Manjei-hydroxypropyl carboxymethyl celluloseimakethe yokuthengisa kakhulu, intengo ayilingani, indlela yokususa ngokushesha ikhwalithi ye-hydroxypropyl methyl cellulose isiyinkinga ebalulekile! Ngakho-ke ungahlulela kanjani ikhwalithi ye-hydroxypropyl methylcellulose? Into yokuqala okufanele uyibheke ubumhlophe be-hydroxypropyl cellulose; Nakuba ubumhlophe bungacaci ukuthi ngabe i-HPMC ifaneleka yini ukufaka isicelo, kodwa ngesikhathi sokucubungula kukhona nabakhiqizi ababi abazokwengeza i-ejenti emhlophe, izolimaza ikhwalithi yayo. Kodwa ngokuvamile, iningi le-cellulose ether enhle kakhulu liwubumhlophe obungcono.
Okwesibili, ukubona ubuhle be-hydroxypropyl methyl cellulose: usayizi wezinhlayiyana ze-hydroxypropyl carboxymethyl cellulose we-80-100 mesh, 120 mesh less, hydroxyethyl cellulose HECHPMC mayelana ne-100 mesh. I-HPMC yobuningi be-60-80 mesh, i-methyl cellulose evamile ithambile, ukuhlakazeka okungcono.
Isixazululo sokucaca kwe-cellulose ether:I-HPMCfaka emanzini ukukhiqiza isixazululo se-colloid esobala, bheka ukuphakama kwesinqumo, ukuphakama kwesinqumo, okungancibiliki into yamakhemikhali iphansi.
Lapho impahla ifudunyezwa, ifakwa i-gelatinized noma ihlanganiswe bese iyancibilika. I-hydrophobic futhi iyancibilika emanzini. Ukhonkolo uyisibopho esiyinhloko kanye ne-demulsification impahla eluhlaza ye-putty engavimbeli amanzi. Isimiso sayo sokumelana namanzi simi kanje: Enqubweni yokwengeza amanzi nokunyakazisa impushana ye-latex ehlakazeka kabusha nosimende, impushana ye-latex ilokhu ibuyela efomini lokuqala le-emulsion, futhi izinhlayiya ze-latex zihlakazeka ngokulinganayo kusimende. Ngemuva kokuthi usimende uhlangane namanzi, ukusabela kwe-hydration kuyaqala, futhi isisombululo se-Ca (OH) 2 sifinyelela ku-saturation kanye ne-precipitates amakristalu, futhi ngesikhathi esifanayo, amakristalu e-ettringite ne-calcium silicate hydrate colloids akhiqizwa. Izinhlayiya zeLatex zifakwa kujeli kanye nezinhlayiya zikasimende ezingenamanzi. Ngokuqhubeka kokusabela kwe-hydration, imikhiqizo ye-hydration iyakhula, futhi izinhlayiya ze-latex ziqoqwa kancane kancane ngaphandle kwezinto ezingaphili ezifana nosimende, futhi zakha ungqimba oluseduze lokuqongelela ebusweni bejeli yesimende. Ngenxa yokuncipha kancane kancane kwamanzi omile, Izinhlayiya ze-latex ezihlanganiswe ngokuqinile ezihlakazekile kumajeli futhi i-voids iyajiya ukuze yenze ifilimu eqhubekayo, yakhe ingxube ye-matrix usimende enamathelayo, futhi ihlanganisa unamathisele usimende nezinye izinhlanganisela zempushana.
Isikhathi sokuthumela: Apr-28-2024