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Polyaniline-based all-polymeric adhesive layer: An effective lightning strike protection technology for high residual mechanical strength of CFRPs

Journal Article · · Composites Science and Technology
 [1];  [2];  [3];  [3];  [4];  [4];  [5];  [6]
  1. Univ. of Tokyo (Japan). Dept. of Aeronautics and Astronautics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility (MDF)
  2. Univ. of Tokyo (Japan). Dept. of Aeronautics and Astronautics
  3. Japan Aerospace Exploration Agency, Tokyo (Japan)
  4. Yamagata Univ., Yamagata (Japan). Dept. of Organic Device Engineering
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility (MDF)
  6. Tokyo Univ. of Agriculture and Technology, Tokyo (Japan). Dept. of Mechanical Systems Engineering

Carbon fiber reinforced plastics (CFRPs) are vulnerable to lightning strikes due to their low electrical conductivity and low heat resistance. A lightning strike can damage CFRP structure catastrophically. Most common lightning strike protection (LSP) technology, consists of expanded metal foils/films on top of composite structures. This technology possesses disadvantages such as increased weight, galvanic corrosion, expensive integration and repair costs. In the present study, authors introduce a novel, easy to apply and all-polymeric LSP material. A doped intrinsic conductive polymer i.e. Polyaniline (PANI) dispersed in a thermosetting cross-linking polymer divinylbenzene (DVB) has been used to prepare an adhesive layer of 0.25–0.4 mm thickness. CFRP structure coated with PANI-based LSP layer, when tested against simulated lightning impulse current of 100 kA, demonstrated effective dissipation of the current, rendering almost 100% safety to the CFRP structure. PANI showed the capability to create a 3-D conductive network due to its self-assembling property, which makes it superior compared to its counterpart carbon/metal nano-filler based LSP technologies. Almost 100% residual strength of PANI-LSP protected CFRPs is reported in this work.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1494880
Alternate ID(s):
OSTI ID: 1777570
Journal Information:
Composites Science and Technology, Journal Name: Composites Science and Technology Journal Issue: C Vol. 172; ISSN 0266-3538
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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