Kev tsim cov hydroxypropyl methyl cellulose tshwj xeeb kom tsis txhob muaj dej noo nkag mus rau ntawm phab ntsa, tsuas yog qhov ntau ntawm cov dej noo tuaj yeem nyob hauv cov cement cement tsim cov kev ua tau zoo hauv dej thiab lub luag haujlwm ntawm hydroxypropyl methyl cellulose hauv cov mortar tuaj yeem sib npaug rau viscosity, qhov siab dua viscosity ntawm hydroxypropyl methyl cellulose dej khaws cia yuav zoo dua.
Thaum cov dej noo ntawm hydroxypropyl methyl cellulose siab dhau lawm, qhov kev khaws dej ntawm hydroxypropyl methyl cellulose yuav poob qis, thiab nws yuav ncaj qha ua rau kev tsim kho zoo ntawm hydroxypropyl methyl cellulose. Peb kuj paub txog tej yam uas yuav yooj yim ua yuam kev, peb yuav tsum khaws cov khoom tshiab tas li, peb yuav tau txais cov txiaj ntsig tsis tau xav txog.
Qhov viscosity pom tseeb yog qhov ntsuas tseem ceeb ntawm hydroxypropyl methyl cellulose. Cov txheej txheem ntsuas feem ntau yog kev ntsuas viscosity rotational, kev ntsuas viscosity capillary thiab kev ntsuas viscosity poob.
Yav tas los, hydroxypropyl methyl cellulose tau txiav txim siab los ntawm kev ntsuas capillary viscosity, siv Uhnscher viscometer. Cov kua ntsuas feem ntau yog cov kua dej ntawm 2, thiab cov mis yog: V = Kdt. V yog viscosity hauv vib nas this, K yog qhov tsis hloov pauv ntawm viscometer, D yog qhov ceev ntawm qhov kub tas li, thiab T yog lub sijhawm nws siv los mus ntawm sab saud mus rau hauv qab ntawm viscometer hauv vib nas this. Txoj kev ua haujlwm no nyuaj dua, yog tias muaj cov khoom tsis yaj, nws yooj yim ua rau muaj qhov yuam kev, nws nyuaj rau txheeb xyuas qhov zoo ntawm hydroxypropyl methylcellulose.
Qhov teeb meem ntawm kev faib cov kua nplaum hauv tsev yog qhov teeb meem loj uas cov neeg siv khoom ntsib. Ua ntej tshaj plaws, qhov teeb meem ntawm cov khoom siv raw yuav tsum tau xav txog rau kev faib cov kua nplaum hauv tsev. Qhov laj thawj tseem ceeb rau kev faib cov kua nplaum hauv tsev yog qhov tsis sib xws ntawm polyvinyl cawv (PVA) thiab hydroxypropyl methylcellulose (HPMC). Qhov laj thawj thib ob yog tias lub sijhawm sib tov tsis txaus; Kuj tseem muaj qhov ua tau zoo ntawm kev ua kom cov kua nplaum tuab tsis zoo.
Hauv cov kua nplaum rau kev tsim kho, yuav tsum siv cov hydroxypropyl methylcellulose (HPMC) tam sim ntawd vim tias HPMC tsuas yog tawg hauv dej thiab tsis yaj tiag tiag. Kwv yees li 2 feeb, qhov viscosity ntawm cov kua maj mam nce ntxiv, tsim cov colloid viscous pob tshab.
Cov khoom kub yaj, hauv dej txias, tuaj yeem tawg sai sai hauv dej kub, ploj mus hauv dej kub, thaum qhov kub poob rau qee qhov kub, viscosity maj mam tshwm sim, kom txog thaum tsim cov pob tshab viscous colloid. Hydroxypropyl methylcellulose (HPMC) hauv cov kua nplaum tsev ntxiv qhov ntau yog pom zoo rau 2-4kg.
Hydroxypropyl methyl cellulose (HPMC) nyob rau hauv lub tsev kua nplaum tshuaj stability, mildew, dej tuav nyhuv yog zoo, thiab tsis cuam tshuam los ntawm PH hloov pauv, viscosity ntawm 100 000 S - 200 000 S siv tau. Tab sis nyob rau hauv ntau lawm tsis yog qhov siab dua qhov viscosity zoo dua, qhov viscosity thiab kev sib txuas lub zog yog inversely proportional, qhov siab dua qhov viscosity, lub zog yog me dua, feem ntau 100,000S viscosity yog tsim nyog.
Lub sijhawm tshaj tawm: Cuaj hlis-16-2022