HPMC txhim kho adhesion thiab kev ua haujlwm hauv kev tsim kho kev tsim kho
HPMC (HydroxyPropyyl methylulose) yog qhov kev ua tau zoo thickener thiab nplaum feem ntau siv hauv kev tsim kho. Nws plays lub luag haujlwm tseem ceeb hauv kev txhim kho adhesion thiab kev ua haujlwm hauv cov ntaub ntawv hauv tsev.
1. Tshuaj lom neeg thiab cov haujlwm ntawm HPMC
HPMC yog cov dej-soluble cellulose uas nws cov qauv muaj cov qauv cellulose thiab methyl thiab hydroxypropropyl pawg. Vim tias muaj cov neeg muaj cov chaw nyob ntawd, HPMC muaj cov solubility zoo, thickening, zaj duab xis-tsim thiab nplaum zog. Ib qho ntxiv, HPMC tuaj yeem muab cov dej noo zoo dua qub thiab lub roj, ua rau nws dav siv hauv cov ntaub ntawv hauv tsev.
2. Daim ntawv thov ntawm HPMC hauv cov ntaub ntawv tsim tsev
Hauv kev tsim kho kev tsim kho, HPMC tau siv dav hauv kev tso cai hauv cov khoom noj, gypsum, muab cov hmoov, pleev xim thiab lwm yam khoom siv hauv tsev. Nws lub ntsiab muaj nuj nqi yog los kho qhov sib xws ntawm cov khoom siv, txhim kho cov flucity ntawm cov khoom, txhim kho cov nplaum ntawm cov khoom siv ntawm cov khoom siv. Cov hauv qab no yog cov ntawv thov thiab kev ua haujlwm ntawm HPMC hauv cov khoom sib txawv hauv tsev:
a. Cov Khoom Siv Cement-based
Nyob rau hauv cov paj ntaub ntawv ua ke xws li Caas Mortars thiab cov nplaum nplaum, HPMC tuaj yeem txhim kho cov khoom siv los tiv thaiv kev ua haujlwm ntawm kev tsim kho. Tsis tas li ntawd, HPMC tseem tuaj yeem txhim kho cov dej sib khi ntawm xis mas cug thiab txo dej evaporation hauv lub tshuaj khib, yog li txhim kho nws txoj kev sib raug zoo zog. Hauv cov ceramic pobzeb cov nplaum, ntxiv rau HPMC tuaj yeem txhim kho cov nplaum ntawm cov khoom sib xyaw thiab cov teeb meem ceramic cov teeb meem thiab poob tawm ntawm cov vuas luaj ceramic.
b. Gypsum khoom
Ntawm cov khoom siv gypsum, HPMC muaj cov dej ua haujlwm zoo thaum lub sijhawm kev tsim kho kom txo qis, uas cov khoom tseem muaj dej txaus thaum lub sijhawm kho. Cov cuab yeej no pab kom muaj zog thiab cov khoom siv ua kom zoo ntxiv thaum tseem tuaj yeem ua haujlwm rau, muab cov neeg ua haujlwm pabcuam ntxiv los hloov kho thiab ua tiav.
c. Putty hmoov
Putty Hmoov yog ib qho khoom tseem ceeb rau kev tsim theem qib theem. Daim ntawv thov ntawm HPMC hauv cov hmoov Putty tuaj yeem txhim kho nws cov kev tsim kho kev tsim kho. HPMC tuaj yeem nce qhov sib xws ntawm cov hmoov putty, ua rau nws yooj yim rau kev thov thiab qib. Nws tseem tuaj yeem txhim kho cov nplaum ntawm lub putty thiab lub hauv paus txheej los tiv thaiv cov putty txheej los ntawm kev tawg lossis poob tawm. Tsis tas li ntawd, HPMC tseem tuaj yeem txhim kho cov kev ua tau zoo los ntawm putty ntawm putty hmoov kom ntseeg tau tias cov khoom yuav tsis sag lossis plam thaum lub sijhawm kev tsim kho.
d. Tsho thiab xim av
Daim ntawv thov ntawm HPMC nyob rau hauv cov txheej xim thiab cov xim tha xim yog mas muaj kev cuam tshuam hauv nws cov teebmeem thickening thiab ruaj khov. Los ntawm kev kho cov xim sib txawv, HPMC tuaj yeem txhim kho kev ua haujlwm leveling thiab ua haujlwm ntawm cov xim thiab tiv thaiv sagging. Tsis tas li ntawd, HPMC tseem tuaj yeem txhim kho cov dej khaws cia ntawm cov txheej txheej, ua kom cov txheej txheem ua kom qhuav, thiab txhim kho cov nplaum thiab tawg ntawm cov yeeb yaj kiab txheej.
3. Tus txheej txheem ntawm HPMC los txhim kho adhesion
HPMC txhim kho cov nplaum ntawm cov khoom siv los ntawm hydrogen sib khi ntawm cov pawg hydroxyl hauv nws cov qauv tshuaj thiab cov khoom siv. Nyob rau hauv cov nplais nplaum thiab Caas Mysars, HPMC tuaj yeem tsim cov zaj duab sib dhos ntawm cov khoom siv thiab cov substrate. Zaj lus nplaum no tuaj yeem sau cov me me pores ntawm cov khoom siv thiab nce thaj tsam ua kom muaj zog ntawm cov khoom siv thiab txheej txheej.
HPMC kuj muaj cov yeeb yaj kiab zoo-tsim cov khoom. Hauv cov ntawv tso cai ua ke thiab txheej txheej, HPMC tuaj yeem tsim zaj duab xis hloov tau thaum lub sijhawm kho. Zaj yeeb yaj kiab no tuaj yeem txhim kho cov cohesion thiab shear tiv thaiv ntawm cov khoom, yog li kev txhim kho cov nplaum ntawm cov khoom siv. Cov yam ntxwv no tshwj xeeb tshaj yog tsim nyog rau ib puag ncig kev tsim kho xws li cov cua sov thiab siab noo, kom muaj kev sib raug zoo nyob rau ntau qhov kev mob.
4. Lub luag haujlwm ntawm HPMC hauv kev txhim kho cov txheej txheem
HPMC ua si lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom siv hauv tsev. Ua ntej, HPMC muaj peev xwm los kho qhov xwm yeem thiab lub cev ntawm cov ntaub ntawv tsim tsev, ua rau lawv tsim tau. Ntawm cov ntaub ntawv xws li cov hmoov av nplaum thiab cov hmoov ua kom muaj zog, hpmc txhim kho cov kev ua haujlwm ntawm kev nce qib ntawm cov khoom siv thiab txo cov sagging ntawm cov khoom.
Cov khoom siv dej khaws cia ntawm HPMC tuaj yeem txuas ntxiv lub sijhawm qhib ntawm cov khoom siv. Qhov no txhais tau tias cov neeg ua haujlwm tsim kho muaj sijhawm ntau los kho thiab txiav tom qab cov khoom siv tau thov. Tshwj xeeb tshaj yog thaum tsim cov chaw loj lossis cov txheej txheem sib txawv, lub sijhawm qhib txuas ntxiv tuaj yeem txhim kho qhov yooj yim thiab raug ntawm kev tsim kho.
HPMC kuj tseem tuaj yeem tiv thaiv cov teeb meem tawg thiab shrinkage tshwm sim los ntawm cov ntaub ntawv kom qhuav sai dhau thaum kev tsim kho los ntawm kev txo cov dej noo nyob hauv cov khoom. Qhov kev ua tau zoo no tshwj xeeb yog nyob rau hauv Gypsum-based cov ntaub ntawv thiab cov ntaub ntawv tso cai, vim tias cov ntaub ntawv tso ua kom huv, cuam tshuam rau cov khoom siv kom qhuav thiab cov khoom tiav 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 ib puag ncig, kev tsim kho kev tsim kho tau nce zuj zus rau kev ua haujlwm ib puag ncig ntawm cov ntaub ntawv. Raws li cov tsis muaj tshuaj lom, tsis muaj kuab paug khoom siv, HPMC ua tau raws li cov kev xav tau ntawm cov tsev ntsuab. Tsis tas li ntawd, HPMC tuaj yeem txhim kho cov khoom siv ua tau zoo thiab cov khoom lag luam uas ua tiav, thiab pab txo cov qauv ntsuas pa ntawm kev tsim kho kev tsim kho.
Ntawm cov khoom siv casent-raws li, HPMC cov dej-khaws cov khoom tuaj yeem txo cov movent ntawm kev siv cov pa hluav taws thiab cov pa roj carbon dioxide thaum cov txheej txheem ntau lawm. Hauv cov tsho tiv no, HPMC txo qhov kev tso tawm ntawm VOC (volatile organic sib xyaw ua ke thiab ruaj khov ua yeeb yaj kiab zoo nkauj thiab ruaj khov, sib tham txog cov cai ntawm kev ua phooj ywg zoo.
HPMC muaj ntau cov kev siv hauv kev tsim kho, pab cov kws kho mob ua tiav cov txiaj ntsig zoo los ntawm kev txhim kho cov khoom nplaum thiab kev ua haujlwm. HPMC tsis tuaj yeem tsuas yog txhim kho lub zog ntawm lub zog ntawm cov khoom siv xws li cov hmoov av xis, tab sis kuj txuas lub sijhawm qhib thiab txhim kho kev siv khoom siv. Ib qho ntxiv, HPMC, ua cov khoom siv ib puag ncig, pab txhawb kev txhim kho kom muaj kev txhim kho kom muaj kev tsim kho. Nyob rau hauv lub neej yav tom ntej, nrog kev nce qib ntawm science thiab thev naus laus zis, HPMC cov ntawv thov kev pabcuam hauv kev tsim kho kev tsim kho yuav yog dav dav, pab txuas ntxiv txhim kho kev siv thev naus laus zis.
Lub Sijhawm Post: Oct-08-2024