Cellulose ethers ma polymers ekugadzira akagadzirwa kubva kune yakasikwa cellulose uye akagadziridzwa kemikari. Cellulose ether inobva kune yakasikwa cellulose. Kusiyana nemapolymer ekugadzira, kugadzirwa kwe cellulose ether kunobva pa cellulose, iyo inonyanya kukosha zvinhu, yakasikwa polymer musanganiswa. Nekuda kweiyo chaiyo yeakasikwa cellulose chimiro, cellulose pachayo haina kugona kuita ne etherizing agents. Nekudaro, mushure mekurapwa kwesolubilizers, iyo yakasimba hydrogen zvisungo pakati uye mukati memamorekuru maketani zvinoparadzwa, uye hydroxyl boka basa rinoburitswa mualkali cellulose nekugona kuita, uye mushure mekuita kweiyo etherizing agent boka reOH rinoshandurwa. muboka OR kuwana cellulose ether.
Cellulose ethers ine mhepo-inopinza mhedzisiro pane ichangobva kusanganiswa sementitious zvinhu. Cellulose ethers ane ese ari maviri hydrophilic (hydroxyl, ether) uye hydrophobic (methyl, glucose ring) mapoka uye ari masurfactants ane basa repamusoro nekudaro ane mhepo-intraining effect. Mhepo-entraining effect ye cellulose ether ichabudisa "bhora" mhedzisiro, iyo inogona kuvandudza kushanda kwezvinhu zvitsva, zvakadai sekuwedzera mapurasitiki uye kutsetseka kwedhaka panguva yekushanda, iyo inobatsira pakupararira kwedhaka; ichavandudzawo goho redhaka uye kuderedza mari yekugadzira dhaka; zvisinei, ichawedzera porosity yezvinhu zvakaoma uye kuderedza simba rayo uye elastic modulus, etc. Mechanical properties.
Sezvinoita surfactant, cellulose ether inewo yekunyorova kana yekuzora pazvimedu zvesimende, izvo pamwe chete nemhepo-inopinza mhedzisiro inowedzera kuyerera kwezvinhu zvesimende, asi kukora kwayo kunoderedza kuyerera, uye mhedzisiro ye cellulose ether pane fluidity. cementitious zvinhu musanganiswa weplasticizing uye thickening mhedzisiro. Kazhinji kutaura, kana chiyero che cellulose ether chakanyanya kuderera, chinonyanya kuratidza kuitika kwepurasitiki kana kuderedzwa kwemvura; kana iyo yakawanda yakakwira, iyo thickening mhedzisiro ye cellulose ether inowedzera nekukurumidza, uye iyo mhepo-entraining mhedzisiro inowanzozara, saka inoratidza thickening mhedzisiro kana kuwedzera kudiwa kwemvura.
Nguva yekutumira: Kubvumbi-24-2022