Insight into the carbon nanotube agglomeration deteriorated fire safety of epoxy
文献类型：期刊论文
| 作者 | Wang, Qi1,2; Mao, Yangjiahua1; Dong, Yujie1; Yang, Xuezheng3; Zhong, Bingwei4; Liu, Yaqing1 |
| 刊名 | DIAMOND AND RELATED MATERIALS
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 140页码:9 |
| 关键词 | Nano-candlewick effect Carbon nanotube Epoxy Fire safety |
| ISSN号 | 0925-9635 |
| DOI | 10.1016/j.diamond.2023.110443 |
| 通讯作者 | Zhong, Bingwei(20140040@zafu.edu.cn) ; Liu, Yaqing(lyq@nuc.edu.cn) |
| 英文摘要 | Carbon nanotube (CNT)/epoxy composite is a star lightweight structure material. However, the reason why welldispersed CNTs retard the combustion of epoxy while CNT agglomerations always accelerate it instead seems still confusing, which severely limits the further understanding and design of the high-performance CNT/epoxy composite. Herein, with CNT agglomerations inside, 4coCNT/epoxy composite and 2coCNT0.5/epoxy composite were prepared to reveal the truth of the dramatically worsened flame retarding performances compared with their expected values. The void-rich CNT agglomerations were proved to be qualified candlewick-like fillers after directly observing the formations of micron-diameter fiber-like agglomerations by scanning electron microscope (SEM) and X-ray computed tomography (XCT); verifying the ability of CNT agglomerations to allow the epoxy melt to wet, spread, and flow on their surface. The thermogravimetric analysis (TG) and the limited oxygen index (LOI) results suggested that fire is necessary for the CNT agglomeration to worsen the thermostability of composites. With the presence of the liquid-phase combustible epoxy melt in the fire captured by a high-definition camera, all the requirements to induce the candlewick effect were satisfied. Ruling out a popular explanation that the agglomerated CNTs promote polymers' inflammability by cracking chars created during the combustion, a similar but distinct candlewick effect was then proposed and specially defined as "nano-candlewick effect" in the present study. The nano-candlewick effect defeated the flame-retarding free radical scavenging effect of the dangling bonds from coCNT and coCNT0.5, and further worsened the flame retardancy of the epoxy matrix. The detailed working mechanism of the nano-candlewick effect was described. The mechanism is supposed to be appropriate for polymer nanocomposites with candlewick-like fillers inside, and account for the dramatically accelerated combustion. |
| 资助项目 | Shanxi Province 1331 Project Key Innovation Team of Polymeric Functional New Materials and Shanxi Province Innovative Disciplinary Group of New Materials Industry |
| WOS研究方向 | Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001149329200001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | Shanxi Province 1331 Project Key Innovation Team of Polymeric Functional New Materials and Shanxi Province Innovative Disciplinary Group of New Materials Industry |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhong, Bingwei; Liu, Yaqing |
| 作者单位 | 1.North Univ China, Res Ctr Engn Technol Polymer Composites Shanxi Pro, Sch Mat Sci & Engn, Shanxi Key Lab Nano Funct Composite Mat, Taiyuan 030051, Shanxi, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 3.Baotou Res Inst Rare Earths, Baotou 014020, Inner Mongolia, Peoples R China 4.Zhejiang A&F Univ, Jiyang Coll, Zhuji 311800, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Qi,Mao, Yangjiahua,Dong, Yujie,et al. Insight into the carbon nanotube agglomeration deteriorated fire safety of epoxy[J]. DIAMOND AND RELATED MATERIALS,2023,140:9. |
| APA | Wang, Qi,Mao, Yangjiahua,Dong, Yujie,Yang, Xuezheng,Zhong, Bingwei,&Liu, Yaqing.(2023).Insight into the carbon nanotube agglomeration deteriorated fire safety of epoxy.DIAMOND AND RELATED MATERIALS,140,9. |
| MLA | Wang, Qi,et al."Insight into the carbon nanotube agglomeration deteriorated fire safety of epoxy".DIAMOND AND RELATED MATERIALS 140(2023):9. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。