Manjei-hydroxypropyl carboxymethyl celluloseImakethe yokuthengisa iyanda, intengo ayilingani, indlela yokususa ngokushesha ikhwalithi ye-hydroxypropyl methyl cellulose isibe yinkinga ebalulekile! Ngakho-ke ungahlulela kanjani ikhwalithi ye-hydroxypropyl methylcellulose? Into yokuqala okufanele uyibheke ubumhlophe be-hydroxypropyl cellulose; Nakuba ubumhlophe bungenakucaca ukuthi i-HPMC ifanele yini ukusetshenziswa, kodwa enkambisweni yokucubungula kukhona nabanye abakhiqizi ababi abazokwengeza i-ejenti yokwenza mhlophe, ezolimaza ikhwalithi yayo. Kodwa ngokuvamile, iningi le-cellulose ether elihle kakhulu limhlophe kangcono.
Okwesibili, ukubona ubuncane be-hydroxypropyl methyl cellulose: ubukhulu bezinhlayiya ze-hydroxypropyl carboxymethyl cellulose obuyi-80-100 mesh, i-120 mesh encane, i-hydroxyethyl cellulose HECHPMC cishe i-100 mesh. I-HPMC yeningi le-mesh engu-60-80, i-methyl cellulose ejwayelekile ithambile, ukuhlakazeka okungcono.
Isixazululo sokucaca kwe-cellulose ether:I-HPMCFaka emanzini ukuze ukhiqize isixazululo se-colloid esibonakalayo, bheka ukuthi uma isixazululo siphezulu, isixazululo samakhemikhali siphezulu, esingancibilikisi siphansi.
Uma impahla ishiswa, iyashiswa ibe yi-gelatin noma ihlanganiswe bese incibilikiswa kabusha. Ayinamanzi futhi ayincibiliki emanzini. Ikhonkrithi iyinto ebalulekile yokubopha kanye nokususa i-mulsification yempuphu ye-putty engangeni manzi. Isimiso sayo sokumelana namanzi simi kanje: Enqubweni yokwengeza amanzi nokuxuba i-latex powder kanye ne-simende ephinde ihlakazeke, i-latex powder iqhubeka ibuyela esimweni sokuqala se-emulsion, kanti izinhlayiya ze-latex zihlakazeka ngokulinganayo ku-cement paste. Ngemva kokuba i-cement ihlangane namanzi, kuqala ukusabela komswakama, bese isixazululo se-Ca (OH) 2 sifinyelela ekugcwaleni futhi sikhiphe amakristalu, futhi ngasikhathi sinye, kukhiqizwa amakristalu e-ettringite kanye nama-calcium silicate hydrate colloids. Izinhlayiya ze-latex zifakwa ku-gel kanye nezinhlayiya ze-cement ezingangeni manzi. Ngokuthuthuka kokusabela komswakama, imikhiqizo yomswakama iyanda, futhi izinhlayiya ze-latex ziqoqwa kancane kancane endaweni engenalutho yezinto ezingaphili njenge-cement, futhi zakha ungqimba lokuqongelela oluseduze ebusweni be-cement gel. Ngenxa yokuncipha kancane kancane kwamanzi omile, izinhlayiya ze-latex ezihlanganiswe ngokuqinile ezihlakazekile kuma-gel kanye ne-voids ziyaqina ukuze zakhe ifilimu eqhubekayo, zakha ingxube ye-cement paste interpenetrating matrix, futhi zibophe i-cement paste nezinye izinto ezihlanganisiwe ze-powder.
Isikhathi sokuthunyelwe: Ephreli-28-2024