Large-scale self-assembled zirconium phosphate smectic layers via a simple spray-coating process

Minhao Wong, Ryohei Ishige, Kevin L. White, Peng Li, Daehak Kim, Ramanan Krishnamoorti, Robert Gunther, Takeshi Higuchi, Hiroshi Jinnai, Atsushi Takahara, Riichi Nishimura and Hung-Jue Sue ()
Additional contact information
Minhao Wong: Texas A&M University
Ryohei Ishige: Japan Science and Technology Agency (JST) ERATO Takahara Soft Interfaces Project and Institute of Materials Chemistry and Engineering (IMCE), CE80, Kyushu University
Kevin L. White: Texas A&M University
Peng Li: Texas A&M University
Daehak Kim: University of Houston
Ramanan Krishnamoorti: University of Houston
Robert Gunther: Dow Chemical, 200 Larkin Center
Takeshi Higuchi: Japan Science and Technology Agency (JST) ERATO Takahara Soft Interfaces Project and Institute of Materials Chemistry and Engineering (IMCE), CE80, Kyushu University
Hiroshi Jinnai: Japan Science and Technology Agency (JST) ERATO Takahara Soft Interfaces Project and Institute of Materials Chemistry and Engineering (IMCE), CE80, Kyushu University
Atsushi Takahara: Japan Science and Technology Agency (JST) ERATO Takahara Soft Interfaces Project and Institute of Materials Chemistry and Engineering (IMCE), CE80, Kyushu University
Riichi Nishimura: Kaneka Corporation, Frontier Materials Development Laboratories, 5-1-1, Torikai-Nishi, Settsu
Hung-Jue Sue: Texas A&M University

Nature Communications, 2014, vol. 5, issue 1, 1-12

Abstract: Abstract The large-scale assembly of asymmetric colloidal particles is used in creating high-performance fibres. A similar concept is extended to the manufacturing of thin films of self-assembled two-dimensional crystal-type materials with enhanced and tunable properties. Here we present a spray-coating method to manufacture thin, flexible and transparent epoxy films containing zirconium phosphate nanoplatelets self-assembled into a lamellar arrangement aligned parallel to the substrate. The self-assembled mesophase of zirconium phosphate nanoplatelets is stabilized by epoxy pre-polymer and exhibits rheology favourable towards large-scale manufacturing. The thermally cured film forms a mechanically robust coating and shows excellent gas barrier properties at both low- and high humidity levels as a result of the highly aligned and overlapping arrangement of nanoplatelets. This work shows that the large-scale ordering of high aspect ratio nanoplatelets is easier to achieve than previously thought and may have implications in the technological applications for similar materials.

Date: 2014
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DOI: 10.1038/ncomms4589

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