Hydroxypropyl Methylcellulose (HPMC)yog ib qho tseem ceeb hauv tsev cov khoom siv ntxiv, dav siv hauv cov cement mortar, mortar qhuav, coatings thiab lwm yam teb. HPMC plays lub luag haujlwm tseem ceeb hauv cov dej khaws cia ntawm mortar, thiab tuaj yeem txhim kho kev ua haujlwm, fluidity, adhesion thiab tawg tsis kam ntawm mortar. Tshwj xeeb tshaj yog nyob rau hauv niaj hnub kev tsim kho, nws plays lub luag hauj lwm irreplaceable nyob rau hauv kev txhim kho qhov zoo thiab kev tsim kho nyhuv ntawm mortar.
1. Cov yam ntxwv tseem ceeb ntawm HPMC
HPMC yog cellulose derivative hloov los ntawm cellulose chemistry, nrog zoo solubility, adhesion thiab thickening zog. AnxinCel®HPMC molecules muaj ob pawg, hydroxypropyl thiab methyl, uas ua rau nws muaj cov yam ntxwv ntawm kev sib txuas ntawm hydrophilicity thiab hydrophobicity, thiab tuaj yeem ua haujlwm zoo nyob rau hauv ib puag ncig sib txawv. Nws lub luag haujlwm tseem ceeb suav nrog thickening, dej tuav, txhim kho rheology thiab adhesion ntawm mortar, thiab lwm yam.
2. Kev txhais thiab qhov tseem ceeb ntawm kev tuav dej
Kev tuav dej ntawm mortar yog hais txog lub peev xwm ntawm mortar khaws dej thaum lub sijhawm tsim kho. Kev poob dej hauv mortar ncaj qha cuam tshuam rau nws cov txheej txheem hardening, lub zog thiab kev ua haujlwm kawg. Yog hais tias cov dej evaporates sai heev, cov cement thiab lwm cov ntaub ntawv cementitious nyob rau hauv lub mortar yuav tsis muaj sij hawm txaus los mus rau cov tshuaj tiv thaiv hydration, uas ua rau lub mortar tsis txaus thiab adhesion tsis zoo. Yog li ntawd, kev tuav dej zoo yog tus yuam sij rau kev ua kom zoo ntawm mortar.
3. Qhov cuam tshuam ntawm HPMC ntawm kev tuav dej khib nyiab
Qhov sib ntxiv ntawm HPMC rau mortar tuaj yeem txhim kho cov dej tuav ntawm mortar, uas yog qhia tshwj xeeb hauv cov hauv qab no:
(1) Txhim kho lub peev xwm tuav dej ntawm mortar
HPMC tuaj yeem tsim cov qauv zoo li hydrogel hauv mortar, uas tuaj yeem nqus tau thiab khaws cov dej ntau, yog li ncua cov dej evaporation. Tshwj xeeb tshaj yog thaum tsim nyob rau hauv qhov kub thiab txias ib puag ncig, cov dej tuav ntawm HPMC plays lub luag haujlwm tseem ceeb. Los ntawm kev txhim kho cov dej tuav, HPMC tuaj yeem xyuas kom meej tias cov dej hauv cov mortar tuaj yeem koom nrog cov tshuaj tiv thaiv dej ntawm cov cement thiab txhim kho lub zog ntawm cov mortar.
(2) Txhim kho qhov fluidity thiab kev ua haujlwm ntawm mortar
Thaum lub sij hawm kev tsim kho, lub mortar yuav tsum muaj ib tug tej yam fluidity los pab txhawb kev ua hauj lwm ntawm cov neeg ua hauj lwm kev tsim kho. Kev tuav dej zoo tuaj yeem ua rau qeeb qeeb kom qhuav ceev ntawm mortar, ua rau nws yooj yim dua thiab yooj yim rau cov neeg ua haujlwm tsim ua haujlwm xws li smearing thiab scraping. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho cov viscosity ntawm mortar thiab tiv thaiv kev sib cais ntawm mortar los yog sedimentation, yog li tswj nws cov uniformity.
(3) Kev tiv thaiv mortar nto tawg
Tom qab HPMC txhim kho cov dej tuav ntawm mortar, nws tuaj yeem txo cov evaporation sai ntawm cov dej ntawm cov mortar nto thiab txo qhov kev pheej hmoo ntawm kev tawg. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj qhov kub thiab txias los yog tsis tshua muaj av noo, ceev evaporation ntawm cov dej tuaj yeem yooj yim ua rau cov kab nrib pleb. HPMC pab tswj cov dej noo ntawm cov mortar los ntawm kev ua kom cov dej poob qis, tswj kev ncaj ncees ntawm mortar thiab tsis txhob tsim cov kab nrib pleb.
(4) Ua kom lub sijhawm qhib ntawm mortar
Lub sijhawm qhib ntawm mortar yog hais txog lub sijhawm uas mortar tuaj yeem ua haujlwm thaum lub sijhawm tsim kho. luv luv lub sij hawm qhib yuav cuam tshuam rau kev tsim kho efficiency. Qhov sib ntxiv ntawm HPMC tuaj yeem ua kom ntev lub sijhawm qhib ntawm mortar, muab sijhawm rau cov neeg ua haujlwm tsim kho ntau dua los ua haujlwm xws li khawb thiab smearing. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig kev tsim kho, ncua lub sijhawm qhib tuaj yeem ua kom muaj qhov adhesion thiab kev ua haujlwm ntawm mortar.
4. Mechanism ntawm HPMC qhov kev cuam tshuam ntawm kev tuav dej mortar
Lub ntsiab mechanisms ntawm HPMC nyob rau hauv kev txhim kho mortar dej tuav yog raws li nram no:
(1) Hydration thiab molecular qauv
HPMC molecules muaj ntau ntawm hydrophilic hydroxyl (-OH) thiab hydroxypropyl (-CH2OH) pawg, uas tuaj yeem tsim cov hydrogen bonds nrog dej molecules thiab txhim kho adsorption ntawm dej molecules. Tsis tas li ntawd, HPMC muaj cov qauv molecular loj thiab tuaj yeem tsim cov qauv peb-dimensional network hauv mortar, uas tuaj yeem ntes thiab khaws cov dej thiab ua kom cov dej ntws qeeb.
(2) Ua kom qhov sib xws thiab viscosity ntawm mortar
Thaum AnxinCel®HPMC muab ntxiv rau hauv mortar ua cov thickener, nws yuav ua rau kom qhov sib xws thiab viscosity ntawm cov mortar, ua rau cov mortar ruaj khov thiab txo cov dej poob. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig kev tsim ua kom qhuav, cov nyhuv thickening ntawm HPMC pab txhim kho cov tshuaj khib nyiab los tiv thaiv kev ua haujlwm.
(3) Txhim kho cov qauv kev ruaj ntseg ntawm cov mortar
HPMC tuaj yeem txhim kho kev sib koom ua ke ntawm mortar thiab txhim kho cov qauv kev ruaj ntseg ntawm cov mortar los ntawm nws cov kev sib cuam tshuam hauv nruab nrab. Qhov kev ruaj ntseg no tso cai rau cov dej noo ntawm cov mortar yuav tsum tau khaws cia ntawm cov cement hais rau lub sijhawm ntev, yog li ua kom muaj cov tshuaj tiv thaiv tag nrho ntawm cov cement thiab dej thiab txhim kho lub zog ntawm mortar.
5. Cov txiaj ntsig ntawm HPMC hauv kev siv tswv yim
Nyob rau hauv kev siv,HPMCfeem ntau yog siv ua ke nrog lwm cov khoom siv ntxiv (xws li plasticizers, dispersants, thiab lwm yam) kom ua tiav qhov zoo tshaj plaws mortar kev ua tau zoo. Los ntawm qhov tsim nyog proportions, HPMC tuaj yeem ua lub luag haujlwm sib txawv hauv ntau hom mortars. Piv txwv li, hauv cov cement mortar zoo tib yam, cementitious mortar, mortar qhuav, thiab lwm yam, nws tuaj yeem txhim kho cov dej tuav thiab lwm yam khoom ntawm mortar.
Lub luag haujlwm ntawm HPMC hauv mortar tsis tuaj yeem kwv yees. Nws ua kom zoo dua qub thiab siv cov tshuaj khib nyiab los ntawm kev txhim kho cov dej tuav ntawm cov tshuaj khib nyiab, ncua sij hawm qhib, thiab txhim kho kev tsim kho. Hauv kev tsim kho niaj hnub no, nrog rau kev siv technology ntau ntxiv thiab kev txhim kho txuas ntxiv ntawm kev ua haujlwm mortar, HPMC, uas yog ib qho tseem ceeb ntxiv, tab tom ua lub luag haujlwm tseem ceeb.
Lub sij hawm xa tuaj: Feb-15-2025