Qhov piv ntawm HPMC Hydroxypropyl methyl cellulose thiab cement yog dab tsi?
Ib qho tshuaj mortar engineering insulation uas tsis muaj dej, nws cov yam ntxwv nyob ntawm qhov hnyav ntawm cov khoom siv raw ua: Pob zeb 30-340, hmoov av pov tseg engineering construction 40-50, lignin fiber 20-24, calcium formate 4-6, hydroxypropyl methyl cellulose 7-9, silicon carbide hmoov 40-45, calcium hydroxide hmoov 10-20, hmoov corundum xim av 10-12, hmoov av qhuav hauv nroog loj 30-35, av hauv nroog Datong 40-45, txhuas sulfate 4-6, carboxymethyl Base starch 20-24, cov khoom hloov kho nanotechnology carbon hmoov 4-6, dej 600-650; Cov tshuaj mortar engineering insulation uas tsis muaj dej ntawm cov khoom no muaj kev rwb thaiv tsev kub zoo, tiv taus hluav taws zoo, sib txuas nrog phab ntsa zoo, muaj zog compressive, ua haujlwm tensile, tiv taus kev laus zoo, tiv thaiv ib puag ncig zoo, tiv taus noo noo zoo heev, tiv taus tawg, tiv thaiv kev poob. Hnub no peb yuav tham txog qhov viscosity ntawm hydroxypropyl methyl cellulose aqueous solution yog dab tsi? Cia peb kawm txog nws tiag tiag.
1. Qhov hnyav molecular piv txwv, qhov kub ntawm cov kua dej, qhov nrawm txiav thiab txoj kev sim ntawm cellulose ether; 2. Qhov kub hloov iav siab dua, qhov hnyav molecular piv txwv ntau dua, qhov viscosity ntawm cov kua yog ntuj siab dua; 3. Qhov siab dua cov ntsiab lus ntawm cellulose ether, qhov siab dua qhov viscosity ntawm cov kua, yog li thaum siv daim ntawv thov peb yuav tsum them sai sai rau qhov ntau ntawm kev koom ua ke, tiv thaiv kev koom ua ke siab dhau, thiab cuam tshuam ncaj qha rau cov yam ntxwv ntawm cement mortar thiab cement concrete; 4. Zoo li feem ntau ntawm cov kua, qhov viscosity kuj tseem yuav txo qis nrog qhov nce ntawm qhov kub, ntxiv rau qhov siab dua cov ntsiab lus ntawm cellulose ether, qhov ntau dua qhov kev puas tsuaj ntawm qhov kub; Tsis tas li ntawd, qhov tseeb thickening nyhuv kuj sib txawv raws li qhov ntau ntawm cov dej siv rau epoxy cement.
Hydroxypropyl methyl cellulose aqueous solution viscosity kuj tseem tuaj yeem ua lub hauv paus tseem ceeb rau cov lus pom ntawm cov yam ntxwv ntawm cellulose ether. Qhov viscosity ntawm cov kua dej ntau dua, nws cov tuab ntawm epoxy cement cov ntaub ntawv zoo dua, ntawm sab nraub qaum ntawm lub phaj gelling cov yam ntxwv, tab sis yog tias viscosity loj dhau, yuav ua rau cov khoom siv epoxy cement raw tam sim ntawd liquidity thiab enforceability puas tsuaj. Raws li rau qee qhov self-leveling mortar nrog fluidity siab, qhov viscosity ntawm cellulose ether yuav raug teev tseg kom qis dua.
Cellulose ether aqueous kua yog ib lub cev pseudoplastic, peb nyob rau theem tom qab ntawm qhov kev kuaj pom ntawm qhov shear tus nqi yog ntau dua, qhov viscosity yog me dua.
Yog li ntawd, kom xaus lus yog: qhov sib xyaw ntawm cov cement mortar yuav raug txo los ntawm lub zog sab nraud, uas yog qhov zoo rau kev tsim kho vaj tse tom qab, tab sis cellulose ether aqueous kua hauv qhov xwm txheej ntawm qhov concentration qis heev, yuav tshwm sim cov yam ntxwv ntawm cov kua tsis-Newtonian, ntawm qhov tsis sib xws, thaum qhov concentration nce ntxiv, cov kua dej yuav tshwm sim cov yam ntxwv kua pseudoplastic.
Kev khaws dej ntawm hydroxypropyl methyl cellulose yog ib qho ntawm cov khoom tseem ceeb ntawm hydroxypropyl methyl cellulose. Qhov nrawm ntawm cov dej hauv cov khoom sib xyaw thiab cov khoom siv plaster cuam tshuam los ntawm qhov kub ntawm cov roj, qhov kub thiab qhov siab. Yog li ntawd, nyob rau hauv ntau lub caij sib txawv, ntxiv rau hydroxypropyl methyl cellulose tib yam dej ua tau zoo muaj qee qhov sib txawv.
Feem ntau, qhov viscosity ntawm hydroxypropyl methyl cellulose siab dua, qhov zoo dua qhov cuam tshuam ntawm kev khaws dej yuav zoo dua, tab sis qhov kev puas tsuaj ntawm viscosity rau kev khaws dej yuav raug txo qis tom qab viscosity tshaj 100,000 Mpa. s. Thaum viscosity ntawm HYDROXYpropyl methyl cellulose tshaj 100,000, qhov kev khaws dej tuaj yeem txhim kho tau zoo los ntawm kev nce ntxiv ntawm hydroxypropyl methyl cellulose.
Hauv cov txheej txheem tsim kho kom ntxaws, qhov cuam tshuam ntawm kev khaws dej ntawm cov slurry tuaj yeem hloov kho los ntawm kev kho qhov ntau ntawm hydroxypropyl methyl cellulose. Hydroxypropyl methyl cellulose series cov khoom tuaj yeem daws tau qhov teeb meem ntawm kev khaws dej hauv qab qhov kub siab tas mus li. Hauv lub caij kub siab tas mus li, tshwj xeeb tshaj yog nyob rau hauv thaj chaw kub thiab tho txawv thiab kev tsim kho ntawm chromatography ntawm sab hnub ci, qhov zoo HYDROXYpropyl methyl cellulose yog qhov yuav tsum tau los tsim kom muaj kev khaws dej ntawm cov slurry.
Zoo ntawm hydroxypropyl methyl cellulose, nws muaj qhov sib npaug zoo, nws cov tertiary butyl thiab hydroxypropyl oxygen functional pawg raws li cov qauv fiber molecular saw sib koom ua ke, nws tuaj yeem tsim methyl aldehyde pawg thiab cov pa oxygen, thiab dej zoo ntawm cov ntawv digital covalent bonds tuaj yeem ua dej khi thiab dej ntawm qhov dispersion, tom qab ntawd tswj tau qhov kub siab ua rau dej evaporation, khaws dej siab.
Cov khoom zoo ntawm hydroxypropyl methyl cellulose tuaj yeem haum rau hauv av xoob thiab lag luam hauv cov khoom sib xyaw ua ke thiab cov khoom siv plaster, thiab tag nrho cov khoom khov kho cyst, ntub dej, txias, thiab tsim ib txheej ntawm zaj duab xis, noo noo hauv nruab nrab ntev maj mam tso tawm ntawm lub hauv paus, nrog rau qhov pib ntawm cov organic compound admixture ntawm hydration reaction, tom qab ntawd lav qhov sib xws ntawm cov khoom siv raw compressive zog thiab tensile zog. Hauv kev kub siab kub lub caij ntuj sov kev tsim kho txheej txheem, yog li ntawd, kom ncav cuag cov dej nyhuv, yuav tsum ua raws li daim ntawv qhia rau qee qhov ntau thiab zoo ntawm hydroxypropyl methyl cellulose cov khoom, txwv tsis pub, yuav qhia qhov tho txawv sai dhau thiab ua rau tsis txaus hydration, txo qhov compressive zog, faib, popped cov yam ntxwv xws li metope khoob nruas thiab tsis ntseeg, kuj ua ke nrog tus neeg ua haujlwm tsim kho coefficient nyuaj. Raws li qhov kub poob qis, qhov ntau ntawm hydroxypropyl methyl cellulose tuaj yeem txo qis qeeb thiab tib yam dej tuav cov nyhuv tuaj yeem ua tiav.
Yog tias tsis ntxiv cellulose ether, cov chromatography ntawm cov cement mortar tshiab yuav qhuav sai sai, ua rau cov pob zeb tsis tuaj yeem hydrated hauv txoj kev ib txwm, ua rau cov cement mortar tsis tuaj yeem ua kom tawv thiab tau txais kev nplaum zoo dua. Tib lub sijhawm, kev ntxiv cellulose ether ua rau cov cement mortar muaj kev ywj pheej zoo thiab yooj ywm, thiab txhim kho lub zog sib txuas ntawm cov cement mortar.
1, hydroxypropyl methyl cellulose qhov loj me me
Qhov loj me ntawm cov cellulose ether ua rau nws cov solubility puas tsuaj. Cov cellulose ether zoo dua, nws qhov kev lwj sai dua hauv dej thiab nws cov yam ntxwv khaws dej ntau dua. Yog li ntawd, qhov loj me ntawm cov cellulose ether yuav tsum suav nrog hauv kev tshawb nrhiav ib qho ntawm nws cov yam ntxwv. Feem ntau, cellulose ether qhov loj me ntawm 80 mesh raws li.
2, hydroxypropyl methyl cellulose qhuav tsis muaj lub zog nqus
Qhuav manic tsis muaj lub ntiajteb txawj nqus tus nqi, hais txog qee qhov kub ntawm qhuav manic cellulose ether, qhov poob ntawm cov tshuaj zoo suav rau thawj cov qauv zoo feem pua ntawm cov khoom xyaw. Rau qee qhov zoo ntawm cellulose ether hauv qhuav tsis muaj lub ntiajteb txawj nqus tus nqi siab dhau, yuav txo cov khoom cuam tshuam hauv cellulose ether, ua rau muaj kev puas tsuaj rau qhov tseeb ntawm kev siv cov tuam txhab downstream, tab sis kuj txhim kho tus nqi yuav khoom. Feem ntau cov cellulose ether qhuav tsis muaj lub ntiajteb txawj nqus tus nqi yuav tsum tsis pub tshaj 5.0%.
3, hydroxypropyl methyl cellulose potassium thiocyanate tshauv
Rau qee qhov zoo ntawm cellulose ether hauv cov tshauv cov ntsiab lus siab dhau, yuav txo cov cellulose ether hauv cov khoom cuam tshuam, ua rau muaj kev puas tsuaj rau qhov tseeb ntawm kev siv cov tuam txhab downstream, cellulose ether potassium thiocyanate tshauv cov ntsiab lus yog qhov kev txiav txim siab tseem ceeb ntawm nws tus kheej cov yam ntxwv index tus nqi.
4, hydroxypropyl methyl cellulose viscosity
Hydroxypropyl methyl cellulose dej khaws cia thiab thickening nyhuv yog qhov tseem ceeb rau ntxiv cement mortar cellulose ether rau hauv nws tus kheej viscosity thiab kev koom ua ke.
5, hydroxypropyl methyl cellulose PH tus nqi
Qhov viscosity ntawm hydroxypropyl methyl cellulose cov khoom txo qis maj mam ntawm qhov kub siab dua lossis tom qab khaws cia ntev, tshwj xeeb tshaj yog rau cov khoom viscosity siab, yog li tus nqi pH yuav tsum raug txwv. Feem ntau nws tau teev tseg tias PH tus nqi qeb ntawm cellulose ether yuav tsum tau ua haujlwm li 5-9.
6. Kev kis tau ntawm hydroxypropyl methyl cellulose
Qhov zoo thiab qhov tsis zoo ntawm kev xa tawm ntawm hydroxypropyl methyl cellulose tuaj yeem cuam tshuam ncaj qha rau qhov tseeb ntawm nws siv hauv cov ntaub ntawv tsim kho. Cov yam tseem ceeb uas ua rau kev xa tawm ntawm cellulose ether yog
1) qhov zoo ntawm cov khoom siv raw; (2) qhov cuam tshuam tiag tiag ntawm deashing; (3) Kev npaj cov txheej txheem ua tiav; (4) kev npaj cov kuab tshuaj organic; (5) Qhov cuam tshuam tiag tiag ntawm zhonghe.
Raws li qhov tseeb ntawm daim ntawv thov, qhov kev xa tawm ntawm cellulose ether yuav tsum tsis pub tsawg dua 80%.
7, hydroxypropyl methyl cellulose xav tias kub
Hydroxypropyl methyl celluloseHauv cov khoom siv cement ua tus yuam sij rau kev nce cov nplaum, viscosity thiab cov neeg sawv cev khaws dej, yog li viscosity thiab gel kub yog tus nqi ntsuas tseem ceeb ntawm hydroxypropyl methyl cellulose. Qhov kub yog siv los txiav txim siab hom thiab qhov tshwj xeeb ntawm cellulose ether, thiab qib ntawm kev hloov pauv ntawm cellulose ether muaj feem cuam tshuam.
8. Ntxiv rau, ntsev thiab cov khoom seem kuj tseem yuav ua rau qhov kub ntawm cov kua nplaum puas tsuaj. Thaum qhov kub ntawm cov kua dej nce siab, cov polymer fiber maj mam tsis muaj dej, thiab qhov viscosity ntawm cov kua dej txo qis. Thaum ncav cuag qhov chaw nplaum, cov polymer qhuav tag thiab cov nplaum raug tsim tawm. Yog li ntawd, qhov kub ua haujlwm ntawm cov tswv cuab cement feem ntau qis dua qhov kub ntawm cov kua nplaum qub. Raws li tus qauv no, qhov kub qis dua, qhov viscosity siab dua, thiab qhov cuam tshuam tiag tiag ntawm viscosification thiab kev khaws cia dej.
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024