A novel and efficient strategy to exfoliation of covalent organic frameworks and a significant advantage of covalent organic frameworks nanosheets as polymer nano-enhancer: High interface compatibility

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:539

Article

Mu, Xiaowei¹  Zhan, Jing²  Wang, Junling¹  Cai, Wei¹  Yuan, Bihe³  Song, Lei¹  Hu, Yuan¹ 

[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China

[2] Anhui Xinhua Univ, Sch Civil Engn & Environm Engn, Hefei 230088, Anhui, Peoples R China

[3] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China

关键词: COFs nanosheets;    High interface compatibility;    Thermal stability;    Mechanical performances;    Flame retardancy;    Hydrophobicity;   

DOI  :  10.1016/j.jcis.2018.12.103

来源: Elsevier

【 摘 要 】

To overcome the shortcomings of inefficiency in the preparation of covalent organic frameworks (COFs) nanosheets by ball milling, a gram-scale method to preparing COFs nanosheets with butyl lithium as the intercalation agent has been proposed. A significant advantage of COFs nanosheets that display good interface compatibility has been discovered through experiments. Due to their special organic crystalline structure and hydrogen bonding effects, COFs nanosheets without any modification show good interface compatibility, good dispersibility and enhancement in the mechanical properties of PVA matrix even at the loading as high as 9.6 wt%. Meanwhile, thermal, hydrophobic and flame retardant performances of PVA/COFs nanosheets nanocomposite have also been strengthened. This work should provide a guidance for the preparation of multifunctional nanocomposites with high loading. (C) 2019 Elsevier Inc. All rights reserved.

【 授权许可】

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