Starch ether na cellulose ether bụ ụdị nke ether ether eji eme ihe na ụlọ ọrụ dị iche iche, karịsịa na-ewu na mkpuchi.Ọ bụ ezie na ha na-ekerịta ụfọdụ myirịta n'ihe gbasara ịbụ polymers soluble mmiri nwere ihe na-eme ka ọ sie ike na nkwụsi ike, enwere ọdịiche dị n'etiti ha, bụ isi na isi mmalite ha na usoro kemịkal.
Starch Ether:
1. Isi mmalite:
- Mmalite eke: Starch ether sitere na starch, nke bụ carbohydrate dị na osisi.A na-ewepụtakarị starch n'ihe ọkụkụ dị ka ọka, poteto, ma ọ bụ akpụ.
2. Ọdịdị kemịkalụ:
- Ihe mejupụtara polymer: Starch bụ polysaccharide mejupụtara nkeji glucose jikọtara ya na njikọ glycosidic.Starch ethers bụ ihe eji eme starch emezigharị, ebe a na-eji otu ether dochie otu hydroxyl dị na molekul starch.
3. Ngwa:
- Ụlọ ọrụ ihe owuwu: A na-ejikarị ethers starch eme ihe na ụlọ ọrụ mmepụta ihe dị ka ihe mgbakwunye na ngwaahịa gypsum, ngwa agha, na ihe ndị dabeere na ciment.Ha na-enye aka n'ịrụ ọrụ nke ọma, njide mmiri, na nrapado.
4. Ụdị nkịtị:
- Hydroxyethyl Starch (HES): Otu ụdị starch ether a na-ahụkarị bụ hydroxyethyl starch, ebe a na-ewebata otu hydroxyethyl iji gbanwee nhazi starch.
Cellulose ether:
1. Isi mmalite:
- Mmalite eke: Cellulose ether sitere na cellulose, polymer eke dị na mgbidi cell nke osisi.Ọ bụ akụkụ bụ isi nke mgbidi cell osisi na-esi na isi mmalite dị ka osisi pulp ma ọ bụ owu.
2. Ọdịdị kemịkalụ:
- Ihe mejupụtara polymer: Cellulose bụ polymer linear nke nwere nkeji glucose jikọtara ya na njikọ β-1,4-glycosidic.Cellulose ethers bụ mmepụta nke cellulose, ebe hydroxyl dị iche iche na cellulose molecule na-gbanwere na ether otu.
3. Ngwa:
- Industrylọ ọrụ ihe owuwu: Cellulose ethers na-ahụta ojiji zuru ebe niile na ụlọ ọrụ ihe owuwu, dị ka starch ethers.A na-eji ha na ngwaahịa simenti, ihe ntanye taịlị, na ngwa agha iji kwalite njide mmiri, ịrụ ọrụ, na nrapado.
4. Ụdị nkịtị:
- 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.
Ọdịiche dị mkpa:
1. Isi mmalite:
- Starch ether sitere na starch, carbohydrate dị na osisi.
- Cellulose ether sitere na cellulose, bụ isi akụkụ nke mgbidi cell osisi.
2. Ọdịdị kemịkalụ:
- polymer isi maka ether starch bụ starch, polysaccharide nke mejupụtara nkeji glucose.
Ihe ndabere maka cellulose ether bụ cellulose, polymer linear nke mejupụtara nkeji glucose.
3. Ngwa:
- A na-eji ụdị ethers abụọ ahụ na ụlọ ọrụ ihe owuwu, mana ngwa na nhazi pụrụ iche nwere ike ịdị iche.
4. Ụdị nkịtị:
- Hydroxyethyl starch (HES) na hydroxyethyl cellulose (HEC) bụ ihe atụ nke ether ndị a.
mgbe starch ether na cellulose ether bụ ma mmiri-soluble polymers eji dị ka mgbakwunye na dị iche iche ngwa, ha isi iyi, isi polymer, na kpọmkwem chemical owuwu dị iche.Ndịiche ndị a nwere ike imetụta arụmọrụ ha na nhazi na ngwa dị iche iche.
Oge nzipu: Jan-06-2024