Starch ethers na cellulose ethers bụ ma ethers na-arụ ọrụ dị mkpa na ụlọ ọrụ dị iche iche, karịsịa na-ewu na dị ka ihe mgbakwunye na ngwaahịa dị iche iche.Ọ bụ ezie na ha nwere ụfọdụ myirịta, ha bụ ogige dị iche iche nwere ụdị kemịkal dị iche iche, ihe onwunwe na ngwa.
1.Chemical Ọdịdị:
Starch ether:
A na-enweta starch ethers site na starch, polysaccharide nke mejupụtara nkeji glucose.Ọdịdị kemịkalụ nke starch nwere ihe abụọ bụ isi: amylose (agbụ nke mkpụrụ ndụ glucose na-ejikọta ya na njikọ α-1,4-glycosidic) na amylopectin (nwere α-1,4 na α-1,6- polymers nke nwere njikọ glycosidic). ) kọntaktị.A na-enweta starch ethers site n'ịgbanwe otu hydroxyl nke starch site na usoro etherification.
Cellulose ether:
Cellulose, n'aka nke ọzọ, bụ polysaccharide ọzọ, mana nhazi ya nwere nkeji glucose jikọtara ya na njikọ β-1,4-glycosidic.A na-enweta cellulose ethers site na cellulose site na usoro etherification yiri ya.Ejikọtara nkeji ugboro ugboro na cellulose site na njikọ beta, na-akpụ usoro ahịrị na kristal nke ukwuu.
2. Isi mmalite:
Starch ether:
Starch na-esite na osisi dịka ọka, ọka wit na poteto.Osisi ndị a bụ ebe nchekwa starch na starch ethers nwere ike ịwepụta ma hazie ya.
Cellulose ether:
Cellulose bụ isi akụkụ nke mgbidi cell osisi ma dị ebe niile na okike.Isi mmalite nke cellulose na-agụnye pulp osisi, owu, na eriri osisi dị iche iche.A na-emepụta ethers cellulose site n'ịgbanwe mkpụrụ ndụ cellulose ewepụtara na ebe ndị a.
3. Usoro etherification:
Starch ether:
Usoro etherification nke starch gụnyere iwebata otu ether n'ime otu hydroxyl (OH) dị na mkpụrụ ndụ starch.Otu ether nkịtị agbakwunyere gụnyere methyl, ethyl, hydroxyethyl, na hydroxypropyl, na-ebute mgbanwe na njirimara nke starch emezigharịrị.
Cellulose ether:
Etherification nke cellulose gụnyere usoro yiri nke ahụ nke ether dị iche iche na-abanye n'ime ìgwè hydroxyl nke cellulose.Mwepụta nke cellulose ether a na-ahụkarị gụnyere methylcellulose, ethylcellulose, hydroxyethylcellulose na carboxymethylcellulose.
4. Solubility:
Starch ether:
Starch ether n'ozuzu nwere obere mmiri solubility karịa cellulose ethers.Dabere na otu ether akọwapụtara n'oge mgbanwe, ha nwere ike igosipụta ogo dị iche iche nke solubility.
Cellulose ether:
A maara ethers cellulose maka ihe ndị na-agbaze mmiri ma ọ bụ na-ekesa mmiri.Solubility dabere na ụdị na ogo nke nnọchi ether.
5. Ịrụ ihe nkiri:
Starch ether:
Starch ether n'ozuzu nwere oke ime ihe nkiri n'ihi ọdịdị nke ọkara kristal ha.Ihe nkiri a na-esi na ya pụta nwere ike ịbụ nke na-enweghị nghọta na nke na-adịghị agbanwe agbanwe karịa ihe nkiri sitere na cellulose ethers.
Cellulose ether:
Cellulose ethers, karịsịa ụfọdụ usoro dị ka methylcellulose, bụ ndị a maara maka ọmarịcha ihe na-emepụta ihe nkiri.Ha nwere ike ịmepụta ihe nkiri doro anya ma na-agbanwe agbanwe, na-eme ka ha baa uru na ngwa ndị dị ka mkpuchi na nrapado.
6.Rheological Njirimara:
Starch ether:
Starch ethers nwere ike ịbawanye viscosity nke mmiri mmiri ngwọta, ma ha rheological omume nwere ike ịdị iche na cellulose ethers.Mmetụta dị na viscosity na-adabere na ihe ndị dị ka ogo nke nnọchi na ịdị arọ molecular.
Cellulose ether:
A na-amatakarị ethers cellulose maka ike njikwa rheology ha.Ha nwere ike imetụta viscosity nke ukwuu, njide mmiri na ihe ndị na-asọpụta na ngwa dị iche iche gụnyere agba, nrapado na ihe owuwu.
7. Ngwa:
Starch ether:
Enwere ike iji starch ethers na nri, textile na ụlọ ọrụ ọgwụ.N'ime ụlọ ọrụ ihe owuwu, a na-eji ngwa agha, plasta na adhesives kwalite ihe ndị dị ka njide mmiri na ịrụ ọrụ.
Cellulose ether:
A na-ejikarị ethers cellulose eme ihe na ọgwụ, nri, ihe ịchọ mma na ogige ihe owuwu.A na-ejikarị ha eme ihe dị ka ndị na-agbapụta, stabilizers na rheology modifiers na agba, ngwa agha, adhesives tile na ụdị dị iche iche.
8. Mmebi ndụ:
Starch ether:
Starch ethers sitere na osisi ma bụrụ nke a na-enwekarị ike imebi.Ha na-enyere aka ịbawanye nkwado nke ngwaahịa eji eme ihe.
Cellulose ether:
Cellulose ethers ewepụtara na cellulose osisi bụkwa ihe na-emebi emebi.Ndakọrịta gburugburu ebe obibi ha bụ isi uru na ngwa ebe nkwado dị mkpa.
na ngwụcha:
Ọ bụ ezie na starch ethers na cellulose ethers na-ekerịta ụfọdụ ihe ndị a na-ahụkarị dị ka ihe mmepụta nke polysaccharide, ụdị kemịkalụ ha pụrụ iche, isi mmalite, solubility, ihe ndị na-emepụta ihe nkiri, omume rheological na ngwa na-ekewapụ ha maka iji mee ihe n'ubi dị iche iche.Starch ethers sitere na starch na cellulose ethers nke sitere na cellulose nke ọ bụla nwere uru pụrụ iche na ọnọdụ dị iche iche.Ịghọta ọdịiche ndị a dị oke mkpa maka ịhọrọ ether ziri ezi maka otu ngwa ngwa, na-eme ka arụmọrụ dị mma na njirimara achọrọ.
Oge nzipu: Jan-25-2024