Title page for ETD etd-04142014-151305

Type of Document Master's Thesis
Author Abedin, Rubaiyet
URN etd-04142014-151305
Title Effect of process mixing on the size distribution and mean diameter of the thiol-triacrylate microcapsules
Degree Master of Science (M.S.)
Department Chemical Engineering
Advisory Committee
Advisor Name Title
Knopf, F. Carl Committee Chair
Pike, W. Ralph Committee Member
Pojman, John Committee Member
  • Trithiol-triacrylate microparticle
  • size distribution
  • piston driven oscillatory reactor
  • process mixing
  • reactor with three blade propeller
Date of Defense 2014-04-04
Availability unrestricted
An important limitation in the development of the microparticles is the difficulty to develop a precise size distribution. Microparticles have a wide spread applicability in different fields including medical, pharmaceutical, textile, cosmetics, pesticide, printing industry, etc. The large and growing impact of microencapsulation in different fields of technology has made this process important. Microparticle size is a primary determinant of control release mechanism and the reaction kinetics and also impacts the allowable routes of administration, The main objective of this research work is to evaluate the effect of the process mixing on the size and size distribution of the trithiol-triacrylate microparticles prepared via dispersion polymerization using the primary amine catalyzed addition of trithiol to triacrylate. The influence of several synthesis parameters such as, the stirring rate, oscillation frequency and amplitude, surfactant concentration in the aqueous phase on the size distribution of the microparticles has been investigated. A comparison between the reactor with three blades propeller and oscillatory reactor in terms of particle size distribution and energy dissipation per unit mass has been reported. A laboratory investigation has been performed to identify the most suitable reactor based on the desired size distribution of the micropartcles. The experimental results indicate that oscillatory reactor is more suitable to achieve small particle size and narrow size distribution.
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