Manje njengoba seziyanda izimakethe ze-hydroxypropyl carboxymethyl cellulose futhi amanani awalingani, indlela yokunquma kalula futhi ngokushesha ikhwalithi ye-hydroxypropyl carboxymethyl cellulose sekuyindaba ebalulekile!Ngakho-ke ungahlulela kanjani ikhwalithi ye-hydroxypropyl methylcellulose?Into yokuqala okufanele uyibheke ubumhlophe be-hydroxypropyl cellulose;nakuba ubumhlophe bungakwazi ukunquma ukuthi i-HPMC ikulungele yini ukusetshenziswa, abanye abakhiqizi abangathembekile bazongeza i-ejenti emhlophe ngesikhathi sokucubungula, okuzothinta ikhwalithi yayo.Kodwa ngokuvamile, iningi lama-cellulose ethers angcono kakhulu anobumhlophe obungcono.
Okwesibili, kuncike ebuhleni be-hydroxypropyl methylcellulose: usayizi wezinhlayiyana ze-hydroxypropyl carboxymethyl cellulose yi-80-100 mesh, ngaphansi kwe-120 mesh, kanye ne-hydroxyethyl cellulose HECHPMC cishe i-100 mesh.Iningi le-hpmc liyi-60-80 mesh.Ngokuvamile, uma i-methyl cellulose ithambile, kungcono ukuhlakazeka.
Ukucaca kwe-cellulose ether esixazululweni: faka i-HPMC emanzini ukuze kukhiqizwe isixazululo se-colloidal esobala, ukucaca okuphezulu, ukucaca okuphezulu, ukwehla kwezinto ezingancibiliki.
Lapho impahla ifudunyezwa, iphenduka igeli noma izikebhe bese iyancibilika.I-hydrophobic futhi iyancibilika.Ukhonkolo uyisibopho esiyinhloko kanye nokususa izinto ezingavuthiwe zempushana engavimbeli amanzi.Isimiso sokumelana namanzi simi kanje: lapho i-latex powder ne-samente ehlakazeka kabusha ihlanganiswa namanzi, i-latex powder izoqhubeka ibuyela efomini lokuqala le-emulsion, futhi izinhlayiya ze-latex Zihlakazeka ngokulinganayo ku-cement slurry.Ngemuva kokuthi usimende uhlangane namanzi, ukusabela kwe-hydration kuyaqala, futhi isisombululo se-Ca (OH) 2 sifinyelela ekugcwaliseni futhi amakristalu ayaqina.Ngesikhathi esifanayo, amakristalu e-ettringite kanye ne-calcium silicate hydrate colloids akhiwa, futhi izinhlayiya ze-latex zifakwe ku-On the gel kanye nezinhlayiya ze-cement ezingenamanzi, njengoba ukusabela kwe-hydration kuqhubeka, imikhiqizo ye-hydration iyaqhubeka nokukhula, futhi izinhlayiya ze-latex kancane kancane. qoqa ama-voids wezinto ezingaphili ezifana nosimende, futhi wenze ungqimba oluminyene phezu kwejeli likasimende., ngenxa yokuncipha kancane kancane komswakama owomile, izinhlayiya ze-latex ezipakishwe eduze kakhulu ezihlakazekile kujeli kanye ne-voids ziyajiya ukuze zenze ifilimu eqhubekayo, zenze ingxube ene-matrix engenelayo yokunamathisela usimende, futhi yenze usimende unamathisele nezinye izimpushana. zinamathele komunye nomunye.
Isikhathi sokuthumela: May-11-2023