HPMC txhim kho adhesion thiab ua haujlwm tau zoo hauv kev tsim kho kev lag luam
HPMC (Hydroxypropyl Methylcellulose) yog ib qho kev ua haujlwm siab ua kom tuab thiab nplaum feem ntau siv hauv kev tsim kho kev lag luam. Nws ua lub luag haujlwm tseem ceeb hauv kev txhim kho adhesion thiab ua haujlwm tau zoo hauv cov khoom siv hauv tsev.
1. Cov khoom siv tshuaj lom neeg thiab kev ua haujlwm ntawm HPMC
HPMC yog cov dej-soluble cellulose ether uas nws cov qauv muaj cov pob txha cellulose thiab methyl thiab hydroxypropyl pawg. Vim tias muaj cov khoom hloov pauv no, HPMC muaj cov khoom zoo solubility, thickening, film-forming thiab adhesive zog. Tsis tas li ntawd, HPMC tuaj yeem muab cov dej noo zoo dua thiab lubrication, ua rau nws siv dav hauv cov khoom siv hauv tsev.
2. Kev siv HPMC hauv cov khoom siv hauv tsev
Hauv kev tsim kho kev lag luam, HPMC tau siv dav hauv cov khoom siv cement, gypsum khoom, putty hmoov, coatings thiab lwm yam khoom siv hauv tsev. Nws lub luag haujlwm tseem ceeb yog los kho qhov sib xws ntawm cov khoom siv, txhim kho qhov fluidity ntawm cov khoom, txhim kho cov adhesion ntawm cov khoom thiab txuas ntxiv lub sijhawm qhib ntawm cov khoom. Cov hauv qab no yog cov ntawv thov thiab kev ua haujlwm ntawm HPMC hauv cov khoom siv sib txawv:
ib. Cov khoom siv cement
Hauv cov khoom siv cement xws li cov cement mortars thiab cov nplais nplaum, HPMC tuaj yeem txhim kho cov khoom siv los tiv thaiv kev ua haujlwm zoo thiab tiv thaiv cov khoom los ntawm kev zawv zawg thaum siv. Tsis tas li ntawd, HPMC tuaj yeem txhim kho cov dej khaws cia ntawm cov cement mortar thiab txo cov dej evaporation hauv cov mortar, yog li txhim kho nws txoj kev sib raug zoo. Hauv cov nplais pobzeb nplaum, qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho qhov adhesion ntawm cov khoom siv yav dhau los thiab cov nplais pobzeb saum npoo thiab zam qhov teeb meem ntawm hollowing lossis poob ntawm cov vuas ceramic.
b. Gypsum khoom
Ntawm cov khoom siv gypsum, HPMC muaj peev xwm tuav tau dej zoo heev, uas tuaj yeem txo cov dej poob thaum tsim kho thiab xyuas kom meej tias cov khoom tseem noo txaus thaum kho. Cov cuab yeej no pab ua kom lub zog thiab ruaj khov ntawm cov khoom siv gypsum thaum tseem txuas ntxiv lub sijhawm cov khoom siv tuaj yeem ua haujlwm, muab cov neeg ua haujlwm tsim kho ntau lub sijhawm los hloov kho thiab ua tiav.
c. Putty hmoov
Putty hmoov yog ib yam khoom tseem ceeb rau lub tsev nto leveling. Kev thov ntawm HPMC hauv cov hmoov putty tuaj yeem txhim kho nws txoj kev tsim kho. HPMC tuaj yeem nce qhov sib xws ntawm cov hmoov putty, ua kom yooj yim rau kev thov thiab qib. Nws tseem tuaj yeem txhim kho qhov adhesion ntawm putty thiab lub hauv paus txheej los tiv thaiv cov txheej putty los ntawm kev tawg lossis poob tawm. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov kev ua haujlwm ntawm cov hmoov txhuam hniav kom ntseeg tau tias cov khoom yuav tsis sag los yog plam thaum siv.
d. Coatings thiab xim
Daim ntawv thov ntawm HPMC nyob rau hauv cov txheej txheem thiab cov xim yog feem ntau pom nyob rau hauv nws thickening thiab stabilizing teebmeem. Los ntawm kev kho qhov sib xws ntawm cov xim, HPMC tuaj yeem txhim kho qib thiab ua haujlwm ntawm cov xim thiab tiv thaiv sagging. Tsis tas li ntawd, HPMC tseem tuaj yeem txhim kho cov dej tuav ntawm cov txheej txheem, ua kom cov txheej txheem txheej txheej txheej txheej txheej thaum lub sij hawm ziab, thiab txhim kho cov adhesion thiab tawg tsis kam ntawm cov txheej txheem txheej.
3. Lub tshuab ntawm HPMC los txhim kho adhesion
HPMC txhim kho cov adhesion ntawm cov khoom los ntawm hydrogen bonding ntawm hydroxyl pawg nyob rau hauv nws cov qauv tshuaj thiab cov nto ntawm cov khoom. Hauv cov nplais nplaum thiab cov cement mortars, HPMC tuaj yeem tsim cov yeeb yaj kiab sib txuam ntawm cov khoom siv thiab cov substrate. Cov zaj duab xis nplaum no tuaj yeem ua tau zoo sau cov pores me me ntawm cov khoom siv thiab ua rau thaj chaw sib koom ua ke, yog li txhim kho lub zog sib txuas ntawm cov khoom thiab cov txheej txheem.
HPMC kuj muaj cov khoom ua yeeb yaj kiab zoo. Hauv cov ntaub ntawv cement-based thiab txheej txheej, HPMC tuaj yeem tsim cov yeeb yaj kiab hloov tau thaum lub sijhawm kho. Cov yeeb yaj kiab no tuaj yeem txhim kho cov cohesion thiab shear tsis kam ntawm cov khoom, yog li txhim kho tag nrho cov adhesion ntawm cov khoom. Cov yam ntxwv no tshwj xeeb tshaj yog tsim rau cov chaw tsim kho huab cua xws li qhov kub thiab txias thiab cov av noo siab, kom ntseeg tau tias cov khoom tuaj yeem tswj xyuas kev sib raug zoo hauv ntau yam kev mob.
4. Lub luag haujlwm ntawm HPMC hauv kev txhim kho kev ua haujlwm
HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov txheej txheem ntawm cov khoom siv hauv tsev. Ua ntej, HPMC tuaj yeem kho qhov sib xws thiab fluidity ntawm cov khoom siv hauv tsev, ua kom yooj yim rau kev tsim kho. Ntawm cov ntaub ntawv xws li pobzeb nplaum thiab cov hmoov putty, HPMC txhim kho kev ua haujlwm ntawm kev tsim kho los ntawm kev ua kom cov khoom sib xws thiab txo cov sagging ntawm cov khoom.
Cov khoom tuav dej ntawm HPMC tuaj yeem txuas ntxiv lub sijhawm qhib ntawm cov khoom siv. Qhov no txhais tau hais tias cov neeg ua haujlwm tsim kho muaj sijhawm ntau los kho thiab txiav tom qab siv cov khoom siv. Tshwj xeeb tshaj yog thaum tsim cov cheeb tsam loj lossis cov txheej txheem nyuaj, 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 los ntawm cov ntaub ntawv ziab sai heev thaum lub sij hawm tsim kho los ntawm kev txo cov dej noo hauv cov khoom. Qhov kev ua tau zoo no yog qhov tseem ceeb tshwj xeeb hauv cov khoom siv gypsum thiab cov khoom siv cement, vim tias cov ntaub ntawv no yog qhov ua rau shrinkage thiab tawg thaum lub sij hawm ziab, cuam tshuam rau kev tsim kho thiab cov khoom tiav.
5. Lub luag haujlwm ntawm HPMC hauv kev tiv thaiv ib puag ncig thiab kev tsim kho kom ruaj khov
Nrog rau kev txhim kho ntawm ib puag ncig kev paub, kev tsim kho kev lag luam tau nce siab dua cov kev xav tau rau ib puag ncig kev ua haujlwm ntawm cov ntaub ntawv. Raws li cov khoom tsis muaj tshuaj lom, tsis muaj kuab lom, HPMC ua tau raws li cov kev cai ntawm cov vaj tsev ntsuab. Tsis tas li ntawd, HPMC tuaj yeem txhim kho kev tsim kho ntawm cov khoom siv thiab cov khoom tiav zoo, txo cov khoom pov tseg thaum lub sij hawm tsim kho, thiab pab txo cov pa roj carbon hneev taw ntawm kev tsim kho kev lag luam.
Ntawm cov ntaub ntawv cement-based, HPMC cov khoom khaws dej tuaj yeem txo cov cement siv, yog li txo qis kev siv hluav taws xob thiab carbon dioxide emissions thaum lub sij hawm tsim khoom. Hauv cov txheej txheem, HPMC txo cov kev tso tawm ntawm VOC (volatile organic compounds) los ntawm nws cov yeeb yaj kiab zoo tshaj plaws thiab kev ruaj ntseg, ua tau raws li qhov yuav tsum tau ua ntawm cov txheej txheem ib puag ncig.
HPMC muaj ntau yam kev siv hauv kev tsim kho kev lag luam, pab cov neeg ua haujlwm tsim kho kom ua tiav cov txiaj ntsig kev tsim kho tau zoo nyob rau hauv ntau yam kev mob los ntawm kev txhim kho cov khoom adhesion thiab ua haujlwm tau zoo. HPMC tsis tuaj yeem txhim kho lub zog sib txuas ntawm cov ntaub ntawv xws li cement mortar, pobzeb adhesives, gypsum khoom thiab putty hmoov, tab sis kuj txuas ntxiv lub sijhawm qhib ntawm cov ntaub ntawv thiab txhim kho kev tsim kho yooj yim. Tsis tas li ntawd, HPMC, raws li ib puag ncig tus phooj ywg cov ntaub ntawv, pab txhawb txoj kev loj hlob ntawm kev tsim kho kev lag luam. Nyob rau yav tom ntej, nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, HPMC daim ntawv thov kev cia siab hauv kev tsim kho kev lag luam yuav nthuav dav, pab txhim kho kev tsim kho tsis tu ncua.
Post lub sij hawm: Oct-08-2024