Ngokui-hydroxypropyl carboxymethyl celluloseImarike yokuthengisa ngokuqhubekayo, ixabiso alilingani, indlela yokucoca ngokukhawuleza umgangatho we-hydroxypropyl methyl cellulose ibe yingxaki ebalulekileyo! Ngoko ke ungawugweba njani umgangatho we-hydroxypropyl methylcellulose? Into yokuqala ekufuneka uyijonge bubumhlophe be-hydroxypropyl cellulose; Nangona ubumhlophe abunakucaca ukuba i-HPMC ifanelekile na ukusetyenziswa, kodwa kwinkqubo yokucubungula kukho abavelisi ababi abaya kongeza iarhente yokucoca, eya konakalisa umgangatho wayo. Kodwa ngokubanzi, uninzi lwe-cellulose ether egqwesileyo bubumhlophe obungcono.
Okwesibini, ukubona ubuncinci be-hydroxypropyl methyl cellulose: ubukhulu be-hydroxypropyl carboxymethyl cellulose yi-80-100 mesh, i-120 mesh ingaphantsi, i-hydroxyethyl cellulose HECHPMC malunga ne-100 mesh. I-HPMC kwi-mesh eninzi ye-60-80, i-methyl cellulose eqhelekileyo ithambile, kokukhona isasazeka ngcono.
Isisombululo sokucaca kwe-cellulose ether:I-HPMCFaka emanzini ukuvelisa isisombululo se-colloid esibonakalayo, jonga ukuba isisombululo siphezulu, kokukhona isisombululo esingayinyibilikisiyo ikhemikhali siphantsi.
Xa imveliso ifudunyezwa, iyaxutywa okanye idityaniswe ize emva koko inyibilike. Ayinamanzi kwaye ayinyibiliki emanzini. Ikhonkrithi yeyona nto iphambili edibanisa kwaye inyibilikise i-demulsification ye-putty powder engangeni manzi. Umgaqo wayo wokungangeni manzi ngolu hlobo lulandelayo: Kwinkqubo yokongeza amanzi kunye nokuxuba i-latex powder kunye nesamente ephinda inyibilike, i-latex powder ihlala ibuyela kwimo ye-emulsion yokuqala, kwaye amasuntswana e-latex asasazeka ngokulinganayo kwi-cement paste. Emva kokuba i-cement idibene namanzi, i-hydration reaction iyaqala, kwaye isisombululo se-Ca (OH) 2 sifikelela kwi-saturation kwaye sikhuphe iikristale, kwaye kwangaxeshanye, iikristale ze-ettringite kunye ne-calcium silicate hydrate colloids ziyaveliswa. Amasuntswana e-latex afakwa kwi-gel kunye namasuntswana esamente angangeni manzi. Ngokuqhubeka kwe-hydration reaction, iimveliso ze-hydration ziyanda, kwaye amasuntswana e-latex aqokelelwa kancinci kancinci kwindawo engenazinto eziphilayo ezifana nesamente, kwaye enze umaleko oqokelelweyo kumphezulu we-cement gel. Ngenxa yokuncipha kancinci kancinci kwamanzi omileyo, amasuntswana elatex apakishwe ngokuqinileyo aphinde asasazeka kwiijeli kunye neevoids ayaqina ukuze enze ifilimu eqhubekayo, enze umxube wepeyinti yesamente edibanisa i-matrix, kwaye adibanise ipeyinti yesamente nezinye izinto ezidityanisiweyo zepowder.
Ixesha leposi: Epreli-28-2024