HPMC (HydroxyPropyyl methylcellulose)Yog ib feem siv polymer compound uas tau siv dav hauv thaj teb cov nplaum. Nws ua lub luag haujlwm tseem ceeb hauv ntau yam ntawm cov nplaum.
1. Thickening tus neeg sawv cev
HPMC yog qhov tuab tuab uas tuaj yeem txhim kho cov viscosity thiab kev ruaj ntseg ntawm cov nplaum. Nws cov qauv molecular muaj muaj zog hydrophilicity thiab polysaccharide chains, thiab tuaj yeem tsim cov kev daws teeb meem colloidal hauv dej lossis cov kuab tshuaj. Cov xeeb ceem no tuaj yeem tiv thaiv cov nplaum los ntawm delaminating lossis khom thaum lub sijhawm cia thiab siv, yog li ua kom muaj kev sib txawv ntawm cov nplaum.
2. Txhim Kho Cov Khoom Siv Adhesion
HPMC muaj cov nplaum zoo tshaj plaws thiab tuaj yeem txhim kho cov nplaum ntawm cov nplaum rau lub substrate. Tom qab tau coated nyob rau saum npoo ntawm substrate, hpmc molecules tuaj yeem nkag mus rau hauv lub ntsej muag zoo ib yam li cov ntaub ntawv xws li cov ntawv, fiber, ntoo thiab ceramics.
3. Zaj duab xis-tsim cov khoom
HPMCMuaj cov yeeb yaj kiab zoo tshaj plaws thiab tuaj yeem ua ib qho khoom zoo nkauj thiab cov yeeb yaj kiab txuas ntxiv tom qab txheej. Zaj duab xis no muaj qhov zoo thiab elasticity thiab tuaj yeem muab ib txheej ntxiv ntawm kev tiv thaiv rau cov nplaum, txhim kho lub durability thiab waterproofness ntawm daim ntawv cog lus. Ib qho ntxiv, cov yeeb yaj kiab txo qhov cuam tshuam ntawm ib puag ncig sab nraud, xws li cov av noo lossis cua sov hloov pauv, ntawm cov nplaum ua haujlwm.
4. Dej Tuav
HPMCMuaj kev txhawb nqa dej zoo heev thiab tuaj yeem xauv noo nyob hauv cov nplaum kom tiv thaiv cov dej ntau dhau. Cov yam ntxwv no tshwj xeeb yog qhov tshwj xeeb hauv cov khoom nplaum dej thiab cov khoom siv casy, uas tsis txhob ua kom tiav lub sijhawm qhib kev ua tau zoo los ntawm kev ua haujlwm nrawm.
5. Stabilizer nyhuv
HPMC tuaj yeem txhim kho qhov ruaj khov ntawm cov nplaum ntawm cov nplaum ntawm cov nplaum lossis agglomeration ntawm cov khoom muaj, thiab tswj cov khoom lag luam. Cov pab pawg ua haujlwm hauv nws cov molecular kuj tseem tuaj yeem ua haujlwm synergistically nrog rau lwm yam los txhim kho kev ruaj khov thiab ua haujlwm ntawm cov qauv.
6. Ib puag ncig ua phooj ywg
HPMC yog cov khoom tau los ntawm kev hloov tshuaj lom neeg ntawm cov cellulose ntuj. Nws yog tsis muaj tshuaj lom, tsis muaj teeb meem thiab biodegradable. Nws daim ntawv thov hauv cov nplaum ua raws li cov kev tiv thaiv niaj hnub thiab muaj txiaj ntsig zoo tshaj plaws hauv kev tsim kho, ntim thiab khoom noj khoom haus.
7. Kho Rheology
Cov khoom tshwj xeeb ntawm HPMC hauv kev daws (xws li shear thinning) pab kom cov nplaum kom muaj cov khoom siv zoo thaum nruab lub sijhawm thov. Nws viscosity zuj zus nyob rau hauv lub siab mob, ua kom yooj yim pleev xim, tshuaj tsuag, thaum nws cov khoom siv viscosity, ua kom muaj cov nplaum zoo ntawm cov khoom siv rau lub substrate.
Chaw thov
Raws li ib qho tseem ceeb tivthaiv ntawm cov nplaum, HPMC tau dav siv hauv cov teb hauv qab no:
Kev lag luam kev tsim kho: xws li cov hmoov av nplaum, ua kom muaj hmoov, muab cov khaub noom sib tov qhuav, siv los txhim kho kev tsim kho thiab ua kom muaj zog txhim kho.
Woodworking nplaum: Txhim kho txoj kev sib raug zoo ntawm ntoo thiab tiv thaiv kev tawg.
Papermaking thiab luam ntawv: siv rau daim ntawv txheej los txhim kho lub smoothness thiab adhesion.
Textile thiab Tawv: siv rau kev ua fiber ntau thiab tawv tsev.
HPMCUa si ntau lub luag haujlwm hauv cov nplaum xws li thickening, dej tuav, ruaj, nplaum li thiab zaj duab xis txhim kho thiab zaj duab xis. Nws tseem muaj qhov zoo ntawm kev tiv thaiv ib puag ncig thiab kho tau rheology. Cov khoom no ua rau nws tsis tseem ceeb thiab tseem ceeb ntawm cov qauv zoo nkauj, muab kev txhawb nqa tseem ceeb rau kev txhim kho cov khoom lag luam thiab kev sib tham sib txawv.
Lub Sijhawm Post: NOV-23-2024