Cov hmoov txhuv nplej siab ethersyog cov polymer derivatives uas yaj tau hauv dej uas ua los ntawm cov hmoov txhuv nplej ntuj los ntawm kev hloov kho tshuaj lom neeg lossis lub cev. Lawv feem ntau yog siv rau hauv kev tsim kho ua cov khoom ntxiv kom khaws dej, ua kom tuab, txhim kho kev ua haujlwm, thiab txhim kho cov khoom rheological ntawm cov ntaub ntawv. Lawv feem ntau yog los ntawm cov hmoov txhuv nplej cog xws li pob kws, qos yaj ywm, thiab cassava. Cov pab pawg ether tau qhia los ntawm kev sib xyaw ua ke, hloov pauv lawv cov solubility, kev ruaj khov, thiab cov khoom tuab, ua rau lawv ua haujlwm hauv cov chaw alkaline thiab cov kab ke nyuaj.
Hauv kev lag luam kev tsim kho, cov hmoov txhuv nplej siab feem ntau siv rau hauv cov txheej txheem sib xyaw qhuav xws li cov nplaum pobzeb, cov hmoov putty sab hauv thiab sab nraud phab ntsa, cov tshuaj rwb thaiv tsev, thiab cov ntaub ntawv gypsum lossis cement-based self-leveling. Lawv siv feem ntau yog qis heev, feem ntau ntawm 0.02% thiab 0.1%, tab sis lawv tuaj yeem txhim kho kev ua haujlwm tau zoo. Cov txheej txheem tseem ceeb ntawm kev ua haujlwm suav nrog:
Kho qhov sib xws thiab rheology: Cov hmoov txhuv nplej siab ethers o hauv dej los ua cov kua nplaum. Thaum siv ua ke nrog lwm cov thickeners (xws li hydroxypropyl methylcellulose (HPMC) thiab hydroxyethyl methylcellulose (MHEC), lawv tuaj yeem ua kom zoo dua qhov txiaj ntsig thiab thixotropy ntawm cov mortar, kom ntseeg tau tias ob qho tib si ntws zoo thaum lub sijhawm thov thiab txo qis sagging tom qab sawv.
Txhim kho kev khaws dej: Cov hmoov txhuv nplej siab hloov kho yog cov hydrophilic heev, adsorbing thiab xauv rau hauv dej, txo cov dej nqus thiab evaporation ntawm lub substrate, xyuas kom meej tias muaj dej txaus ntawm cov cement lossis gypsum, thiab txhim kho lub zog thiab kev nplaum.
Tiv thaiv kom tsis txhob poob thiab los ntshav: Hauv cov nplaum rau pobzeb lossis cov ntawv thov ntsug, cov hmoov txhuv nplej siab ethers tuaj yeem txhim kho cov khoom tiv thaiv kev poob ntawm cov mortar. Hauv cov ntaub ntawv uas ua kom nws tus kheej sib npaug lossis cov ntaub ntawv nyias dua, lawv tuaj yeem txo qhov los ntshav thiab ua kom muaj qhov chaw du.
Txhim kho qhov kev xav ntawm daim ntawv thov: Lawv ua rau kev khawb thiab nthuav dav du dua, txo qhov "riam lo," txhim kho kev siv tau zoo thiab qhov zoo ntawm cov khoom kawg.
Cov hmoov txhuv nplej siab feem ntau siv ua ke nrog cov cellulose ethers (HPMC, HEMC, thiab MHEC) hauv cov qauv. Cellulose ethers muab cov khoom khaws cia dej thiab ua kom tuab, thaum cov hmoov txhuv nplej siab kho qhov thixotropy thiab kev sib xws ntawm cov mortar, ua tiav qhov ua haujlwm tau zoo dua. Piv txwv li, hauv cov qauv nplaum pobzeb, qhov ntau ntawm cov hmoov txhuv nplej siab ether tuaj yeem txo qhov kev nruj dhau los ntawm cov cellulose ethers viscosity siab, ua rau cov mortar yooj yim dua rau kev thov. Hauv cov hmoov putty, nws tuaj yeem txhim kho qhov du thiab txo qhov kev pheej hmoo ntawm kev ntsws thiab tawg.
Hauv kev siv ua vaj tse, cov hmoov txhuv nplej siab ethers muab cov txiaj ntsig zoo hauv qab no:
Kev phooj ywg ib puag ncig: Ua los ntawm cov hmoov txhuv nplej siab ntuj, lawv yog biodegradable thiab muaj kev cuam tshuam tsawg kawg nkaus rau ib puag ncig.
Kev siv nyiaj tsawg: Kev siv tsawg ua rau muaj kev txhim kho zoo heev, txo kev siv cov khoom ntxiv kim.
Kev hloov pauv ntawm cov mis: Haum rau cov cement-based, gypsum-based, thiab cov mixed-base mortars, thiab sib xws nrog ntau yam additives.
Txawvhmoov txhuv nplej siab etherCov hom thiab cov txheej txheem hloov kho ua rau muaj kev sib txawv ntawm cov nqi yaj, lub peev xwm tuab, tiv taus alkali, thiab kev ruaj khov. Yog li ntawd, hauv kev siv ua haujlwm, nws yog ib qho tseem ceeb kom xaiv hom tsim nyog raws li lub kaw lus tsim qauv, ib puag ncig kev tsim kho, thiab kev ua tau zoo, thiab txiav txim siab qhov ntau npaum li cas zoo tshaj plaws los ntawm kev sim. Starch ether yog ib qho "me me, muaj txiaj ntsig loj" ntxiv rau hauv cov ntaub ntawv tsim kho. Nws txhim kho qhov rheology ntawm mortar, kev khaws dej, thiab kev ua haujlwm tau zoo, txhim kho kev ua haujlwm ntawm kev tsim kho thiab cov khoom tiav zoo. Nws yog ib qho khoom siv tseem ceeb hauv cov txheej txheem mortar qhuav niaj hnub.
Lub sijhawm tshaj tawm: Lub Yim Hli-11-2025