CE457/527- Colloid & Surface Phenomena

      University at Buffalo, SUNY - Department of Chemical Engineering
Registration Number 207112
• Class time and location Tuesday & Thursday 15:30 - 16:50; 103 Clemens Hall
• Instructor Prof. P. Alexandridis, 508 Furnas Hall, 6452911 x2210 palexand@eng.buffalo.edu
Office Hours Tuesday & Thursday 14:30-15:20
• Teaching Assistant Hongwang Zhang, 515 Furnas Hall hzhang5@acsu.buffalo.edu ; Di Wu, 504 Furnas Hall diwu@acsu.buffalo.edu
TA Office Hours TBA


**Check this page for Class updates **

Project due Tuesday April 9, 2002

April 16 (Tue), 3:30-4:50pm, 120 Clemens Hall Project presentations: [Yoghurt/Cheese] [Ice Cream] [Mayonaise/Margarine] [Chocolate]

April 18 (Thu), 3:30-4:50pm, 120 Clemens Hall Project presentations: [Make-up/Lipstick] [Shampoo] [Hair Conditioner] [Liquid Detergent]

April 30 (Tue), 3:30-4:50pm, 120 Clemens Hall Project presentations: [Moisturizing Lotion] [Sunscreen Lotion] [Disinfectant] [Beer/Wine]

• Background

Colloid science is concerned with particles of dimensions in the range 10-9 - 10-6 m (10Å - 1µm) which range from macromolecules (e.g., proteins, synthetic polymers) to finely subdivided multiphase systems (e.g., milk, aerosols). The interfacial area between colloidal particles and the surrounding medium is very large (e.g., 106 cm2 area per 1 cm3 of volume) and thus surface phenomena are prominent. Colloid and surface phenomena are important in biology (cell membranes, fat digestion), pharmaceuticals (drug formulation and delivery), consumer products (foods, detergents, cosmetics), materials (ceramics, polymers, paints, coatings, adhesives), imaging technology (inks, liquid crystals), geology (ore flotation, enhanced oil recovery, clay stability), environment (smog, wastewater treatment), chemical manufacturing (catalysts), etc.


Interaction forces (dispersion, Lewis acid-base, electrostatic) in interfacial systems; Surface and interfacial tensions and free energies; Colloidal interactions in water; Colloidal stability; Adsorption and adhesion (extended-DLVO approach); Kinetics of adhesion/adsorption; Surface properties of clays and other minerals; Biosurfaces; Association colloids formed by surfactants: micelles, bilayers, microemulsions, surfactant phase behavior; Detergency & emulsions; Polymer structure and properties in solid state & solution; Block copolymers, blends; Polymer surfaces, adhesion, composites; Applications of surfactants and polymers in paints & coatings; Characterization of colloids and surfaces; Colloid & surface phenomena in product design.

Textbooks (on reserve):

C. J. van Oss: "Interfacial Forces in Aqueous Media", Marcel Dekker, 1994.
R. J. Stokes & D. F. Evans: "Fundamentals of Interfacial Engineering", VCH-Wiley, 1997.

• Other related books (on reserve)

• Web-based resources

• Assessment

The course grade will be based on the following:

The midterm exams will test knowledge and comprehension of the material assigned in class, and also application and analysis of same.
The term project will focus on synthesis (create, predict, design, improve, propose) and evaluation (select, decide, critique, justify, verify, debate, assess, recommend). Students working in teams of four will be assigned a topic on applications of colloid and surface phenomena, prepare a written report on this topic, and present their findings in an oral presentation in class and at the CE457_527 website (where the Power Point presentation and report will be posted).
Project: students will work in teams of four on topics to be assigned in the first week of class.


• Syllabus

Click here for the course Syllabus

Project topics

Colloid and surface phenomena aspects of: (1)Yoghurt and Cheese, (2)Ice-cream (regular and low-fat), (3)Mayonaise (regular and low-fat), (4)Chocolate, (5)Beer and Wine, (6)Food thickerners, (7)Make-up, (8)Lipstick, (9)Sampoo, (10)Hair conditioner, (11)Moisturizing lotion, (12)Sunscreen lotion, (13)Liquid laundry detergent, (14)Disinfectant.

Click here for the project 2002 Term Projects -

Site Maintained by Hongwang Zhang
Last Updated, January 18, 2002
Any suggestions or comments are welcome.