Teknụzụ nke Cellulose Ethers
Teknụzụ nkecellulose ethersna-agụnye mgbanwe nke cellulose, polymer eke sitere na mgbidi cell osisi, na-emepụta ihe ndị nwere ihe onwunwe 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:
- 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.
- 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.
- 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.
- 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.
- 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 a gbanwere iji kpochapụ kemịkalụ na adịghị ọcha.
- ihicha:
- A na-akpọnwụ ether cellulose dị ọcha iji nweta ngwaahịa ikpeazụ na ntụ ntụ ma ọ bụ ụdị granular.
- 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.
- 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.
- 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 ethers 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.
Oge nzipu: Jan-20-2024