Applications of colloids
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Applications of colloids

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Applications of colloids Presentation Transcript

  • 1. Training Learning to Work Efficiently and Accurately
  • 2. APPLICATIONS OF COLLOIDS BAZLA SIDDIQUI
  • 3. OVERVIEW What are colloids?  Applications of colloids  Pharmaceutical apllications.  Industrial applications  Other applications  Conclusion. 
  • 4. INTRODUCTION
  • 5. DEFINITION Colloidal System is  the heterogenous biphasic system  dispersed phase ranges within 1-10 angstrom to few micrometres in dimensions.  differs from other heterogenous and homogenous solutions in terms of the size of dispersed phase.
  • 6. APPLICATIONS OF COLLOIDS Colloids play an important role in pharmacy,in our daily life and in industries.  A few of the important applications of colloids are listed below. 
  • 7. PHARMACEUTICAL APPLICATIONS
  • 8. PHARMACEUTICAL APPLICATIONS THERAPY  Colloidal system are used as therapeutic agents in different areas.  Colloidal medicines being finely divided, are more effective and are easily absorbed in our system.  Penicillin and streptomycin . EYE LOTIONS:  Argyrol and protargyrol
  • 9. PHARMACEUTICAL APPLICATIONS COLLOIDAL SULPHUR: Absorbed efficiently in colloidal forms. COLLOIDAL COPPER: In treatment of cancer. COLLOIDAL GOLD: Diagnostic agent for paresis. COLLOIDAL MERCURY: In treatment of syphilis.
  • 10. PHARMACEUTICAL APPLICATIONS NATURAL COLLOIDS  Plasma protein. COLLOIDAL ELECTROLYTES.  Increase solubility,stability and taste of compounds,in lyophillic colloids. STABILITY OF DRUGS:  lyophobic colloids.  and prevent flocculation .
  • 11. gelatin coating over tablets and granules.  For protection. DISSOLUTION AND ABSORBTION:  Both enhance due to huge surface area.  sulphur colloid. 
  • 12. PHARMACEUTICAL APPLICATIONS TARGETED DRUG DELIVERY:  Liposomes.  Vessicles of phospholipids.  As a drug carrier to promote controlled release of drug in body.  Taken up by the liver and spleen.
  • 13. APPLICATIONS IN FOOD INDUSTRY:     Many of our foods are colloidal in nature. Milk is an emulsion of butterfat in water protected by a protein, casein. Salad dressing, gelatin deserts, fruit jellies. Ice cream & Bread.
  • 14. INDUSTRIAL APPLICATIONS
  • 15. NON-DRIP PAINTS:  All paints are colloidal dispersions of solid pigments in a liquid medium.  paints also contain longchain polymers.  At rest, the chains of molecules are coiled.  stress is applied with a paint brush, the coiled molecules straightened.  This renders the paint ‘nondrip’.
  • 16. INDUSTRIAL APPLICATIONS Sewage disposal:  Colloidal particles of the dirt, mud etc. carry electric charge.  the colloidal particles are coagulated when sewage water is passed through the plates kept at a high potential.  the suspended matter gets removed. 
  • 17. INDUSTRIAL APPLICATIONS   Cleansing action of soap: Soap solution is colloidal in nature. It removes the dirt particles either by adsorption or by emulsifying.
  • 18. OTHER APPLICATIONS  Photography: A colloidal solution of silver bromide in gelatin is applied on glass plates or celluloid films to form sensitive plates in photography.
  • 19. OTHER APPLICATIONS
  • 20. OTHER APPLICATIONS Clarification of Municipal water:  The municipal water contains colloidal particles.  Alum which yield ions, Al3+ is added to water to coagulate the negatively charged clay particles. Al3+ + 3H2O ---- Al(OH)3 + 3H+ Al(OH)3 + 4H2O + H+ ----- Al(OH)3(H2O)4 
  • 21. OTHER APPLICATIONS Artificial Kidney machine:  The human kidneys purify the blood by dialysis through natural membranes.  The toxic waste products such as urea and uric acid pass through the membranes  colloidal-sized particles of blood proteins (haemoglobin) are retained
  • 22. OTHER APPLICATIONS  The phenomenon of the scattering of light by the sol particles is called Tyndall effect.
  • 23. CONCLUSION: A knowledge of colloid chemistry is essential to understand some of the various natural phenomena around us.  Colloids make up some of our modern products.  Dialysis,life saving treatment. 
  • 24. QUESTIONS?