1. Dab tsi yog lub npe ntawm hydroxypropyl methylcelulose?
- Hydroxypropy cellulose, Lus Askiv Cellulose, Lus Askiv: HydroxyPropy Cellulose Pletrigiation: HPMC lossis MHPC Alias: Hypromellose; Cellulose hydroxypropyl methyl ether; Hypromellose, cellulose, 2-hydroxyprropylsyl cellulose ether. Cellulose hydroxypropyl methylety ether ether.
2. Dab tsi yog lub ntsiab ntawv thov ntawm hydroxypropyl methylcelulose (HPMC)?
- HPMC tau siv dav hauv cov khoom tsim kho, cov khoom siv hluavtaws, cov tshuaj, cov khoom noj, tshuaj ua liaj ua teb, luam yeeb thiab lwm yam tshuaj lom neeg. HPMC tuaj yeem sib faib ua qib kev tsim kho, khoom noj thiab cov qib tshuaj raws li lub hom phiaj. Tam sim no, feem ntau ntawm cov khoom lag luam yog cov qib kev tsim kho. Hauv cov hmoov tsim kho, ua kom muaj hmoov rau hauv cov nyiaj ntau, kwv yees li 90% yog siv rau cov hmoov ua kom muaj hmoov, thiab cov so yog siv rau cov txiv kab ntxwv xis thiab lo kua nplaum.
3. Muaj ntau hom kev hydroxypropyl methylcellose (HPMC), thiab dab tsi yog qhov sib txawv hauv lawv cov kev siv?
- HPMC tuaj yeem faib ua cov hom khoom tseem ceeb thiab kev kub-xaus. Cov khoom lag luam tam sim ntawd tau sai sai hauv dej txias thiab ploj mus rau hauv dej. Nyob rau lub sijhawm no, cov kua tsis muaj viscosity vim HPMC tsuas yog dispersed hauv dej yam tsis muaj kev sib cais tiag. Kwv yees li 2 feeb, lub viscosity ntawm cov kua maj mam nce, kev sib sau pob tshab viscous colloid. Cov khoom kub kub yaj, thaum ntsib nrog dej txias, tuaj yeem tawg nrawm nrawm hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias rau qhov kub thiab txias, qhov dav dav yuav maj mam tshwm sim kom txog thaum nws tsim lub pob tshab viscous colloid. Qhov kub-melt hom tsuas yog siv rau hauv cov hmoov ua kom muaj hmoov thiab tshuaj khib. Hauv cov kua nplaum kua thiab pleev xim, yuav muaj pab pawg tshwm sim thiab tsis tuaj yeem siv. Cov hom tseem ceeb muaj cov kev siv dav dav. Nws tuaj yeem siv tau hauv cov hmoov ua kom muaj hmoov thiab tshuaj khib, nrog rau kua nplaum ua kua thiab pleev xim, tsis muaj cov contraindications.
4. Yuav ua li cas xaiv hydroxypropyf methylcellose (HPMC) rau cov hom phiaj sib txawv?
Neeg yuav khoom :: Daim ntawv thov ntawm Putty Hmoov: Qhov yuav tsum tau muaj tsawg, thiab viscosity yog 100,000, uas yog txaus. Qhov tseem ceeb tshaj plaws yog kom dej kom zoo. Daim ntawv thov ntawm cug: qhov yuav tsum tau muaj, siab viscosity, 150,000 yog qhov zoo dua. Daim ntawv thov ntawm cov kua nplaum: Cov khoom tseem ceeb uas yuav tsum muaj viscosity siab.
5. Dab tsi yuav tsum tau them nyiaj rau hauv qhov kev thov tiag tiag ntawm kev sib raug zoo ntawm viscosity thiab qhov kub ntawm HPMC?
- Lub viscosity ntawm HPMC yog inversely proportional rau qhov kub, uas yog hais, viscosity nce li qhov kub tsawg dua. Lub viscosity ntawm cov khoom peb feem ntau yog xa mus hais txog qhov kev xeem ua rau nws 2% kev daws teeb meem ntawm qhov kub ntawm 20 degrees Celsius.
Hauv kev siv cov kev siv, nws yuav tsum tau sau tseg tias hauv cov cheeb tsam uas muaj qhov sib txawv loj ntawm lub caij ntuj sov thiab lub caij ntuj no, nws raug nquahu kom siv cov viscosity tsis tshua muaj zog nyob rau lub caij ntuj no, uas yog ntau dua rau kev tsim kho kom tsim kho. Txwv tsis pub, thaum ntsuas kub yog tsawg, viscosity ntawm cellulose yuav nce, thiab txhais tes xav tias yuav hnyav thaum scraping.
Nruab nrab viscosity: 75000-100000 tsuas yog siv rau putty
Vim li cas: Cov Dej Zoo
High viscosity: 150000-200000 siv rau polystyrene particle rwburrch couring cap roj hmab hmoov thiab vitrified micral thermal rwb thaiv tsev cug.
Vim li cas: Lub viscosity yog siab, cug tsis yooj yim kom poob tawm, sag, thiab kev tsim kho tau zoo dua.
6. HPMC yog cov tsis-ionic cellulose ether, yog li dab tsi tsis yog-ionic?
Lub ntsiab lus: Nyob rau hauv Layman cov lus, tsis muaj iions muaj tshuaj uas tsis ionize hauv dej. Ionization hais txog cov txheej txheem uas ib qho electrolyte rau hauv kev them nyiaj rau hauv kev them nyiaj rau hauv cov kuab tshuaj tshwj xeeb (xws li dej, cawv). Piv txwv li, sodium chloride (nacl), ntsev peb noj txhua hnub, yaj nyob rau hauv dej thiab chloride ions (cl) uas yog tsis zoo. Uas yog hais, thaum HPMC tau muab tso rau hauv dej, nws yuav tsis cais tawm rau hauv cov pej xeem, tab sis muaj nyob rau hauv daim ntawv ntawm molecules.
Lub sijhawm Post: Apr-26-2023