Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 219, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2021.109248
Keywords
Polymer nanocomposites; Interfacial strength; Ti3C2Tx MXene; Polybenzoxazine resin; Hydrogen bonds
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Funding
- Zhejiang Provincial Natural Science Foundation of China [LR20E030001]
- National Natural Science Foundation of China [U1909220, 51805524]
- Chinese Academy of Sciences [KFZD-SW-439]
- Science and Technology Innovation 2025 Major Project of Ningbo [2018B10013]
- National Ten Thousand Talent Program for Young Top-notch Talents, Ten Thousand Talent Program for Young Top-notch Talents of Zhejiang Province
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In this study, a strategy utilizing polar groups in MXene and purposefully constructed hydrogen bonds was employed to prepare Ti3C2Tx MXene/PBZ composites, achieving homogeneous dispersion of nanosheets and significant enhancement in properties.
The uniform distribution of hydrophilic two-dimensional nanosheets in hydrophobic polymeric matrix and strong interfacial interaction between them are of great significance for the fabrication of composites, but challenging. In this work, an easily-operating strategy to prepare Ti3C2Tx MXene/polybenzoxazine (PBZ) composites with homogeneous dispersion and enhanced comprehensive properties is reported, in which the rich polar groups on MXene surface and purposefully constructed hydrogen bonds (H-bonds) play crucial roles. Specifically, the oxygen and fluorine-containing terminations on Ti3C2Tx MXene surface were increased by varied etching conditions. Then, the composites were prepared by solvent-assisted drop-casting and annealing method. The H-bonds between MXene and benzoxazine can not only accelerate the ring-opening polymerization, but also enhance their interfacial interactions. Accordingly, the obtained composites exhibited excellent comprehensive properties, showing the enhancement in tensile strength of 22.1%, impact strength of 50%, and thermal conductivity of 67.3% when the filler content was only 2 wt%. This study provides us a H-bonds assisted method to disperse hydrophilic nanosheets in hydrophobic polymeric matrix for the fabrication of nanocomposites with enhanced properties.
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