Starch ether ne cellulose ether zvese zviri zviviri mhando dze ether derivatives dzinoshandiswa mumaindasitiri akasiyana-siyana, kunyanya mukuvaka nekugadzira. Kunyange zvazvo zvakafanana pakuva mapolymer anonyungudika mumvura ane hunhu hwekukora uye kugadzikana, pane musiyano mukuru pakati pawo, kunyanya mukwaanobva uye chimiro chemakemikari.
Starch Ether:
1. Kwakabva:
- Kwakatangira Zvisikwa: Starch ether inobva mustarch, inova carbohydrate inowanikwa mumiti. Starch inowanzo torwa kubva muzvirimwa zvakaita sechibage, mbatatisi, kana mufarinya.
2. Maumbirwo emakemikari:
- Kuumbwa kwePolymer: Starch ipolysaccharide inoumbwa nemayuniti eglucose akabatana neglycosidic bonds. Starch ethers imhando yestarch yakagadziriswa, uko mapoka ehydroxyl ari pamorekuru yestarch anotsiviwa nemapoka eether.
3. Mashandisirwo:
- Indasitiri yeKuvaka: Mastarch ether anowanzo shandiswa muindasitiri yekuvaka sezvinhu zvinowedzerwa muzvigadzirwa zvegypsum, mamortar, uye zvinhu zvakagadzirwa nesimende. Anobatsira pakuvandudza kushanda, kuchengetedza mvura, uye kunamira.
4. Mhando Dzakajairika:
- Hydroxyethyl Starch (HES): Imwe mhando ye starch ether inowanzo shandiswa i hydroxyethyl starch, uko mapoka e hydroxyethyl anounzwa kuti achinje chimiro che starch.
Cellulose Ether:
1. Kwakabva:
- Kwakatangira: Cellulose ether inobva ku cellulose, polymer yechisikigo inowanikwa mumadziro esero emiti. Ndiyo chikamu chikuru chemadziro esero remiti uye inotorwa kubva kunzvimbo dzakadai sehuni kana donje.
2. Maumbirwo emakemikari:
- Kuumbwa kwePolymer: Cellulose ipolymer yakatsetseka ine mayuniti eglucose akabatana ne β-1,4-glycosidic bonds. Cellulose ethers zvinobva mu cellulose, uko mapoka e hydroxyl ari pa cellulose molecule anochinjwa nemapoka e ether.
3. Mashandisirwo:
- Indasitiri yeKuvaka: Cellulose ethers inoshandiswa zvakanyanya muindasitiri yekuvaka, zvakafanana nestarch ethers. Inoshandiswa muzvigadzirwa zvesimende, zvinonamira mataira, uye zvidhinha kuti iwedzere kuchengetedza mvura, kushanda zvakanaka, uye kunamira.
4. Mhando Dzakajairika:
- Hydroxyethyl Cellulose (HEC): Imwe mhando ye cellulose ether inowanzo shandiswa i hydroxyethyl cellulose, uko mapoka e hydroxyethyl anounzwa kuti achinje chimiro che cellulose.
- Methyl Cellulose (MC): Imwe mhando yakajairika imethyl cellulose, uko mapoka emethyl anounzwa.
Misiyano mikuru:
1. Kwakabva:
- Starch ether inobva kustarch, kabhohaidhiretsi inowanikwa mumiti.
- Cellulose ether inobva ku cellulose, chinhu chikuru chiri mumadziro emasero emiti.
2. Maumbirwo emakemikari:
- Iyo base polymer ye starch ether istarch, polysaccharide inoumbwa nemayuniti eglucose.
- Iyo base polymer ye cellulose ether i cellulose, iyo linear polymer inoumbwa nema glucose units.
3. Mashandisirwo:
- Mhando dzese dze ether dzinoshandiswa muindasitiri yekuvaka, asi mashandisirwo chaiwo uye mafomura anogona kusiyana.
4. Mhando Dzakajairika:
- Hydroxyethyl starch (HES) uye hydroxyethyl cellulose (HEC) mienzaniso yeizvi ether derivatives.
nepo starch ether ne cellulose ether zviri mapolymer anonyungudika mumvura anoshandiswa sezvinowedzera mukushandiswa kwakasiyana-siyana, kwavanobva, base polymer, uye maumbirwo chaiwo emakemikari akasiyana. Kusiyana uku kunogona kukanganisa mashandiro azvo mumafomula nemashandisirwo chaiwo.
Nguva yekutumira: Ndira-06-2024