Cellulose, tseem hu ua hydroxypropylmethylcellulose (HPMC), yog ib qho tseem ceeb ntawm gypsum. Gypsum yog ib qho khoom siv rau phab ntsa thiab qab nthab uas siv dav. Nws muab ib qho chaw du thiab sib npaug uas npaj txhij rau kev pleev xim lossis kho kom zoo nkauj. Cellulose yog ib qho khoom siv tsis muaj tshuaj lom, tsis ua rau ib puag ncig puas tsuaj thiab tsis muaj teeb meem siv los ua gypsum.
Cellulose siv rau hauv kev tsim cov gypsum los txhim kho cov yam ntxwv ntawm gypsum. Nws ua haujlwm ua ib qho nplaum, tuav cov plaster ua ke thiab tiv thaiv nws kom tsis txhob tawg lossis ntsws thaum nws qhuav. Los ntawm kev siv cellulose hauv cov stucco sib tov, koj tuaj yeem ua rau lub zog thiab kev ruaj khov ntawm stucco, ua rau nws kav ntev dua thiab xav tau kev saib xyuas tsawg dua.
HPMC yog ib qho polymer ntuj tsim los ntawm cellulose, muaj cov saw ntev ntawm glucose, hloov kho los ntawm kev sib xyaw nrog propylene oxide thiab methyl chloride. Cov khoom siv yog biodegradable thiab tsis muaj tshuaj lom, ib qho khoom siv zoo rau ib puag ncig. Dhau li ntawm qhov ntawd, HPMC yog soluble hauv dej, uas txhais tau tias nws tuaj yeem sib xyaw yooj yim rau hauv cov sib tov gypsum thaum npaj nws.
Ntxiv cellulose rau hauv cov stucco sib tov kuj pab txhim kho cov khoom sib txuas ntawm stucco. Cov cellulose molecules yog lub luag haujlwm rau kev tsim cov kev sib txuas ntawm stucco thiab qhov chaw hauv qab. Qhov no tso cai rau cov plaster kom lo rau qhov chaw zoo dua thiab tiv thaiv nws kom tsis txhob sib cais lossis tawg.
Lwm qhov txiaj ntsig ntawm kev ntxiv cellulose rau hauv cov gypsum sib tov yog tias nws pab txhim kho kev ua haujlwm ntawm gypsum. Cov cellulose molecules ua haujlwm ua cov roj nplua nyeem, ua rau nws yooj yim dua rau cov plaster kom nthuav dav. Qhov no ua rau nws yooj yim dua los thov cov plaster rau ntawm phab ntsa lossis qab nthab, muab qhov chaw du.
Cellulose kuj tseem tuaj yeem txhim kho qhov zoo nkauj ntawm cov plaster tiav. Los ntawm kev ua kom lub zog thiab kev ua haujlwm ntawm stucco, nws pab ua kom du, sib npaug tiav tsis muaj kab nrib pleb thiab qhov tsis zoo ntawm qhov chaw. Qhov no ua rau cov plaster pom tseeb dua thiab yooj yim dua rau pleev xim lossis kho kom zoo nkauj.
Ntxiv rau cov txiaj ntsig teev saum toj no, cellulose kuj tseem pab txhawb rau kev tiv thaiv hluav taws ntawm stucco. Thaum nws ntxiv rau hauv cov khoom sib xyaw gypsum, nws tuaj yeem pab qeeb qhov kev sib kis ntawm hluav taws los ntawm kev tsim ib qho thaiv ntawm hluav taws thiab phab ntsa lossis qab nthab.
Siv cellulose hauv kev tsim gypsum kuj muaj ntau yam txiaj ntsig rau ib puag ncig. Cov khoom siv no yog biodegradable thiab tsis muaj tshuaj lom, tsis muaj teeb meem rau ib puag ncig thiab tib neeg kev noj qab haus huv. Tsis tas li ntawd, vim tias cellulose ua rau lub plaster muaj zog thiab ruaj khov, nws pab txo qhov kev saib xyuas uas xav tau dhau sijhawm. Qhov no txo cov khib nyiab tsim tawm thiab pab txuag cov peev txheej.
Cellulose yog ib qho tseem ceeb ntawm gypsum. Ntxiv nws rau hauv cov stucco sib tov pab txhim kho lub zog, kev ruaj khov, kev ua haujlwm tau zoo thiab qhov zoo nkauj ntawm stucco. Ntxiv rau, nws muaj ntau yam txiaj ntsig ib puag ncig uas pab txo qhov xav tau kev saib xyuas mus sij hawm ntev. Kev siv cellulose hauv gypsum yog ib kauj ruam tseem ceeb rau kev tsim cov khoom siv hauv tsev uas ruaj khov thiab zoo rau ib puag ncig.
Lub sijhawm tshaj tawm: Lub Yim Hli-10-2023