Taw qhia
Thickening agents yog siv nyob rau hauv ntau yam kev lag luam, nrog rau cov khoom noj, tshuaj pleev ib ce, thiab tshuaj, los txhim kho cov viscosity los yog kev ntxhib los mos ntawm cov kua. Thaum muaj ntau yam sib txawv ntawm cov thickening agents, qee qhov muaj zog dua lwm tus. Nyob rau hauv tsab xov xwm no, peb yuav tshawb xyuas cov muaj zog thickening agents thiab lawv siv li cas.
Common Thickening Agents
Ua ntej sib tham txog cov muaj zog thickening agents, nws yog ib qho tseem ceeb kom nkag siab txog qee qhov ntau dua. Cov no suav nrog:
1. Cov hmoov nplej - Qhov no yog ib qho tuab siv hauv kev ua noj, tshwj xeeb tshaj yog rau cov kua ntses thiab gravy. Nws ua haujlwm los ntawm kev tsim cov roux nrog rog thiab tom qab ntawd ntxiv kua.
2. Cornstarch – Pob kws yog lwm cov thickener siv ua noj. Nws ua haujlwm los ntawm kev nqus cov kua thiab tsim cov khoom zoo li gel.
3. Gelatin - Gelatin yog cov protein-based thickening tus neeg sawv cev uas feem ntau siv hauv cov khoom qab zib xws li gelatin pwm thiab paj npleg.
4. Pectin – Pectin yog ib tug carbohydrate-raws li thickening tus neeg sawv cev uas feem ntau siv nyob rau hauv jams thiab jellies.
Thaum cov no yog tag nrho cov neeg ua haujlwm thickening, lawv yuav tsis yog cov kev xaiv muaj zog tshaj plaws.
Cov pos hniav
Ib pawg ntawm cov muaj zog thickening agents yog cov pos hniav. Cov no feem ntau yog muab los ntawm cov nroj tsuag thiab siv ntau yam kev lag luam, suav nrog zaub mov, tshuaj pleev ib ce, thiab tshuaj. Nov yog qee yam ntawm cov pos hniav uas siv los ua cov tshuaj thickening:
1. Xanthan gum – Xanthan gum yog polysaccharide uas yog tsim los ntawm fermentation ntawm cov kab mob hu ua Xanthomonas campestris. Nws yog feem ntau siv hauv kev lag luam khoom noj los txhim kho kev ntxhib los mos thiab ruaj khov ntawm cov khoom xws li cov khaub ncaws hnav khaub ncaws, kua ntses, thiab cov khoom ci.
2. Guar gum – Guar gum yog galactomannan uas muab rho tawm los ntawm cov noob ntawm guar cog. Nws yog feem ntau siv hauv kev lag luam khoom noj khoom haus ua cov thickener thiab stabilizer hauv cov khoom xws li ice cream, soups, thiab sauces.
3. Carrageenan - Carrageenan yog polysaccharide uas tau muab los ntawm cov seaweed liab. Nws yog feem ntau siv nyob rau hauv kev lag luam khoom noj khoom haus raws li ib tug thickener thiab stabilizer nyob rau hauv cov khoom xws li cov khoom siv mis nyuj, nqaij cov khoom, thiab dej haus.
Cov pos hniav feem ntau siv ua ke nrog lwm cov thickeners kom ua tau raws li qhov xav tau kev ntxhib los mos lossis viscosity. Piv txwv li, xanthan cov pos hniav tuaj yeem siv ua ke nrog cov pos hniav los tsim cov khoom tuab, ruaj khov dua.
Cellulose Derivatives
Lwm pawg ntawm cov muaj zog thickening agents yog cellulose derivatives. Cov no feem ntau yog muab los ntawm cov ntoo pulp lossis paj rwb thiab siv ntau yam kev lag luam. Nov yog qee qhov feem ntau cov cellulose derivatives siv los ua thickening agents:
1. Hydroxypropyl methylcellulose (HPMC) - HPMC yog ib qho cellulose derivative uas feem ntau siv rau hauv kev lag luam tshuaj thiab kev tsim kho ua cov thickener thiab binder.
2. Carboxymethyl cellulose (CMC) - CMC yog ib qho cellulose derivative uas feem ntau siv hauv kev lag luam khoom noj khoom haus ua cov thickener thiab stabilizer hauv cov khoom xws li cov khoom ci, hnav khaub ncaws, thiab cov kua ntses.
3. Ethyl cellulose - Ethyl cellulose yog cellulose derivative uas feem ntau siv nyob rau hauv kev lag luam kws tshuaj raws li ib tug thickener thiab binder nyob rau hauv cov ntsiav tshuaj formulations.
Cellulose derivatives feem ntau yog siv tau yooj yim thiab sib xws nrog ntau yam ntawm lwm cov khoom xyaw. Lawv kuj feem ntau siv ua ke nrog lwm cov thickeners kom ua tiav qhov xav tau kev ntxhib los mos lossis viscosity.
Silica Derivatives
Silica derivatives yog lwm pawg ntawm cov muaj zog thickening agents. Lawv feem ntau muab tau los ntawm ntuj los yog hluavtaws thiab siv ntau yam kev lag luam. Nov yog qee qhov feem ntau siv silica derivatives siv los ua cov tshuaj thickening:
1. Colloidal silica - Colloidal silica yog silica derivative uas feem ntau siv hauv kev lag luam tshuaj pleev ib ce ua cov thickener thiab stabilizer nyob rau hauv cov khoom xws li tshuaj pleev ib ce thiab cream.
2. Fumed silica - Fumed silica yog ib qho silica derivative uas feem ntau siv rau hauv kev tsim kho thiab kev lag luam tsheb ua cov thickener thiab reinforcing agent.
3. Precipitated silica - Precipitated silica yog ib qho silica derivative uas feem ntau siv hauv cov khoom noj thiab tshuaj lag luam ua cov thickener thiab anti-caking agent.
Silica derivatives feem ntau siv tau yooj yim thiab sib xws nrog ntau yam ntawm lwm cov khoom xyaw. Lawv kuj feem ntau siv ua ke nrog lwm cov thickeners kom ua tiav qhov xav tau kev ntxhib los mos lossis viscosity.
Xaus
Thaum muaj ntau yam sib txawv ntawm cov thickening agents muaj, qee qhov muaj zog dua lwm tus. Cov pos hniav, cellulose derivatives, thiab silica derivatives yog tag nrho cov kev xaiv muaj zog uas feem ntau siv nyob rau hauv ntau yam kev lag luam. Thaum xaiv tus neeg sawv cev thickening, nws yog ib qho tseem ceeb uas yuav tau xav txog cov ntawv thov tshwj xeeb thiab qhov xav tau kev ntxhib los mos lossis viscosity. Los ntawm kev xaiv tus neeg sawv cev thickening, koj tuaj yeem txhim kho qhov zoo thiab ruaj khov ntawm koj cov khoom.