Chii chinonzi Cellulose ethers

Cellulose ethers imhuri yemakemikari emusanganiswa anotorwa kubva ku cellulose, yakasikwa polymer inowanikwa musero madziro emiti. Izvi zvinobva zvagadzirwa kuburikidza nekugadziriswa kwemakemikari emamorekuru e cellulose kuunza akasiyana mapoka anoshanda, zvichikonzera kuwanda kwezvivakwa uye mashandisirwo. Cellulose ethers inowanzoshandiswa mumaindasitiri akadai sekuvaka, mishonga, chikafu, zvizorwa, uye kutarisirwa kwevanhu nekuda kwehunhu hwavo hwakasiyana-siyana uye zvinobatsira zvinhu. Heano mamwe marudzi akajairika e-cellulose ethers uye mashandisiro awo:

1. Methyl Cellulose (MC):
   • Methyl cellulose inogadzirwa nekurapa cellulose nemethyl chloride.
   • Inonyungudika mumvura uye inoumba zvakajeka, zvinogadzirisa zvinogadzirisa.
   • MC inoshandiswa seyakakora, bhainda, uye inodzikamisa muzvinhu zvekuvakisa (semuenzaniso, simende-based motars, gypsum-based plasters), zvigadzirwa zvekudya, mishonga, uye zvinhu zvekuchengeta munhu.
2. Hydroxyethyl Cellulose (HEC):
   • Hydroxyethyl cellulose inogadzirwa nekuita cellulose ine ethylene oxide kuunza hydroxyethyl mapoka.
   • Inonyungudika mumvura uye inoumba yakajeka, viscous mhinduro ine yakanakisa yekuchengetedza mvura zvivakwa.
   • HEC inowanzoshandiswa seyakakora, rheology modifier, uye firimu-forming agent mupendi, zvinonamira, zvigadzirwa zvekuchengeta munhu, uye mishonga yemishonga.
3. Hydroxypropyl Methyl Cellulose (HPMC):
   • Hydroxypropyl methyl cellulose 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 (semuenzaniso, zvinonamira mataira, simende-based renders, self-leveling compounds), pamwe nemishonga, zvigadzirwa zvekudya, uye zvinhu zvekuchengeta munhu.
4. Carboxymethyl Cellulose (CMC):
   • Carboxymethyl cellulose inotorwa kubva ku 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 muzvigadzirwa zvekudya, mishonga, machira, mapepa, uye zvimwe zvekuvaka.

Aya ndiwo mamwe anonyanya kushandiswa cellulose ethers, imwe neimwe iine akasiyana zvivakwa uye mashandisirwo mumaindasitiri akasiyana. Mamwe hunyanzvi cellulose ethers anogonawo kuvepo, akagadzirirwa kune chaiwo zvinodiwa mumashandisirwo akasiyana.