HydroxyPropyyl methylcellulose (HPMC) thiab hypromellose muaj tseeb tib yam sib xyaw, thiab cov lus feem ntau siv sib hloov pauv sib hloov pauv. Cov no yog cov npe sib txawv rau cov hom ntawm cov kev siv polymers uas muaj ntau yam kev lag luam nyob rau ntau yam kev lag luam suav nrog cov khoom lag luam, khoom noj thiab pleev zaub mov thiab tshuaj pleev ib ce thiab tshuaj pleev ib ce.
1. DiCemical qauv thiab muaj pes tsawg leeg:
Hydroxypropylencellulose (HPMC) yog kev hloov kho hluavtaws ntawm cellulose, lub ntuj muaj zog pom hauv tsob ntoo cell phab ntsa. Tus qauv tshuaj ntawm HPMC tau los ntawm kev qhia txog hydroxypropyl thiab methyl pawg ntawm lub hauv paus ntawm cellulose. Cov pab pawg hydroxypropyl ua rau cellulose ntau soluble hauv dej, thiab cov methyl pawg txhim kho nws cov ruaj khov thiab txo nws cov kev sib cais.
2. Kev tsim qauv tsim:
Kev tsim cov hydroxypropylulcellulose enterolves nrog prinylene oxide los qhia cov pab pawg hydroxyproproutyl thiab tom qab ntawd nrog methyl chloride kom ntxiv methyl pawg. Cov qib degree hloov pauv (DS) ntawm Hydroxypropyl tuaj yeem hloov kho thaum lub sijhawm tsim khoom, ua rau muaj cov qib kawm HPMC nrog cov khoom sib txawv.
3. Lub cev lub cev:
HPMC yog ib qho dawb rau me ntsis hnav-dawb hmoov, tsw ntxhiab thiab tsis muaj qab. Nws lub cev lub cev, xws li viscosity thiab solubility, nyob ntawm cov degree ntawm qhov hnyav ntawm lub cev polymer. Nyob rau hauv ib txwm muaj xwm txheej, nws yog yooj yim soluble hauv dej, sib sau ua pob tshab thiab tsis muaj xim.
4. Kev kho mob:
Ib qho ntawm cov ntawv thov tseem ceeb ntawm HPMC nyob hauv kev lag luam kws tshuaj. Nws yog dav siv raws li lub chaw tsim tshuaj zoo thiab ua si ntau yam kev ua haujlwm hauv kev npaj tshuaj. HPMC feem ntau pom muaj nyob hauv cov ntaub ntawv tsis zoo xws li cov ntsiav tshuaj, tsiav tshuaj, thiab tshuaj noj. Nws ua raws li cov phau ntawv sib tsoo, ua tsis taus, thiab tswj cov neeg sawv cev, ua rau muaj kev ruaj ntseg tag nrho thiab cov tshuaj.
5. Lub luag haujlwm hauv kev tswj tso tawm:
Lub peev xwm ntawm HPMC los ua cov kua txiv hauv cov kua aqueous ua rau nws muaj txiaj ntsig hauv kev tswj cov tshuaj tso tawm. Los ntawm sib txawv ntawm cov khoom siv viscosity, cov khoom siv gel tuaj yeem tswj tau tus nqi tso tawm ntawm cov khoom xyaw nquag, yog li ua tiav cov tshuaj muaj kev pab thiab ntev.
6. Daim ntawv thov hauv kev lag luam khoom noj:
Hauv kev lag luam khoom noj, HPMC yog siv los ua cov tuab, stabilizer thiab emulsifier. Nws txhim kho cov qauv ntawm ntau yam khoom noj, suav nrog cov kua ntses, kua zaub thiab cov khoom noj siv mis. Tsis tas li ntawd, HPMC yog siv nyob rau hauv gluten-dawb ci los txhim kho cov qauv thiab cov dej noo noo ntawm cov khoom gluten-dawb.
7. Kev tsim kho thiab cov ntaub ntawv hauv tsev:
HPMC yog siv hauv kev tsim kho hauv cov khoom lag luam xws li cov nplaum ua ke, cov khoom xyaw ua ke thiab cov khoom siv gypsum. Nws txhim kho cov txheej txheem txheej txheem, dej khaws cia thiab cov khoom siv nplaum ntawm cov khoom no.
8. Cov tshuaj pleev ib ce thiab cov khoom siv saib xyuas tus kheej:
Hypromellose tseem yog ib qho khoom xyaw uas nquag muaj nyob hauv cov tshuaj pleev ib ce thiab cov khoom siv saib xyuas tus kheej. Nws yog siv hauv qab zib, tshuaj pleev thiab tshuaj zawv plaub hau vim nws cov khoom siv tuab thiab ruaj khov. Ib qho ntxiv, nws yuav pab txhim kho qhov kev ntxhib los mos thiab muaj kev xav.
9. Zaj duab xis txheej hauv cov kws tshuaj:
HPMC yog dav siv nyob rau hauv kev lag luam kws tshuaj rau kev ua yeeb yam ntawm cov ntsiav tshuaj. Zaj duab xis-Coated ntsiav tshuaj muaj kev txhim kho pom pom pom pom, saj ntsej muag thiab tiv thaiv cov txheej txheem ib puag ncig. HPMC cov yeeb yaj kiab muab txoj kev du thiab sib zog, txhim kho cov khoom siv zoo tagnrho ntawm cov tshuaj.
13. Xaus:
HydroxyPropyyl methylulose (HPMC) thiab hypromellose xa mus rau tib lub cellulose-raws li cov ntawv thov hauv cov tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev tsim kho. Nws cov khoom tshwj xeeb, xws li solubility, ruaj khov thiab biodegradability, pab nws siv thoob plaws. Cov versatility ntawm HPMC hauv cov khoom lag luam sib txawv tseem ceeb nws qhov tseem ceeb ua cov khoom muaj ntau yam, thiab txuas ntxiv rov ua duaTshawb nrhiav thiab kev loj hlob tuaj yeem hloov cov kev siv ntxiv yav tom ntej.
Qhov kev nkag siab zoo no ua rau muaj kev nkag siab zoo ntawm hydroxyproylulose thiab hypromelyl ntawm ntau lub luag haujlwm, thiab elucidging lawv lub luag haujlwm ntawm sha puab cov khoom lag luam thiab cov qauv.
Lub Sijhawm Post: Dec-21-2023