Carboxymethylcellulose (CMC) thiab xanthan gum yog ob qho tib si hydrophilic colloids feem ntau siv hauv kev lag luam khoom noj khoom haus ua thickeners, stabilizers, thiab gelling agents. Txawm hais tias lawv qhia qee qhov kev ua haujlwm zoo sib xws, ob yam khoom sib txawv heev hauv keeb kwm, qauv, thiab kev siv.
Carboxymethylcellulose (CMC):
1. Qhov chaw thiab cov qauv:
Tau qhov twg los: CMC yog muab los ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. Nws feem ntau yog muab rho tawm los ntawm ntoo pulp lossis paj rwb fibers.
Qauv: CMC yog cellulose derivative tsim los ntawm carboxymethylation ntawm cellulose molecules. Carboxymethylation suav nrog kev qhia txog cov pawg carboxymethyl (-CH2-COOH) rau hauv cov qauv cellulose.
2. Solubility:
CMC yog soluble nyob rau hauv dej, tsim ib tug ntshiab thiab viscous tov. Qhov degree ntawm kev hloov pauv (DS) hauv CMC cuam tshuam rau nws cov solubility thiab lwm yam khoom.
3. Muaj nuj nqi:
Thickening: CMC yog dav siv los ua tus neeg sawv cev thickening nyob rau hauv ntau yam khoom noj khoom haus, nrog rau cov kua ntses, hnav khaub ncaws thiab cov khoom siv mis nyuj.
Stabilization: Nws pab stabilize emulsions thiab suspensions, tiv thaiv kev sib cais ntawm cov khoom xyaw.
Kev tuav dej: CMC paub txog nws lub peev xwm khaws dej, pab khaws cov dej noo hauv cov khoom noj.
4. Daim ntawv thov:
CMC feem ntau siv hauv kev lag luam khoom noj, tshuaj thiab tshuaj pleev ib ce. Hauv kev lag luam khoom noj khoom haus, nws yog siv rau hauv cov khoom xws li ice cream, dej haus thiab khoom ci.
5. Kev txwv:
Txawm hais tias CMC tau siv dav, nws cov txiaj ntsig tuaj yeem cuam tshuam los ntawm cov khoom xws li pH thiab muaj qee yam ions. Nws tuaj yeem pom kev ua haujlwm tsis zoo nyob rau hauv acidic tej yam kev mob.
Xanthan cov pos hniav:
1. Qhov chaw thiab cov qauv:
Source: Xanthan gum yog microbial polysaccharide tsim los ntawm fermentation ntawm carbohydrates los ntawm cov kab mob Xanthomonas campestris.
Structure: Cov qauv yooj yim ntawm xanthan cov pos hniav muaj cov pob txha cellulose nrog trisaccharide sab chains. Nws muaj cov piam thaj, mannose thiab glucuronic acid units.
2. Solubility:
Xanthan cov pos hniav yog soluble hauv dej, tsim cov kua nplaum ntawm qhov tsis tshua muaj siab.
3. Muaj nuj nqi:
Thickening: Zoo li CMC, xanthan cov pos hniav yog ib qho ua kom tuab zoo. Nws muab cov khoom noj kom du thiab elastic zoo nkauj.
Kev ruaj ntseg: Xanthan cov pos hniav stabilizes suspensions thiab emulsions, tiv thaiv theem sib cais.
Gelling: Hauv qee daim ntawv thov, xanthan cov pos hniav pab hauv kev tsim cov gel.
4. Daim ntawv thov:
Xanthan cov pos hniav muaj ntau yam kev siv hauv kev lag luam khoom noj, tshwj xeeb tshaj yog nyob rau hauv gluten-dawb ci, zaub xam lav hnav khaub ncaws thiab kua ntses. Nws kuj yog siv nyob rau hauv ntau yam kev siv tshuab.
5. Kev txwv:
Hauv qee daim ntawv thov, kev siv xanthan ntau dhau ntawm cov pos hniav tuaj yeem ua rau cov nplaum nplaum lossis "dhau" kev ntxhib los mos. Ua tib zoo tswj kev noj ntau npaum li cas yuav tsum tau zam kom tsis txhob muaj cov khoom siv tsis zoo.
Sib piv:
1. Qhov chaw:
CMC yog muab los ntawm cellulose, ib tsob nroj-raws li polymer.
Xanthan gum yog tsim los ntawm microbial fermentation.
2. Cov qauv tshuaj:
CMC yog cellulose derivative tsim los ntawm carboxymethylation.
Xanthan cov pos hniav muaj cov qauv ntau dua nrog trisaccharide sab chains.
3. Solubility:
CMC thiab xanthan gum yog dej-soluble.
4. Muaj nuj nqi:
Ob leeg ua raws li cov thickeners thiab stabilizers, tab sis tej zaum yuav muaj kev sib txawv me ntsis ntawm kev ntxhib los mos.
5. Daim ntawv thov:
CMC thiab xanthan cov pos hniav siv ntau yam khoom noj thiab kev siv hauv kev lag luam, tab sis kev xaiv ntawm lawv yuav nyob ntawm seb cov khoom siv tshwj xeeb.
6. Kev txwv:
Txhua tus muaj nws cov kev txwv, thiab kev xaiv ntawm lawv yuav nyob ntawm seb yam xws li pH, ntau npaum li cas, thiab qhov xav tau kev ntxhib los mos ntawm cov khoom kawg.
Txawm hais tias CMC thiab xanthan cov pos hniav muaj kev siv zoo xws li hydrocolloids hauv kev lag luam khoom noj, lawv txawv hauv keeb kwm, qauv, thiab daim ntawv thov. Kev xaiv ntawm CMC thiab xanthan cov pos hniav nyob ntawm qhov kev xav tau tshwj xeeb ntawm cov khoom, suav nrog cov ntsiab lus xws li pH, ntau npaum li cas thiab cov khoom siv uas xav tau. Ob yam khoom muaj txiaj ntsig zoo rau kev ntxhib los mos, ruaj khov thiab zoo tag nrho ntawm ntau yam khoom noj thiab cov khoom lag luam.
Post lub sij hawm: Dec-26-2023