[UCI-Calit2] Applications of Polymeric Core-Shell Particles -- tomorrow, June 25

Anna Lynn Spitzer aspitzer at calit2.uci.edu
Thu Jun 24 14:31:49 PDT 2010



Title:                     Amphiphilic Polymeric Core-Shell Particles:
Novel Synthetic Strategy and Potential Applications of the Particles

Speaker:              Pauline Pei Li, The Hong Kong Polytechnic
University, Hong Kong, China

Time:                    2-3 p.m.

Date:                     Friday, June 25

Location:             Calit2 3008


(If you would like to meet with the speaker afterwards, please contact
goran at uci.edu <mailto:goran at uci.edu>  )


We have developed a novel and commercially viable route to a wide range
of highly uniform, amphiphilic core-shell particles in nano- to
micro-scaled sizes. A novel feature of this synthetic approach is that
it combines graft copolymerization, in-situ self-assembly of the
resulting amphiphilic graft copolymers and emulsion polymerization in a
one-step synthesis. This versatile methodology allows us to design and
tailor-make particles for specific applications through selection of
appropriate amino-containing water-soluble polymers and hydrophobic


Special features of this synthetic route and products include: 

*         The particles are easy to synthesize in high-solid content (up
to 30%) without using surfactant  

*         The particles have a well-defined core-shell nanostructure
ranging from nano-to micro-scale with narrow particle size distribution

*         The process uses aqueous-based chemistry, which is
environmentally benign 

*         The core properties of the particles can be varied (e.g. hard,
soft, temperature-sensitive and hollow)  

*         The shell component can use a wide range of amine-containing
water-soluble polymers such as synthetic and biopolymers 

*         Surface functionalities and properties can be easily altered


This process offers a commercially viable route to a wide variety of
novel core-shell particles with different sizes, compositions,
structures and functions. Applications of these unique particles in gene
and drug deliveries, enzyme immobilization, bioseparation, water
treatment, antibacterial and functional coatings have been demonstrated.




Li is an associate professor in the Department of Applied Biology and
Chemical Technology at The Hong Kong Polytechnic University. She
received her B.S. from Jinan University and her Ph.D from University of
Ottawa.  Her research interests include chemical modification of
polymers; synthesis of functional polymeric microspheres, core-shell
particles and smart microgels; nanotechnologies in gene and drug
delivery; bioseparation; immobilization; nano-composites; coatings;
waste water treatment and self-assembly. She has several journal and
conference publications, and two book chapters, as well as two U.S.
patents issued and several pending (see
http://www.polyu.edu.hk/abct/staff_lipei.php ).  She received the Bronze
Award in the fifth China International Invention Expo for her project
"Environmentally Friendly Antibacterial Treatment" (2004), a Special
Prize from the International Jury and a gold medal for her project
"Smart Core-Shell Nanosorbents for Wastewater Treatment" in the 35th
International Exhibition of Inventions, New Techniques and Products, and
the President's Award for Research and Scholarly Activities 2008, from
The Hong Kong Polytechnic University. She can be contacted at
bcpeili at polyu.edu.hk .





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