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

被引:110
作者
Cao, Cheng-Fei [1 ]
Wang, Peng-Huan [1 ]
Zhang, Jian-Wang [1 ]
Guo, Kun-Yu [1 ]
Li, Yang [1 ]
Xia, Qiao-Qi [1 ]
Zhang, Guo-Dong [1 ]
Zhao, Li [1 ]
Chen, Heng [2 ]
Wang, Luobin [3 ]
Gao, Jie-Feng [4 ]
Song, Pingan [5 ]
Tang, Long-Cheng [1 ]
机构
[1] Hangzhou Normal Univ, Minist Educ, Key Lab Organosilicon Chem & Mat Technol, Hangzhou 311121, Peoples R China
[2] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Peoples R China
[3] China Acad Engn Phys, Inst Syst Engn, Mianyang 621999, Sichuan, Peoples R China
[4] Yangzhou Univ, Coll Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China
[5] Univ Southern Queensland, Ctr Future Mat, Toowoomba, Qld 4350, Australia
关键词
Polydimethylsiloxane foam; Graphene derivatives; In-situ surface-assembly; Mechanical and thermal properties; Synergetic flame resistance; REINFORCED SILICONE FOAM; FUNCTIONALIZED GRAPHENE; EPOXY COMPOSITES; OXIDE; FABRICATION; SPONGE; RUBBER; PDMS; RESISTANCE; NETWORK;
D O I
10.1016/j.cej.2020.124724
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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, similar to 31% and similar to 40% reduction in peak heat release rate and similar to 80% and similar to 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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页数:13
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