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Novel Polyurethane Elastomer Modified by Hybrid Shell Nano-/Microcapsules for Unique Self-Lubricating Behavior

  • Runping Jia
    Runping Jia
    School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
    More by Runping Jia
  • Xin Liu
    Xin Liu
    School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
    More by Xin Liu
  • Zhixiong Huang
    Zhixiong Huang
    School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
  • Dayang Wang
    Dayang Wang
    School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
    More by Dayang Wang
  • Cheng Zhao
    Cheng Zhao
    School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
    More by Cheng Zhao
  • Zi Hui
    Zi Hui
    School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
    More by Zi Hui
  • Xinyao He*
    Xinyao He
    Jiahua Science &Technology Development (Shanghai) Ltd., Shanghai 201203, PR China
    *Email: [email protected]
    More by Xinyao He
  • , and 
  • Dandan Wu*
    Dandan Wu
    School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
    *Email: [email protected]
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Cite this: Ind. Eng. Chem. Res. 2020, 59, 51, 22123–22131
Publication Date (Web):December 13, 2020
https://doi.org/10.1021/acs.iecr.0c04586
Copyright © 2020 American Chemical Society
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Abstract

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Self-lubricating microcapsules containing liquid paraffin as the core material were successfully synthesized with polyurethane (PU)/silica (SiO2) as the hybrid shell material using a sol–gel process and an interfacial polymerization method. The self-lubricating microcapsules were adopted as the filling matrix, which was compounded with the PU elastomer through an in situ polymerization method to improve the self-lubricity of the PU elastomer. The self-lubricating properties of the PU composites with different mass fractions of microcapsules have been characterized by a plastic sliding friction and wear tester. The particle size of spherical microcapsules is about 540 nm and it can effectively reduce the friction coefficient and wear of PU materials. When the concentration of self-lubricating microcapsules is 1.2 wt %, the PU composite has the lowest average friction coefficient of 0.301. The friction coefficient and wear of composite materials reduce by 64.8 and 66.7% compared to those of pure PU elastomers. Meanwhile, the PU composites show better thermal stability and mechanical properties. The thermal decomposition temperature, tensile strength, and elongation at break increased by 4.6, 69.1, and 30.8%, respectively, which extended the service life of the PU elastomer in special fields. Finally, the friction and wear mechanism of the PU composites was discussed with scanning electron microscopy images. It was confirmed that by virtue of the flexible structure of the microcapsule shell material and the release of core materials, the friction and wear mechanism of PU composites changes from severe fatigue wear and adhesive wear to slight adhesive wear.

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  • Comparison of the mechanical and lubricating properties of the present work with the ones obtained by other researchers (PDF)

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Cited By

This article is cited by 5 publications.

  1. Ya-Jie Mao, Ping-Ping Gao, Zhao-Bo Sun, Jian-Hua Tang, Kun Dai, Hao Lin, Gan-Ji Zhong, Zhong-Ming Li. Tribological Properties of Self-Lubricating Thermoplastic Polyurethane/Oil-Loaded Microcapsule Composites Based on Melt Processing. Industrial & Engineering Chemistry Research 2021, 60 (44) , 16023-16031. https://doi.org/10.1021/acs.iecr.1c03271
  2. Jiahui Yan, Dechao Hu, Wenshi Ma, Weimin Chen. Preparation and characterization of soy polyols‐based PU shell microencapsulated phase change materials for reliable thermal energy storage. International Journal of Energy Research 2022, 46 (15) , 23364-23376. https://doi.org/10.1002/er.8635
  3. Yikai Wang, Dezhao Hao, Ming Yang, Xin Su, Pei Li, Qinze Liu, Xinglin Guo. Polyurethane antifouling coatings with various antifouling strategies in the side chain. Progress in Organic Coatings 2022, 173 , 107225. https://doi.org/10.1016/j.porgcoat.2022.107225
  4. Jingyu Ren, Xiangbin Dong, Yanjie Duan, Lin Lin, Xiaowei Xu, Jichao Shi, Runping Jia, Dandan Wu, Xinyao He. Synthesis and self‐healing investigation of waterborne polyurethane based on reversible covalent bond. Journal of Applied Polymer Science 2022, 139 (20) , 52144. https://doi.org/10.1002/app.52144
  5. Ziqi Cheng, Hanjun Gong, Zheng Wang, Lina Zhu, Guoxin Xie. Preparation of self-lubricating porous alumina ceramics with PMMA /PAO6 microcapsules and their tribological properties. Ceramics International 2022, 48 (6) , 8031-8038. https://doi.org/10.1016/j.ceramint.2021.12.003

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