Hossenlopp Research Group

 

Hossenlopp Research Group

Lab: TW 454

Lab Phone: (414) 288-2074

Recent group members at Harrington Beach State Park (left to right):Yolanda K. Jones (Ph.D. 2005, currently an assistant professor at Alcorn State University), Daniel Hall (Alcorn St. University undergrad), Everson Kandare (Ph.D. 2006, currently postdoctoral fellow at University of Bolton, UK) and Hongmei Deng (Ph.D. 2004, currently at Instrumental Analysis & Research Center at Shanghai University).

 

Projects:

 

A.  Layered Metal Hydroxide Materials: Fundamental Reactivity and   

     Development for Selected Applications

fig1

Hydroxy double salts and

other layered metal hydroxides have been synthesized in our laboratory.  A representative structure is shown to the right.  The composition of the metal

hydroxide layer and the identity of the interlayer

anions can be varied, providing tunability in structure

and properties.  Target applications include fire retardancy, chemical sensors, and drug delivery.

We also explore fundamental structure/reactivity Relationships in these materials.

Example:  Use of hydroxy double salts (HDSs) as additives to enhance thermal stability of polymers such as poly (methyl methacrylate) (PMMA)

 

fig2

 

 

 

 

 

 

Thermogravimetric analysis of PMMA, pure Zn/Cu hydroxy methacrylate HDS, and composites of PMMA with 2-4% by weight HDS.  The addition of small amounts of HDS stabilizes the PMMA against mass loss.

fig3 fig4

Cone calorimetry is used to evaluate heat release during polymer combustion – addition of copper-containing HDS additives serves to decrease total heat release (not all of the polymer burns).

 

Example: Model systems for controlled drug release

fig5

B.    Chemical Sensor Development

 

Our group also participates in an interdisciplinary program in chemical sensor development with collaborators Dr. Fabien Josse and Dr. Susan Schneider in the Department of Electrical and Computer Engineering.


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