Zvino zvakwava nemisika yakawanda yehydroxypropyl carboxymethyl cellulose uye mitengo isiri yakafanana, nzira yekuziva nyore uye nekukurumidza mhando yehydroxypropyl carboxymethyl cellulose yave nyaya yakakosha! Saka ungatonga sei mhando yehydroxypropyl methylcellulose? Chinhu chekutanga chekutarisa kuchena kwehydroxypropyl cellulose; kunyangwe kuchena kwayo kusingakwanise kuona kana HPMC yakakodzera kushandiswa, vamwe vagadziri vasina hunyengeri vanozowedzera chinhu chinochenesa panguva yekugadzirisa, izvo zvinokanganisa mhando yayo. Asi kazhinji, akawanda e ethers akanaka e cellulose ane kuchena kuri nani.
Chechipiri, zvinoenderana nekupfava kwehydroxypropyl methylcellulose: saizi yezvikamu zvehydroxypropyl carboxymethyl cellulose i80-100 mesh, isingasviki 120 mesh, uye hydroxyethyl cellulose HECHPMC i100 mesh. Huwandu hwakawanda hwehpmc i60-80 mesh. Kazhinji, kana methyl cellulose yakapfava, kupararira kwayo kuri nani.
Kujeka kwe cellulose ether mumushonga: isa HPMC mumvura kuti igadzire mhinduro yakajeka ye colloidal, kujeka kwakanyanya, kujeka kwakanyanya, uye zvinhu zvisinganyunguduke zvinoderera.
Kana chinhu chacho chikadziiswa, chinonyunguduka kana kunyura mumvura. Chinonyunguduka mumvura uye chinonyunguduka. Kongiri ndiyo chinhu chakakosha chinosunga uye chinobvisa musanganiswa weputty powder isingapindi mvura. Nheyo yekudzivirira mvura ndeiyi inotevera: kana latex powder necement zvinosanganiswa nemvura, latex powder zvinoramba zvichidzokera kuchimiro chepakutanga che emulsion, uye latex particles Zvinopararira zvakaenzana mu cement slurry. Mushure mekunge simende yasangana nemvura, hydration reaction inotanga, uye Ca(OH)2 solution inosvika pakuzara uye makristaro anowira. Panguva imwe chete, ettringite crystals uye calcium silicate hydrate colloids zvinoumbwa, uye latex particles dzinoiswa paOn the gel ne unnamed cement particles, sezvo hydration reaction ichienderera mberi, hydration products dzinoramba dzichiwedzera, uye latex particles dzinoungana zvishoma nezvishoma mu voids yezvinhu zvisina kugadzirwa senge simende, uye dzinoumba dense package pamusoro pe cement gel. , nekuda kwekudzikira zvishoma nezvishoma kwehunyoro hwakaoma, zvidimbu zvelatex zvakasanganiswa zviri mugel uye mavoids zvinobatana kuti zvigadzire firimu rinoenderera mberi, zvichiita musanganiswa ne interpenetrating matrix ye simende paste, uye kugadzira simende paste nedzimwe upfu. Ma aggregates anonamirwa pamwe chete.
Nguva yekutumira: Chivabvu-11-2023