Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Preparation and Analysis of the Deployment Behavior of Shape Memory Polymer Composite Antennas

형상기억고분자 복합재료 안테나의 제조 및 전개 거동 분석

  • An, Yongsan (Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University) ;
  • Kim, Jinsu (Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University) ;
  • Goo, Nam Seo (Department of Advanced Technology Fusion, Konkuk University) ;
  • Park, Miseon (Agency for Defense Development) ;
  • Kim, Yeontae (Agency for Defense Development) ;
  • Park, Jong Kyoo (Agency for Defense Development) ;
  • Yu, Woong-Ryeol (Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University)
  • Received : 2018.10.15
  • Accepted : 2018.12.26
  • Published : 2018.12.31
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Abstract

Shape memory polymer composites have been studied for deployable antennas in space because they have advantages of lightweight, large deformability, good processability, and low cost. In this research, shape memory polymer composites (SMPCs) were manufactured using carbon nanotubes (CNTs) as reinforcements and were used to fabricate SMPC antenna. The SMPCs were prepared by dispersing CNTs in the polymer matrix. Various dispersion methods were investigated to determine the most suitable one, focusing on the mechanical properties of SMPCs including their fracture behavior. The shape memory properties of SMPCs were measured and finally, the deployment behavior of the SMPC antenna was analyzed.

형상기억고분자 복합재료는 가볍고, 변형률이 크며, 좋은 가공성과 비용적인 측면에서의 장점으로 우주환경에서 사용되는 전개형 안테나 재료로의 활용이 검토되고 있다. 본 연구에서는 탄소나노튜브를 보강재로 하여 물성이 향상된 형상기억고분자 복합재료를 제조하고, 이를 사용하여 전개형 안테나를 제작하였다. 탄소나노튜브를 형상기억고분자 기지재 안에 분산시키기 위해 다양한 방법이 사용되었고 물성적인 측면에서 우수한 분산 방법을 탐색하였다. 이렇게 제조된 형상기억고분자 복합재료의 형상기억거동을 평가하였고 형상기억고분자 복합재료 안테나의 전개 거동을 분석하였다.

Keywords

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Fig. 1. Materials used to synthesize shape memory polymer

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Fig. 2. Typical stress-strain curve of the shape memory test of SMP

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Fig. 3. (a) Dimensions of an antenna, (b) angle of the folded antenna, and (c) angle of the recovered antenna

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Fig. 5. Procedure of folding-deploying test of SMPC antenna. (a) folding (programming) process, (b) deploying (recovery) process

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Fig. 6. Morphologies of the fracture surfaces of (a) SMPC1, (c) SMPC2, and (e) SMPC3. (b), (d), and (f) are high–resolution images of (a), (c), and (e), respectively

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Fig. 7. The stress-strain curve of SMPCs (a) above the transition temperature and (b) below the transition temperature

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Fig. 8. The mechanical properties of SMPCs. (a) Elastic modulus, (b) tensile strength, and (c) elongation at break. The red circles and the black squares represent the test results above and below the transition temperature, respectively

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Fig. 9. Shape memory test results of the SMP and SMPCs

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Fig. 10. The deployment behavior of the SMPC antenna

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Fig. 4. Folding device of SMPC antenna for deployment test

Table 1. Transition temperatures of the SMP and SMPCs

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Table 2. Shape memory properties of the SMP and SMPCs

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Table 3. Shape recovery ratio of the SMP and SMPC antenna

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