Cellulose ethers yog ib chav kawm ntawm cov polymers uas yaj tau hauv dej uas muaj molecular hnyav heev uas tau los ntawm cellulose. Lawv tau siv dav hauv kev lag luam kev tsim kho ua cov khoom sib xyaw ua kom zoo rau cov khoom siv cement thiab gypsum. Ntawm lawv, hydroxypropyl methylcellulose (HPMC) yog ib qho ntawm cov cellulose ethers tseem ceeb tshaj plaws rau putty.
Ua ib lub chaw tsim khoom HPMC tshaj lij, peb yuav piav qhia rau koj txog lub luag haujlwm ntawm cellulose ether hauv putty. Peb vam tias tsab ntawv no muab qee qhov kev nkag siab zoo rau cov neeg txaus siab rau qhov kev kawm no.
1. Kev khaws dej
Ib qho ntawm cov haujlwm tseem ceeb ntawm cellulose ether rau putty yog khaws dej. Putty yog cov khoom siv zoo li nplaum siv los sau cov qhov sib txawv thiab cov kab nrib pleb hauv cov nto xws li phab ntsa, qab nthab thiab pem teb. Dej yog ib qho tseem ceeb hauv cov qauv putty vim nws pab yaj cov khoom xyaw thiab muab kev ua haujlwm tau. Txawm li cas los xij, dej ntau dhau tuaj yeem ua rau putty qhuav thiab ntsws sai, ua rau tawg thiab ua tiav tsis zoo.
Cellulose ether, tshwj xeeb tshaj yog HPMC, tsim cov qauv zoo li gel thaum sib xyaw nrog dej, uas tuaj yeem txhim kho kev khaws dej ntawm putty. Cov pab pawg hydrophilic ntawm HPMC tuaj yeem nqus cov dej molecules thiab tiv thaiv lawv kom tsis txhob evaporate sai dhau. Qhov no tso cai rau lub sijhawm ua haujlwm ntev dua thiab cov qauv putty sib xws dua.
2. Txhim kho kev ua haujlwm tau zoo
Lwm lub luag haujlwm tseem ceeb ntawm cellulose ether rau putty yog los txhim kho nws txoj haujlwm. Kev ua haujlwm txhais tau tias qhov yooj yim uas cov putty tau thov thiab pwm kom tau txais qhov chaw du. Cellulose ether tuaj yeem txhim kho qhov fluidity thiab kis tau ntawm putty los ntawm kev txo qhov sib txhuam ntawm cov khoom me me thiab ua kom lubrication ntawm lub kaw lus.
Qhov ntxiv ntawm cellulose ethers rau hauv putties kuj txo cov pa uas tshwm sim los ntawm kev sib tov, uas tuaj yeem ua rau cov nplaim tsis sib npaug thiab tsis nplaum zoo. Kev siv cellulose ethers txhim kho qhov du thiab sib xws ntawm putty, ua rau muaj kev ua tau zoo dua thiab ua tiav zoo nkauj dua.
3. Ua kom muaj kev sib txuas ntxiv
Lwm qhov txiaj ntsig ntawm cellulose ether rau putty yog kev nplaum ntau dua. Putties yog siv los sau cov qhov sib txawv thiab cov kab nrib pleb, nrog rau tsim kom muaj qhov chaw du rau cov xim lossis lwm yam tiav. Yog li ntawd, cov putty yuav tsum muaj peev xwm lo rau lub substrate thiab muab kev sib txuas zoo.
Cellulose ether, tshwj xeeb tshaj yog HPMC, tuaj yeem txhim kho qhov kev sib txuas ntawm putty los ntawm kev tsim ib zaj duab xis rau ntawm qhov chaw ntawm lub substrate. Zaj duab xis ua kom muaj kev sib cuag ntawm putty thiab lub substrate thiab pab sau cov qhov tsis sib xws ntawm qhov chaw. Qhov no ua rau muaj kev sib txuas zoo dua thiab ua tiav zoo dua.
4. Txo qhov ntsws
Qhov ntswg yog ib qho teeb meem uas feem ntau tshwm sim nrog cov putty, vim nws tuaj yeem ua rau tawg thiab ua tiav tsis zoo. Cellulose ethers tuaj yeem pab txo qhov ntswg putty los ntawm kev txhim kho qhov khaws dej thiab ua haujlwm tau ntawm cov putty. Dej ua pa qeeb dua, muab cov putty cov qauv du uas pab tiv thaiv cov kab nrib pleb thiab cov kab nrib pleb los ntawm kev tsim thaum lub sijhawm ziab.
Tsis tas li ntawd xwb, cellulose ether kuj tseem tuaj yeem txo qhov kev ntswj ntawm cov yas ntawm cov putty, uas yog, qhov kev ntswj uas tshwm sim thaum lub sijhawm teeb tsa thawj zaug. Cov khoom no yog qhov tseem ceeb tshwj xeeb rau cov putties teeb tsa sai, vim nws pab tswj kev ncaj ncees ntawm qhov chaw thiab tiv thaiv kev tsim cov kab nrib pleb.
5. Txhim kho kev ruaj khov
Thaum kawg, cellulose ethers tuaj yeem txhim kho qhov ruaj khov ntawm putty los ntawm kev txhim kho nws txoj kev tiv thaiv rau cov yam ntxwv ib puag ncig xws li kev hloov pauv kub, av noo thiab kev puas tsuaj. Cov khoom tsim zaj duab xis ntawm cellulose ether tuaj yeem muab kev tiv thaiv rau ntawm qhov chaw putty kom tiv thaiv kev nkag mus ntawm dej thiab lwm yam kuab paug.
Ntxiv mus, cellulose ether kuj tseem tuaj yeem txhim kho lub zog flexural thiab kev cuam tshuam ntawm cov putty, ua rau nws tiv taus kev tawg thiab chipping. Cov cuab yeej no yog qhov tseem ceeb rau cov ntawv thov uas cov putties feem ntau raug tuav lossis cuam tshuam, xws li hauv kev kho lossis kev kho kom zoo nkauj.
xaus lus
Xaus lus, cellulose ethers, tshwj xeeb tshaj yog HPMC, yog cov khoom siv tseem ceeb rau kev ua kom cov putty zoo dua. Lawv cov haujlwm suav nrog kev khaws dej, kev ua haujlwm zoo dua, kev sib txuas ntxiv, txo qhov ntsws thiab kev ua haujlwm ntev dua. Kev siv cellulose ethers pab txhim kho qhov zoo thiab kev ua haujlwm ntawm cov putty, ua rau muaj qhov tiav zoo dua thiab lub neej ntev dua. Ua tus kws tshaj lij HPMC chaw tsim khoom, peb cog lus tias yuav muab cov neeg siv khoom nrog cov cellulose ether zoo thiab kev txhawb nqa kev siv tshuab.
Lub sijhawm tshaj tawm: Lub Xya Hli-20-2023