Surface-Coated Thermally Expandable Microspheres with a Composite of Polydisperse Graphene Oxide Sheets

Shouzheng Jiao; Zhicheng Sun; Yang Zhou; Furong Li; Jinyue Wen; Yinjie Chen; Xiaoyang Du; Luhai Li; Yuanyuan Liu

doi:10.1002/asia.201901233

Surface-Coated Thermally Expandable Microspheres with a Composite of Polydisperse Graphene Oxide Sheets

Chem Asian J. 2019 Dec 2;14(23):4328-4336. doi: 10.1002/asia.201901233. Epub 2019 Nov 25.

Authors

Shouzheng Jiao¹, Zhicheng Sun¹, Yang Zhou², Furong Li¹, Jinyue Wen¹, Yinjie Chen¹, Xiaoyang Du¹, Luhai Li¹, Yuanyuan Liu²

Affiliations

¹ Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China.
² School of Chemical Engineering and Technology, Hainan University, Haikou, Hainan, 570228, China.

PMID: 31650678
DOI: 10.1002/asia.201901233

Abstract

Surface-modified thermally expandable microcapsules (TEMs) hold potential for applications in various fields. In this work, we discussed the possible surface coating mechanism and reported the properties of TEMs coated with polyaniline (PANI) and polydisperse graphene oxide sheets (ionic liquid-graphene oxide hybrid nanomaterial (ILs-GO)). The surface coating of PANI/ ILs-GO increased the corresponding particle size and its distribution range. The morphologies analyzed by scanning electron microscopy indicated that no interfacial gap was observed between the microspheres ink and substrate layer during the substrate application. The thermal properties were determined by thermogravimetric and differential thermal analyses. The addition of ILs-GO to the polyaniline coating significantly improved the thermal expansion and thermal conductivity of the microcapsules. The evaporation of hexane present in the core of TEMs was not prevented by the coating of PANI/ ILs-GO. The printing application of TEMs showed excellent adaptability to various flexible substrates with great 3D appearance. By incorporating a flame retardant agent into TEMs coated by PANI/ILs-GO, finally, these TEMs also demonstrated a great flame retardant ability. We expect that these TEM-coated PANI/ ILs-GO are likely to have the potential to improve the functional properties for various applications.

Keywords: Conductive polymers; Graphene oxide; Polydisperse chemical conversion; Screen-printing; Thermally expandable microspheres.