hope college chemistry    
hope college > academic departments > chemistry        

 
People <
Research <
Seminars <
Facilities <
Major Program Catalog Description <
Safety Site <
Chem Club <
Professional Development for Chem Majors <
Alumni <
Chem Camp <
Lil Chem Club <
News <
Prospective Students <
 

Research - Dr. Michael E. Silver

Polymer Research: Novel Silicone Surfactants and Vesicles

We have developed a class of water dispersible, intermediate HLB (hydrophilic-lipophilic balance) alkylsiloxane-dimethylsiloxane-oxyalkylene copolymers whose stable dispersions in water consist of submicron micelles and multilamellar vesicles.


The cryogenic-Transmission Electron Microscope (cryo-TEM) image below shows smaller vesicles within a multilamellar vesicle.

 

These surfactant/emulsifiers do not possess a cloud point, yet demonstrate cmc's (critical micelle concentrations) similar to surfactants that do. These materials are being studied as emulsifiers for cosmetic formulations, foam stabilizing surfactants for polyurethane foams, and water dispersible polyurethane mold-release agents. Our project involves organic and inorganic synthesis via standard laboratory and industrial (pressurized reactor) techniques, characterization via NMR, IR, UV, GPC, HPLC, Si-H determination, particle size determination via laser light scattering, cryogenic transmission electron microscopy, surface energy and viscosity determination, computational methods, and is done in collaboration with various university and industrial partners.