One-step and green synthesis of lightweight, mechanically flexible and flame-retardant polydimethylsiloxane foam nanocomposites via surface-assembling ultralow content of graphene derivative

Cao, Cheng-Fei and Wang, Peng-Huan and Zhang, Jian-Wang and Guo, Kun-Yu and Li, Yan and Xia, Qiao-Qi and Zhang, Guo-Dong and Zhao, Li and Chen, Heng and Wang, Luobin and Gao, Jie-Feng and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X and Tang, Long-Cheng (2020) One-step and green synthesis of lightweight, mechanically flexible and flame-retardant polydimethylsiloxane foam nanocomposites via surface-assembling ultralow content of graphene derivative. Chemical Engineering Journal, 393:124724. pp. 1-13. ISSN 1385-8947


Abstract

Lightweight polydimethylsiloxane (PDMS) foam materials with outstanding mechanical flexibility and high-temperature stability as well as excellent flame resistance are attractive for various potential applications. However, incorporation of conventional flame retardants needs high filling content and usually induces compromise of other important performance, limiting their practical application significantly. In addition, the problems of complicated procedure and environmental pollution of the traditional processing are imperative but challenging. Here, we report a facile and green in-situ surface-assembly approach to construct two types of graphene oxide (GO) derivative (i.e. sheet and nanoribbon) coatings bonded onto the PDMS foam surface and investigate their discrepancies in thermal and mechanical and flame-retardant properties of the two nanocomposite systems. Interestingly, surface-assembling ultralow loading (≤0.10 wt%) of two GO derivatives can produce significant improvements in thermal stability and flame retardancy of the PDMS foam without affecting its density and elasticity. Typically, ~31% and ~40% reduction in peak heat release rate and ~80% and ~95% improvement in total smoke release were achieved for 0.10 wt% GONR and GO sheet, respectively. Based on the burnt surface zone observation and analysis, the synergistic flame-retardant mechanisms and their differences between the PDMS molecules and two GO derivatives were discussed and clarified. This work provides a new understanding for design and development of green and large-scale fabrication of flame retardant PDMS foam nanocomposite materials.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 01 Feb 2021 00:36
Last Modified: 04 Feb 2021 04:55
Uncontrolled Keywords: Polydimethylsiloxane foam; Graphene derivatives; In-situ surface-assembly; Mechanical and thermal properties; Synergetic flame resistance
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
Identification Number or DOI: https://doi.org/10.1016/j.cej.2020.124724
URI: http://eprints.usq.edu.au/id/eprint/40975

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