Cellulose ethers o se vasega eseese o mea faʻapipiʻi e maua mai i le cellulose, o se polymer masani o loʻo maua i totonu o puipui o laau. E fa'aaogaina lautele i pisinisi eseese ona o latou uiga fa'apitoa, e aofia ai le solubility i le tele o solvents. O le malamalama i amioga solubility o cellulose ethers e taua tele mo a latou faʻaoga i vailaʻau, meaʻai, faufale, ma isi vaega.
Cellulose ethers e masani lava ona gaosia e ala i kemikolo suia cellulose e ala i etherification tali. O ituaiga masani o cellulose ethers e aofia ai le methyl cellulose (MC), ethyl cellulose (EC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), ma le carboxymethyl cellulose (CMC). O ituaiga ta'itasi o lo'o fa'aalia uiga solubility ma'oti e fa'atatau i lona fausaga fa'a kemikolo ma le tikeri o le suiga.
O le solubility o cellulose ethers e a'afia i mea e pei o le tikeri o le polymerization, tikeri o le sui, mamafa mole, ma le natura o vaega sui. E masani lava, cellulose ethers ma tikeri maualalo o le suitulaga ma maualuga mole mamafa mamafa e itiiti soluble pe a faatusatusa i latou e maualuga atu tikeri o le suia ma maualalo mole mamafa mamafa.
O se tasi o mea sili ona taua o le cellulose ethers o lo latou gafatia e faʻamavae i le tele o solvents, e aofia ai vai, solvents organic, ma nisi vai polar ma non-polar. Ole solubility ole vai ole vaega autu ole tele o cellulose ethers ma e taua tele mo fa'aoga ile vaila'au, mea'ai, ma mea tau tausiga a le tagata lava ia.
Ole eter ole cellulose e mafai ona solu ile vai e pei ole HEC, HPC, ma le CMC e fau ni vaifofo manino pe a taape ile vai. O nei vaifofo e fa'aalia ai amioga fa'alilolilo, o lona uiga e fa'aitiitia le viscosity i lalo o le mamafa o le sifi, ma fa'aoga talafeagai mo le fa'aoga e fai ma mea mafiafia, fa'amautu, ma mea e fai ata tifaga i mea'ai ma vaila'au.
O le solubility o cellulose ethers i solvents organic e faalagolago i lo latou fausaga kemikolo ma le polarity o le solvent. Mo se faʻataʻitaʻiga, o le MC ma le EC e mafai ona solu i le tele o vailaʻau faʻalaʻau, e aofia ai le acetone, ethanol, ma le chloroform, ona o lo latou tulaga maualalo o le suia ma le hydrophobic uiga. O nei meatotino e faʻatauaina ai i latou i faʻaoga e pei o faʻapipiʻi, faʻapipiʻi, ma faʻatonu-faʻasaʻoloto faiga tuʻuina atu vailaʻau.
HEC ma le HPC, o loʻo iai vaega hydroxyethyl ma hydroxypropyl, faʻaalia, faʻaleleia atili le solubility i polar organic solvents e pei ole alcohols ma glycols. O nei cellulose ethers e masani ona faʻaaogaina e fai ma mea mafiafia ma suiga o le rheology i mea teuteu ma mea e tausia ai le tagata lava ia, faʻapea foʻi ma vali faʻavae vai ma ufiufi.
O le CMC e solu i le vai ma nisi vaifofo polar ona o lona carboxymethyl suitulaga, lea e maua ai le vai-solubility i le filifili polymer. O lo'o fa'aaogaina lautele e fai ma sui mafiafia, fa'amautu, ma emulsifier i mea'ai, vaila'au, ma mea tau alamanuia.
O le solubility o cellulose ethers e mafai foi ona aʻafia i mea mai fafo e pei o le vevela, pH, ma le i ai o masima poʻo isi faʻaopoopoga. Mo se faʻataʻitaʻiga, o le faʻaopoopoga o mea eletise e pei o le sodium chloride poʻo le calcium chloride e mafai ona faʻaitiitia ai le solubility o vai-soluble cellulose ethers e ala i le faʻalauiloaina o le polymer aggregation poʻo le timuga.
o ethers cellulose o lo'o fa'aalia ai le tele o mea e mafai ona solubility e avea ai ma mea fa'aopoopo taua i le tele o alamanuia. O lo latou malosi e fa'amuta i le vai, vai fa'aletino, ma vai polar e mafai ai ona fa'aoga eseese e amata mai i vaila'au fa'afoma'i i mea faufale. O le malamalama i amioga solubility o cellulose ethers e taua tele mo le faʻaleleia atili o latou faʻatinoga ma galuega i oloa eseese ma faiga.
Taimi meli: Apr-24-2024