Abstract
Polymer nanocomposites (PNCs) are new-emerging multicomponent polymer composites consisting of a polymer matrix and well dispersed nanofillers. Nanofillers can be divided into one-dimensional, two-dimensional (2D), or three-dimensional nanoparticles according to their dimensions. Due to their outstanding physical properties, the achievement of homogeneous dispersion of 2D nanofillers in the polymer matrix plays a decisive role in the fabrication of high-performance and multifunctional PNCs. The construction of 2D nanosheets into hybrid nanofillers provides a new idea for achieving homogeneous dispersion of 2D nanofillers in the polymer matrix. In this review, recent developments on the design strategies and controllable preparation methods of hybrid nanofillers containing 2D nanosheets are summarized. The preparation, structure, and physical properties of PNCs with 2D nanosheet-constructed hybrid nanofillers are discussed in detail. Finally, challenges and future prospects of PNCs with 2D nanosheet-constructed hybrid nanofillers are highlighted.
Highlights
Polymer nanocomposites (PNCs) are new-emerging polymer composites consisting of a polymer with nanofillers dispersed in the polymer matrix
2D nanosheets with the features of high surface area, large radius-to-thickness ratio, and superior physical properties are intensively triggering the fast development of high-performance PNCs.1 2D nanosheets are easy to agglomerate because of their high surface energy, because of which it is difficult to achieve uniform dispersion in the polymer matrix and greatly limits the application of 2D nanosheets in high-performance PNCs
The fabrication of 2D nanosheet-constructed hybrid nanofillers is beneficial to improve the uniform dispersion of the elementary nanoparticles among hybrid nanofillers in the polymer matrix
Summary
Polymer nanocomposites (PNCs) are new-emerging polymer composites consisting of a polymer with nanofillers dispersed in the polymer matrix. 2D nanosheets with the features of high surface area, large radius-to-thickness ratio, and superior physical properties are intensively triggering the fast development of high-performance PNCs.1 2D nanosheets are easy to agglomerate because of their high surface energy, because of which it is difficult to achieve uniform dispersion in the polymer matrix and greatly limits the application of 2D nanosheets in high-performance PNCs. The fabrication of 2D nanosheet-constructed hybrid nanofillers is beneficial to improve the uniform dispersion of the elementary nanoparticles among hybrid nanofillers in the polymer matrix.. The enhancement of PNCs with single-component nanofillers is somewhat at an unsatisfactory level, and the construction of PNCs with two kinds of nanofillers is beneficial to synergistically improve physical properties of PNCs by combining desirable elementary nanoparticles into hybrid nanofillers according to their various functions.. Compared with the MMT, graphene is one kind of nanofillers with extremely low density for fabricating multifunctional PCNs due to its superior mechanical, electrical, and thermal properties.. An outlook in terms of the preparations and applications of hybrid nanofillers for highperformance PNCs is highlighted
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