Cellulose ether (CE) yog ib qho kev ua haujlwm zoo ntawm cov khoom siv polymer uas tau txais los ntawm kev hloov kho tshuaj ntawm ntuj cellulose. Nws yog dav siv hauv pobzeb adhesives hauv cov khoom siv hauv tsev. Nws cov qauv tshuaj tshwj xeeb thiab cov khoom siv lub cev ua rau nws muaj txiaj ntsig zoo hauv kev txhim kho kev ua haujlwm ntawm cov nplais nplaum.
1. Thickening thiab suspension zog
Cellulose ether feem ntau ua raws li cov thickener hauv cov nplais nplaum. Nws tuaj yeem ua rau kom muaj viscosity thiab sib xws ntawm lub kaw lus, yog li optimizing kev tsim kho thiab kev ua haujlwm ntawm cov nplaum. Los ntawm kev ua kom cov viscosity ntawm cov nplaum, cellulose ether tuaj yeem tshem tawm cov khoom zoo thiab tiv thaiv colloids los ntawm stratification thiab nag lossis daus thaum khaws lossis siv.
Cov nyhuv Thickening: Cellulose ether tuaj yeem tsim cov qauv sib txuas hauv cov kua dej, encapsulate thiab tshem tawm cov cement hais, thiab ua rau lub cev muaj viscosity ntau dua. Cov cuab yeej no pab tiv thaiv kom tsis txhob ntog ntawm cov nplais nplaum nplaum thaum tsim kho ntawm qhov chaw ntsug.
Kev ncua kev ruaj ntseg: Los ntawm qhov sib npaug ntawm cov khoom sib cais hauv cov kua nplaum, cov cellulose ethers tso cai rau cov nplais nplaum kom nyob twj ywm tsis tu ncua thaum sawv ntsug, yog li ua kom muaj kev ua haujlwm zoo thiab lub zog kawg.
2. Kev tuav dej
Kev tuav dej yog ib qho ntawm cov haujlwm tseem ceeb ntawm cellulose ethers. Nws tuaj yeem nqus tau cov dej ntau hauv cov nplais nplaum, cia cov dej tso tawm maj mam. Qhov kev ua haujlwm no yog qhov tseem ceeb rau cov dej tshuaj tiv thaiv ntawm cov ntaub ntawv cement-based thiab cuam tshuam ncaj qha rau cov txheej txheem kho thiab cov khoom sib txuas ntawm cov nplais nplaum.
Kev txhawb nqa dej dej: Cov dej tuav ntawm cellulose ethers kom ntseeg tau tias cov cement muaj dej txaus rau hydration thaum lub sij hawm hardening txheej txheem, uas yog ib qho tseem ceeb rau kev txhim kho lub zog thiab kev sib txuas cov khoom ntawm cov nplaum.
Lub sijhawm qhib: Vim tias cov dej tuav tau nce lub sijhawm muaj dej noo ntawm cov nplaum nplaum, cov neeg ua haujlwm tsim kho muaj sijhawm ntau dua los kho thiab ua haujlwm, yog li txhim kho kev tsim kho.
3. Txhim kho rheological zog
Cellulose ethers muaj qhov cuam tshuam tseem ceeb ntawm cov khoom rheological ntawm cov nplais nplaum. Rheology hais txog qhov ntws thiab deformation yam ntxwv ntawm cov khoom nyob rau hauv kev ntxhov siab. Cellulose ethers tuaj yeem kho qhov kev ntxhov siab thiab thixotropy ntawm cov nplaum, yog li txhim kho nws txoj haujlwm.
Kev tswj kev ntxhov siab: Cellulose ethers tuaj yeem tsim muaj lub zog muaj zog hauv cov nplaum, yog li yuav tsum muaj qee qhov sab nraud quab yuam kom pib lub colloid ntws. Qhov no pab tiv thaiv cov nplaum los ntawm sagging los yog slipping thaum lub sij hawm tsim kho.
Thixotropy kev txhim kho: Cellulose ethers ua rau cov pobzeb nplaum ua kom pom cov viscosity siab dua thaum nyob ruaj ruaj, tab sis cov viscosity poob sai sai nyob rau hauv qhov kev txiav txim ntawm shear force, ua kom yooj yim rau kev sib kis thiab sib kis thaum tsim kho. Tom qab kev tsim kho tiav, cov viscosity tau rov qab los, uas yuav pab kom cov vuas nyob hauv qhov chaw.
4. Txhim kho kev ua haujlwm tiv thaiv sag
Thaum txhim kho cov vuas rau ntawm qhov chaw ntsug lossis inclined, tiv thaiv cov nplaum los ntawm kev swb yog qhov teeb meem tseem ceeb. Cellulose ethers zoo txhim kho cov kev ua haujlwm ntawm cov nplaum nplaum los ntawm lawv cov thickening thiab rheology hloov ua haujlwm, tso cai rau cov colloid kom ruaj khov kho cov vuas thaum lub sij hawm siv ntsug.
Sag tswj: Cellulose ethers tuaj yeem tsim cov qauv gel nrog kev sib koom ua ke siab, uas ua rau cov nplaum nplaum muaj kev ntxhov siab ntau dua rau ntawm qhov chaw ntsug, yog li tiv thaiv cov vuas los ntawm zawv zawg.
5. Txhim khu kev ruaj ntseg
Cellulose ethers ua lub luag haujlwm tseem ceeb hauv kev txhim kho lub zog ntawm cov nplaum nplaum. Nws cov dej tuav thiab rheological tswj cov khoom ua kom cov pobzeb nplaum kom zoo dua nkag rau ntawm cov vuas thiab substrates, yog li txhim kho adhesion.
Kev ua haujlwm ntub dej: Cellulose ethers kho cov kua nplaum ntawm cov nplaum ua kom lawv nkag tau zoo dua thiab ua raws li cov vuas thiab cov substrates, ua rau thaj chaw sib txuas, thiab txhim kho kev sib raug zoo.
Txhim kho uniformity: Vim lub thickening nyhuv ntawm cellulose ethers, cov nplaum cov khoom sib npaug sib npaug, txo qhov teeb meem ntawm lub zog tsis sib xws los ntawm cov khoom siv hauv zos sedimentation.
6. Tiv thaiv kev tawg
Cov pobzeb nplaum yog qhov ua rau shrinkage thiab tawg vim dej poob thaum lub sij hawm ziab thiab hardening txheej txheem. Cov dej tuav cov khoom ntawm cellulose ethers tuaj yeem ua kom cov dej poob qis, txo qis kom qhuav, thiab tiv thaiv kev tawg.
Drying shrinkage tswj: Los ntawm kev tswj tus nqi ntawm cov dej tso tawm, cellulose ethers tuaj yeem txo qhov shrinkage ntawm cov nplaum thaum lub sij hawm ziab, yog li txo qhov kev pheej hmoo ntawm kev tawg.
7. Txhim kho huab cua tsis kam thiab kav ntev
Cellulose ethers tuaj yeem txhim kho huab cua tsis kam thiab ua haujlwm ntev ntawm cov nplais nplaum. Nws muaj kev ruaj ntseg siab hauv lub xeev ntub dej tuaj yeem txhim kho kev ua haujlwm ntawm cov nplaum hauv qhov chaw ntub dej thiab txhim kho kev tiv thaiv kev laus.
Moisture resistance: Cellulose ethers tseem tuaj yeem tswj hwm lawv cov dej num hauv qhov chaw ntub dej, uas pab cov nplais nplaum kom tswj tau lub sij hawm ntev adhesion nyob rau hauv cov huab cua ntub.
Los tiv thaiv kev laus: Cellulose ethers txhim kho lub sijhawm ntev ntawm cov nplaum nplaum los ntawm kev tiv thaiv cementitious substrates los ntawm kev ya raws sai thiab kev yaig ib puag ncig.
8. Ecological kev nyab xeeb
Cellulose ethers yog muab los ntawm ntuj cellulose thiab yog tsim los ntawm kev hloov tshuaj. Lawv muaj biodegradability zoo thiab ib puag ncig tus phooj ywg. Nyob rau hauv cov ntsiab lus ntawm niaj hnub cov ntaub ntawv hauv tsev uas nce siab rau kev tiv thaiv ib puag ncig thiab kev txhim kho kom ruaj khov, cellulose ethers muaj qhov zoo tshaj plaws raws li kev nyab xeeb thiab muaj txiaj ntsig zoo.
Kev siv cov cellulose ethers hauv cov nplais nplaum yog tus yuam sij rau kev txhim kho lawv cov kev ua tau zoo. Nws cov thickening, dej tuav, rheology hloov kho, los tiv thaiv sagging, txhim khu kev sib txuas, thiab kev tiv thaiv tawg ua rau txhim kho kev tsim kho thiab cov txiaj ntsig kawg ntawm cov nplais nplaum. Nyob rau tib lub sijhawm, ecological kev nyab xeeb ntawm cellulose ethers kuj ua tau raws li kev tiv thaiv ib puag ncig ntawm cov khoom siv hauv tsev niaj hnub. Raws li ib qho tseem ceeb ua haujlwm ntxiv, cellulose ethers yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv kev tsim cov nplaum nplaum, pab txhim kho cov pobzeb paving kom zoo thiab ruaj khov.
Post lub sij hawm: Jun-21-2024