Qhov Tseem Ceeb Qhov txawv - Lyophilic vs Lyophobic Colloids
Muaj ob hom colloids hu ua lyophilic thiab lyophobic raws li qhov xwm txheej ntawm kev sib cuam tshuam ntawm cov theem tawg thiab qhov nruab nrab dispersion. Qhov sib txawv tseem ceeb ntawm lyophobic thiab lyophobic colloids yog tias lyophilic colloids tsim muaj kev sib cuam tshuam ntawm cov theem dispersed thiab dispersion nruab nrab, whereas lyophobic colloids tsim me me los yog tsis muaj kev cuam tshuam ntawm dispersed theem thiab dispersion nruab nrab.
Dab tsi yog Colloids
Colloids yog cov khoom zoo ntawm txhua yam hauv txoj kab uas hla ntawm 1-1000 nm. Lub kaw lus colloidal muaj ob theem: (a) ntu ntu ntu, nruab nrab uas cov khoom zoo raug faib tawm, thiab (b) tsis tu ncua lossis tawg, theem zoo nyob rau hauv cov kab colloidal. Cov theem dispersed tej zaum yuav tsis tas yuav yog ib qho khoom, tab sis kuj yuav yog kua lossis roj. Ib yam li ntawd, cov theem tas mus li yuav yog roj, kua lossis txawm tias cov khoom. Muaj ntau hom colloidal systems nyob ntawm lub xeev ntawm ob theem.
Daim duab 01: Colloids
Yog tias cov tshuab colloidal muaj cov txheej txheem dispersed thiab cov kua dispersion nruab nrab, cov tshuab no hu ua sols. Thaum cov kua nruab nrab yog dej, lub kaw lus colloid hu ua hydrosol; Thaum cov kua nruab nrab yog cawv, lub kaw lus hu ua alcosol. Ntxiv mus, thaum qhov nruab nrab dispersion yog roj, lub kaw lus hu ua aerosol.
Lyophilic Colloids yog dab tsi?
Lyophilic colloids yog cov tshuab colloidal nyob rau hauv uas cov theem dispersed yog ruaj khov rau dispersion nruab nrab los ntawm adsorption. Yog tias ob theem sib cais los ntawm kev siv cov txheej txheem sib cais xws li coagulation, cov sol tuaj yeem rov tsim dua los ntawm kev sib xyaw cov theem. Yog li ntawd, lyophilic colloids hu ua reversible colloids. Cov tshuab no yog hnyav hnyav. Lyophilic colloids muaj qis qhov nro thiab viscosity tshaj qhov nruab nrab dispersion. Cov khoom tsis yooj yim pom nyob rau hauv ultramicroscopic. Cov khoom no feem ntau hydrated vim muaj cov pawg polar hauv cov lyophilic colloids. Piv txwv rau lyophilic colloids muaj xws li cov hmoov txhuv nplej siab, cov protein, cov pos hniav, metasilicic acids, thiab xab npum.
Lyophobic Colloids yog dab tsi?
Lyophobic colloids tsis tsim kev sib cuam tshuam ntawm cov theem tawg thiab qhov nruab nrab dispersion. Cov nqi hluav taws xob ntawm cov khoom ntawm cov khoom tawg ntawm cov theem dispersed thiab qhov nruab nrab dispersion tsim kom muaj zog repulsion, uas pab kom nyob deb ntawm ib leeg nyob rau hauv lub colloidal system. Cov colloids no tsis nyiam cov kuab tshuaj. Lyophobic colloids tsis ruaj khov; Yog li ntawd, tus neeg sawv cev stabilizing feem ntau yog siv los ua kom qhov system ruaj khov. Nyob rau hauv sols ntawm lyophobic colloids, cov khoom dispersed theem yuav raug sib cais (coagulated) los ntawm kev ntxiv ib qho electrolyte los yog cua sov. Thaum cov khoom sib cais, lawv tsis tuaj yeem muab rov qab rau hauv cov sols los ntawm kev yooj yim remixing. Yog li ntawd, cov colloids yog irreversible.
Qhov txawv ntawm Lyophilic thiab Lyophobic Colloids yog dab tsi?
Lyophilic vs Lyophobic Colloids |
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| Lyophilic colloids tsim muaj kev sib cuam tshuam ntawm cov theem tawg thiab qhov nruab nrab dispersion. | Lyophobic colloids tsim me me los yog tsis muaj kev cuam tshuam ntawm cov theem dispersed thiab dispersion nruab nrab. |
| Kub Solubility | |
| Lyophilic colloids yog hnyav hnyav | Lyophobic colloids yog hnyav ntxub |
| Kev sib xyaw ua ke ntawm Ntxiv Electrolytes | |
| Ib ob peb electrolytes tsis ua rau coagulation. | Txawm tias me me ua rau coagulation. |
| Kev kuaj pom cov khoom hauv Ultra-Microscope | |
| Particles tsis yooj yim kuaj pom | Particles tau yooj yim kuaj tau |
| Particle Migration nyob rau hauv ib qho hluav taws xob teb | |
| Cov khoom tuaj yeem lossis tsis tuaj yeem tsiv teb tsaws, tab sis kev tsiv teb tsaws tuaj yeem tshwm sim nyob rau hauv ib qho kev taw qhia. | Cov khoom tuaj yeem txav mus rau hauv ib qho kev taw qhia xwb. |
| Examples | |
| Starch, pos hniav, proteins, xab npum, thiab metasilicate acids yog ib co piv txwv. | Hlau xws li platinum, kub thiab lwm yam, nws yog xim hlau sulfides thiab hydroxides, sulfur, thiab lwm yam yog qee qhov piv txwv. |
| Kev hloov pauv | |
| Yog tias ob theem sib cais los ntawm kev siv cov txheej txheem sib cais, cov sol tuaj yeem rov tsim dua los ntawm kev sib xyaw cov theem. Yog li, lawv hu ua thim rov qab. | Thaum cov khoom sib cais, lawv tsis tuaj yeem muab rov qab rau hauv cov sols los ntawm kev yooj yim remixing. Yog li, lawv hu ua irreversible. |
Summary – Lyophilic vs Lyophobic Colloids
Raws li qhov xwm txheej ntawm kev sib cuam tshuam ntawm cov theem dispersed thiab dispersion nruab nrab, cov colloids tau muab faib ua ob hom: lyophilic thiab lyophobic colloids. Lyophilic colloids tsim muaj kev sib cuam tshuam ntawm cov theem tawg thiab tawg, thaum lyophobic colloids tsis tsim cov ntawv cog lus muaj zog. Qhov no yog qhov sib txawv tseem ceeb ntawm lyophobic thiab lyophobic colloids. Cov hmoov txhuv nplej siab, cov pos hniav, cov proteins, xab npum, thiab cov tshuaj metasilicic acids yog qee qhov piv txwv rau lyophilic colloids, uas yog thim rov qab thiab hnyav kev hlub. Cov hlau xws li platinum, kub, thiab lwm yam., hlau sulphides thiab hydroxides, thiab sulfur yog ib co piv txwv rau lyophobic colloids, uas yog irreversible thiab hnyav ntxub.
Download PDF Version of Lyophilic vs Lyophobic Colloids
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Lyophilic thiab Lyophobic Colloids.
