Qhov sib txawv tseem ceeb ntawm colloid thiab emulsion yog tias colloid tuaj yeem tsim tau thaum twg lub xeev ntawm cov teeb meem (khoom, kua lossis roj) ua ke nrog cov kua hos emulsion muaj ob yam kua uas tsis sib haum nrog ib leeg.
A colloid yog sib xyaw ntawm cov khoom sib xyaw (uas yog hauv cov khoom, kua lossis roj) thiab kua. Ib qho emulsion yog ib hom ntawm colloid. Ib qho colloid feem ntau muaj ob yam khoom; ib ntus tsis tu ncua thiab ib ntus tsis tu ncua. The discontinuous Phase faib thoob plaws hauv ntu ntu.
Colloid yog dab tsi?
A colloid yog homogeneous non-crystalline cov khoom muaj xws li cov molecules loj los yog ultramicroscopic particles ntawm ib yam khoom dispersed los ntawm ob yam khoom. Cov khoom tawg yooj yim tsis nyob ntawm tus kheej vim tias cov colloids ruaj khov heev.
Muaj ntau pawg sib txawv ntawm cov colloids uas yog pawg raws li qhov sib txawv. Plaub yam loj yog raws li nram no:
- Sol - ib qho kev ncua colloidal uas muaj cov khoom sib faib hauv cov kua
- Emulsion - ib qho kev ncua colloidal uas muaj kev sib xyaw ntawm ob cov kua
- Ua Npuas Ncauj - cov ntaub ntawv no thaum cov pa roj nkag mus rau hauv cov kua lossis cov khoom
- Aerosol - cov ntaub ntawv thaum cov khoom siv lossis cov khoom ua kua faib thoob plaws hauv huab cua
Ntxiv rau, muaj peb hom colloids; Multimolecular colloids, macromolecular colloids, thiab micelles. Qhov kev faib tawm no faib cov colloids raws li qhov loj me thiab tus cwj pwm ntawm cov khoom hauv ib qho colloid. Ib daim ntawv multimolecular colloid yog cov molecules ntawm ib tug compound aggregate thaum peb dissolve lub compound nyob rau hauv ib tug haum hnyav. Nyob rau hauv macromolecular colloid, tus neeg hais lus loj txaus los hu qhov no yog colloid. Nyob rau hauv micelles, nws muaj ib tug aggregate ntawm molecules nyob rau hauv ib tug colloidal tov, xws li cov tsim los ntawm detergents (nyob rau hauv ib ncig).
YEmulsion yog dab tsi?
Ib qho emulsion yog ib qho zoo dispersion ntawm feeb ntawm ib cov kua hauv lwm qhov uas nws tsis soluble lossis miscible. Yog li ntawd, nws yog ib tug sib tov ntawm ob kua uas yog immiscible nrog ib leeg. Lawv yog hom colloids. Txawm hais tias ob lo lus no tau siv sib hloov, lo lus emulsion tshwj xeeb piav qhia txog kev sib xyaw ntawm ob cov kua uas tsim cov colloid.
Daim duab 01: Tsim cov emulsion
Ib qho emulsion muaj ob theem; ib ntus tsis tu ncua thiab ib ntus tsis tu ncua. Lub discontinuous theem faib thoob plaws hauv lub nruam theem. Yog tias cov theem txuas ntxiv yog dej, ces cov colloid yog hydrocolloid. Lub ciam teb ntawm ob lub kua hauv ib qho emulsion yog "interface".
Ib qho emulsion muaj qhov pom huab. Qhov ntawd yog vim nws muaj theem cuam tshuam uas tuaj yeem tawg lub teeb ci uas dhau los ntawm emulsion. Thaum tag nrho cov teeb hluav taws xob tau tawg ua ke sib npaug, ib qho emulsion zoo li cov kua dawb.
Qhov txawv ntawm Colloid thiab Emulsion yog dab tsi?
Colloid vs Emulsion |
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| A colloid yog homogeneous non-crystalline cov khoom muaj xws li cov molecules loj los yog ultramicroscopic particles ntawm ib yam khoom dispersed los ntawm ob yam khoom. | Ib qho emulsion yog ib qho zoo dispersion ntawm feeb ntawm ib cov kua hauv lwm qhov uas nws tsis soluble lossis miscible. |
| Ib lub colloid tuaj yeem tsim tau thaum twg lub xeev ntawm cov teeb meem (khoom, kua lossis roj) ua ke nrog cov kua. | Ib qho emulsion muaj ob yam ua kua uas tsis sib haum nrog ib leeg. |
Summary – Colloid vs Emulsion
Ib qho emulsion yog ib daim ntawv ntawm colloid. Lwm hom colloids muaj xws li sol, ua npuas ncauj thiab aerosols. Qhov sib txawv ntawm colloid thiab emulsion yog tias lub colloid tuaj yeem tsim tau thaum twg lub xeev ntawm cov teeb meem (khoom, kua lossis roj) ua ke nrog cov kua thaum lub emulsion muaj ob yam kua uas tsis sib haum nrog ib leeg.
