HydroxyPropyyl methylcellose (HPMC) yog cov polymer compound synthesized los ntawm kev kho cov cellulose ntuj. Nws yog dav siv nyob rau hauv kev tsim kho, tshuaj, khoom noj thiab lwm daim teb. Hauv cov ntaub ntawv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv kev cug cug, HPMC ua si lub luag haujlwm tseem ceeb thiab tuaj yeem txhim kho ntau yam khoom ntawm cug.
1. Txhim khu cov dej ceev ceev ntawm cug
Dej ceev ceev ntawm collhip hais txog kev cug kom qhuav noo los yog qhov tseem ceeb rau lub zog thiab durability ntawm cug. HPMC tuaj yeem txhim kho cov dej ceev ceev ntawm cug. Nws cov qauv molecular muaj ntau ntau ntawm cov pab pawg hydrophilic, uas tuaj yeem nqus dej thiab ua cov yeeb yaj kiab co dej, yog li txo cov dej evapation. Los ntawm kev ntxiv hpmc rau tshuaj khib, lub sijhawm tsim kho ntawm cug yuav ua tau zoo kom zam kom tsis txhob tawg thiab lub zog txo tau los ntawm kev poob ntau dhau.
2. Txhim kho cov haujlwm thiab rhebology ntawm cug
Daim ntawv thov ntawm HPMC hauv kev txaws yuav ua tau yooj yim txhim kho nws cov xim thiab kev ua haujlwm. Cov rheev ntawm collh hais txog nws cov nqaij thiab deformation tus yam ntxwv nyob rau hauv kev txiav txim ntawm sab nraud rog, uas cuam tshuam rau qhov yooj yim ntawm kev ua haujlwm. HPMC, raws li cov duab polymer, tuaj yeem tsim cov qauv cloidal ruaj khov, uas tuaj yeem ua kom cov kua roj ntau dua thaum ua haujlwm thiab ua kom nws ua haujlwm. Tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem xws li plastering thiab pleev xim, cov rhuaology ntawm cug yog qhov tseem ceeb tshaj. Qhov kev sib txuas ntawm HPMC tuaj yeem ua rau cov tshuaj tshuaj khib yooj yim rau kev thov thiab txiav, txo cov kev nyuaj ntawm kev tsim kho, thiab txhim kho kev ua haujlwm tau zoo.
3. Txhim kho cov nplaum thiab los tiv thaiv cov yam ntxwv ntawm cug
Adhesion yog ib qho tseem ceeb tshaj plaws ntawm cug tshuaj kho kev ua haujlwm. Nws txiav txim siab cov nplaum ntawm cug thiab substrate, thiab cuam tshuam ncaj qha rau lub tsev ruaj khov thiab ruaj khov ntawm lub tsev. HPMC lwg me me muaj muaj zog hydrophilicity thiab ntev molecular saw qauv, uas tuaj yeem tsim cov nplaum zoo ntawm cug thiab substrate. Cov kev tshawb fawb tau pom tias kab hlau nrog rau HPMC tuaj yeem txhim kho cov nplaum ntawm lub zog ntawm lub hau hluav taws xob thiab txo qhov tsis sib xws ntawm cov tshuaj khib thiab lub hauv paus.
HPMC kuj muaj cov khoom siv los tiv thaiv plam zoo, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab sov thiab huab cua siab ib puag ncig. HPMC tuaj yeem tiv thaiv lub cug ntawm ntws lossis plam, ua kom muaj cov txheej txheem kev tsim kho, ntawm cov txheej txheem ua haujlwm ntawm cov pob zeb nteg qe, gypsum plastering, thiab lwm yam.
4. Txhim kho qhov tawg tawm ntawm cug
Thaum lub sij hawm tsim qauv, tshuaj khib yog nquag nquag tawg vim muaj ntau yam xws li huab cua thiab cov xwm txheej hauv paus. Qhov kev sib txuas ntawm HPMC tuaj yeem txhim kho qhov tawg tsis kam ntawm cug. Nws cov qauv saw hlau polymer tuaj yeem tsim cov qauv sib txuas ua ke hauv lub tshuaj khib thiab txhim kho cov kab cug, thiab tiv thaiv tau zoo los ntawm kev hloov pauv sab nraud lossis kub hloov. Tshwj xeeb tshaj yog nyob rau ib puag ncig nrog kev sib txawv qhuav-ntub dej thiab qhov loj me me, HPMC muaj peev xwm txo cov kab cug thiab txuas ntxiv kev pabcuam lub neej ntawm lub tshuaj khib.
5. Txhim kho lub zog thiab durability ntawm cug
Txawm hais tias HPMC nws tus kheej tsis tuaj yeem koom nrog kev ua kom muaj zog ntawm cov xis ntawm kev txhim kho cov qauv sab hauv ntawm lub cug. Tom qab ntxiv HPMC, qhov kev sib xyaw ntawm cug tshuaj yog qhov zoo dua qub, thiab cov tshuaj tiv thaiv ntawm cov xis nyob ntawm lub zog ntawm lub tshuaj khib. Tsis tas li ntawd, HPMC kuj muaj qee lub peev xwm tiv thaiv kev laus, uas tuaj yeem txhim kho lub zog ntawm lub cug. Hauv kev siv cov txheej txheem ntev, nws tuaj yeem ncua kev ncua kev puas tsuaj thiab kev laus ntawm lub tshuaj khib.
6. Lwm yam haujlwm
Ntxiv rau cov khoom tseem ceeb saum toj no, HPMC muaj qee qhov haujlwm hauv kev txig, xws li:
Txhim kho impermility: HPMC tuaj yeem txo qhov kev nkag ntawm ya raws thiab huab cua, txhim kho cov tsis huv ntawm lub tsev, thiab nce cov dej tsis kam ntawm lub tsev.
Kho lub sijhawm kom qhuav ntawm cug: los kho cov ntsiab lus ntawm HPMC, lub sijhawm qhuav ntawm kev tsim kho kom haum rau cov kev tsim kho kom haum thiab ua kom cov kev txhim kho kev txhim kho.
Txhim kho kev tiv thaiv ib puag ncig ntawm cug tshuaj khib: hpmc yog cov khoom siv ntuj nrog cov khoom lag luam zoo. Siv nws tuaj yeem txo cov tshuaj sib ntxiv thiab txo cov pa phem rau ib puag ncig.
Daim ntawv thov ntawm hydroxypropyl me me hauv kev sib khib tuaj yeem txhim kho nws cov kev ua haujlwm ua haujlwm ntxiv rau kev ua haujlwm ntxiv, thiab lwm yam kev ua haujlwm siab ntxiv, muaj cov kev ua haujlwm siab ntxiv, muaj kev ua tiav thov kev cia siab. Yav tom ntej, nrog kev tshawb fawb tob, kev siv HPMC hauv cov khoom siv hluav taws xob, ntxiv txhim kho cov ntaub ntawv zoo ntawm lub tsev thiab kev tsim kho cov khoom siv thiab kev tsim kho.
Lub sijhawm Post: Feb-15-2025