Dab tsi yog cov txheej txheem ntawm methylcellulose?

Dab tsi yog lub luag haujlwm ntawm methyl cellulose ether nyob rau hauv cov hmoov av qhuav?
A: Methyl hydrotyl cellulose cellulose cellulose cellulose cellulose ether (MHEC) thiab methyl hydrothpropyl cellulose mus rau li methyl cellulose ether.

Hauv kev thaj teb qhuav tshuaj khib lav, cellulose cellulose, plastering hloov kho cov khoom, cov tshuaj colle, cov tshuaj khib nyiab, cov khoom siv hluav taws xob, cov khoom siv roj caulking. Nyob rau ntau yam hmoov nplej mortars, methyl cellulose ether feem ntau ua lub luag haujlwm ntawm dej khaws cia thiab thickening.

Dab tsi yog cov txheej txheem ntawm methylcellulose?
Teb: Firstly, lub cellulose raw khoom yog crushed, ces alkalized thiab pulped nyob rau hauv kev txiav txim ntawm caustic dej qab zib. Ntxiv Olemas oxide (xws li ethylene oxide lossis propylene oxide) thiab methyl chloride rau etherification. Thaum kawg, dej ntxuav thiab lim tau yog nqa tawm thaum kawg tau txais cov hmoov dawb. Cov hmoov no, tshwj xeeb nws cov kua aqueous, muaj cov khoom siv lub cev. Lub cellulose ether siv nyob rau hauv kev tsim kho kev tsim kho yog methyl hydroulrope etherco lossis MHPC, lossis ib qho kev sim ua ke MC). Cov khoom no ua si lub luag haujlwm tseem ceeb hauv thaj teb qhuav cug. lub luag haujlwm tseem ceeb.

Dab tsi yog cov dej tuav tseg ntawm Methyl cellulose ether (mc)?
Teb: Cov qib dej ceev yog ib qho ntawm cov ntsuas tseem ceeb los ntsuas cov khoom siv metyl, tshwj xeeb tshaj yog nyob rau hauv daim nyias event thiab gypsum-raws li cug. Kev ua kom cov dej sib luag yuav ua tau zoo tiv thaiv qhov tshwm sim ntawm lub zog ploj thiab tawg tshwm sim los ntawm kev ziab ntau thiab cov cawv tsis txaus. Cov dej ua ke zoo ntawm methyl cellulose hauv qab cov kev mob siab yog ib qho ntawm cov kev ua tau zoo ntawm methyl cellulose ether. Raws li ib txwm muaj xwm txheej, cov dej khaws cia ntawm feem ntau cov methyl cellulose cov neeg muaj kev pab tsawg dua nrog qhov ntsuas kub. Thaum qhov kub nce rau 40 ° C, dej tuav ntawm cov methyl cellulose cov neeg muaj cai raug txo ntau heev, uas tseem ceeb heev hauv cov chaw kub thiab qhuav. Thiab cov txheej txheej nyias txheej rau ntawm lub hnub ci nyob rau lub caij ntuj sov yuav muaj kev cuam tshuam loj. Txawm li cas los xij, ua rau cov tsis muaj dej khaws cia los ntawm cov khoom siv siab yuav ua rau muaj kuab heev ntawm cov khoom siv siab, uas yuav ua rau tsis muaj kev txhim kho.

Dej khaws cia yog ib qho tseem ceeb heev rau kev ua kom tiav cov txheej txheem tawv ntawm cov ntxhia cov kab ke. Nyob rau hauv kev txiav txim ntawm cellulose ether, noo noo tau maj mam tso rau hauv paus txheej lossis kev ua kom ntev los cuam tshuam nrog dej thiab maj mam ua rau muaj dej.