Nkwadebe nke cellulose ethers

Nkwadebe nkecellulose ethersna-agụnye kemịkal na-agbanwe cellulose polymer eke sitere na mmeghachi omume etherification. Usoro a na-ewebata otu ether na hydroxyl otu nke cellulose polymer chain, na-eduga n'ịmepụta cellulose ethers nwere ihe pụrụ iche. Ethers cellulose kachasị na-agụnye Hydroxypropyl Methylcellulose (HPMC), Carboxymethyl Cellulose (CMC), Hydroxyethyl Cellulose (HEC), Methyl Cellulose (MC), na Ethyl Cellulose (EC). Nke a bụ nkọwa zuru ezu nke usoro nkwadebe:

1. Cellulose Isi mmalite:

• Usoro a na-amalite site na mkpụrụ osisi cellulose, nke a na-esi na osisi pulp ma ọ bụ owu na-enweta. Nhọrọ nke isi iyi cellulose nwere ike imetụta njirimara nke ngwaahịa ether cellulose ikpeazụ.

2. Ntupu:

• A na-edobe cellulose ahụ n'usoro ịhịa aka n'ahụ iji gbajie eriri ndị ahụ ka ọ bụrụ ụdị a na-ejikwa ya karịa. Nke a nwere ike ịgụnye ụzọ nhịahụ ma ọ bụ kemịkalụ pulping.

3. Ọcha:

• A na-eme ka cellulose dị ọcha iji wepụ adịghị ọcha, lignin, na ihe ndị ọzọ na-abụghị cellulosic. Nzọụkwụ a dị ọcha dị mkpa iji nweta ihe cellulose dị elu.

4. Mmeghachi omume Etherification:

• Cellulose dị ọcha na-enweta etherification, ebe ether dị iche iche na-ewebata ìgwè hydroxyl na cellulose polymer chain. Nhọrọ nke onye na-emepụta ihe na ọnọdụ mmeghachi omume na-adabere na ngwaahịa ether cellulose chọrọ.
• Ihe etherifying ndị a na-ahụkarị gụnyere ethylene oxide, propylene oxide, sodium chloroacetate, methyl chloride, na ndị ọzọ.

5. Njikwa nke Mmeghachi omume:

• A na-ejikwa nlezianya na-achịkwa mmeghachi omume etherification na ọnọdụ okpomọkụ, nrụgide, na pH iji nweta ogo achọrọ nke nnọchi (DS) ma zere mmeghachi omume n'akụkụ.
• A na-ejikarị ọnọdụ alkaline arụ ọrụ, a na-enyochakwa pH nke ngwakọta mmeghachi omume nke ọma.

6. Nnọpụiche na ịsa:

• Mgbe mmeghachi omume etherification ahụ gasịrị, a na-ewepụkarị ngwaahịa ahụ iji wepu oke reagents ma ọ bụ ngwaahịa. A na-esote usoro a site na ịsacha nke ọma iji kpochapụ kemịkalụ na ihe ndị na-adịghị ọcha.

7. ihicha:

• A na-akpọnwụ cellulose dị ọcha na etherified iji nweta ngwaahịa ether cellulose ikpeazụ na ntụ ntụ ma ọ bụ ụdị granular.

8. Njikwa ogo:

• A na-eji usoro nyocha dị iche iche maka njikwa mma, gụnyere spectroscopy resonance nuclear (NMR), Fourier-transform infrared (FTIR) spectroscopy, na chromatography.
• Ogo nke nnọchi (DS) bụ oke dị oke mkpa a na-enyocha n'oge mmepụta iji hụ na agbanwe agbanwe.

9. Nhazi na nkwakọ ngwaahịa:

• A na-emepụtazi cellulose ether ka ọ bụrụ akara ule dị iche iche iji mezuo ihe achọrọ nke ngwa dị iche iche. A na-achịkọta ngwaahịa ikpeazụ maka nkesa.

Nkwadebe nke cellulose ethers bụ usoro kemịkalụ dị mgbagwoju anya nke chọrọ nlezianya na-achịkwa ọnọdụ mmeghachi omume iji nweta ihe ndị a chọrọ. Ntughari nke cellulose ethers na-enye ohere iji ha mee ihe n'ọtụtụ ngwa dị iche iche n'ofe ụlọ ọrụ, gụnyere ọgwụ, nri, ihe owuwu, mkpuchi, na ihe ndị ọzọ.