Quantifying Polymer Chain Orientation in Strong and Tough Nanofibers with Low Crystallinity: Toward Next Generation Nanostructured Superfibers

Papkov, Dimitry; Delpouve, Nicolas; Delbreilh, Laurent; Araujo, Steven; Stockdale, Taylor; Mamedov, Sergey; Maleckis, Kaspars; Zou, Yan; Andalib, Mohammad Nahid; Dargent, Eric; Dravid, Vinayak P.; Holt, Martin V.; Pellerin, Christian; Dzenis, Yuris A.

doi:10.1021/acsnano.8b08725

Title: Quantifying Polymer Chain Orientation in Strong and Tough Nanofibers with Low Crystallinity: Toward Next Generation Nanostructured Superfibers

Journal Article · Tue Apr 30 00:00:00 EDT 2019 · ACS Nano

DOI:https://doi.org/10.1021/acsnano.8b08725· OSTI ID:1562281

Papkov, Dimitry ^[1];

^[2];

^[2]; Araujo, Steven ^[2]; Stockdale, Taylor ^[3]; Mamedov, Sergey ^[4]; Maleckis, Kaspars ^[5]; Zou, Yan ^[6]; Andalib, Mohammad Nahid ^[3]; Dargent, Eric ^[2];

^[7]; Holt, Martin V. ^[8];

^[9];

^[1]

Univ. of Nebraska - Lincoln, Lincoln, NE (United States). Dept. of Mechanical and Materials Engineering; Univ. of Nebraska - Lincoln, Lincoln, NE (United States). Nebraska Center for Materials and Nanoscience
Normandie Univ., Rouen (France). Département Systèmes Désordonnés et Polymères, Equipe Internationale de Recherche et de Caractérisation des Amorphes et des Polymères
Univ. of Nebraska - Lincoln, Lincoln, NE (United States). Dept. of Mechanical and Materials Engineering
Division of HORIBA Instruments, Inc.,Piscataway, NJ (United States)
Univ. of Nebraska - Lincoln, Lincoln, NE (United States). Dept. of Mechanical and Materials Engineering; Univ. of Nebraska Medical Center, Omaha, NE (United States). Dept. of Surgery
Univ. of Nebraska - Lincoln, Lincoln, NE (United States). Dept. of Mechanical and Materials Engineering; Huazhong Univ. of Science and Technology, Wuhan, Hubei (China). Dept. of Mechanics
Northwestern Univ., Evanston, Illinois (United States). Dept. of Materials Science and Engineering
Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
Univ. de Montréal, Montréal (Canada). Département de chimie

Advanced fibers revolutionized structural materials in the second half of the 20th century. However, all high-strength fibers developed to date are brittle. Recently, pioneering simultaneous ultrahigh strength and toughness were discovered in fine (<250 nm) individual electrospun polymer nanofibers (NFs). This highly desirable combination of properties was attributed to high macromolecular chain alignment coupled with low crystallinity. Quantitative analysis of the degree of preferred chain orientation will be crucial for control of NF mechanical properties. However, quantification of supramolecular nanoarchitecture in NFs with low crystallinity in the ultrafine diameter range is highly challenging. Here, we discuss the applicability of traditional as well as emerging methods for quantification of polymer chain orientation in nanoscale one-dimensional samples. Advantages and limitations of different techniques are critically evaluated on experimental examples. It is shown that straightforward application of some of the techniques to sub wavelength-diameter NFs can lead to severe quantitative and even qualitative artifacts. Sources of such size-related artifacts, stemming from instrumental, materials, and geometric phenomena at the nanoscale, are analyzed on the example of polarized Raman method but are relevant to other spectroscopic techniques. A proposed modified, artifact-free method is demonstrated. Outstanding issues and their proposed solutions are discussed. The results provide guidance for accurate nanofiber characterization to improve fundamental understanding and accelerate development of nanofibers and related nanostructured materials produced by electrospinning or other methods. Overall, we expect that the discussion in this review will also be useful to studies of many biological systems that exhibit nanofilamentary architectures and combinations of high strength and toughness.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); US Department of the Navy, Office of Naval Research (ONR); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1562281

Journal Information:: ACS Nano, Vol. 13, Issue 5; ISSN 1936-0851

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 46 works

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36 MATERIALS SCIENCE
chain orientation quantification
characterization of subwavelength-diameter nanofibers
continuous nanofibers
electrospinning
low crystallinity
macromolecular orientation
nanoscale-related artifacts
simultaneously strong and tough nanofibers
size effects in nanofibers

Title: Quantifying Polymer Chain Orientation in Strong and Tough Nanofibers with Low Crystallinity: Toward Next Generation Nanostructured Superfibers

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