Supramolecular wrapped sandwich like SW-Si3N4 hybrid sheets as advanced filler toward reducing fire risks and enhancing thermal conductivity of thermoplastic polyurethanes

Liang Cheng; Jingwen Wang; Shuilai Qiu; Junling Wang; Yifan Zhou; Longfei Han; Bin Zou; Zhoumei Xu; Yuan Hu; Chao Ma

doi:10.1016/j.jcis.2021.06.153

Supramolecular wrapped sandwich like SW-Si₃N₄ hybrid sheets as advanced filler toward reducing fire risks and enhancing thermal conductivity of thermoplastic polyurethanes

J Colloid Interface Sci. 2021 Dec:603:844-855. doi: 10.1016/j.jcis.2021.06.153. Epub 2021 Jun 29.

Authors

Liang Cheng¹, Jingwen Wang¹, Shuilai Qiu², Junling Wang³, Yifan Zhou³, Longfei Han¹, Bin Zou¹, Zhoumei Xu¹, Yuan Hu¹, Chao Ma⁴

Affiliations

¹ State Key Laboratory of Fire Science, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China.
² State Key Laboratory of Fire Science, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China. Electronic address: shuilai@ustc.edu.cn.
³ Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, College of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
⁴ State Key Laboratory of Fire Science, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China. Electronic address: mcsky@ustc.edu.cn.

PMID: 34237602
DOI: 10.1016/j.jcis.2021.06.153

Abstract

A sandwich-like melamine/phytic acid/silicon nitride hybrid (SW-Si₃N₄) sheets were prepared by supramolecular wrapping as the hybrid flame retardants for thermoplastic polyurethane (TPU). The introduction of Si₃N₄ sheets as a template could not only induce the generation of two-dimensional phytic/melamine (PAMA) capping layers, but also produce the synergistic flame-retardant effect on TPU composites. Cone test showed that heat release rate (HRR), smoke production rate (SPR) and total smoke production (TSP) values of TPU were decreased obviously by adding SW-Si₃N₄. TG-IR test indicated the dramatic inhibition of aromatic compound, hydrocarbons, CO and HCN release. Besides, the thermal conductivity of composites was obviously improved by adding SW-Si₃N₄. This work may provide better reference for developing multi-functional TPU composites for diverse application.

Keywords: Flame retardant; Silicon nitride nanosheet; Thermal conductivity; Thermoplastic polyurethane; Toxic gas.

MeSH terms

Flame Retardants*
Hot Temperature
Polyurethanes*
Thermal Conductivity

Substances

Flame Retardants
Polyurethanes