Page 123 - CatalogNEP-PS

 To develop requisite intellectual and laboratory skills.

LEARNING OUTCOMES:

The student will be able to
 understand the processes associated with surface chemistry.
 have an insight into the processes involving macromolecules

THEORY (45 Hours)

UNIT-I (11 Hours)
Surface tension and surface free energy (theory and measurement methods), Capillarity Contact
angle (theory and measurement methods), wetting, Surface forces, Surface films on liquid
substrates (surface potential, monomolecular films, Langmuir Blodgett layers), Electrical aspects
of surface chemistry (electrical double layer, zeta potential,)Solid liquid interface, stability of
dispersions, Adsorption, adsorption isotherms Langmuir and BET adsorption (derivation), Gibbs
adsorption equation and its derivation from thermodynamic considerations. Characterization of
colloidal particles including Brownian movement, Electrokinetic phenomena, Stabilization of
colloidal systems and theories of stability; zeta potential, Coagulation, Flocculation of colloids by
electrolytes and its mechanism.

UNIT-II (11 Hours)
Precipitation of sols by electrolytes, Hardy Schulz rules, other methods of precipitation.
Detergency, surfactants, self-assembly, micelles and vesicles Emulsions, foams, and aerosols
Thermodynamics of micellization, Phase separation and Mass action models, Solubilization,
Mechanism of formation of microemulsion and their stability, Fish cut and triangular Phase maps
(Two component, three component, pseudo-terinary), Applications of colloid and surface science
in petroleum recovery, coating and painting, food, pharmaceutical and cosmetic industry
Introduction
UNIT-III (12 Hours)
Macromolecular concept. Molar mass averages, distribution of molecular mass. Kinetics of
Polymerizaton Kinetics of step growth polymerization, size distribution in linear polymers.
Kinetics of free radical addition polymerization, distribution of molar masses, effect of
temperature. Ionic polymerization, kinetics of cationic and anionic polymerization. Statistics of
Linear Polymer Chains Polymer chain flexibility and internal rotation, random flight analysis of
end-to end distance for freely jointed chain in one dimension and three dimensions. Effect of bond
angle and restricted rotation on chain dimensions. Unperturbed chains. Long-range interactions
and effect of solvent. Distribution of chain segments relative to centre of mass.
UNIT-IV (11 Hours)

Thermodynamics of Macromolecular Solutions Flory-Huggins theory. Flory-Krigbaum theory of
dilute solutions, partial molar quantities. Osmotic pressure. Characterization of Macromolecules
Flow properties, generalized flow equation. Frictional co-efficient and flow properties.
Determination of molecular size and mass from diffusion, sedimentation velocity, sedimentation
equilibrium and viscosity. Light scattering and small angle X-ray scattering.

PRACTICAL (30 Hours)

1. Surface Tension Measurements:
i. Study the variation of surface tension with different concentration of detergent solutions.
Determine CMC.
ii. Study the effect of the addition of solutes on the surface tension of water at room
temperature and explain the observations in terms of molecular interactions:

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