Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 163, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2022.107232
Keywords
Polymer -matrix composites (PMCs); Interface/interphase; Rheological properties
Funding
- Sichuan Science and Technology Program [2020YJ0261]
- Fundamental Research Funds for the Central Universities [2021SCU12069]
- Sichuan University postdoctoral interdisciplinary Innovation Fund
- Program for Featured Directions of Engineering Multidisciplines of Sichuan University [2020SCUNG203]
- Joint Project for the Talent Innovation Sharing Alliance of Quanzhou [2021C064L]
- Shiyanjia Lab
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In this study, mechanical grinding was used to disperse MXene particles in PVA aqueous solution and delaminate them into nanosheets. The results showed that the increased specific surface area and functional groups of delaminated MXene nanosheets greatly improved the interfacial interactions and gel network of MXene-PVA composites, leading to enhanced mechanical properties and electrical/thermal conductivities.
The applications of MXene/polymer-based functional materials have been widely reported, while the under-standing of the structural evolution of MXene/polymer composites during combination is still limited. Herein, mechanical grinding is applied for the delamination and dispersion of multilayer MXene particles in PVA aqueous solution, during which they are gradually delaminated into nanosheets. Low-field nuclear magnetic resonance spectroscopy and rheological properties analysis demonstrate that the specific surface area and exposed functional groups of MXene sheets are drastically increased, which greatly contributes to the con-struction of MXene-PVA interfacial interactions and the enhancement of gel networks. Furthermore, the exfo-liated MXene nanosheets are uniformly distributed in the resultant MXene/PVA composite films, which greatly facilitates the stress transfer and the transportation of electrons/phonons, leading to significantly improved mechanical properties and electrical/thermal conductivities. This work provides fruitful insights into the opti-mized fabrication of MXene/polymer composites.
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