Cellulose ethers bụ klaasị dị iche iche nke ogige sitere na cellulose, polymer eke dị na mgbidi cell osisi.A na-eji ha eme ihe n'ọtụtụ ụlọ ọrụ dị iche iche n'ihi ihe onwunwe ha pụrụ iche, gụnyere solubility n'ọtụtụ ihe mgbaze.Ịghọta omume solubility nke cellulose ethers dị oké mkpa maka ngwa ha na ọgwụ, nri, ihe owuwu, na akụkụ ndị ọzọ.
A na-emepụtakarị ethers cellulose site n'ịgbanwe cellulose nke kemịkal site na mmeghachi omume etherification.Ụdị cellulose ethers ndị a na-ahụkarị gụnyere methyl cellulose (MC), ethyl cellulose (EC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), na carboxymethyl cellulose (CMC).Ụdị nke ọ bụla na-egosipụta njirimara solubility dị iche iche dabere na nhazi kemịkal ya na ogo nke nnọchi ya.
A na-emetụta solubility nke cellulose ethers site na ihe ndị dị ka ogo nke polymerization, ogo nke nnọchi, ịdị arọ molecular, na ọdịdị nke otu ndị nọchiri anya ya.N'ozuzu, cellulose ethers nwere ogo dị ala nke ngbanwe na oke molekụla dị elu na-esichaghị ike ma e jiri ya tụnyere ndị nwere ogo dị elu nke ngbanwe na ihe dị ala.
Otu n'ime ihe kachasị mkpa nke cellulose ethers bụ ikike ha nwere ịgbaze n'ụdị ihe mgbaze dị iche iche, gụnyere mmiri, ihe mgbaze organic, na ụfọdụ mmiri mmiri polar na ndị na-abụghị polar.Mmiri solubility bụ akụkụ dị mkpa nke ọtụtụ cellulose ethers ma dị mkpa karịsịa maka ngwa na ọgwụ, nri, na ngwaahịa nlekọta onwe onye.
Ethers cellulose na-agbaze mmiri dị ka HEC, HPC, na CMC na-emepụta ihe ngwọta doro anya, viscous mgbe a gbasasịrị na mmiri.Ngwọta ndị a na-egosipụta omume pseudoplastic, nke pụtara na viscosity ha na-ebelata n'okpuru nrụgide shiee, na-eme ka ha dị mma maka ojiji dị ka ndị na-agbapụta ihe, ndị na-eme ihe ike, na ndị na-emepụta ihe nkiri na nri na usoro ọgwụ.
Ihe solubility nke cellulose ethers na organic solvents na-adabere n'ụdị kemịkal ha na polarity nke ihe mgbaze.Dịka ọmụmaatụ, MC na EC na-agbaze n'ọtụtụ ihe mgbaze organic, gụnyere acetone, ethanol, na chloroform, n'ihi ngbanwe ha dị ntakịrị na àgwà hydrophobic.Ngwongwo ndị a na-eme ka ha baa uru na ngwa dị ka mkpuchi, nrapado, na usoro nnyefe ọgwụ na-achịkwa.
HEC na HPC, nke nwere hydroxyethyl na hydroxypropyl otu, n'otu n'otu, na-egosipụta nkwalite solubility na pola organic solvents dị ka alcohols na glycols.A na-ejikarị ethers cellulose ndị a eme ihe dị ka ndị na-emepụta ihe na rheology modifiers na ihe ịchọ mma na ngwaahịa nlekọta onwe onye, yana agba na mkpuchi mmiri.
CMC bụ soluble na mmiri na ụfọdụ pola solvents n'ihi ya carboxymethyl substituents, nke na-enye mmiri solubility na polymer yinye.A na-arụ ya n'ọtụtụ ebe dị ka onye na-emekọ ihe, stabilizer, na emulsifier na ngwaahịa nri, ọgwụ na ngwa ụlọ ọrụ mmepụta ihe.
Enwere ike imetụta solubility nke cellulose ethers site na ihe ndị dị n'èzí dị ka okpomọkụ, pH, na ọnụnọ nke nnu ma ọ bụ ihe mgbakwunye ndị ọzọ.Dịka ọmụmaatụ, mgbakwunye nke electrolytes dị ka sodium chloride ma ọ bụ calcium chloride nwere ike ibelata solubility nke cellulose ethers soluble mmiri site n'ịkwalite nchịkọta polymer ma ọ bụ mmiri ozuzo.
cellulose ethers na-egosipụta ihe dị iche iche solubility nke na-eme ka ha bụrụ ihe mgbakwunye bara uru n'ọtụtụ ụlọ ọrụ.Ikike ha igbari na mmiri, organic solvents, na polar liquids na-enyere ngwa dị iche iche sitere na usoro ọgwụ ruo na ihe owuwu.Ịghọta omume solubility nke cellulose ethers dị mkpa maka ịkwalite arụmọrụ ha na ọrụ ha na ngwaahịa na usoro dị iche iche.
Oge nzipu: Eprel-24-2024