Self-Healing and Recyclable Waterborne Polyurethane With Ultra-High Toughness Based on Dynamic Covalent and Hydrogen Bonds
Ruixue Zhai
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), Investigation (lead), Methodology (lead), Software (lead), Validation (lead), Writing - original draft (lead)
Search for more papers by this authorJiaqi Zhang
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Investigation (supporting)
Search for more papers by this authorJiawei Li
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Investigation (supporting)
Search for more papers by this authorChengyu Hong
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Software (supporting)
Search for more papers by this authorYiping Xu
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Investigation (supporting)
Search for more papers by this authorCorresponding Author
Qiong Song
School of Biological and Food Engineering, Jilin Engineering Normal University, Changchun, China
Correspondence:
Qiong Song ([email protected])
Chao Zhou ([email protected])
Contribution: Supervision (supporting)
Search for more papers by this authorCorresponding Author
Chao Zhou
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Correspondence:
Qiong Song ([email protected])
Chao Zhou ([email protected])
Contribution: Resources (supporting), Supervision (supporting), Writing - review & editing (supporting)
Search for more papers by this authorRuixue Zhai
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), Investigation (lead), Methodology (lead), Software (lead), Validation (lead), Writing - original draft (lead)
Search for more papers by this authorJiaqi Zhang
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Investigation (supporting)
Search for more papers by this authorJiawei Li
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Investigation (supporting)
Search for more papers by this authorChengyu Hong
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Software (supporting)
Search for more papers by this authorYiping Xu
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Contribution: Investigation (supporting)
Search for more papers by this authorCorresponding Author
Qiong Song
School of Biological and Food Engineering, Jilin Engineering Normal University, Changchun, China
Correspondence:
Qiong Song ([email protected])
Chao Zhou ([email protected])
Contribution: Supervision (supporting)
Search for more papers by this authorCorresponding Author
Chao Zhou
School of Chemical Engineering, Changchun University of Technology, Changchun, China
Correspondence:
Qiong Song ([email protected])
Chao Zhou ([email protected])
Contribution: Resources (supporting), Supervision (supporting), Writing - review & editing (supporting)
Search for more papers by this authorFunding: This work was supported by The Science and Technology Department of Jilin Province, No. 20240402051GH.
ABSTRACT
The implementation of self-healing properties in waterborne polyurethane (WPU) materials plays a pivotal role in resource conservation and pollution mitigation. In this work, a strategy was devised to balance the self-healing and mechanical properties of WPU by incorporating bis(hydroxyethyl) disulfide (HEDS), an aliphatic disulfide, as a chain extender. The synthesized WPU constructed a dynamic molecular network through dynamic disulfide bonds (SS). Meanwhile, a physical cross-linked network was formed by dynamic hydrogen bonds from carbamate groups. The synergistic effect of the dual dynamic bonds significantly contributed to the remarkable self-healing capability of WPU. Specifically, the optimal sample (SWPU-15) not only exhibited a tensile strength of 33.42 MPa and toughness of 162.19 MJ/m3 but also achieved a healing efficiency of 81.9% when heated at 80°C for 4 h. Profiting from the abundant dynamic bonds, the SWPU-15 sample could be recycled through hot pressing or solvent treatment, with its tensile strength remaining above 20 MPa after recycling. This study provided a feasible approach for preparing environmentally friendly WPU with excellent performance and demonstrates promising prospects for potential applications.
Conflicts of Interest
The authors declare no conflicts of interest.
Open Research
Data Availability Statement
Research data are not shared.
Supporting Information
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