Raws li ib qho tseem ceeb hauv tsev cov khoom siv ntxiv, ether ether yog dav siv nyob rau hauv kev tsim kho kev tsim kho, tshwj xeeb tshaj yog nyob rau hauv cov putties thiab txheej. Nws cov khoom tshwj xeeb thiab cov haujlwm tseem ceeb ua rau nws cov khoom siv tseem ceeb hauv kev txhim kho cov nplaum ntawm putty rau ntau yam nkaus. Cov haujlwm tseem ceeb ntawm cov neeg muaj kev pab cuam cellulose muaj cov tuab tuab, dej tuav, tshem tawm thiab txhim kho adhesion. Ntxiv cov cellulose ether rau cov mis muaj peev xwm txhim kho kev ua haujlwm ntawm kev ua haujlwm ntawm kev ua haujlwm ntawm lub putty thiab txhim kho nws cov nplaum rau lub substrate.
1. Cov yam ntxwv ntawm cellulose ether thiab mchchism ntawm Putty Action
Cellulose ether yog hom derivative ntawm ntuj cellulose tsim tau tom qab Methyl cellulose (MC), Hydroxyethyl cellulose (HEC), thiab lwm yam. Cellulose ether molecules muaj cov dej so zoo thiab thickening cov khoom, thiab tuaj yeem tsim ruaj khov colloidal cov kev daws teeb meem thaum sib xyaw nrog dej. Vim tias cellulose ether molecules muaj pawg hydrophilic, lawv solubanpilic, lawv cov solubanpicy txhim kho kev tsim kho kev ua haujlwm ntawm putty.
Qhov kev txiav txim mechanism ntawm cellulose ether hauv putty yog feem ntau xav hauv cov nram no:
Dej khaws cia: cellulose ether tuaj yeem ua ib qho khoom noj kom muaj zog nyob hauv cov mis ua kom zoo thiab tiv thaiv kom sai dua tom qab kev tsim kho. Qhov no tso cai rau kev faib cov dej noo huv uas yog thaum lub sijhawm ua kom qhuav, yog li txo cov putty tus nplaum rau lub substrate.
Thickening: cov nyhuv tuab ntawm cellulose ether tuaj yeem ua rau muaj kev sib xws ntawm cov putty kom nws yuav tsis sag lub ntsej muag lossis nthab. Cov yeeb yam no yog qhov tseem ceeb rau qhov tseem siv thiab tsim kev ua haujlwm ntawm putty.
Lubricity: Cellulose ether tuaj yeem txhim kho lubricity putty, ua kev tsim kho lub putty, ua kev tsim kho smoother, thiab yog li haum rau cov khoom siv hauv paus.
Anti-Sag: Cellulose ether muaj cov txiaj ntsig ntawm kev txhim kho cov nplaum ntawm kev tsim kho, thiab muaj peev xwm tswj hwm tau zoo txawm tias muaj kev siv huab cua siab. Cov nyhuv nplaum.
2. Cov nyhuv ntawm cellulose ether rau putty adhesion
Cov nplaum ntawm putty yog qhov tseem ceeb cuam tshuam rau nws cov nyhuv tsim tawm thiab kev pabcuam lub neej. Qhov kev sib ntxiv ntawm cellulose ether muab putty cov adhesion txuas ntxiv no:
Txhim kho cov wettability ntawm cov chaw seem txheej txheem: cellulose itthat nyob rau hauv cov putty thiab lub subtly dispersed ntawm lub plhaw ntub dej ntawm lub putty ntawm subtty. Cov nyhuv ntub kev txhim kho muaj peev xwm ntawm lub peev xwm, ua rau nws tau yooj yim rau kev nkag mus rau hauv cov quav me me ntawm cov txheej me me, txhim kho cov neeg kho tshuab nplaum.
Enhanced lub cev adhesion: khaws cov dej ua kom huv thiab siv cov txheej txheem ntawm cov txheej txheem uas tsis sib xws rau ntawm cov txheej txheem npog lub cev, yog li txhim kho lub cev adhesion ntawm lub putty. Txoj haujlwm no tsis tuaj yeem tiv thaiv cov putty los ntawm ntsws thaum lub sij hawm kho tus txheej txheem, tab sis kuj tiv thaiv kev tsim ntawm putty thiab cov khoom siv hauv paus, txhim kho cov nyhuv hauv tsev.
Txhim kho cov tawg tsis kam: ether ether tuaj yeem txhim kho cov khoom siv putty thiab av noo, yog li kev zam kev tawg. Qhov kev sib haum xeeb no tso cai rau kev ntxhov siab sab hauv tsim los ntawm kev ua kom qhuav thaum ua kom nqus tau thiab tawg, yog li kev txhim kho cov nplaum ntawm lub putty thiab substrate.
Txhim kho huab cua tiv thaiv: Vim tias cellulose muaj dej zoo heev thiab UV tsis kam thiab tuaj yeem tiv taus cov yaig ntawm sab nraud. Nyob rau hauv cov xwm txheej hnyav xws li kub thiab cov cua sov, cov evaporation tus nqi qeeb, kom ua kom muaj cov khoom nplaum ntawm lub putty.
3. Daim ntawv thov ntawm cellulose muaj kev ua kom muaj kev sib txawv
Txawv cov substrates muaj cov nplaum sib txawv kom muaj rau putty. Qhov kev sib ntxiv ntawm cellulose ether tuaj yeem txhim kho cov nplaum ntawm putty rau cov subtenty hauv qab no:
Maas cov khoom siv: qhov saum npoo ntawm cov huab ntxas phab ntsa yog ntxhib thiab muaj kev nqus tau. Cellulose ether tuaj yeem txhim kho cov nplaum ntawm cov nplaum rau cov yaum cov khoom siv thiab txhim kho cov nyhuv ntawm lub putty ntawm phab ntsa xis saum npoo.
Gypsum cov khoom siv: cov npoo ntawm Gypsum cov khoom siv yog tus ua kom zoo thiab dej-khaws cov khoom siv putty tuaj yeem tiv thaiv cov putty los ntawm kev poob tawm lossis tawg.
Ntoo substrate: ntoo muaj cov dej nqus dej muaj zog thiab shrinkage cov khoom. Qhov kev sib ntxiv ntawm cellulose ether tuaj yeem txhim kho qhov yooj thiab dej rov qab ntawm putty thiab tiv thaiv cov txheej pux thiab tiv thaiv kom poob vim yog ntoo deformation.
Hlau substrate: cov hlau saum npoo yog du thiab tsis yog-
Qhov kev sib ntxiv ntawm cellulose ether heev txhim kho cov nplaum ntawm cov zaub mov nplaum ntawm lub putty, ua rau nws haum rau ntau hom substrates. Los ntawm ntau lub zog xws li thickening, lubricalen, lubrication thiab txhim kho nws cov kev pabcuam lub neej thiab txo tus nqi kho. Yog li ntawd, cellulose cellulose ether tau dhau los ua qhov tseem ceeb ntxiv hauv kev tsim kho, muab cov khoom siv putty nrog muaj zog adhesion thiab ruaj khov.
Lub sijhawm Post: Feb-15-2025