Mumatope akagadzirira-akavhenganiswa, kuwedzera kwehuwandu hwehydroxypropyl methyl cellulose HPMC yakaderera zvikuru, asi inogona kuvandudza zvakanyanya kushanda kwevhu rakanyorova, iro rinowedzera kuwedzera kunokanganisa kushanda kwekuvaka kwedhaka. Cellulose ethers ine viscosity yakasiyana uye yakawedzerwa mari ine mhedzisiro yakanaka pakuvandudzwa kwekuita kwedhaka rakaoma. Parizvino, masonry akawanda uye madhaka ekupurasita ane hurombo hwekuchengeta mvura, uye kupatsanurwa kwemvura kunoitika mushure memaminitsi mashoma ekumira. Kuchengetedzwa kwemvura kuita kwakakosha kwemethyl cellulose ether, uye iko zvakare kuita uko vazhinji vanogadzira dhaka rakaoma mudzimba, kunyanya avo vari munzvimbo dzine tembiricha yakakwira kumaodzanyemba, vanoteerera. Zvinhu zvinokanganisa kuchengetedza kwemvura kwedhaka rakaoma zvinosanganisira huwandu hweHPMC yakawedzerwa, viscosity yeHPMC, kunaka kwezvikamu uye tembiricha yenzvimbo yainoshandiswa.
1. Pfungwa: Cellulose ether is a synthetic high molecular polymer inogadzirwa kubva kune yakasikwa cellulose kuburikidza nekugadzirisa kemikari. Cellulose ether inobva kune yakasikwa cellulose. Kugadzirwa kwe cellulose ether kwakasiyana nemapolymer ekugadzira. Yayo inonyanya kukosha ndeye cellulose, yakasikwa polymer musanganiswa. Nekuda kwechimiro chakakosha cheyakasikwa cellulose, cellulose pachayo haigone kuita ne etherifying agents. Asi mushure mekunge mumiririri wekuzvimba arapwa, zvisungo zvakasimba zvehydrogen pakati pemaketani emamorekuru uye mukati mecheni zvinoparadzwa, uye kusunungurwa kunoshanda kweboka rehydroxyl kunoshanduka kuita reactive alkali cellulose. Mushure mekunge etherification agent yaita, iyo -OH boka rinoshandurwa kuita -OR boka. Wana cellulose ether. Hunhu hwe cellulose ether hunoenderana nerudzi, huwandu uye kugovera kwezvinotsiva. Kurongeka kwema cellulose ethers zvakare kwakavakirwa pamhando dzezvinotsiva, dhigirii reetherification, solubility uye zvinoenderana nekushandisa. Zvinoenderana nerudzi rwezvinotsiva pane molecular cheni, inogona kukamurwa kuita monoether uye yakasanganiswa ether. Iyo HPMC yatinowanzo shandisa yakasanganiswa ether. Hydroxypropyl methyl cellulose ether HPMC chigadzirwa umo chikamu cheboka rehydroxyl payuniti chinotsiviwa neboka remethoxy uye chimwe chikamu chinotsiviwa neboka rehydroxypropyl. HPMC inonyanya kushandiswa mukuvaka zvinhu, latex coatings, mushonga, zuva nezuva kemisitiri, etc. Inoshandiswa seyakakora, inochengetedza mvura, stabilizer, dispersant, uye film-forming agent.
2.Kuchengetwa kwemvura ye cellulose ether: mukugadzirwa kwezvinhu zvekuvaka, kunyanya dhaka rakaoma, cellulose ether inoita basa risingadzoreki, kunyanya mukugadzirwa kwedhaka rinokosha (modified mortar), inokosha. chikamu. Basa rakakosha remvura-soluble cellulose ether mudhaka rinonyanya muzvikamu zvitatu. Imwe yakanakisa kuchengetedza mvura, imwe yacho isimba pakuenderana uye thixotropy yedhaka, uye yechitatu ndiko kupindirana nesamende. Kuchengetedzwa kwemvura kweselulosi ether kunoenderana nekutorwa kwemvura kwehwaro hwepasi, kuumbwa kwedhaka, ukobvu hwedhaka, kudiwa kwemvura kwedhaka, uye nguva yekumisikidza kwechinhu chinobatana. Kuchengetwa kwemvura ye cellulose ether pachayo kunobva mukunyungudika uye kupera simba kweiyo cellulose ether pachayo.
iyo thickening uye thixotropy ye cellulose ether: Basa rechipiri re cellulose ether-thickening rinoenderana ne: dhigirii yepolymerization ye cellulose ether, solution concentration, tembiricha uye mamwe mamiriro. Iyo gelation zvimiro zvemhinduro ndeye yakasarudzika zvimiro zvealkyl cellulose uye yakagadziridzwa maderivatives. Gelation maitiro ane hukama nedhigirii rekutsiva, kugadzirisa kugadzirisa uye zvinowedzera.
Iyo yakanaka yekuchengetedza mvura inoita kuti simende hydration iwedzere kuzara, inogona kuvandudza iyo yakanyorova tackiness yedhaka rakanyorova, kuwedzera kusimba kwechisungo chedhaka, uye nguva inogona kugadziriswa. Kuwedzerwa kwe cellulose ether kune mechanical spraying mortar kunogona kuvandudza kupfapfaidza kana kupomba kushanda kwedhaka, pamwe chete nekusimba kwemaitiro. Naizvozvo, cellulose ether iri kushandiswa zvakanyanya sechinhu chakakosha chekuwedzera mudhaka rakagadzirwa-musanganiswa.
Nguva yekutumira: Zvita-16-2021