Leaf vein-inspired engineering of MXene@SrSn(OH)6 nanorods towards super-tough elastomer nanocomposites with outstanding fire safety. (1st January 2022)

• Record Type: Journal Article
• Authors: Lu, Jingyi; Jia, Pengfei; Liao, Can; Xu, Zhoumei; Chu, Fukai; Zhou, Mutian; Yu, Bin; Wang, Bibo; Song, Lei
• Is Part Of: Composites. Number 228(2022)
• Publication Date: 2022-01-01
• Subjects: Leaf vein-inspired -- Thermoplastic polyurethane -- Fire safety -- Mechanical reinforcement -- MXene; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2021.109425
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: The progress of super-robust, high ductile polymeric nanocomposite with superior safety have been caught increasing eyesight for the application in electronic products. In this article, strontium hydroxystannate (SSO) nanorods were in-situ fabricated on the surface of titanium carbide (Ti3 C2 Tx ) MXene nanosheets (MSSO) for improving fire safety and mechanical property of thermoplastic polyurethane (TPU) to further applications of portable devices. With biomimetic method, the tensile robustness and toughness of TPU-2.0MSSO was enhanced by 46% and 126%, respectively. In addition, the TPU-MSSO nanocomposites performed leaf vein-inspired hierarchical structure during the stretching behavior, resulting 55% enhancement of elongation at break. Furthermore, the fire safety was systematically evaluated, and the peak heat release rate (pHRR) decreased by 37.31%. Above all, hazardous pyrolysis products of TPU during the combustion were also efficiently reduced, especially the generation of carbon oxide (CO) and carbon dioxide (CO2 ) were decreased by 96.04% and 89.85% when the additive of MSSO was only 2 wt%. As a result, ternary catalytic effect and labyrinth structure improved the safety of TPU in modern electronic products. Hence, this leaf vein-inspired TPU-MSSO nanocomposites not only exhibit superior toughness but also reinforce fire safety while facing thermal runaway, which was significant to destroy the formation of thermal disaster chain and maintain further applications of additional products for portable devices, and package materials for flexible electronics. Graphical abstract: Image 1 Highlights: Leaf vein-inspired nanostructure was prepared via SSO nanorods in-situ growing on Ti3 C2 Tx . TPU-2.0MSSO nanocomposite shows up exceeding improvement of toughness reaching 126%. The pHRR of TPU-2.0MSSO was reduced by 37.31% with a low heat release. The production of CO and CO2 were reduced by 96.04% and 89.85% using 2 wt% MSSO. MSSO offers a method for enhancing toughness and safety for flexible electronics.