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Title: Dispersions of Aramid Nanofibers: A New Nanoscale Building Block

Abstract

Stable dispersions of nanofibers are virtually unknown for synthetic polymers. They can complement analogous dispersions of inorganic components, such as nanoparticles, nanowires, nanosheets, etc. as a fundamental component of a toolset for design of nanostructures and metamaterials via numerous solvent-based processing methods. As such, strong flexible polymeric nanofibers are very desirable for the effective utilization within composites of nanoscale inorganic components such as nanowires, carbon nanotubes, graphene, and others. Here stable dispersions of uniform high-aspect-ratio aramid nanofibers (ANFs) with diameters between 3 and 30 nm and up to 10 μm in length were successfully obtained. Unlike the traditional approaches based on polymerization of monomers, they are made by controlled dissolution of standard macroscale form of the aramid polymer, that is, well-known Kevlar threads, and revealed distinct morphological features similar to carbon nanotubes. ANFs are successfully processed into films using layer-by-layer (LBL) assembly as one of the potential methods of preparation of composites from ANFs. The resultant films are transparent and highly temperature resilient. They also display enhanced mechanical characteristics making ANF films highly desirable as protective coatings, ultrastrong membranes, as well as building blocks of other high performance materials in place of or in combination with carbon nanotubes.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC); Center for Solar and Thermal Energy Conversion (CSTEC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1065750
DOE Contract Number:  
SC0000957
Resource Type:
Journal Article
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 5; Journal Issue: 9; Related Information: CSTEC partners with University of Michigan (lead); Kent State University; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; solar (photovoltaic), solar (thermal), phonons, thermal conductivity, thermoelectric, electrodes - solar, defects, charge transport, materials and chemistry by design, optics, synthesis (novel materials), synthesis (self-assembly)

Citation Formats

Yang, Ming, Cao, Keqin, Sui, Lang, Qi, Ying, Zhu, Jian, Waas, Anthony, Arruda, Ellen M., Kieffer, John, Thouless, M. D., and Kotov, Nicholas A. Dispersions of Aramid Nanofibers: A New Nanoscale Building Block. United States: N. p., 2011. Web. doi:10.1021/nn2014003.
Yang, Ming, Cao, Keqin, Sui, Lang, Qi, Ying, Zhu, Jian, Waas, Anthony, Arruda, Ellen M., Kieffer, John, Thouless, M. D., & Kotov, Nicholas A. Dispersions of Aramid Nanofibers: A New Nanoscale Building Block. United States. doi:10.1021/nn2014003.
Yang, Ming, Cao, Keqin, Sui, Lang, Qi, Ying, Zhu, Jian, Waas, Anthony, Arruda, Ellen M., Kieffer, John, Thouless, M. D., and Kotov, Nicholas A. Tue . "Dispersions of Aramid Nanofibers: A New Nanoscale Building Block". United States. doi:10.1021/nn2014003.
@article{osti_1065750,
title = {Dispersions of Aramid Nanofibers: A New Nanoscale Building Block},
author = {Yang, Ming and Cao, Keqin and Sui, Lang and Qi, Ying and Zhu, Jian and Waas, Anthony and Arruda, Ellen M. and Kieffer, John and Thouless, M. D. and Kotov, Nicholas A.},
abstractNote = {Stable dispersions of nanofibers are virtually unknown for synthetic polymers. They can complement analogous dispersions of inorganic components, such as nanoparticles, nanowires, nanosheets, etc. as a fundamental component of a toolset for design of nanostructures and metamaterials via numerous solvent-based processing methods. As such, strong flexible polymeric nanofibers are very desirable for the effective utilization within composites of nanoscale inorganic components such as nanowires, carbon nanotubes, graphene, and others. Here stable dispersions of uniform high-aspect-ratio aramid nanofibers (ANFs) with diameters between 3 and 30 nm and up to 10 μm in length were successfully obtained. Unlike the traditional approaches based on polymerization of monomers, they are made by controlled dissolution of standard macroscale form of the aramid polymer, that is, well-known Kevlar threads, and revealed distinct morphological features similar to carbon nanotubes. ANFs are successfully processed into films using layer-by-layer (LBL) assembly as one of the potential methods of preparation of composites from ANFs. The resultant films are transparent and highly temperature resilient. They also display enhanced mechanical characteristics making ANF films highly desirable as protective coatings, ultrastrong membranes, as well as building blocks of other high performance materials in place of or in combination with carbon nanotubes.},
doi = {10.1021/nn2014003},
journal = {ACS Nano},
issn = {1936-0851},
number = 9,
volume = 5,
place = {United States},
year = {2011},
month = {9}
}