I-ether ye-cellulose ligama eliqhelekileyo loluhlu lweemveliso eziveliswa yi-reaction ye-alkali cellulose kunye ne-etherifying agent phantsi kweemeko ezithile. I-alkali cellulose ithathelwa indawo ngama-ejenti ahlukeneyo etherifying ukufumana ezahlukeneyoi-cellulose ethers. Ngokweepropathi ze-ionization ze-substituents, i-cellulose ethers inokwahlulwa ibe ngamacandelo amabini: ionic (efana ne-carboxymethyl cellulose) kunye ne-non-ionic (njenge-methyl cellulose). Ngokohlobo lwe-substituent, i-cellulose ether inokohlulwa ibe yi-monoether (efana ne-methyl cellulose) kunye ne-ether edibeneyo (efana ne-hydroxypropyl methyl cellulose). Ngokutsho kwe-solubility eyahlukileyo, inokwahlulwa ibe yi-soluble yamanzi (efana ne-hydroxyethyl cellulose) kunye ne-organic solvent-soluble (efana ne-ethyl cellulose), njl njl. yahlulwe ngokohlobo olukhawulezileyo kunye nomgangatho onyangwayo wokulibaziseka uhlobo lokupheliswa.
Emva kokuba i-cellulose ether kwi-mortar ichithwe emanzini, ukuhanjiswa okusebenzayo kunye okufanayo kwezinto ze-cementitious kwinkqubo kuqinisekiswa ngenxa yomsebenzi ongaphezulu, kunye ne-cellulose ether, njenge-colloid ekhuselayo, "isonga" iinqununu eziqinileyo kunye nezimbozo. kubo kumphezulu ongaphandle. Yenza ifilimu yokuthambisa, yenza inkqubo yodaka iqine ngakumbi, kwaye iphinde iphucule i-fluidity yodaka ngexesha lokuxuba kunye nokuhamba kakuhle kokwakhiwa.
Ngenxa yesakhiwo sayo se-molekyuli, isisombululo se-cellulose ether senza amanzi kumdaka angabi lula ukulahleka, kwaye ngokuthe ngcembe akhuphe ixesha elide, enikezela udaka ngokugcina amanzi kunye nokusebenza kakuhle.
Udaka lwesamente oluzilinganisa ngokuzimeleyo, kunye ne-viscosity ephantsi ye-hydroxypropyl methylcellulose ether. Ekubeni wonke umhlaba ulungelelaniswa ngokwendalo ngongenelelo oluncinci ngabasebenzi bokwakha, xa kuthelekiswa nenkqubo yangaphambili yokugudiswa kwencwadana, ukuthambeka kunye nesantya sokwakha kuphuculwe kakhulu. Ixesha lokuxuba elomileyo lokuzilinganisa lithatha ithuba lokugcinwa kwamanzi kakuhle kwe-hydroxypropyl methylcellulose. Ekubeni ukuzilinganisa kufuna ukuba udaka oluxutywe ngokulinganayo lukwazi ukuzilungelelanisa ngokuzenzekelayo emhlabeni, amanzi makhulu ngokwentelekiso. Emva kokongeza i-hpmc, iya kulawula umhlaba Ukugcinwa kwamanzi okungaphezulu akubonakali, okwenza ukuba amandla angaphezulu aphakame emva kokumisa, kwaye i-shrinkage incinci, enciphisa ukuqhekeka. Ukongezwa kwe-HPMC kukwabonelela nge-viscosity, enokusetyenziswa njenge-anti-sedimentation aid, ukuphucula ukumanzi kunye nokumpompa, kunye nokuphucula ukusebenza kakuhle kokugalela umhlaba.
I-ether ye-cellulose efanelekileyo inesimo esibonakalayo esithambileyo kunye nobuninzi obuncinci; I-HPMC esulungekileyo inobumhlophe obuhle, izinto ezisetyenziswa kwimveliso zinyulu, impendulo icokisekile kwaye ayinabumdaka, isisombululo esinamanzi sicacile, ukuhanjiswa kokukhanya kuphezulu, kwaye akukho ammonia, istatshi kunye notywala. Ukungcamla, i-fibrous phantsi kwe-microscope okanye iglasi yokukhulisa.
Ixesha lokuposa: Dec-06-2022