Ndezvipi zvakasiyana-siyana zve cellulose ether? Ndeapi maitiro?

Cellulose ethers iboka rakasiyana siyana remapolymers anobva ku cellulose, yakasikwa polysaccharide inowanikwa muzvirimwa. Iwo anoshandiswa zvakanyanya mumaindasitiri akasiyana siyana, anosanganisira ekuvaka, emishonga, chikafu, uye kutarisirwa kwevanhu, nekuda kwezvakasiyana zvivakwa uye kuita zvakasiyana. Heano mamwe emhando dzakasiyana dze cellulose ether uye maitiro avo:

1. Methyl Cellulose (MC):
   • Hunhu:
     • Methyl cellulose i polymer inonyungudika nemvura inotorwa kubva muselulosi nekuibata nemethyl chloride.
     • Iyo kazhinji haina kunhuhwirira, inoravira, uye isina chepfu, ichiita kuti ive yakakodzera kushandiswa mune dzakasiyana siyana dzekushandisa.
     • MC inoratidzira yakanakisa kuchengetedza mvura zvivakwa, zvichiita kuti ive yakanaka yekuwedzera kune simende-based madhaka, gypsum-based plasters, uye mataira anonamira.
     • Inovandudza kushanda, kunamatira, uye nguva yakavhurika mune zvekuvaka, ichibvumira kushandiswa kuri nyore uye kuita zvirinani.
     • Methyl cellulose inowanzoshandiswa seyakakora mumiriri, stabilizer, uye emulsifier muzvigadzirwa zvechikafu, mishonga, uye zvizorwa.
2. Hydroxyethyl Cellulose (HEC):
   • Hunhu:
     • Hydroxyethyl cellulose inogadzirwa nekuita cellulose ine ethylene oxide kuunza mapoka ehydroxyethyl pamusana we cellulose.
     • Inonyungudika mumvura inotonhora uye inoumba yakajeka, viscous mhinduro ine yakanakisa yekuchengetedza mvura zvivakwa.
     • HEC inowanzoshandiswa seyakakora, rheology modifier, uye firimu-forming agent mune akasiyana maapplication, anosanganisira pendi, anonamira, zvigadzirwa zvekuchengeta munhu, uye mishonga yemishonga.
     • Muzvivakwa zvekuvaka, HEC inovandudza kushanda, sag kuramba, uye kubatana, zvichiita kuti ive yakakodzera kushandiswa mune cementitious uye gypsum-based formulations.
     • HEC inopawo pseudoplastic kuyerera maitiro, zvichireva kuti viscosity yayo inoderera pasi pekunetseka kwekugera, kufambisa nyore kushandisa uye kupararira.
3. Hydroxypropyl Methyl Cellulose (HPMC):
   • Hunhu:
     • Hydroxypropyl methyl cellulose is cellulose ether inogadzirwa nekuunza hydroxypropyl uye methyl mapoka pane cellulose musana.
     • Inoratidza zvivakwa zvakafanana nezvose methyl cellulose uye hydroxyethyl cellulose, kusanganisira kunyungudika kwemvura, kugona kugadzira firimu, uye kuchengetedza mvura.
     • HPMC inoshandiswa zvakanyanya mukuvaka zvinhu zvakaita semataira anonamira, simende-based renders, uye yekuzvimisa-leveling makomisheni kuvandudza kushanda, kunamatira, uye kuenderana.
     • Iyo inopa yakanakisa kukora, kusunga, uye yekuzora zvivakwa mumasisitimu ane aqueous uye inopindirana nezvimwe zvinowedzera zvinowanzo shandiswa mukuvaka maumbirwo.
     • HPMC inoshandiswawo mumishonga, zvigadzirwa zvechikafu, uye zvinhu zvekuchengeta munhu sechinhu chinogadzika, chinomisa mumiriri, uye viscosity modifier.
4. Carboxymethyl Cellulose (CMC):
   • Hunhu:
     • Carboxymethyl cellulose is a cellulose ether inotorwa mu cellulose nekuibata ne sodium hydroxide uye monochloroacetic acid kuunza carboxymethyl mapoka.
     • Iyo inonyungudika mumvura uye inoumba yakajeka, viscous mhinduro ine yakanakisa kukora, kudzikamisa, uye kuchengetedza mvura zvivakwa.
     • CMC inowanzoshandiswa seyakakora, binder, uye rheology modifier mumaindasitiri akasiyana, kusanganisira chikafu, mishonga, machira, uye mapepa.
     • Muzvivakwa zvekuvaka, CMC dzimwe nguva inoshandiswa sechinhu chinochengeta mvura mumadhaka-samende uye magrouts, kunyangwe isingawande kupfuura mamwe ma cellulose ether nekuda kwemutengo wayo wakakwira uye kuderera kuenderana nemasisitimu esimende.
     • CMC inoshandiswawo mukugadzirwa kwemishonga semumiriri wekumisa, piritsi binder, uye inodzorwa-kuburitsa matrix.

Aya ndiwo mamwe emhando dzakajairika dze cellulose ether, imwe neimwe inopa yakasarudzika zvivakwa uye mabhenefiti kune akasiyana maapplication. Pakusarudza cellulose ether kune chaiyo application, zvinhu zvakaita sekunyungudika, viscosity, kuenderana nezvimwe zvinowedzera, uye inodiwa maitiro ekuita zvinofanirwa kutariswa.