Fabrication of Hierarchically Porous CuBTC@PA-PEI Composite for High-Efficiency Elimination of Cyanogen Chloride

Cyanogen chloride (CNCl) is highly toxic and volatile, and it is difficult to effectively remove via porous substances such as activated carbon due to the weak interaction between CNCl and the adsorbent surface. Developing a highly effective elimination material against CNCl is of great importance i...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2023-03, Vol.28 (6), p.2440
Main Authors: Yang, Xuanlin, Lan, Liang, Zheng, Chao, Kang, Kai, Song, Hua, Zhou, Shuyuan, Bai, Shupei
Format: Article
Language:English
Subjects:
Acrylic resins
Activated carbon
Adsorbents
Adsorption
Amino groups
Catalysis
Chloride
Chlorides
Composite materials
CuBTC/polyacrylate composite
Cyanogen
cyanogen chloride
Emulsion polymerization
Fabrication
Metal ions
Metal-organic frameworks
Nitriles
Polyacrylate
Polyethyleneimine
Polymers
Pore size
Porous materials
Porous media
Self-assembly
stepwise impregnation layer-by-layer growth
surface modification
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Summary:Cyanogen chloride (CNCl) is highly toxic and volatile, and it is difficult to effectively remove via porous substances such as activated carbon due to the weak interaction between CNCl and the adsorbent surface. Developing a highly effective elimination material against CNCl is of great importance in military chemical protection. In this work, a new metal-organic framework (MOF) CuBTC@PA-PEI (polyacrylate-polyethyleneimine) composite was prepared and exhibited excellent CNCl elimination performance in the breakthrough tests. PEI was used for the functionalization of PA with amino groups, which is beneficial to anchor with metal ions of MOF. Afterward, the growth of MOF occurred on the surface and in the pores of the matrix by molecular self-assembly via our newly proposed stepwise impregnation layer-by-layer growth method. Breakthrough tests were performed to evaluate the elimination performance of the composites against CNCl. Compared with the pristine CuBTC powder, the CuBTC@PA-PEI composite exhibited better adsorption capacity and a longer breakthrough time. By compounding with the PA matrix, a hierarchically porous structure of CuBTC@PA-PEI composite was constructed, which provides a solution to the mass transfer problem of pure microporous MOF materials. It also solves the problems of MOF molding and lays a foundation for the practical application of MOF.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules28062440