HPMC txhim kho kev nplaum thiab kev ua haujlwm tau zoo hauv kev lag luam kev tsim kho
HPMC (Hydroxypropyl Methylcellulose) yog ib yam khoom ua kom tuab thiab nplaum uas siv ntau hauv kev lag luam kev tsim kho. Nws ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev nplaum thiab kev ua haujlwm tau zoo hauv cov ntaub ntawv tsim kho.
1. Cov khoom siv tshuaj lom neeg thiab cov haujlwm ntawm HPMC
HPMC yog cov cellulose ether uas yaj tau hauv dej uas nws cov qauv muaj cov pob txha cellulose thiab methyl thiab hydroxypropyl pawg. Vim muaj cov tshuaj no, HPMC muaj cov khoom solubility zoo, thickening, film-forming thiab adhesive. Tsis tas li ntawd, HPMC tuaj yeem muab cov dej noo zoo dua thiab lubrication, ua rau nws siv dav hauv cov ntaub ntawv tsim kho.
2. Daim ntawv thov ntawm HPMC hauv cov ntaub ntawv tsim kho
Hauv kev lag luam kev tsim kho, HPMC siv dav hauv cov ntaub ntawv ua los ntawm cement, cov khoom gypsum, hmoov putty, tshuaj pleev xim thiab lwm yam khoom siv hauv tsev. Nws lub luag haujlwm tseem ceeb yog kho qhov sib xws ntawm cov khoom, txhim kho qhov fluidity ntawm cov khoom, txhim kho qhov lo rau ntawm cov khoom thiab ntev lub sijhawm qhib ntawm cov khoom. Cov hauv qab no yog cov ntawv thov thiab cov haujlwm ntawm HPMC hauv cov ntaub ntawv tsim kho sib txawv:
a. Cov ntaub ntawv ua los ntawm cement
Hauv cov ntaub ntawv ua los ntawm cov cement xws li cov cement mortars thiab cov nplaum pobzeb, HPMC tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov khoom siv tiv thaiv kev poob qis thiab tiv thaiv cov khoom siv los ntawm kev swb thaum lub sijhawm tsim kho. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov khaws dej ntawm cov cement mortar thiab txo cov dej evaporation hauv cov mortar, yog li txhim kho nws lub zog sib txuas. Hauv cov nplaum pobzeb ceramic, ntxiv HPMC tuaj yeem txhim kho qhov kev sib txuas ntawm cov khoom siv nplaum thiab qhov chaw ntawm cov pobzeb ceramic thiab zam qhov teeb meem ntawm kev hollowing lossis poob ntawm cov pobzeb ceramic.
b. Cov khoom siv gypsum
Ntawm cov ntaub ntawv gypsum, HPMC muaj peev xwm khaws dej zoo heev, uas tuaj yeem txo qhov dej poob thaum lub sijhawm tsim kho thiab xyuas kom meej tias cov khoom tseem ntub txaus thaum lub sijhawm kho. Cov yam ntxwv no pab ua kom muaj zog thiab ruaj khov ntawm cov khoom gypsum thaum tseem ncua sijhawm uas cov khoom siv tuaj yeem ua haujlwm, muab sijhawm ntau rau cov neeg ua haujlwm tsim kho los hloov kho thiab ua tiav.
c. Hmoov av nplaum
Hmoov putty yog ib yam khoom tseem ceeb rau kev ua kom lub tsev tiaj tus. Kev siv HPMC rau hauv hmoov putty tuaj yeem txhim kho nws txoj kev ua haujlwm hauv kev tsim kho. HPMC tuaj yeem ua rau kom cov hmoov putty sib xws, ua rau nws yooj yim dua rau kev siv thiab ua kom tiaj tus. Nws kuj tseem tuaj yeem txhim kho qhov kev sib txuas ntawm cov putty thiab txheej hauv qab kom tiv thaiv cov txheej putty kom tsis txhob tawg lossis poob. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov kev ua tau zoo tiv thaiv kev poob ntawm cov hmoov putty kom ntseeg tau tias cov khoom yuav tsis poob lossis plam thaum lub sijhawm tsim kho.
d. Cov xim pleev thiab cov xim pleev
Kev siv HPMC hauv cov txheej thiab cov xim pleev feem ntau pom tseeb hauv nws cov teebmeem thickening thiab stabilizing. Los ntawm kev kho qhov sib xws ntawm cov xim pleev, HPMC tuaj yeem txhim kho qhov sib npaug thiab kev ua haujlwm ntawm cov xim pleev thiab tiv thaiv kev sagging. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov khaws dej ntawm cov txheej, ua rau cov txheej tsim cov txheej zaj duab xis sib xws thaum lub sijhawm ziab, thiab txhim kho qhov kev nplaum thiab kev tawg ntawm cov zaj duab xis txheej.
3. Lub tshuab ntawm HPMC los txhim kho kev nplaum
HPMC ua kom cov khoom lo rau zoo dua los ntawm kev sib txuas hydrogen ntawm cov pab pawg hydroxyl hauv nws cov qauv tshuaj thiab qhov chaw ntawm cov khoom. Hauv cov nplaum pobzeb thiab cov cement mortars, HPMC tuaj yeem tsim cov zaj duab xis sib txuas ntawm cov khoom thiab cov substrate. Cov zaj duab xis nplaum no tuaj yeem ua kom tiav cov qhov me me ntawm qhov chaw ntawm cov khoom thiab ua rau thaj chaw sib txuas ntau dua, yog li txhim kho lub zog sib txuas ntawm cov khoom thiab cov txheej hauv paus.
HPMC kuj muaj cov yam ntxwv zoo rau kev tsim cov zaj duab xis. Hauv cov ntaub ntawv thiab cov txheej txheem cement, HPMC tuaj yeem tsim cov zaj duab xis yooj ywm thaum lub sijhawm kho. Cov zaj duab xis no tuaj yeem txhim kho qhov sib koom ua ke thiab kev tiv thaiv shear ntawm cov khoom, yog li txhim kho qhov kev sib txuas ntawm cov khoom. Qhov tshwj xeeb no yog qhov tshwj xeeb tshaj yog rau cov chaw tsim kho hnyav xws li kub thiab noo noo, kom ntseeg tau tias cov khoom tuaj yeem tswj tau qhov kev ua tau zoo hauv ntau yam xwm txheej.
4. Lub luag haujlwm ntawm HPMC hauv kev txhim kho kev ua haujlwm
HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua cov khoom siv hauv tsev. Ua ntej, HPMC muaj peev xwm kho qhov sib xws thiab kev ntws ntawm cov khoom siv hauv tsev, ua rau lawv yooj yim dua rau kev tsim kho. Ntawm cov ntaub ntawv xws li cov nplaum pobzeb thiab hmoov putty, HPMC txhim kho kev ua haujlwm ntawm kev tsim kho los ntawm kev ua kom sib xws ntawm cov khoom siv thiab txo qhov sagging ntawm cov khoom siv.
Cov khoom siv khaws dej ntawm HPMC tuaj yeem ntev lub sijhawm qhib ntawm cov khoom siv. Qhov no txhais tau tias cov neeg ua haujlwm tsim kho muaj sijhawm ntau dua los kho thiab txiav tom qab siv cov khoom siv. Tshwj xeeb tshaj yog thaum tsim cov chaw loj lossis cov qauv nyuaj, lub sijhawm qhib ntev tuaj yeem txhim kho qhov yooj yim thiab qhov tseeb ntawm kev tsim kho.
HPMC kuj tseem tuaj yeem tiv thaiv kev tawg thiab teeb meem ntsws los ntawm cov ntaub ntawv qhuav sai dhau thaum lub sijhawm tsim kho los ntawm kev txo cov dej noo poob hauv cov ntaub ntawv. Qhov kev ua tau zoo no tseem ceeb heev rau cov ntaub ntawv gypsum thiab cov ntaub ntawv cement, vim tias cov ntaub ntawv no yooj yim ntsws thiab tawg thaum lub sijhawm ziab, cuam tshuam rau qhov zoo ntawm kev tsim kho thiab cov khoom tiav.
5. Lub luag haujlwm ntawm HPMC hauv kev tiv thaiv ib puag ncig thiab kev txhim kho kom ruaj khov
Nrog kev txhim kho ntawm kev paub txog ib puag ncig, kev lag luam kev tsim kho muaj cov kev cai siab dua rau kev ua haujlwm ib puag ncig ntawm cov ntaub ntawv. Raws li cov khoom siv ntuj tsis muaj tshuaj lom, tsis ua rau muaj kuab paug, HPMC ua tau raws li cov kev cai ntawm cov tsev ntsuab. Tsis tas li ntawd, HPMC tuaj yeem txhim kho kev tsim kho kom zoo ntawm cov ntaub ntawv thiab qhov zoo ntawm cov khoom tiav, txo cov khoom pov tseg thaum lub sijhawm tsim kho, thiab pab txo cov pa roj carbon ntawm kev lag luam kev tsim kho.
Ntawm cov ntaub ntawv ua los ntawm cov cement, HPMC cov khoom khaws dej tuaj yeem txo qhov ntau ntawm cov cement siv, yog li txo cov kev siv hluav taws xob thiab cov pa roj carbon dioxide thaum lub sijhawm tsim khoom. Hauv cov txheej txheem txheej, HPMC txo cov kev tso tawm ntawm VOC (cov organic compounds volatile) los ntawm nws cov khoom zoo heev thiab kev ruaj khov, ua tau raws li qhov xav tau ntawm cov txheej txheem ib puag ncig.
HPMC muaj ntau yam kev siv hauv kev lag luam kev tsim kho, pab cov neeg ua haujlwm tsim kho kom ua tiav cov txiaj ntsig zoo hauv ntau yam xwm txheej los ntawm kev txhim kho cov khoom siv lo thiab ua haujlwm tau zoo. HPMC tsis yog tsuas yog txhim kho lub zog sib txuas ntawm cov ntaub ntawv xws li cement mortar, vuas nplaum, cov khoom gypsum thiab hmoov putty, tab sis kuj txuas ntxiv lub sijhawm qhib ntawm cov ntaub ntawv thiab txhim kho kev yooj yim ntawm kev tsim kho. Tsis tas li ntawd, HPMC, ua cov khoom siv zoo rau ib puag ncig, pab txhawb kev txhim kho kev lag luam kev tsim kho kom ruaj khov. Yav tom ntej, nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, HPMC cov kev cia siab ntawm daim ntawv thov hauv kev lag luam kev tsim kho yuav dav dua, pab txhim kho cov thev naus laus zis kev tsim kho tas li.
Lub sijhawm tshaj tawm: Lub Kaum Hli-08-2024