Teknụzụ nke Cellulose Ethers

Teknụzụ nkecellulose ethersna-agụnye mgbanwe nke cellulose, polymer eke sitere na mgbidi cell osisi, iji mepụta ihe ndị nwere ihe ndị dị na ya na arụmọrụ. Ethers cellulose kachasị na-agụnye Hydroxypropyl Methylcellulose (HPMC), Carboxymethyl Cellulose (CMC), Hydroxyethyl Cellulose (HEC), Methyl Cellulose (MC), na Ethyl Cellulose (EC). Nke a bụ nkọwapụta nke teknụzụ ejiri na mmepụta nke cellulose ethers:

1. Akụrụngwa:
   • Isi mmalite Cellulose: Ihe bụ isi maka cellulose ethers bụ cellulose, nke a na-enweta site na osisi pulp ma ọ bụ owu. Isi iyi cellulose na-emetụta njirimara nke ngwaahịa ether cellulose ikpeazụ.
2. Nkwadebe nke cellulose:
   • Pulping: A na-edobe ahịhịa osisi ma ọ bụ owu na-agbari usoro iji gbajie eriri cellulose ka ọ bụrụ ụdị a na-ejikwa ya.
   • Nchacha: A na-eme ka cellulose dị ọcha iji wepụ ihe ndị na-adịghị ọcha na lignin, na-ebute ihe cellulose dị ọcha.
3. Mgbanwe kemịkalụ:
   • Mmeghachi omume Etherification: Nzọụkwụ bụ isi na mmepụta cellulose ether bụ mgbanwe kemịkalụ nke cellulose site na mmeghachi omume etherification. Nke a gụnyere iwebata otu ether (dịka ọmụmaatụ, hydroxyethyl, hydroxypropyl, carboxymethyl, methyl, ma ọ bụ ethyl) na otu hydroxyl na agbụ cellulose polymer.
   • Nhọrọ nke Reagents: A na-ejikarị reagents dị ka ethylene oxide, propylene oxide, sodium chloroacetate, ma ọ bụ methyl chloride na mmeghachi omume ndị a.
4. Njikwa Mmeghachi omume:
   • Okpomọkụ na Nrụgide: A na-eme mmeghachi omume etherification n'okpuru ọnọdụ okpomọkụ na-achịkwa iji nweta ogo achọrọ nke nnọchi (DS) ma zere mmeghachi omume akụkụ.
   • Ọnọdụ Alkaline: A na-eme ọtụtụ mmeghachi omume etherification n'okpuru ọnọdụ alkaline, a na-enyochakwa pH nke ngwakọta mmeghachi omume nke ọma.
5. Nsacha:
   • Neutralization: Mgbe mmeghachi omume etherification gasịrị, a na-ewepụkarị ngwaahịa ahụ iji wepu oke reagents ma ọ bụ ngwaahịa.
   • Ịsacha: A na-asa cellulose emezigharịrị iji kpochapụ kemịkalụ na adịghị ọcha.
6. ihicha:
   • A na-akpọnwụ ether cellulose dị ọcha iji nweta ngwaahịa ikpeazụ na ntụ ntụ ma ọ bụ ụdị granular.
7. Njikwa ogo:
   • Nyocha: A na-eji usoro nyocha dị iche iche, dị ka ihe nleba anya nke resonance nuklia (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, na chromatography, iji nyochaa nhazi na njirimara nke cellulose ethers.
   • Degree of nnọchi (DS): DS, nke na-anọchi anya nkezi ọnụ ọgụgụ nke ndị nọchiri anya otu anhydroglucose, bụ oke dị oke mkpa a na-achịkwa n'oge mmepụta.
8. Nhazi na ngwa:
   • Nhazi onye ọrụ njedebe: Cellulose ethers na-enye ndị ọrụ njedebe na ụlọ ọrụ dị iche iche, gụnyere ihe owuwu, ọgwụ, nri, nlekọta onwe onye, ​​​​na mkpuchi.
   • Ngwa-Ọrịa dị iche iche: A na-emepụta ọkwa dị iche iche nke cellulose ethers iji mezuo ihe achọrọ nke ngwa dị iche iche.
9. Nnyocha na ihe ọhụrụ:
   • Ọganihu na-aga n'ihu: Ọrụ nyocha na mmepe na-elekwasị anya n'ịkwalite usoro mmepụta ihe, ịkwalite arụmọrụ nke cellulose ethers, na ịchọgharị ngwa ọhụrụ.

Ọ dị mkpa ịmara na teknụzụ maka imepụta ether cellulose kpọmkwem nwere ike ịdịgasị iche dabere na akụrụngwa na ngwa achọrọ. Mgbanwe a na-achịkwa nke cellulose site na mmeghachi omume etherification na-enye ohere maka ọtụtụ cellulose ethers nwere ọrụ dịgasị iche iche, na-eme ka ha baa uru na ụlọ ọrụ dị iche iche.