Mukugadzirwa kwehupfu hwakaoma dhaka, methyl cellulose inenge yakaderera kuwedzera huwandu, asi ine yakakosha yekuwedzera iyo inogona kuvandudza zvakanyanya kusanganisa uye kuvaka kwekuita kwedhaka. Kuisa zviri nyore, zvinenge zvese zvakanyorova kusanganisa zvivakwa zvedhaka zvinogona kuoneka neziso rakashama zvinopihwa ne cellulose ether. Inobva ku cellulose inowanikwa nekushandisa cellulose kubva muhuni nedonje, inopindirana necaustic soda, uye ichiisa etherifying ne etherifying agent.
Mhando dzeMethyl Cellulose Ether
A. Hydroxypropyl methylcellulose (HPMC) inonyanya kugadzirwa nedonje yakacheneswa zvakanyanya seyakagadzirwa, iyo inonatswa etherified pasi pemamiriro ealkaline.
B. Hydroxyethyl methyl cellulose (HEMC), isiri-ionic cellulose ether, ipfu chena, isinganhuwi uye isina kunaka.
C. Hydroxyethylcellulose (HEC) isiri-ionic surfactant, chena muchimiro, isinganhuhwi uye isinganakidze uye iri nyore-kuyerera poda.
Izvo zviri pamusoro ndezvisiri-ionic cellulose ethers, uye ionic cellulose ethers (senge carboxymethyl cellulose (CMC)).
Panguva yekushandiswa kwevhu rakaoma dhaka, nokuti ionic cellulose (CMC) haina kugadzikana muhupo hwe calcium ions, haiwanzoshandiswa mune inorganic gelling systems nesamende uye slaked lime se cementing zvinhu. Mune dzimwe nzvimbo muChina, Mamwe emukati emadziro putties akagadziridzwa ane yakagadziridzwa starch sechinhu chikuru simende uye Shuangfei poda semuzadziri anoshandisa CMC seyakakora, asi nekuti chigadzirwa ichi chinowanzoita mildew uye hachidzivirire mvura, chinobviswa zvishoma nezvishoma. nepamusika . Parizvino, cellulose ether inonyanya kushandiswa kuChina iHPMC.
Cellulose ether inonyanya kushandiswa semvura yekuchengetedza mvura uye thickener mune simende-based zvinhu.
Basa rayo rekuchengetedza mvura rinogona kudzivirira substrate kuti irege kutora mvura yakawandisa nokukurumidza uye inodzivisa kubuda kwemvura, kuitira kuti ive nechokwadi chokuti simenti ine mvura yakakwana kana ichinyudzwa. Tora basa rekupurasita semuenzaniso. Kana yakajairwa simende slurry yakaiswa pamusoro peiyo substrate, iyo yakaoma uye ine porous substrate inokurumidza kutora yakawanda yemvura kubva kune slurry, uye simende slurry layer iri padyo ne substrate inorasikirwa nyore hydration yayo. Nokudaro, kwete chete haigoni kuumba simenti gel ine simba rekunamatira pamusoro pe substrate, asiwo nyore kukonzera warping uye mvura seepage, kuitira kuti pasi simende slurry layer iri nyore kudonha. Apo grout yakashandiswa yakatetepa, zviri nyorewo kuumba kuputika mune grout yose. Naizvozvo, munguva yakapfuura pamusoro pekuisa plastering, hwaro hwacho hwaiwanzonyoroveswa nemvura kutanga, asi kuvhiya uku kwainyanya kushanda uye kwaitora nguva, uye kunaka kwekushanda kwaive kwakaoma kudzora.
Kazhinji kutaura, kuchengetwa kwemvura ye simenti slurry kunowedzera nekuwedzera kwemukati we cellulose ether. Iyo yakakura viscosity yeakawedzera cellulose ether, zviri nani kuchengetedza mvura.
Pamusoro pekuchengetedza mvura uye kukora, cellulose ether inokanganisawo zvimwe zvinhu zvesamende dhaka, senge retarding, intraining mhepo, uye kuwedzera bond simba. Cellulose ether inononoka kugadzirisa uye kuomeswa kwesimende, zvichiita kuti iwedzere nguva yekushanda, saka dzimwe nguva inoshandiswa semugadziri wekugadzirisa.
Nekuvandudzwa kwedhaka rakaoma-musanganiswa, cellulose ether yave yakakosha sement mortar admixture. Nekudaro, kune akawanda emhando uye zvirevo zve cellulose ether, uye mhando pakati pemabhechi ichiri kuchinja.
Uyewo unofanirwa kuchenjerera paunenge uchishandisa:
1. Maitiro ekushanda kwedhaka yakagadziridzwa anonyatsoenderana nekukura kwe viscosity ye cellulose ether. Kunyangwe zvigadzirwa zvine yakakwira zita viscosity zvine yakakwira yekupedzisira viscosity, nekuda kwekunonoka kupera, zvinotora nguva yakareba kuti uwane iyo yekupedzisira viscosity; nekuwedzera, Iyo cellulose ether ine coarser particles inotora nguva yakareba kuti iwane yekupedzisira viscosity, saka chigadzirwa chine viscosity yakakwirira haifaniri kunge iine zviri nani kushanda maitiro.
2. Nekuda kwekuganhurwa kwedhigirii repolymerization ye cellulose ether raw materials, iyo yakanyanya viscosity ye cellulose ether inogumirawo.
3. Izvo zvinodiwa kuti utarise kutenga, maitiro ekugadzira uye kuongorora fekitori kudzivirira kushanduka kwemhando.
Nguva yekutumira: Mar-29-2023