1. Pib
HydroxyPropyyl methylcellose (HPMC) yog lub cellulose ether dav siv hauv cov ntaub ntawv hauv tsev. Hauv daim ntawv thov ntawm cov hmoov putty, HPMC ua si tseem ceeb tshaj plaws hauv nws cov nplaum thiab cov dej sib npaug, cuam tshuam ncaj qha cuam tshuam rau kev ua haujlwm tsim kho thiab siv cov hmoov txhuas.
2. Cov yam ntxwv yooj yim ntawm HPMC
HPMC yog cov tsis-ionic cellulose ether tau los ntawm kev hloov tshuaj lom neeg ntawm ntuj cellulose. Methoxy thiab hydroxyprropoxy pawg tau qhia rau nws cov qauv molecular, uas ua rau HPMC muaj cov dej solubility thiab ua yeeb yaj kiab ua yeeb yam. Tsis tas li ntawd, HPMC kuj muaj cov tshuaj ruaj khov thiab tiv taus rau enzymatic hydrolysis, uas ua rau nws dav siv hauv cov ntaub ntawv hauv tsev.
3. Mechanism ntawm kev txhim kho lub adhesion ntawm cov hmoov putty
3.1 Cov Kev Ua Si Nto thiab Wettability
HPMC muaj cov dej num zoo, uas tuaj yeem txo cov kev sib cuam tshuam ntawm kev sib cuam tshuam ntawm putty hmoov ntawm hmoov thiab substrate nto thiab nce lub wettability thiab nce cov wettability ntawm cov khoom. Thaum putty hmoov hu rau lub substrate, HPMC tuaj yeem txhawb kev faib cov khoom noj kom zoo nkauj hauv cov hmoov av, Li txhim kho cov nplaum ntawm cov hmoov nplaum.
3.2 Zaj duab xis-tsim cov khoom
HPMC tuaj yeem tsim cov tshuaj khov kho ruaj khov hauv kev daws teeb meem aqueous. Raws li cov dej yaj, HPMC yuav tsim ib zaj duab xis nyuaj thiab ywj zaj duab xis nyob rau saum npoo ntawm substrate. Daim yeeb yaj kiab no tsis tuaj yeem tsuas yog kho cov hmoov uas muaj kev ntxhov siab thiab tsis muaj kev tiv thaiv kom sov,
3.3 Cov ntsiab lus choj nyob sib txawv
HPMC tuaj yeem ua raws li phau ntawv sau ua hmoov rau putty hmoov los tsim tus choj sib raug zoo. Tus choj sib raug zoo no tsuas yog txhim kho cov nplaum ntawm cov khoom siv rau hauv cov hmoov av, tab sis kuj tseem cuam tshuam cov nyhuv ntawm cov hmoov uas muaj zog thiab cov hmoov av. Lub ntev-saw lwg ntawm HPMC tuaj yeem nkag mus rau hauv qhov hws lossis ntxhib mus rau ntawm lub substrate, yog li txuas ntxiv txhim kho cov nplaum ntawm cov hmoov nplaum.
4. Mechanism rau kev txhim kho cov dej rov qab los ntawm cov hmoov putty
4.1 Cov dej ua kom qhuav thiab ncua sijhawm kom qhuav
HPMC muaj cov khoom siv kom zoo thiab tuaj yeem ncua qhov loj ntawm cov dej hauv cov hmoov putty. Cov cuab yeej no yog ib qho tseem ceeb rau cov txheej txheem kev tsim kho, vim tias muaj dej txaus rau kev siv dej haus rau cov txheej txheem kev haus dej thiab kev sib tw thaum lub sijhawm ua kom qhuav. HPMC tuaj yeem tuav dej, yog li ntawd putty hmoov tuaj yeem tswj kev tsim kho cov khoom tsim nyog rau lub sijhawm ntev, yog li kev tiv thaiv kev tsim kho kev tsim kho thiab tiv thaiv kev tawg nrawm dhau.
4.2 Nce cov kev sib txuam ntawm cov dej xa tawm
Tus qauv Mesh tsim los ntawm HPMC hauv cov hmoov Putty tuaj yeem faib dej thiab zam qhov teeb meem ntawm cov dej hauv zos ntau dhau los yog tsis muaj ntau. Qhov kev faib tawm dej no tsuas yog siv cov hmoov uas muaj cov hmoov txhuas kom qhuav, tab sis kuj ua kom cov teeb meem tsis sib xws, txo cov teeb meem kev ntxhov siab uas yuav tshwm sim thaum lub sijhawm ua kom qhuav.
4.3 Txhim kho cov dej noo cia
HPMC hloov kho cov av noo ntawm cov hmoov av ntawm cov hmoov putty los ntawm kev nqus dej thiab tso dej, kom nws tuaj yeem tswj cov kev tsim nyog ntawm ntub dej hauv qab cov kev tsim kho. Lub dej noo kev ua kom ntev tsuas yog ncua sij hawm ntawm cov hmoov putty, tab sis kuj tseem ua haujlwm rau cov neeg ua haujlwm kom zoo dua thiab txo cov kev xav tau ua haujlwm thiab kho kom zoo dua qub.
5. Thov cov piv txwv
Hauv cov ntawv thov tiag tiag, cov concentration ntawm HPMC hauv cov hmoov putty feem ntau yog nyob nruab nrab ntawm 0.1% thiab 0.5% Piv txwv li, thaum tsim hauv qhov kub thiab txias, tus nqi HPMC tuaj yeem tsim nyog nce ntxiv kom cov dej khaws cia thiab tiv thaiv kom qhuav ntawm cov hmoov putty. Ntawm qhov tod tes, nyob rau hauv lub sij hawm, nyob rau hauv lub sij hawm nyob rau hauv cov sij hawm uas muaj kev ua tau siab dua, kev ua tau zoo ntawm putty pattya kuj tseem tuaj yeem txhim kho cov ntsiab lus ntawm HPMC.
Daim ntawv thov ntawm HPMC nyob rau hauv putty hmoov zoo dua txhim kho nws cov nplaum thiab cov dej khaws cia. Ob txoj kev ua tau zoo no tau ua tiav los ntawm cov chaw ua si saum npoo av, ua yeeb yaj kiab ua yeeb yam ntawm HPMC, thiab nws cov dej kom qhuav thiab noo noo retient muaj peev xwm. Cov lus qhia ntawm HPMC tsis yog txhim kho kev tsim kho cov hmoov txhuas, tab sis kuj tseem muaj teeb meem tag nrho ntawm kev tsim kho, thiab muab cov khoom siv txhim khu kev qha rau kev txhim kho cov ntaub ntawv kho kom zoo nkauj lub tsev.
Lub Sijhawm Post: Feb-17-2025