Polymerization of Alkylsilanes on ZIF-8 to Hierarchical Siloxane Microspheres and MicroflowersReportar como inadecuado


Polymerization of Alkylsilanes on ZIF-8 to Hierarchical Siloxane Microspheres and Microflowers


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Yunnan Provincial Collaborative Innovation Center of Green Chemistry for Lignite Energy, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, The Universities’ Center for Photocatalytic Treatment of Pollutants in Yunnan Province, School of Energy, School of Chemical Sciences and Technology, Yunnan University, Kunming 650091, China





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Academic Editor: Carl Redshaw

Abstract The use of metal-organic frameworks MOFs in the polymerization field remains comparatively rare up to now, let alone studies on the fabrication of polymer microstructures through a MOFs-catalyzed assembly process. Zeolitic imidazolate framework-8 ZIF-8, a well-known MOF for its chemical and thermal stabilities, was used to induce a polymerization reaction of saturated alkylsilanes for the first time. The reaction temperature was found to be critical for morphology control of the polymerized ZIF-siloxane composites. The polymerization of alkylsilanes by ZIF-8 at room temperature resulted in siloxane microspheres while rose petal-like microstructures were obtained at higher temperature. The effects of the reaction time on the structures of the polymerization products were also investigated and the polymerization reaction process was proposed. This work expands the field of MOFs’ applications and develops a reasonable method for the multidimensional assembly of MOFs building blocks into required structures or platforms for designing new kinds of hierarchical morphologies, which to our knowledge has not been previously investigated. View Full-Text

Keywords: ZIF-8; composite materials; polymerization of alkylsilane; siloxane microflowers; fabrication of MOF ZIF-8; composite materials; polymerization of alkylsilane; siloxane microflowers; fabrication of MOF





Autor: Lin Yang, Congjia Xie, Yizhou Li, Lei Guo, Minfang Nie, Jinping Zhang, Zhiying Yan, Jiaqiang Wang * and Wei Wang *

Fuente: http://mdpi.com/



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