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New permselective polymeric materials to enable the recovery and concentration of butanol from dilute aqueous solution, such as fermentation broth have been developed. Energy-efficient recovery of butanol is an essential enabling technology for the large-scale production of butanol as both a chemical building block, and eventually, biofuel.
Changing from a linear to a star block copolymer architecture can yield substantial improvements in the properties of thermoplastic elastomers (TPEs), such as their tensile strength and recovery from deformation. TPEs are melt-processable, reprocessable and recyclable, but typically show incomplete recovery from deformation when compared with conventional vulcanized elastomers.
Athanassios Panagiotopoulos, Susan Dod Brown Professor of Chemical and Biological Engineering, became chair of Princeton’s Department of Chemical and Biological Engineering on July 1.  He succeeds Richard Register, Eugene Higgins Professor of Chemical and Biological Engineering, who completed 8 years of service as department chair on June 30 and has returned to full-time research and teaching in the department.
The Blavatnik Family Foundation just announced that recent CBE / PCCM postdoctoral fellow Arash Nikoubashman won a 2015 Blavatnik Regional Award for Young Scientists in Chemistry. As stated in the announcement the awards were established in 2007 to honor outstanding postdoctoral scientists from institutions across New York, New Jersey, and Connecticut. Winners are awarded $30,000 each in unrestricted funds. Nikoubashman was recognized for simulations of self-assembly of block
In work described as “a major breakthrough” by the peer-reviewers, a Princeton CBE-led collaboration has synthesized new block and random copolymers which are exceptionally well-suited to the recovery of butanol from dilute aqueous solutions, such as fermentation broth; these materials could represent an important development in the energy-efficient continuous production of this chemical building block and potential biofuel.  Published in the October 13 issue of the American Che
Richard A. Register, Eugene Higgins Professor of Chemical and Biological Engineering, has been elected as a Fellow of the American Institute of Chemical Engineers (AIChE), as approved by the AIChE Board of Directors at their September meeting. As described in AIChE's Constitution and By-laws, election as Fellow—the highest grade of membership— “shall be recognition of professional attainment, and significant accomplishment in engineering.” Register will be recognized
Richard A. Register, Eugene Higgins Professor of Chemical and Biological Engineering, and Emily A. Carter, Gerhard R. Andlinger Professor and Associated Faculty in CBE, were named Fellows of the American Chemical Society (ACS) this week.  The ACS Fellows Program was established “to recognize members of ACS for outstanding achievements in and contributions to Science, the Profession, and the Society.”  Register was recognized for co-inventing block copolymer lithography, &nb
Recent collaborative work from the groups of CBE Professors Ilhan Aksay, Bob Prud’homme, and Rick Register has shown that functional graphene sheets (FGS) make effective multifunctional nano-fillers for several types of elastomers, simultaneously improving mechanical properties, reduce gas permeation, and impart electrical conductivity. This combination of property improvements is unavailable in any other filler, including carbon black and nanoclay, and result from the high aspect ratio an
CBE graduate student Sheng Li and Professor Rick Register, studying materials synthesized by alumna Sasha Myers *08, have recently uncovered an unexpectedly broad range of nanoscale structures in polymers containing chemically dissimilar crystallizable blocks.  Moreover, the structure can be tuned either through synthesis (total and block molecular weights), or through processing (such as crystallization during fiber drawing or quiescently).  The latter aspect of this work was featured
Color map of the orientation adopted by a sphere-forming block copolymer thin film following two sequential rotational shearing operations.
Professor Richard Register will be a recipient of the 2008 Graduate Mentoring Award.
An example of nanofabrication through the replication of a block copolymer thin film template. Top portion of the image shows an array of gold dots, 30 nm diameter and 18 nm thick, on a silicon wafer substrate. The lower potion shows the mask through which these dots were deposited: a 10 nm-thick silicon nitride membrane, perforated with holes of 30 nm diameter.
Two-dimensional small-angle x-ray scattering patterns reveal the nanostructure of two styrene-diene-styrene triblock copolymers which have been aligned through channel die compression. Left: a lamella-forming triblock showing a biaxial texture (four-spot pattern). Right: a cylinder-forming triblock showing a single-crystal texture (six-spot pattern).
X-ray diffraction pattern from a newly-synthesized diblock copolymer containing a linear (high-density) polyethylene block. As designed, the material self-assembles into a lamellar nanostructure, with layers of polyethylene alternating with layers of glassy polyvinylcyclohexane. Macroscopic alignment of the structure was achieved by planar extensional flow in a lubrication channel die.
Rick Register will be the recipient of a two-year Special Creativity Award from the Division of Materials Research of the National Science Foundation, as an extension to his current grant.
Almost 1,000 middle school students and teachers from Mercer County schools flocked to Princeton University to explore cutting-edge science and technology with university researchers during a campus-wide exposition on March 17. Among the presenters was Professor Rick Register, who explained to students the changing properties of molecules using bouncing rubber balls and dry ice. Also involved was postdoctoral student Steffen Berg, who used a soap bubble machine to illustrate some features of the