Ether starch na cellulose ether bụ ụdị ihe ndị e ji eme ka ether dị iche iche, ọkachasị n'ihe owuwu na ihe mkpuchi. Ọ bụ ezie na ha nwere ụfọdụ myirịta n'ihe gbasara ịbụ polima mmiri na-agbaze ma na-eme ka ọ sie ike, e nwere ihe dị iche n'etiti ha, karịsịa n'ihe gbasara isi iyi ha na nhazi kemịkalụ ha.
Eta starch:
1. Isi mmalite:
- Mmalite Eke: A na-esi na starch, nke bụ carbohydrate dị n'ime osisi enweta starch ether. A na-esikarị na ihe ọkụkụ dịka ọka, poteto, ma ọ bụ aki.
2. Nhazi Kemịkalụ:
- Ihe mejupụtara Polymer: Starch bụ polysaccharide nke mejupụtara nkeji glucose nke ejiri njikọ glycosidic jikọta. Starch ethers bụ ihe ndị sitere na starch gbanwere agbanwe, ebe a na-eji otu ether dochie otu hydroxyl dị na molekul starch.
3. Ngwa:
- Ụlọ Ọrụ Mmepụta Ihe: A na-ejikarị starch ether eme ihe n'ụlọ ọrụ ihe owuwu dị ka ihe mgbakwunye na ngwaahịa gypsum, mort, na ihe ndị e ji simenti mee. Ha na-enyere aka ime ka ọrụ dịkwuo mma, idobe mmiri, na ịrapara.
4. Ụdị ndị a na-ahụkarị:
- Hydroxyethyl Starch (HES): Otu ụdị starch ether a na-ahụkarị bụ hydroxyethyl starch, ebe a na-ewebata otu hydroxyethyl iji gbanwee nhazi starch ahụ.
Cellulose Ether:
1. Isi mmalite:
- Mmalite Eke: A na-enweta cellulose ether site na cellulose, polima eke a na-ahụ na mgbidi sel nke osisi. Ọ bụ isi ihe dị na mgbidi sel osisi ma a na-ewepụta ya site na isi mmalite dịka osisi pulp ma ọ bụ owu.
2. Nhazi Kemịkalụ:
- Ihe mejupụtara Polymer: Cellulose bụ polima kwụ ọtọ nke nwere nkeji glucose jikọtara ya na njikọ β-1,4-glycosidic. Cellulose ethers bụ ihe sitere na cellulose, ebe a na-agbanwe otu hydroxyl dị na molekul cellulose na otu ether.
3. Ngwa:
- Ụlọ Ọrụ Mmepe: A na-eji cellulose ethers eme ihe nke ọma n'ụlọ ọrụ ihe owuwu, dị ka starch ethers. A na-eji ha eme ihe na ngwaahịa simenti, ihe nrapado taịlị, na ngwa agha iji mee ka mmiri dịgide, rụọ ọrụ, na njikọta dịkwuo mma.
4. Ụdị ndị a na-ahụkarị:
- Hydroxyethyl Cellulose (HEC): Otu ụdị cellulose ether a na-ahụkarị bụ hydroxyethyl cellulose, ebe a na-ewebata otu hydroxyethyl iji gbanwee nhazi cellulose.
- Methyl Cellulose (MC): Ụdị ọzọ a na-ahụkarị bụ methyl cellulose, ebe a na-ewebata otu methyl.
Isi ihe dị iche:
1. Isi mmalite:
- A na-esi na starch, carbohydrate dị n'ime osisi, enweta starch ether.
- A na-enweta cellulose ether site na cellulose, ihe dị mkpa na mgbidi mkpụrụ osisi.
2. Nhazi Kemịkalụ:
- Isi polima maka starch ether bụ starch, polysaccharide nke mejupụtara glucose units.
- Ihe bụ isi polima maka cellulose ether bụ cellulose, polima linear nke mejupụtara glucose units.
3. Ngwa:
- A na-eji ụdị ether abụọ a eme ihe n'ụlọ ọrụ owuwu, mana ojiji na usoro pụrụ iche nwere ike ịdị iche.
4. Ụdị ndị a na-ahụkarị:
- Hydroxyethyl starch (HES) na hydroxyethyl cellulose (HEC) bụ ihe atụ nke ihe ndị ether mepụtara.
ebe starch ether na cellulose ether bụ polima mmiri na-agbaze agbaze nke a na-eji dị ka ihe mgbakwunye n'ọtụtụ ngwa, isi iyi ha, polima isi ha, na nhazi kemịkalụ pụrụ iche dị iche. Ọdịiche ndị a nwere ike imetụta arụmọrụ ha na nhazi na ojiji ụfọdụ.
Oge ozi: Jenụwarị-06-2024