M3TC
MINERALS, METALS AND MATERIALS TECHNOLOGY CENTRE
FACULTY OF ENGINEERING
National University of Singapore
EA-06-15, 9 Engineering Drive 1 Singapore 117576
Tel: (65) 6516 8296
Fax: (65) 6777 6235
AN INVITATION TO M3TC SEMINAR
TOPIC
Production of Particles –Applications and Optimization of Nano-Emulsion and
Micro-Emulsion
SPEAKER
A/Prof. Zongyuan Xiao
Department of Chemical and Biochemical Engineering
Xiamen University
CHAIRED BY
Dr. Lim Wee Chuan Eldin
Friday - 6 July 2012
3.00 to 4.30 pm
EA-06-03 , Faculty of Engineering, National University of Singapore
NUS Campus Map
DATE
TIME
VENUE
Emulsion with different range of droplet size has various kinds of properties, which make them of
interest to practical applications as well as fundamental investigation. The most important
applications are the preparation of nanoparticles inside the spatially confined volume of individual
microreactors with nano-emulsion and the microencapsulation of bioactive compounds with microemulsion to maintain their bioactivity and protect them from chemical degradation, e.g. oxidation.
SYNOPSIS
In general, miniemulsions consist of small, stable, and narrowly distributed droplets in a continuous
phase. The high stability of the droplets is ensured by the combination of the amphiphilic component,
the surfactant and the co-stabilizer, which is soluble and homogeneously distributed in the droplet
phase. Such small droplets can then act as nanocontainers in which reaction of the droplets, resulting
in most cases in the formation of nanoparticles. According to the establishment of W/O nanoemulsion systems, metal nanoparticles with narrow size distribution may be produced within the
microreactors, which can confine the nanoparticles’ growth and control their morphological structures
successfully.
Packing of particles in dry conditions is crucial for bio-active compounds to maintain their
bioactivity. For example, DHA (docosahexenoic acid) is essential nutrients for human body especially
for infants, but the storage and transportation are the key problems for its industrialization because
DHA is easily oxidizable. Microencapsulation with micro-emulsion (O/W) is a very important choice
for the packing of DHA with environment-friendly emulsifiers (sodium casseinate, capsul, purity gum
etc.).
Dr. Zongyuan Xiao received his Bachelors degree in Chemical Engineering in 1995 from Zhejiang
University, China. After several years of industrial experience, he began his study at the National
University of Singapore in 2001 and received his Ph.D. degree in Chemical Engineering in 2005. He
joined the Department of Chemical and Biochemical Engineering at Xiamen University, China in
2006 as an Assistant Professor and was promoted to Associate Professor in 2009. His research
interests include fluid mechanics, fine chemistry industry, and particle science and technology. He is
currently leading several big industrial projects with total funding of 6.8 million RMB.
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A D M I S S I O N F R E E.
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