Chii chinonzi Cellulose ethers

Cellulose ethers imhuri yemakemikari anobva ku cellulose, iyo polymer yechisikigo inowanikwa mumadziro esero emiti. Izvi zvinogadzirwa kuburikidza nekushandurwa kwemakemikari emamorekuru e cellulose kuti zviunze mapoka akasiyana-siyana anoshanda, zvichikonzera mhando dzakasiyana dzezvinhu uye mashandisirwo. Cellulose ethers dzinowanzo shandiswa mumaindasitiri akadai sekuvaka, mishonga, chikafu, zvizoro, uye kutarisirwa kwemunhu nekuda kwehunhu hwadzo hunoshandiswa zvakasiyana-siyana uye hunhu hunobatsira. Heano mamwe marudzi akajairika e cellulose ethers uye mashandisirwo awo:

1. Methyl Cellulose (MC):
   • Methyl cellulose inogadzirwa nekushandisa methyl chloride mukurapa cellulose.
   • Inonyungudika mumvura uye inoumba mhinduro dzakajeka, dzakasimba.
   • MC inoshandiswa sechinhu chinosimbisa, chinosunga, uye chinosimbisa zvinhu zvekuvaka (semuenzaniso, madhaka akagadzirwa nesimende, madhaka akagadzirwa negypsum), zvigadzirwa zvekudya, mishonga, uye zvinhu zvekuchengetedza munhu.
2. Hydroxyethyl Cellulose (HEC):
   • Hydroxyethyl cellulose inogadzirwa nekubatanidza cellulose ne ethylene oxide kuti iunze mapoka e hydroxyethyl.
   • Inonyungudika mumvura uye inoumba mhinduro dzakajeka, dzakasimba dzine hunhu hwakanaka hwekuchengetedza mvura.
   • HEC inowanzoshandiswa sechinhu chinosimbisa ganda, chinogadzirisa rheology, uye chinoumba firimu mumapendi, zvinonamira, zvigadzirwa zvekuchengetedza muviri, uye mishonga.
3. Hydroxypropyl Methyl Cellulose (HPMC):
   • Hydroxypropyl methyl cellulose inogadzirwa nekuunza mahydroxypropyl ne methyl groups kumusana we cellulose.
   • Inoratidza hunhu hwakafanana nemethyl cellulose nehydroxyethyl cellulose, kusanganisira kunyungudika kwemvura, kugona kugadzira firimu, uye kuchengetedza mvura.
   • HPMC inoshandiswa zvakanyanya muzvinhu zvekuvaka (semuenzaniso, zvinonamira mataira, zvinogadzirwa nesimende, zvinosanganisa simbi), pamwe chete nemishonga, zvigadzirwa zvekudya, uye zvinhu zvekuchengetedza munhu.
4. Carboxymethyl Cellulose (CMC):
   • Carboxymethyl cellulose inotorwa kubva ku cellulose nekuirapa ne sodium hydroxide uye monochloroacetic acid kuti iunze mapoka e carboxymethyl.
   • Inonyungudika mumvura uye inoumba mhinduro dzakajeka, dzakasimba dzine hunhu hwakanaka hwekukora, kugadzikana, uye kuchengetedza mvura.
   • CMC inowanzoshandiswa sechinhu chinosimbisa, chinosunga, uye chinogadzirisa rheology mune zvekudya, mishonga, machira, bepa, nezvimwe zvinhu zvekuvaka.

Aya ndiwo mamwe ema cellulose ether anonyanya kushandiswa, rimwe nerimwe rine hunhu hwakasiyana uye mashandisirwo akasiyana mumaindasitiri akasiyana. Mamwe ma cellulose ethers akakosha anogonawo kuvapo, akagadzirirwa zvinodiwa zvakasiyana mumashandisirwo akasiyana.