Synthesis, cov yam ntxwv thiab kev ua haujlwm ntawm polycarboxylate superplasticizer nrog amide qauv
Nov 25, 2019
Cov lus tseem ceeb
Amide-PCE tau tsim kho ua tiav tau zoo thiab qhov kev pom tau pom tau pom zoo.
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Cov qauv ntawm amide-PCE thiab nws cov tshuaj tiv thaiv kom txaus txaus tau paub tseeb.
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Amide-PCE muaj kev thov zoo dua li cov PCE ib txwm muaj hauv kev ua vaj tse.
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Lub dispersion mechanism ntawm amide-PCE hauv cement – dej system tau ua duab qhia.
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Nws tuaj yeem muab cov roj teeb electrostatic rov ua kom tsis haum, ua kom tsis taus, ua kom yooj yim thiab muaj roj.
Abstract
Kev sib xyaw amide-qauv polycarboxylate superplasticizers (amide-PCEs) tau tsim los ntawm kev sib xyaw los ntawm cov tshuaj tiv thaiv kab mob polyacrylic acid (PAA) thiab amino-terminated methoxy polyethylene glycol (amino-PEG) nyob rau hauv txawv tej yam kev mob, thiab cov cuam tshuam ntawm amide-PCE&# {{5 s} tawm; s hluavtaws ntawm kev sib xyaw cov nqi thiab ntws kev ua tau zoo ntawm cov xis mas muab tshuaj xyuas tau tshawb xyuas. Fourier Transform Infrared Spectroscopy (FTIR), 1 H Nuclear Magnetic Resonance (1 H NMR), thiab cov ntsuas kev ntsuas molecular raug siv rau cov yam ntxwv ntawm tus qauv, thiab cov txiaj ntsig tau lees paub zoo tagnrho amide thiab txaus cov tshuaj tiv thaiv txaus. Amide-PCE nrog lub carboxyl – amino piv ntawm 4: 1 nthuav qhia qhov qis ntawm qhov chaw qis qis, feem pua adsorption zoo tshaj, thiab qhov zoo tshaj plaws tshuaj tau zoo tshaj tawm. Raws li cov txiaj ntsig saum toj no, cov dispersion thiab adsorption mechanisms ntawm amide-PCE hauv cov cement cement dej system tau sib tham. Daim ntawv thov kev ua yeeb yam hauv pob zeb ua kom pom tias amide-PCE tau zoo ib yam li cov PCE cov pa, tab sis kuj muaj cov peev txheej zoo dua rau huab cua, npuas tuav thiab ua vaj tse khov-tiv dua li cov ntawm PCE cov pa. Nyob ntawm tus qauv amide no thiab cov kev ua tau zoo, amide-PCE qhia cov kev cia siab rau kev thov.
Cov ntsiab lus
Cov Kws Kho Txhab; Polycarboxylate; Amide; cov qauv; Maas; Nthuav npaws
