Carboxymethylcellulose (CMC) thiab xanthan gum yog cov hydrophilic colloids uas feem ntau siv hauv kev lag luam zaub mov ua cov thickeners, stabilizers, thiab gelling agents. Txawm hais tias lawv muaj qee qhov zoo sib xws, ob yam tshuaj no txawv heev hauv keeb kwm, qauv, thiab kev siv.
Carboxymethylcellulose (CMC):
1. Qhov chaw thiab cov qauv:
Qhov Chaw: CMC yog muab los ntawm cellulose, ib qho polymer ntuj uas pom muaj nyob rau hauv cov phab ntsa cell ntawm cov nroj tsuag. Nws feem ntau yog rho tawm los ntawm cov ntoo pulp lossis paj rwb fibers.
Qauv: CMC yog ib qho cellulose derivative tsim los ntawm carboxymethylation ntawm cellulose molecules. Carboxymethylation cuam tshuam nrog kev qhia txog carboxymethyl pawg (-CH2-COOH) rau hauv cov qauv cellulose.
2. Kev yaj tau:
CMC yaj tau hauv dej, ua rau cov kua ntshiab thiab khov. Qhov degree of substitution (DS) hauv CMC cuam tshuam rau nws cov solubility thiab lwm yam khoom.
3. Kev Ua Haujlwm:
Ua kom tuab: CMC yog siv dav ua tus neeg sawv cev tuab hauv ntau yam khoom noj, suav nrog cov kua ntses, cov khaub ncaws hnav thiab cov khoom noj mis nyuj.
Kev Ruaj Ntseg: Nws pab tswj cov emulsions thiab cov suspensions, tiv thaiv kev sib cais ntawm cov khoom xyaw.
Kev Khaws Dej: CMC paub txog nws lub peev xwm los khaws dej, pab khaws cov dej noo hauv cov khoom noj.
4. Daim Ntawv Thov:
CMC feem ntau siv rau hauv kev lag luam zaub mov, tshuaj thiab tshuaj pleev ib ce. Hauv kev lag luam zaub mov, nws yog siv rau hauv cov khoom xws li ice cream, dej haus thiab khoom qab zib.
5. Kev Txwv:
Txawm hais tias CMC siv dav dav los, nws qhov ua tau zoo tuaj yeem raug cuam tshuam los ntawm cov yam xws li pH thiab qhov muaj qee cov ions. Nws yuav qhia txog kev ua haujlwm poob qis hauv qab cov xwm txheej acidic.
Xanthan ntawm cov pos hniav:
1. Qhov chaw thiab cov qauv:
Qhov Chaw: Xanthan gum yog ib qho microbial polysaccharide tsim los ntawm kev fermentation ntawm carbohydrates los ntawm cov kab mob Xanthomonas campestris.
Cov Qauv: Cov qauv yooj yim ntawm xanthan gum muaj cov cellulose backbone nrog trisaccharide side chains. Nws muaj cov glucose, mannose thiab glucuronic acid units.
2. Kev yaj tau:
Xanthan gum yog cov khoom uas yaj tau zoo heev hauv dej, ua rau cov kua nplaum khov ntawm cov concentration qis.
3. Kev Ua Haujlwm:
Ua kom tuab: Ib yam li CMC, xanthan gum yog ib yam khoom ua kom tuab zoo. Nws ua rau cov khoom noj du thiab ywj.
Kev Ruaj Ntseg: Xanthan gum stabilizes cov kev ncua thiab cov emulsions, tiv thaiv kev sib cais theem.
Gelling: Hauv qee daim ntawv thov, xanthan gum pab tsim gel.
4. Daim Ntawv Thov:
Xanthan gum muaj ntau yam kev siv hauv kev lag luam zaub mov, tshwj xeeb tshaj yog hauv kev ci khoom noj uas tsis muaj gluten, cov kua zaub xam lav thiab cov kua ntses. Nws kuj tseem siv rau hauv ntau yam kev siv hauv kev lag luam.
5. Kev Txwv:
Hauv qee qhov kev siv, kev siv xanthan gum ntau dhau tuaj yeem ua rau cov qauv nplaum lossis "nqaij". Kev tswj hwm cov tshuaj yuav tsum tau ua tib zoo kom tsis txhob muaj cov khoom tsis zoo.
Piv txwv:
1. Qhov chaw:
CMC yog muab los ntawm cellulose, ib qho polymer uas ua los ntawm cov nroj tsuag.
Xanthan gum yog tsim los ntawm kev fermentation ntawm microbial.
2. Cov qauv tshuaj lom neeg:
CMC yog ib qho cellulose derivative uas tsim los ntawm carboxymethylation.
Xanthan gum muaj cov qauv nyuaj dua nrog cov saw trisaccharide.
3. Kev yaj tau:
Ob qho tib si CMC thiab xanthan gum yog cov dej-soluble.
4. Kev Ua Haujlwm:
Ob leeg ua raws li cov thickeners thiab stabilizers, tab sis tej zaum yuav muaj me ntsis txawv ntawm kev ntxhib los mos.
5. Daim Ntawv Thov:
CMC thiab xanthan gum siv rau ntau yam khoom noj thiab kev siv hauv kev lag luam, tab sis qhov kev xaiv ntawm lawv yuav nyob ntawm qhov xav tau tshwj xeeb ntawm cov khoom.
6. Kev Txwv:
Txhua tus muaj nws cov kev txwv, thiab qhov kev xaiv ntawm lawv yuav nyob ntawm cov yam xws li pH, koob tshuaj, thiab cov qauv xav tau ntawm cov khoom kawg.
Txawm hais tias CMC thiab xanthan gum muaj kev siv zoo ib yam li hydrocolloids hauv kev lag luam zaub mov, lawv txawv ntawm keeb kwm, qauv, thiab daim ntawv thov. Kev xaiv ntawm CMC thiab xanthan gum nyob ntawm qhov xav tau tshwj xeeb ntawm cov khoom, xav txog cov yam ntxwv xws li pH, koob tshuaj thiab cov khoom siv xav tau. Ob yam tshuaj no pab txhawb rau qhov zoo nkauj, kev ruaj khov thiab qhov zoo ntawm ntau yam khoom noj thiab cov khoom lag luam.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-26-2023