Multiscale fibers via supramolecular self-assembly of a fully rigid,discotic aromatic aramid molecule |
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| Affiliation: | 1. National Synchrotron Radiation Lab., College of Nuclear Science and Technology, Hefei, China;2. CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China;3. School of Chemical and Biomedical Engineering, Nanyang Technological University, 637457 Singapore, Singapore;1. Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan;2. Nanosciences and Catalysis Division, National Centre for Physics, Islamabad, Pakistan;3. Department of Physics, COMSATS Institute of Information Technology, Islamabad 44000, Pakistan;1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;2. Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100871, China;1. Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands;2. Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA;3. Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands;1. Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Pierce Hall 318, Cambridge, MA 02138, USA;2. US Army Combat Capabilities Development Command Soldier Center, Natick, MA 01760, USA;3. Department of Chemistry and Life Science, United States Military Academy, West Point, NY 10996, USA |
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| Abstract: | We synthesized a fully rigid, water soluble discotic-shaped aromatic aramid molecule, which can spontaneously self-assemble into multiscale fibers (from nano- to micro-scale in both length and diameter), depending on the molecular states (e.g., solution, liquid crystals and solid state). In diluted solution (below 0.086 g/mL), the discotic molecule tend to self-assemble into nanofibers. As the concentration increased (0.086–0.28 g/mL), it exhibits supramolecular liquid crystalline phase with microfiber texture. While, solid power under circumstance with 83% relative humidity favors the formation of rod-like shaped polymorphic crystals in macroscopic size. The unique ‘self-fiber-forming’ property of discotic molecules in different states makes them become an easy processing aramid fiber material, and also allow us to easily prepare microfilm with parallel-aligned nanofibers, which could be a promising candidate for ion conductivity material such as polymer proton exchange membrane (PEM) for fuel cell. |
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| Keywords: | Multiscale fibers Discotic molecule Self-assembly Polymers Microstructure X-ray techniques |
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