Manje njengoba sekunezimakethe eziningi ze-hydroxypropyl carboxymethyl cellulose futhi amanani engalingani, indlela yokuthola kalula nangokushesha ikhwalithi ye-hydroxypropyl carboxymethyl cellulose isibe yinkinga ebalulekile! Ngakho-ke ungahlulela kanjani ikhwalithi ye-hydroxypropyl methylcellulose? Into yokuqala okufanele uyibheke ubumhlophe be-hydroxypropyl cellulose; yize ubumhlophe bungenakunquma ukuthi i-HPMC ifanele yini ukusetshenziswa, abanye abakhiqizi abangathembekile bazofaka i-ejenti yokwenza mhlophe ngesikhathi sokucubungula, okuzothinta ikhwalithi yayo. Kodwa ngokuvamile, iningi lama-ether e-cellulose amahle kakhulu anobumhlophe obungcono.
Okwesibili, kuncike ekutheni i-hydroxypropyl methylcellulose ithambile kangakanani: usayizi wezinhlayiya ze-hydroxypropyl carboxymethyl cellulose ungama-mesh angu-80-100, ngaphansi kwama-mesh angu-120, kanti i-hydroxyethyl cellulose HECHPMC ingama-mesh angaba ngu-100. Iningi le-hpmc lingama-mesh angu-60-80. Ngokuvamile, uma i-methyl cellulose ithambile, kulapho ukuhlakazeka kwayo kuba ngcono khona.
Ukucaca kwe-cellulose ether esixazululweni: faka i-HPMC emanzini ukuze ukhiqize isixazululo se-colloidal esibonakalayo, ukucaca kuphakeme, ukucaca kuphakeme, izinto ezinganyibiliki ziyancipha.
Uma impahla ifudunyezwa, iyawafaka amajeli noma iwahlanganise bese iyancibilika. Ayinamanzi futhi ayincibiliki. Ikhonkrithi iyisibopho esiyinhloko kanye nokususa i-mulsifying impahla eluhlaza ye-putty powder engangeni manzi. Isimiso sokumelana namanzi simi kanje: lapho i-latex powder ne-simende ephinde ihlakazeke ixutshwe namanzi, i-latex powder izoqhubeka nokubuyela esimweni sokuqala se-emulsion, bese izinhlayiya ze-latex Zihlakazeka ngokulinganayo ku-slurry yekhonkrithi. Ngemva kokuba i-simende ihlangane namanzi, ukusabela komswakama kuqala, bese isixazululo se-Ca(OH)2 sifinyelela ekugcwaleni futhi amakristalu ayakhukhuleka. Ngesikhathi esifanayo, kwakheka amakristalu e-ettringite kanye nama-calcium silicate hydrate colloids, bese izinhlayiya ze-latex zifakwa ku-On the gel kanye nezinhlayiya zekhonkrithi ezingamanzi, njengoba ukusabela komswakama kuqhubeka, imikhiqizo yomswakama iyaqhubeka nokwanda, kanti izinhlayiya ze-latex ziqoqana kancane kancane ezindaweni ezingenalutho zezinto ezingaphili njengekhonkrithi, bese zakha ungqimba olugcwele phezu kobuso be-simende yekhonkrithi. , ngenxa yokuncipha kancane kancane komswakama owomile, izinhlayiya ze-latex ezihlanganiswe ndawonye eziphinde zahlakazeka kujeli kanye nezikhala ziyahlangana ukuze zakhe ifilimu eqhubekayo, zakha ingxube nge-matrix ehlanganayo ye-paste yesimende, bese zenza i-paste yesimende kanye nezinye izimpushana. Ama-aggregates anamathelana.
Isikhathi sokuthunyelwe: Meyi-11-2023