Ngoku ekubeni kukho iimarike ezininzi ze-hydroxypropyl carboxymethyl cellulose kwaye amaxabiso engalingani, indlela yokufumanisa ngokulula nangokukhawuleza umgangatho we-hydroxypropyl carboxymethyl cellulose ibe yingxaki ebalulekileyo! Ngoko ke ungawugweba njani umgangatho we-hydroxypropyl methylcellulose? Into yokuqala ekufuneka uyijonge bubumhlophe be-hydroxypropyl cellulose; nangona ubumhlophe bungenakukwazi ukumisela ukuba i-HPMC ifanelekile na ukusetyenziswa, abanye abavelisi abangathembekanga baya kongeza iarhente yokwenza mhlophe ngexesha lokucubungula, nto leyo eya kuchaphazela umgangatho wayo. Kodwa ngokubanzi, uninzi lwee-ethers ze-cellulose ezintle zinobumhlophe obungcono.
Okwesibini, kuxhomekeke kubuchule be-hydroxypropyl methylcellulose: ubungakanani be-particle ye-hydroxypropyl carboxymethyl cellulose yi-80-100 mesh, ingaphantsi kwe-120 mesh, kwaye i-hydroxyethyl cellulose HECHPMC imalunga ne-100 mesh. Uninzi lwe-hpmc yi-60-80 mesh. Ngokubanzi, okukhona i-methyl cellulose ithambile, kokukhona i-dispersion ingcono.
Ukucaca kwe-cellulose ether kwisisombululo: faka i-HPMC emanzini ukuze kuveliswe isisombululo se-colloidal esicacileyo, kokukhona kucaca ngakumbi, kokukhona kucaca ngakumbi, kokukhona izinto ezinganyibilikiyo ziphantsi.
Xa imveliso ifudunyezwa, iyayijika okanye inyibilike ize inyibilike. Ayinamanzi kwaye ayinyibiliki. Ikhonkrithi yeyona nto iphambili edibanisa kwaye isusa i-mulsifying green material kwi-putty powder engangeni manzi. Umgaqo wokumelana namanzi ngolu hlobo lulandelayo: xa i-latex powder kunye nesamente eziphinda zichithwe zixutywe namanzi, i-latex powder iya kuqhubeka ibuyela kwimo ye-emulsion yokuqala, kwaye ii-latex particles Zisasazeka ngokulinganayo kwi-samente slurry. Emva kokuba i-samente idibene namanzi, i-hydration reaction iyaqala, kwaye isisombululo se-Ca(OH)2 sifikelela kwi-saturation kwaye iikristale ziyaqina. Kwangaxeshanye, iikristale ze-ettringite kunye ne-calcium silicate hydrate colloids ziyakhiwa, kwaye ii-latex particles zifakwa kwi-On the gel kunye nee-samente ezingafakwanga manzi, njengoko i-hydration reaction iqhubeka, iimveliso ze-hydration ziyaqhubeka nokwanda, kwaye ii-latex particles ziqokelelana kancinci kancinci kwi-voids yezinto ezingaphiliyo ezifana nesamente, kwaye zenze umaleko oxineneyo kumphezulu we-samente gel. , ngenxa yokuncipha kancinci kokufuma okomileyo, amasuntswana e-latex ahlanganiswe ngokusondeleyo kwijeli kunye ne-voids ayajiya ukuze enze ifilimu eqhubekayo, okwenza umxube nge-interpenetrating matrix ye-samente paste, kwaye kwenze i-samente paste kunye nezinye ii-powders. Ama-aggregates ancamatheliswe omnye komnye.
Ixesha lokuthumela: Meyi-11-2023