Postdoc Yuval Vidavsky’s paper entitled Modulating Metallopolymer Mechanical Properties by Controlling Metal Ligand Crosslinking is featured as the cover article in the June issue of the Journal of Polymer Science: Polymer Chemistry. Yuval conceived, synthesized, and tested a series of polymers that can be reversibly crosslinked by addition and removal of copper cations, thereby tailoring the stiffness and strength. Further, he showed that the crosslink strength and therefore the dynamic behavior of the material could be modulated in the solid state by exposure to different gasses. PhD candidate Suwon Bae made a key contribution to this work by conducting and analyzing the mechanical experiments. Credit to first year graduate student Steven Yang for making the cover art from Yuval’s specimens.
Congratulations to Naigeng Chen for passing his B-exam yesterday with flying colors! His thesis entitled “Experimental and Computational Study of Non-woven Damage Mechanics” is well, a comprehensive experimental and computational study of non-woven damage mechanics, using a commercial polypropylene non-woven series (Typar SF) as his experimental system. This picture from right after the deliberations might seem like a highly posed congratulatory hand shake with committee member Prof Paul Dawson, but really its a candid shot of committee member Prof Leigh Phoenix with the thesis draft.
Our collaborative work with Minglin Ma’s group (Cornell Biological and Environmental Engineering) on a potential medical treatment for type 1 diabetes is now published in PNAS. The paper entitled “Designing a retrievable and scalable cell encapsulation device for potential treatment of type 1 diabetes” was led by Minglin’s PhD students Duo An and Alan Chiu. Our research group provided analysis of the mechanical robustness of each of the thread designs. This mechanical durability of the treatment delivery device is essential for its retrievability. Please see the Cornell press release for more information.
Advisor matching season is coming to a close and we have three new PhD candidates in the MMD lab. Welcome to Michael Buche, Steven Yang, and Joy Zhang who come from the fields of Theoretical and Applied Mechanics, Mechanical Engineering, and Materials Science and Engineering respectively.
Naigeng’s work on determining bond strength within non-wovens is now published in Experimental Mechanics. In this meticulous combined experimental and computational effort Naigeng outlines and then validates a method for determining the bond strength distribution within non-wovens formed from fiber-fiber bonds. This method can be used as long as the non-woven can be imaged (e.g. via computed tomography or confocal microscopy) and then mechanically tested. Please contact us if you would like help with implementation.
Mechanochemistry in Materials is now available for purchase. This book includes a chapter on mechanochemical transduction in bulk polymers by PI Silberstein and former graduate student Meenakshi Manivannan and also a chapter on mechanophore design for chemical function by collaborator Charles Diesendruck.
Cryomech and the MMD lab have won CCMR Jumpstart funding to investigate polymer seals. Undergraduate Kenneth Fang, who has been working in the lab since last spring, will take the lead on this project. Full story within the Cornell Chronicle.