BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT UID:930a51d66d5710602057a3970183a4e5 CATEGORIES:Colloquium CREATED:20180329T150900 SUMMARY:Professor Ryan Hayward DESCRIPTION:
Hosted by Professor Jason Zhang
Tuesday January 29, 2019
11:00AM, CCB Auditorium
“Fabrication and Assembly of Shape-programmed Polymer Sheets” p>
Spatially non-uniform stresses within thin elastic structures can be u sed to define a wide variety of buckling modes that provide control over th e three-dimensional shapes of materials. By incorporating stimuli-responsiv e polymer networks within such constructs, it is possible to prepare materi als with dynamically reconfigurable shapes and properties. As one example, our group has prepared single- and multi-layer films of polymer gels t hat undergo swelling-induced buckling into well-defined 3D forms. Such control of shape also allows for the precise definition of the interaction s between particles, for example due to capillary forces between patte rned sheets adsorbed at fluid interfaces. Moving beyond materials with a si ngle pre-defined shape transition, we seek to develop materials with shapes that can be continuously reprogrammed. In particular, we focus on photothe rmal actuation of nanocomposite gels, which allows for rapid and highly rev ersible shape changes and directed motion of gel sheets.
~Cof fee/tea will b served prior to lecture.~
X-ALT-DESC;FMTTYPE=text/html:Hosted by Professor Jason Zhang
Tuesday January 29, 2019
11:00AM, CCB Audit orium
“Fabrication and Assembly of Shape- programmed Polymer Sheets”
Spatially non-uniform stresses within thin elastic structures can be used to define a wide variety of buckling modes that provide control over the three-dimensional shapes of materials. By inc orporating stimuli-responsive polymer networks within such constructs, it i s possible to prepare materials with dynamically reconfigurable shapes and properties. As one example, our group has prepared single- and multi-l ayer films of polymer gels that undergo swelling-induced buckling into  ;well-defined 3D forms. Such control of shape also allows for the precise d efinition of the interactions between particles, for example due to capilla ry forces between patterned sheets adsorbed at fluid interfaces. Movin g beyond materials with a single pre-defined shape transition, we seek to d evelop materials with shapes that can be continuously reprogrammed. In part icular, we focus on photothermal actuation of nanocomposite gels, which all ows for rapid and highly reversible shape changes and directed motion of ge l sheets.
~Coffee/tea will b served prior to lecture.~
DTSTAMP:20240328T200113 DTSTART:20190129T160000 DTEND:20190129T170000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR