Kev tuav dej ntawmcellulose ethers
Kev tuav dej ntawm mortar yog hais txog lub peev xwm ntawm mortar kom khaws thiab kaw cov dej noo. Qhov siab dua qhov viscosity ntawm cellulose ether, qhov dej tuav tau zoo dua. Vim hais tias cov qauv cellulose muaj hydroxyl thiab ether bonds, cov pa atom ntawm hydroxyl thiab ether bond pawg yog txuam nrog cov dej molecule los tsim hydrogen bonds, kom cov dej dawb ua khi dej thiab cua dej, yog li ua si lub luag hauj lwm ntawm dej. khaws cia.
Solubility ntawmcellulose ether
1. Lub coarser cellulose ether yog yooj yim dispersed nyob rau hauv dej yam tsis muaj agglomeration, tab sis tus nqi dissolution qeeb heev.Cellulose ethersHauv qab 60 mesh yog yaj hauv dej li 60 feeb.
2. Cov khoom zoo ntawm cellulose ether yog yooj yim dispersed nyob rau hauv dej tsis muaj agglomeration, thiab tus nqi dissolution yog nruab nrab. Ntau tshaj 80 meshcellulose etheryog yaj hauv dej li 3 feeb.
3. Ultra-fine cellulose ether disperses sai sai hauv dej, dissolves sai, thiab tsim viscosity ceev. Ntau tshaj 120 meshcellulose etheryog yaj hauv dej li 10-30 vib nas this.
Qhov zoo dua cov khoom ntawm cellulose ether, qhov zoo dua cov dej tuav. Qhov saum npoo ntawm ntxhibCellulose Ether HEMCdissolves tam sim ntawd tom qab kev sib cuag nrog dej thiab tsim ib tug gel phenomenon. Cov kua nplaum qhwv cov khoom siv los tiv thaiv cov dej molecules los ntawm kev txuas ntxiv mus, thiab qee zaum tsis tuaj yeem sib npaug thiab yaj tom qab lub sijhawm ntev ntawm kev ntxhov siab, tsim cov tshuaj turbidized flocculent los yog caking. Cov khoom zoo tam sim ntawd disperse thiab yaj nyob rau hauv kev sib cuag nrog dej los tsim ib tug uniform viscosity.
Aeration ntawm cellulose ether
Lub aeration ntawm cellulose ether feem ntau yog vim cellulose ether kuj yog ib yam ntawm surfactant, thiab interfacial kev ua ntawm cellulose ether mas tshwm sim nyob rau hauv lub gas-kua-khoom interface, ua ntej los ntawm kev qhia npuas, ua raws li dispersion thiab ntub dej. Cellulose ethers muaj cov pab pawg alkyl, uas txo qhov nro ntawm qhov chaw thiab lub zog ntawm cov dej, ua rau cov tshuaj aqueous yooj yim tsim ntau cov npuas me me thaum muaj kev ntxhov siab.
Gelatinity ntawm cellulose ethers
Tom qab cov cellulose ether yaj nyob rau hauv mortar, pawg methoxy thiab hydroxypropyl pawg ntawm cov saw molecular yuav cuam tshuam nrog cov calcium thiab txhuas ions nyob rau hauv slurry los tsim ib tug viscous gel thiab sau lub void ntawm cov cement mortar, txhim kho cov densification ntawm lub slurry. mortar thiab ua si lub luag hauj lwm ntawm saj zawg zog filling thiab reinforcing. Txawm li cas los xij, thaum lub sib xyaw matrix raug nias, lub polymer tsis tuaj yeem ua lub luag haujlwm tsis tu ncua, yog li lub zog thiab compression folding piv ntawm cov mortar txo.
Zaj duab xis tsim cov khoom ntawm cellulose ether
Ib daim nyias nyias zaj duab xis yog tsim los ntawm cellulose ether thiab cement hais tom qab hydration, uas muaj cov nyhuv sealing thiab txhim kho qhov ziab ntawm mortar. Vim cov dej zoo khaws cia ntawm cellulose ether, cov dej molecules txaus yog khaws cia nyob rau hauv lub mortar sab hauv, thiaj li los xyuas kom meej lub hydration thiab hardening ntawm xis mas thiab ua tiav txoj kev loj hlob ntawm lub zog, txhim kho lub sib raug zoo ntawm lub mortar, thiab txhim kho cov khoom. cohesiveness ntawm lub mortar, kom lub mortar muaj zoo plasticity thiab yooj, thiab txo lub shrinkage deformation ntawm lub mortar.
Post lub sij hawm: Mar-12-2024