Properties and characterization of near infrared-triggered natural rubber (NR)/carnauba wax (CW)/carbon nanotube (CNT) shape memory bio-nanocomposites

  • Sun-Mou LaiEmail author
  • Geng-Lun Guo
  • Kuan-Ting Han
  • Po-Sung Huang
  • Zhen-Lin Huang
  • Ming-Jun Jiang
  • Ya-Ru Zou


Very few studies have investigated on the blending of small molecules in the commercial biobased polymers with shape memory behavior. Herein, we investigated the shape memory properties of natural rubber and carnauba wax (S-NR/CW = 8:2, 6:4 and 5:5) melt-blends and nanocomposites vulcanized with sulfur/accelerators, using the melting temperature of wax as the switching temperature. With the addition of multi-walled carbon nanotube (CNT), the prepared S-NR/CW-CNT nanocomposites can not only enhance the mechanical properties but also enhance the shape fixity ratios, attributing to the unexpected improved dispersion of CW and the increased crystallinity of CW. In the one-way test, the shape fixity and recovery ratios for S-NR/CW/CNT 5:5 nanocomposites could reach up to 99.6% and 97.3% in the third thermomechanical cycle, respectively. In addition, CNT could be selectively and remotely heated by irradiation with near infrared laser to trigger shape memory process in a very short time. The additional paraffin wax was also blended with carnauba wax to form the wax mixture for preparing multi-shape memory behavior to exploit the various types of waxes with different melting temperatures (supplementary file). To the best of our knowledge, this is the first small molecule-filled NR nanocomposites with remotely-triggered shape memory properties.


Natural rubber Carnauba wax CNT Shape memory polymer And remotely-triggered 



A grant-in-aid from the R.O.C government under MOST 105-2221-E-197-027-MY3 is greatly appreciated. The authors are grateful to Mr. Yi Cheng Hsieh for his manuscript preparation.

Supplementary material

10965_2019_1742_MOESM1_ESM.docx (653 kb)
ESM 1 (DOCX 652 kb)


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Copyright information

© The Polymer Society, Taipei 2019

Authors and Affiliations

  1. 1.Department of Chemical and Materials EngineeringNational I-Lan UniversityI-LanTaiwan, Republic of China

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