum thiab cov kua nplaum, txhua tus tuaj yeem siv, tsis muaj dab tsi tabo.

3, HydroxyPropyyl methyl cellulose (HPMC) cov kev muaj cov ntawd?

- Teb: Dej kub xaus txoj kev: Vim tias HPMC tsis yaj nyob rau hauv dej kub, thiab tom qab ntawd HPMC tau sai sai thaum txias, ob txoj kev tau piav qhia raws li nram no:

1) Sau lub khob nrog dej kub ntau li koj xav tau thiab ua kom sov li 70 ℃. Hydroxypropy cellulose yog maj mam ntxiv nyob rau hauv qeeb tawg, thiab tom qab ntawd maj mam ua ib tug slurry, uas yog txias nyob rau hauv nplawm.

2) Ntxiv rau 1/3 lossis 2/3 ntawm qhov yuav tsum tau dej rau hauv lub thawv thiab cua sov nws txog 70 ℃. Disperserse 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 nplawm.

Hmoov sib xyaw txoj kev: HPMC hmoov thiab ntau ntawm lwm cov hmoov av, vim tias txhua lub kaum plaub, tsuas yog HPMC hmoov, tsuas yog HPMC hmoov, dej yuav yaj sai. - Puas hmoov thiab tshuaj cug tuam txhab siv cov qauv no. [Hydroxypropyl cellulose (HPMC) siv raws li cov neeg sawv cev tuab thiab dej tshuaj khaws cia tshuaj khib.

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 saib HPMC zoo, thiab yog tias nws tau ntxiv rau cov txheej txheem ntau lawm, yuav cuam tshuam nws cov kev zoo. Txawm li cas los xij, cov khoom lag luam zoo tshaj muaj zoo dawb. (2) fineness :HPMC fineness is generally 80 mesh and 100 mesh,120 purpose less, Hebei HPMC mostly 80 mesh, the finer the fineness, generally speaking, the better. (3) Kev Hloov Chaw): HydroxyPropy cellulose (HPMC) rau hauv dej, pom nws cov kev hloov pauv, qhov kev hloov pauv tau zoo dua yog qhov zoo dua qub, cov khoom hauv insoluble hauv tsawg dua. Cov kev sib txuas ntawm cov tshuaj ntsug feem ntau yog qhov zoo, thiab nws tsis txhais tau tias yog qhov ua tau zoo heev, tab sis nws tsis txhais tau tias qhov zoo ntawm cov reactor zoo dua li ntawm kab rov tav reactor. Muaj ntau ntau yam los txiav txim qhov zoo ntawm cov khoom. (4) faib faib ua feem: qhov loj dua feem ntau, qhov hnyav dua qhov zoo dua. Tshaj li cov loj, vim tias hauv cov ntsiab lus hydroxyl proplin muaj ntau, hydroxyl protect cov ntsiab lus yog qhov siab, tiv thaiv dej kom xav tau zoo dua.

5, HydroxyPropyyl methyl cellulose (HPMC) Viscosity yog qhov tsim nyog dua?

- Teb: Yuav tsum dhuav nrog tus menyuam hmoov yog ok 100 txhiab, ib co siab dua ntawm cov kev xav tau hauv kev muab tshuaj khib, xav tau 150 txhiab lub peev xwm siv. Ntxiv mus, HPMC yog lub luag haujlwm tseem ceeb tshaj plaws ntawm dej tuav cia, ua raws li thickening. Hauv cov hmoov putty, tsuav li txoj dej rov qab yog qhov zoo, lub viscosity yog qhov qis dua, cov txheeb ze cov dej rov qab zoo dua, thaum viscosity yog ntau dua 100 txhiab, lub viscosity ntawm dej khaws cia tsis yog ntau.

6, HydroxyPropyL methyl cellulose (HPMC) Dab tsi yog cov ntsuas ntsuas tseem ceeb? Cov.

Teb: Hydroxyproprotsl cov ntsiab lus thiab viscosity, feem ntau cov neeg siv kev saib xyuas txog ob qhov ntsuas no. Hydroxypropyl cov ntsiab lus yog qhov siab, dej khaws cia yog feem ntau zoo dua. Viscosity, dej tuav, txheeb ze (tab sis tsis paub meej) kuj zoo dua, thiab viscosity zoo dua rau siv qee qhov.

7, HydroxyPropyyl methyl cellulose (HPMC) Dab tsi yog cov khoom siv raw tseem ceeb?

Teb: HydroxyPropyL methyl cellulose (HPMC) lub suab paj nruag tseem ceeb, tshuaj ntsuab, acid, isopropyl cawv thiab lwm yam.

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

Teb: HPMC hauv cov hmoov ua kom muaj zog, ua kom tuab, dej thiab kev tsim kho peb lub luag haujlwm. Thickening: cellulose tuaj yeem ua kom tuab rau kev ncua, yog li txoj kev daws teeb meem tseem hnav ris tsho thiab nce lub luag haujlwm ntawm kev tua neeg khiav tawm. Dej khaws cia: Ua kom muaj hmoov qhuav qhuav maj mam, ib qho kev tso tshuaj calcium hauv kev ua ntawm cov dej tawm. Kev tsim kho: cellulose lubrication, tuaj yeem ua rau cov hmoov putty muaj kev tsim kho kom zoo. HPMC tsis koom nrog kev siv tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm txhawb nqa. Tawv hmoov thiab dej, ntawm phab ntsa, vim yog cov tshuaj lom neeg, vim tias ntawm cov tshuaj tshiab, thiab tom qab ntawd siv, tsis zoo, vim tias tau tsim ib qho khoom tshiab (calcium carbonate). Lub ntsiab sib xyaw ntawm grey calcium hmoov yog sib tov ntawm ca (huag) 2, cao = Ca (Oh) 2 - CA (CA + H2O H2O Grey Calcium hauv Dej thiab huab cua nyob rau hauv kev txiav txim ntawm CO2, calcium carbonate, thiab HPMC tsuas yog muaj cov tshuaj tiv thaiv grey zoo dua, nws tus kheej tsis koom nrog txhua yam tshuaj tiv thaiv.

9.HPMC tsis-ionic cellulose ether, yog li dab tsi tsis-ionic?

A: Feem ntau hais lus, tsis yog ions cov tshuaj uas tsis ionize hauv dej. Ionatization yog qhov sib cais ntawm cov electrolyte rau hauv kev hloov pauv dawb. Piv txwv li, cov ntsev peb noj txhua txhua hnub - sodium chloride (nacl) yaj tawm sodium-txav mus los thiab chloride zoo thiab cle) nrog tus nqi tsis zoo. Ntawd yog, HPMC nyob rau hauv dej tsis cuam tshuam rau kev them nqi, tab sis muaj li molecules.

10. Dab tsi cuam tshuam nrog cov gel kub ntawm hydroxyprropy kasthyl cellulose?

- Teb: Qhov kub ntawm qhov kub ntawmHPMCmuaj feem xyuam nrog tshuaj methoxyl cov ntsiab lus, qis dua cov ntsiab lus methoxyl ↓, ntau dua cov gel kub.

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

Teb: Putty hmoov poob hmoov feem ntau thiab cov tshauv calcium zoo muaj kev sib raug zoo heev, thiab HPMC tsis muaj kev sib raug zoo dhau. Cov ntsiab lus tsawg dua ntawm cov ntsiab lus muaj calcium thiab cov tshuaj tsis raug cai ntawm Cao thiab Ca (Oh) 2 hauv grey calcium yuav ua rau hmoov ntsuab. Yog tias muaj kev sib raug zoo me me nrog HPMC, tom qab ntawd HPMC cov dej tswj tsis zoo, yuav ua rau cov hmoov.

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

- Teb: HPMC txias dej Instant kua hom yog tom qab kev kho mob glyox nrawm, tab sis tsis yog tiag tiag li, tab sis yuav txawv, yog yaj. Lub thermosoluble hom tsis tau raug kho saum npoo nrog glyoxal. Tus nqi ntawm glyoxal yog loj, qhov dispersion yog nrawm, tab sis cov viscosity yog qeeb, tus nqi me me, ntawm qhov tsis tooj.

13, HydroxyPropyyl methyl cellulose (HPMC) hnov ​​tsw yog li cas nws yog?

- Teb: HPMC tsim los ntawm kev daws txoj kev yog ua los ntawm toluene thiab isopropyl cawv. Yog hais tias ntxuav tsis zoo heev, yuav muaj qee qhov chaw seem.

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

- Teb: Yuav tsum dhuav nrog daim ntawv thov ntawm tus menyuam hmoov: qhov yuav tsum tau yog qis dua, tsis pom zoo 100 txhiab, nws yog ib qho tseem ceeb kom tiv thaiv dej yuav tsum tau ze. Tshuaj daim ntawv thov tshuaj tua: Qhov yuav tsum tau ua tiav, muaj cov viscosity siab, 150 txhiab yuav zoo dua. Cov ntawv thov kua nplaum: Qhov kev xav tau rau cov khoom lag luam tam sim ntawd, siab viscosity.

15.What yog lub npe ntawm hydroxypropyl methyl cellulose?

- Teb: HydroxyPropyl methyl cellulose, sau ntawv luv li 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 putty hmoov, putty hmoov npuas yog vim li cas?

Teb: HPMC hauv cov hmoov ua kom muaj zog, ua kom tuab, dej thiab kev tsim kho peb lub luag haujlwm. Tsis koom nrog yam tshuaj tiv thaiv. Cov ua rau cov npuas: 1, dej ntau dhau. 2, hauv qab yog tsis qhuav, nyob rau sab saum toj ntawm txheej scraping txheej, kuj yooj yim rau blister.

17. Dab tsi yog qhov txawv ntawm HPMC thiab MC?

- Teb: MC yog methyl cellulose, uas yog ua los ntawm cellulose ether los ntawm kev tawm tsam methane tshuaj ntsuab tom qab kho suab paj rwb yog kho nrog alkali. Feem ntau, cov qib degree hloov tau yog 1.6 ~ 2.0, thiab lub solubility sib txawv nrog cov qib hloov pauv. Belongs rau nousionic cellulose ether.

(1) Cov dej ua kom rov qab los ntawm methyl cellulose yog nyob ntawm nws cov nyiaj, viscosity, particle zoo heev thiab ntseeg tus nqi. Feem ntau ntxiv cov nyiaj loj, me me, viscosity, retient tus nqi yog siab. Ntawm lawv, tus nqi ntawm kev cuam tshuam muaj qhov cuam tshuam zoo tshaj plaws ntawm cov dej khaws cia, thiab viscosity tsis yog ib feem ntawm cov dej khaws cia. Qhov kev sib cais zuj zus feem ntau yog nyob ntawm qhov kev hloov kho deg degree thiab particle zoo kawg ntawm cellulose sau. Nyob rau hauv cov kev hais ua ke saum toj no ob peb cellulose muaj kev hais txog, methyl cellulose thiab hydroxypropy cellulose dej tus nqi qis dua.

(2) Methyl cellulose yog soluble hauv dej txias, uas yog qhov nyuaj rau yaj hauv dej kub. Nws cov kev daws teeb meem aqueous yog ruaj khov nyob rau hauv lub ph = 3 ~ 12. 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 tau txog 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 qhov ntsuas kub ntawm txoj kab pheeb suab tshaj 40 ℃, dej tuav tseg ntawm methyl cellulose yuav muaj kev phem zog, uas cuam tshuam rau cov cug cug.

(4) Methyl cellulose tau pom meej meej rau ntawm kev ua kom huv thiab nplaum ntawm cug. "Adhesion" ntawm no yog hais txog cov adhesion xav los ntawm tus neeg ua haujlwm ntawm lub cuab yeej thiab lub phab ntsa substrate, uas yog lub shear tsis kam ntawm lub cug. Adhesion loj, lub shear kuj ntawm cug cug yog loj, lub zog uas yuav tsum tau los ntawm cov neeg ua haujlwm ntawm cov neeg ua haujlwm ntawm cov txheej txheem kuj tseem loj, thiab kev siv tshuaj khib ntawm cug tsis zoo. Hauv cellulose ether khoom, cov nplaum ntawm methyl cellulose yog nyob rau theem qib.

HPMC rau hydroxypropyl cellulose, yog kho kom zoo nkauj tom qab kev kho mob alkali, nrog rau tus neeg sawv cev alkali, los ntawm cov tshuaj tiv thaiv kab mob alkali, los ntawm cov tshuaj tiv thaiv kab mob alkali, los ntawm cov tshuaj tiv thaiv kab mob alkali, los ntawm cov tshuaj tiv thaiv kab mob alkali, los ntawm cov tshuaj tiv thaiv kab mob alkali, los ntawm cov tshuaj tiv thaiv kab mob alkali, los ntawm cov tshuaj lom neeg tsis yog etha Qib degree hloov chaw yog feem ntau 1.2 ~ 2.0. Nws cov khoom sib txawv nrog kev faib ua feem ntawm methoxy thiab hydroxypropropsyl cov ntsiab lus.

(1) HydroxyPropyyl methyl cellulose yog yooj yim soluble hauv dej txias, uas yog qhov nyuaj rau yaj hauv dej kub. Txawm li cas los xij, nws cov gelation ntsuas kub hauv dej kub yog qhov siab dua li ntawm methyl cellulose. Lub solubility ntawm methyl cellulose hauv dej txias kuj tseem txhim kho ntau heev.

(2) Lub viscosity ntawm hydroxypropyl cellulose muaj feem xyuam rau nws cov molecular hnyav, thiab ntau dua molecular hnyav, ntau dua viscosity. Kub kuj cuam tshuam rau viscosity. Viscosity txo li kub nce ntxiv. Tab sis nws viscosity cov nyhuv kub 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 puag, thiab nws cov kua aqueous yog qhov ruaj khov heev hauv cov ph = 2 ~ 12. Caustic dej qab zib thiab kua qaub muaj cov nyhuv me me rau nws cov khoom, tab sis alkali tuaj yeem nrawm nws cov kev cais tawm thiab txhim kho lub viscosity. Hydroxypropyl cellulose yog ruaj khov rau cov ntsev dav dav, tab sis thaum cov viscrot ntawm hydroxypropyl cellulose kev daws teeb meem loj.

(4) Cov dej ua kom muaj zog ntawm hydroxypropyl cellulose yog nyob ntawm nws cov tshuaj thiab cov dej khaws cia siab dua li ntawm methyl cellulose ntawm tib cov tshuaj.

(5) HydroxyPropylropy Cellulose tuaj yeem sib xyaw nrog dej-soluble polymer sib txuas ua ke 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, zaub kua nplaum thiab lwm yam.

(6) cov nplaum ntawm hydroxypropyl cellulose rau tshuaj kho kom zoo siab dua li methyl cellulose.

(7) Hydroxypropyl cellulose muaj cov enzyme tsis tshua muaj dua li methyl cellulation muaj peev xwm qis dua li methyl cellulose.

18. Dab tsi yuav tsum tau them nyiaj rau hauv kev siv ntawm kev sib raug zoo ntawm viscosity thiab qhov kub ntawm HPMC?

Teb: viscosity ntawmHPMCyog 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, peb tab tom tham txog viscosity ntawm 2% ntawm cov khoom hauv dej ntawm 20 degrees Celsius.

Hauv cov tswv yim thov, hauv cov cheeb tsam nrog cov loj sib txawv ntawm lub caij ntuj sov thiab lub caij ntuj no, nws yuav tsum tau siv cov viscosity tsis tshua muaj zog nyob rau lub caij ntuj no, uas yog qhov tseem ceeb rau kev tsim kho. Txwv tsis pub, thaum ntsuas kub yog tsawg, viscosity ntawm cellulose yuav nce ntxiv, thiab thaum scraping, qhov kev xav yuav hnyav.

Nruab nrab viscosity: 75000-100000 tsuas yog siv rau putty.

Vim li cas dej zoo khaws cia.

High viscosity: 150000-200000 yog siv rau polystyrene particide capple cap roj hmab hmoov thiab vitrified hlaws 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 zoo dua cov dej ua kom zoo, muaj ntau cov tshuaj volcosity cellulose (75000 viscosity cellulose (20000-40000) los txo cov nyiaj ntawm qhov ntxiv.