Hydroxypropylencellulose (HPMC) yog qhov tseem ceeb ntxiv hauv cov kab tsuag, uas ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov tshuaj khib. Raws li cov tsis muaj tshuaj lom, tsis muaj kuab lom thiab cov neeg muaj kuab lom thiab cov neeg muaj teeb tsa ib puag ncig xws li etongch ether thiab lignin ether hauv kev tsim kho kev tsim kho. Kab lus no yuav tham txog lub luag haujlwm tseem ceeb ntawm HPMC hauv peb txoj kev sib khi ntawm cov dej khaws cia, ua haujlwm thiab coheseniveness.
HPMC tuaj yeem txhim kho cov dej ceev ceev ntawm cug. Dej ceev ceev ntawm cult yog hais txog kev muaj peev xwm ntawm colled nws cov ntsiab lus hauv kev tsim kho. Dej ceev ceev ntawm cug yog cuam tshuam nrog kev ua yeeb yam ntawm cov cement thiab cov tshuaj ntxiv siv hauv cov kab tsuag. Yog tias lub tshuaj khib poob dej ntau dhau, nws yuav ua rau lub tshuaj khib kom qhuav tawm, uas yuav muaj teeb meem ntau yam xws li cov kab nrib pleb hauv cov khoom tiav.
HPMC muaj cov pab pawg medroxyprropyl thiab methyl pawg thiab yog hydrophilic. Nws tuaj yeem ua ib txheej ntawm zaj duab xis saum npoo av los tiv thaiv cov dej evaple kom tiv thaiv cov dej rov qab los ntawm cug. Nyob rau tib lub sijhawm, HPMC tseem tuaj yeem muab cov dej lwg los ntawm hydrogen bonds, ua rau nws nyuaj rau cov lwg dej cais los ntawm cug cais tawm. Yog li ntawd, HPMC muaj qhov cuam tshuam tseem ceeb ntawm kev txhim kho cov dej khaws cia ntawm cug.
HPMC tseem tuaj yeem txhim kho qhov ua haujlwm ntawm cug. Lub zog ntawm coll hais txog qhov yooj yim uas cug cug yuav raug tswj thiab zoo li tus kheej thaum lub sijhawm kev tsim kho. Qhov zoo dua qhov ua haujlwm ntawm cug, yooj yim dua rau cov neeg ua haujlwm tsim kho kom tswj hwm cov duab thiab muaj kuab ntawm lub tshuaj khib thaum lub tshuab tsim kho. Qhov ua haujlwm zoo ntawm cug yuav ua tau los txo tus naj npawb ntawm cov khoom cua ua tiav hauv cov khoom tiav, ua kom cov qauv ntau dua thiab khov kho.
HPMC tuaj yeem txhim kho qhov ua haujlwm ntawm colled ntawm kev txo lub viscosity ntawm cug. Lub cev hnyav molecular ntawm HPMC yog qhov tseem ceeb, thiab nws yooj yim los tsim cov hlua hydrogen nrog cov lwg dej, ua rau muaj txiaj ntsig ntau dua. Txawm li cas los xij, HPMC tuaj yeem decomposed rau hauv cov khoom me me raws li kev txiav txim ntawm shear zog, txo lub viscosity ntawm lub tshuaj khib. Yog li ntawd, thaum cov neeg ua haujlwm siv cov tshuaj khib, cov lus HPMC yuav tawg, ua kom xhp ntau cov kua dej ntau dua thiab yooj yim dua rau kev tsim. Ntxiv mus, cov pab pawg hydrophilic hauv HPMC tseem tuaj yeem ua cov yeeb yaj kiab saum npoo av, txo cov kev sib tov ua kom pom tseeb, thiab txuas ntxiv txhim kho cov haujlwm ntawm college.
HPMC tuaj yeem txhim kho cov nplaum ntawm cug. Cov nplaum ntawm collh hais txog nws lub peev xwm kom ruaj nrees rau saum npoo ntawm substrate. Zoo adhesion tuaj yeem tsim cov chaw ruaj thiab txhim khu kev qha ntawm lub tshuaj khib thiab cov txheej txheem, kom ua tiav cov khoom tiav ntawm cov khoom tiav. Ib qho ntxiv, zoo kua nplaum kuj tseem tuaj yeem ua rau saum npoo ntawm cov khoom tiav zoo smoother thiab zoo nkauj dua.
HPMC tuaj yeem txhim kho cov nplaum ntawm cug hauv ob peb txoj kev. Ua ntej tshaj plaws, HPMC tuaj yeem tsim cov yeeb yaj kiab saum npoo av ntawm cov txheej txheem tom qab kev tsim kho ntawm substrate thiab ua kom yooj yim rau cug cug rau ua raws li lub substrate. Thib ob, HPMC hais kuj tseem tuaj yeem tsim cov qauv network ntawm cov npoo av, nce thaj chaw ntawm lub tshuaj khib thiab txheej ntxiv, thiab ntxiv txhim kho cov nplaum ntawm lub tshuaj khib. Ntxiv mus, cov pab pawg hydrophilic hauv HPMC tuaj yeem ua ke nrog dej lwg me me ntawm lub cug kev tshuaj khib thiab txuas ntxiv txhim kho txoj hlua khi ntawm lub cug.
Daim ntawv thov ntawm HPMC nyob rau hauv colp muaj ntau yam zoo xws li dej tuav, ua haujlwm, thiab txhim kho adchesion. Cov txiaj ntsig no tsis yog tsuas yog siv tau cov neeg ua haujlwm pabcuam, tab sis kuj tseem muaj qhov cuam tshuam zoo rau cov khoom tiav tag nrho. Nrog rau kev txhim kho kev tshawb fawb thiab thev naus laus zis, nws ntseeg tau tias HPMC yuav ua tau zoo dua hauv kev tsim kho hauv kev tsim kho hauv kev tsim kho thiab cov ntaub ntawv zoo dua rau kev tsim kho.
Lub sij hawm Post: Sep-01-2023