Events

Description:

Magnetorheological Polymer Fluids

Prof. Alan Fuchs
Chemical and Materials Engineering
University of Nevada, Reno

Abstract

Intelligent materials have properties which may be controlled by imposition of an external field. This presentation describes a surface grafting technique for poly(fluorostyrene) onto iron particles via atom transfer radical polymerization (ATRP). This results in the synthesis of thermal–oxidatively stable, high viscosity magnetorheological fluids (HVMRFs). Grafted poly(fluorostyrene)–iron particles were synthesized by immobilizing 2-4(-chlorosulfonylphenyl)-ethytrichlorosilane to the iron particles through the covalent bond of a silanol group, followed by the polymerization of 4-fluorostyrene monomer. We found that the HVMRF prepared from surface coated iron particles has excellent thermal stability and constant viscosity. Also, these materials exhibit a large change in shear yield stress for on-state as compared to a benchmark HVMRF and non-surface coated iron particle HVMRF. In addition, the properties of surface grafted poly(fluorostyrene)–iron particles were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy–X-ray energy dispersive spectroscopy, and differential scanning calorimetry. The grafted poly(fluorostyrene)–iron particles showed a higher thermal transition temperature as compared to bulk polymer because the covalent bond between the polymer backbone and the surface of the iron particles restricts the molecular mobility.

Speaker Background

Dr. Alan Fuchs is an Associate Professor of Chemical Engineering at the University of Nevada, Reno since 2004 and has been at UNR since 1998. During this time he has developed the first Polymer Science and Engineering Laboratory in the State of Nevada. His laboratory has been successful in attracting funded research projects in several areas relating to polymeric materials development. These areas include membranes for fuel cells, intelligent materials, electronic materials, biomaterials and materials for environmental applications. Development of novel polymeric materials requires accomplishments in the areas of chemistry, physics and engineering and collaborations have been initiated in these departments at UNR and UNLV as well as collaborations at the National Renewable Energy Laboratory, Lawrence Berkeley National Laboratories, Arizona State University, University of California, Riverside, Colorado State University, University of Minnesota and several other institutions. He has been Chair of the Chemical and Metallurgical Engineering Department since January 2010.

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Date:

Monday July 12

Location:

Michael's Restaurant at Shoreline Park Mountain View, CA  94043
Directions  Map

Timing:

6 PM social hour
7 PM dinner
8 PM lecture

Cost:

	Employed/postdoc	Student/unemployed/retired
Early Registration - Up to 7 days in advance of deadline	$30	$15
Registration - Up to deadline	$35	$20
After deadline/walk-in (Availability NOT guaranteed)	$40	$25

 
Lecture-only is free.

Payment:

We accept cash or checks, but are unable to accept payment by credit card at this time. Payment is taken at the door.  No-shows are responsible for full payment of registration fee.

Registration:

Please register on the web page https://ggpf.mystagingwebsite.com/ or contact:
Len Radzilowski
email: lradzilo@tycoelectronics.com
phone: 650-361-3264

Deadline for registration:

5PM, Friday July 2 for early registration discount
5PM, Friday July 9 for registration (or until venue has reached capacity.)

Dinner Selections:

Salmon filet with beurre blanc
Chicken Florentine
Eggplant Parmagiana

You should receive confirmation of your registration; if not, please contact us again.