Echiche ndị bụ isi na nhazi nke cellulose ether

Cellulose ether bụ klaasị nke polymers sitere na cellulose, polysaccharide na-emekarị nke a na-ahụ na mgbidi cell osisi. A na-eji ethers cellulose eme ihe n'ọtụtụ ebe n'ime ụlọ ọrụ dị iche iche n'ihi ihe ndị pụrụ iche ha nwere, nke gụnyere ịgba, njide mmiri, ịmepụta ihe nkiri, na ike ịkwado. Nke a bụ echiche bụ isi na nhazi ọkwa nke cellulose ether:

Echiche ndị bụ isi:

1. Ọdịdị Cellulose:
   • Ihe mejupụtara cellulose bụ nkeji glucose ugboro ugboro jikọtara ọnụ site na β(1→4) glycosidic bonds. Ọ na-etolite ogologo ahịrị ahịrị, nke na-enye nkwado nhazi maka mkpụrụ ndụ ihe ọkụkụ.
2. Etherification:
   • A na-emepụta ethers cellulose site na mgbanwe kemịkalụ nke cellulose site n'iwebata otu ether (-OCH3, -OCH2CH2OH, -OCH2COOH, wdg) na ìgwè hydroxyl (-OH) nke cellulose molecule.
3. Ọrụ:
   • Iwebata nke otu ether na-agbanwe kemịkalụ na nke anụ ahụ nke cellulose, na-enye cellulose ethers ọrụ pụrụ iche dị ka solubility, viscosity, njide mmiri, na nhazi ihe nkiri.
4. Ọdịdị biodegradable:
   • Cellulose ethers bụ ihe ndị na-emepụta ihe na-emepụta ihe, nke pụtara na microorganisms na gburugburu ebe obibi nwere ike imebi ha, na-eduga n'ichepụta ngwaahịa ndị na-adịghị emerụ ahụ.

Nhazi:

A na-ekewa ethers cellulose dabere na ụdị ether dị iche iche ewebatara na molekul cellulose na ogo nke nnọchi ha. Ụdị cellulose ethers ndị a na-ahụkarị gụnyere:

1. Methyl cellulose (MC):
   • A na-emepụta methyl cellulose site n'iwebata otu methyl (-OCH3) na molekul cellulose.
   • Ọ bụ soluble na mmiri oyi na-etolite uzo, viscous ngwọta. A na-eji MC eme ihe dị ka thickener, stabilizer, na ihe nkiri bụbu na ngwa dị iche iche.
2. Hydroxyethyl cellulose (HEC):
   • A na-enweta Hydroxyethyl cellulose site na iwebata otu hydroxyethyl (-OCH2CH2OH) na molekul cellulose.
   • Ọ na-egosipụta njide mmiri dị mma na ihe na-eme ka ọ dị arọ, na-eme ka ọ dị mma maka iji agba, nrapado, ihe ịchọ mma, na ọgwụ.
3. Hydroxypropyl Methyl Cellulose (HPMC):
   • Hydroxypropyl methyl cellulose bụ copolymer nke methyl cellulose na hydroxypropyl cellulose.
   • Ọ na-enye nguzozi nke ihe ndị dị ka mmiri solubility, njikwa viscosity, na nhazi ihe nkiri. A na-eji HPMC eme ihe n'ọtụtụ ebe n'ihe owuwu, ọgwụ na ngwaahịa nlekọta onwe onye.
4. Carboxymethyl cellulose (CMC):
   • A na-emepụta Carboxymethyl cellulose site na iwebata otu carboxymethyl (-OCH2COOH) na molekul cellulose.
   • Ọ bụ soluble na mmiri na-etolite viscous ngwọta na magburu onwe ndim na stabilizing Njirimara. A na-eji CMC na nri, ọgwụ na ngwa ụlọ ọrụ mmepụta ihe.
5. Ethyl Hydroxyethyl Cellulose (EHEC):
   • Ethyl hydroxyethyl cellulose na-enweta site na iwebata ethyl na hydroxyethyl otu n'ime molekul cellulose.
   • Ọ na-egosiputa njigide mmiri na-emewanyewanye, njupụta, na ihe rheological ma e jiri ya tụnyere HEC. A na-eji EHEC eme ihe na ihe owuwu na ngwaahịa nlekọta onwe onye.

Cellulose ethers bụ polymers dị mkpa nwere ngwa dị iche iche n'ofe ụlọ ọrụ dị iche iche. Mgbanwe kemịkalụ ha site na etherification na-eme ka ọrụ dị iche iche na-arụ ọrụ, na-eme ka ha bụrụ ihe mgbakwunye bara uru na nhazi maka agba, nrapado, ihe ịchọ mma, ọgwụ, ngwaahịa nri, na ihe owuwu. Ịghọta echiche ndị bụ isi na nhazi nke cellulose ethers dị oké mkpa maka ịhọrọ ụdị polymer kwesịrị ekwesị maka ngwa ngwa.