Mabasa e cellulose ether mudhaka ndeaya: kuchengetedza mvura, kuwedzera kubatana, kukora, kukanganisa nguva yekuisa, uye mhepo-inopinza zvinhu.Nekuda kweaya maitiro, ine yakafara nzvimbo yekushandisa mukuvaka dhaka rezvinhu.
1. Kuchengetwa kwemvura ye cellulose ether ndiyo inonyanya kukosha mukushandiswa kwedhaka.
Zvinhu zvikuru zvinokanganisa kuchengetwa kwemvura ye cellulose ether: viscosity, particle size, dosage, active ingredient, dissolution rate, water retention mechanism: kuchengetwa kwemvura ye cellulose ether pachayo inobva mukunyungudika uye kupera kwemvura ye cellulose ether pachayo.Kunyangwe iyo cellulose molecular chain ine nhamba yakakura yemapoka ehydroxyl ane yakasimba hydration zvimiro, haina kunyungudika mumvura.Izvi zvinodaro nekuti iyo cellulose dhizaini ine yakakwira mwero wecrystallinity, uye iyo hydration kugona kwemapoka ehydroxyl chete haina kukwana kuparadza yakasimba intermolecular bond.Hydrogen bond uye van der Waals masimba, saka inongozvimba asi hainyungudika mumvura.Kana chinotsiva chikaunzwa mucheni yemolecular, kwete chete chinotsiva chinotyora chisungo chehydrogen, asiwo iyo interchain hydrogen bond inotyoka nekuda kwekuroora kweiyo inotsiva pakati pecheni dziri padyo.Iyo yakakura iyo inotsiva, yakakura chinhambwe pakati pemamorekuru, chinoparadza iyo hydrogen bond athari.Iyo yakakura iyo cellulose lattice, mhinduro inopinda mushure mekunge cellulose lattice yawedzera, uye cellulose ether inonyungudika mumvura, ichiita mhinduro yepamusoro-viscosity.Kana kutonhora kuchikwira, hydration yepolymer inopera, uye mvura pakati pemaketani inodzingwa kunze.Kana kupera kwemvura kuchikwana, mamorekuru anotanga kuungana, achigadzira matatu-dimensional network dhizaini uye gel kunaya.
(1) Mhedzisiro yehukuru hwechikamu uye kusanganisa nguva ye cellulose ether pakuchengetedza mvura
Nechiyero chakafanana che cellulose ether, kuchengetwa kwemvura kwedhaka kunowedzera nekuwedzera kwe viscosity;kuwedzera kwehuwandu hwe cellulose ether uye kuwedzera kwe viscosity kunowedzera kuchengetwa kwemvura kwedhaka.Apo zvinyorwa zve cellulose ether zvinodarika 0.3%, kuchinja kwekuchengetedza mvura yedhaka kunowanzove kwakaenzana.Iyo yekuchengeta mvura yedhaka inodzorwa zvakanyanya nenguva yekunyungudika, uye iyo yakanaka cellulose ether inonyungudika nekukurumidza, uye simba rekuchengetedza mvura rinokura nekukurumidza.
(2) Mhedzisiro yedhigirii etherification ye cellulose ether uye tembiricha pakuchengetedza mvura
Sezvo tembiricha inokwira, kuchengetwa kwemvura kunodzikira, uye nepamusoro dhigirii ye etherification ye cellulose ether, zviri nani kukwira kwekushisa kwemvura kuchengetwa kwe cellulose ether.Panguva yekushandiswa, tembiricha yedhaka ichangobva kusanganiswa inowanzodzika kupfuura 35°C, uye pasi pemamiriro ekunze anokosha, tembiricha inogona kusvika kana kutopfuura 40°C.Muchiitiko ichi, fomura inofanira kugadziriswa uye chigadzirwa chine dhigirii yepamusoro ye etherification inofanira kusarudzwa.Kureva, funga kusarudza yakakodzera cellulose ether.
2. Mhedzisiro ye cellulose ether pane mhepo yemukati yedhaka
Muzvigadzirwa zvedhaka zvakaomeswa, nekuda kwekuwedzera kweselulosi ether, imwe chiyero chidiki, chakagovaniswa uye yakagadzikana mabhuru emhepo anounzwa mudhaka idzva rakasanganiswa.Nekuda kweiyo bhora mhedzisiro yemabhuru emhepo, iyo dhaka ine yakanaka yekushanda uye inoderedza torsion yedhaka.Kupwanya uye shrinkage, uye kuwedzera chiyero chekubuda kwedhaka.
3. Mhedzisiro ye cellulose ether pane simenti hydration
Cellulose ether ine retardation kune hydration yesamende-based mortar, uye kunonoka kwekuita kunowedzerwa nekuwedzera kwe cellulose ether content.Izvo zvinofurira zvinhu zve cellulose ether pane simenti hydration ndezvi: dosi, dhigirii reetherification, rudzi rwesimende.
Nguva yekutumira: Feb-02-2023