A Family of Highly Ordered Mesoporous Polymer Resin and Carbon Structures from Organic-Organic Self-Assembly
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- 作者：Yan Meng ; Dong Gu ; Fuqiang Zhang ; Yifeng Shi ; Liang Cheng ; Dan Feng ; Zhangxiong Wu ; Zhenxia Chen ; Ying Wan ; Andreas Stein ; Dongyuan Zhao
- 刊名：Chemistry of Materials
- 出版年：2006
- 出版时间：September 5, 2006
- 年：2006
- 卷：18
- 期：18
- 页码：4447 - 4464
- 全文大小：801K
- 年卷期：v.18,no.18(September 5, 2006)
- ISSN：1520-5002
文摘
The syntheses of a family of highly ordered mesoporous polymers and carbon frameworks from organic-organic assembly of triblock copolymers with soluble, low-molecular-weight phenolic resin precursors(resols) by an evaporation induced self-assembly strategy have been reported in detail. The family membersinclude two-dimensional hexagonal (space group, p6m), three-dimensional bicontinuous (Ia
d), body-centered cubic (Imm), and lamellar mesostructures, which are controlled by simply adjusting the ratioof phenol/template or poly(ethylene oxide)/poly(propylene oxide) in the templates. A five-step mechanismfrom organic-organic assembly has been demonstrated. Cubic FDU-14 with a gyroidal mesostructureof polymer resin or carbon has been synthesized for the first time by using the copolymer Pluronic P123as a template in a relatively narrow range. Upon calcination at 350 
C, the templates should be removedto obtain mesoporous polymers, and further heating at above a critical temperature of 600 C transformsthe mesoporous polymers to the homologous carbon frameworks. The mesoporous polymer resin andcarbon product materials exhibit ordered structures, high surface areas, (670-1490 m2/g), large porevolumes (0.65-0.85 cm3/g), and uniform, large pore sizes (7.0-3.9 nm), as well as very thick porewalls (6-8 nm). The carbon open frameworks with covalently bonded constructions and thick pore wallsexhibit high thermal stability (>1400 C). Our results show that the feed gas used during the calcinationhas a great influence on the porosity of the products. The presence of a small amount of oxygen facilitatesthe large pore sizes and high surface areas of mesoporous materials with different mesostructures. Anextraction method employing sulfuric acid can also decompose the template from hexagonal mesostructuredpolymers with little framework shrinkage. Preliminary studies of the mechanical and electrochemicalproperties of mesoporous carbon molecular sieves are also presented.
d), body-centered cubic (Imm), and lamellar mesostructures, which are controlled by simply adjusting the ratioof phenol/template or poly(ethylene oxide)/poly(propylene oxide) in the templates. A five-step mechanismfrom organic-organic assembly has been demonstrated. Cubic FDU-14 with a gyroidal mesostructureof polymer resin or carbon has been synthesized for the first time by using the copolymer Pluronic P123as a template in a relatively narrow range. Upon calcination at 350 C, the templates should be removedto obtain mesoporous polymers, and further heating at above a critical temperature of 600 C transformsthe mesoporous polymers to the homologous carbon frameworks. The mesoporous polymer resin andcarbon product materials exhibit ordered structures, high surface areas, (670-1490 m2/g), large porevolumes (0.65-0.85 cm3/g), and uniform, large pore sizes (7.0-3.9 nm), as well as very thick porewalls (6-8 nm). The carbon open frameworks with covalently bonded constructions and thick pore wallsexhibit high thermal stability (>1400 C). Our results show that the feed gas used during the calcinationhas a great influence on the porosity of the products. The presence of a small amount of oxygen facilitatesthe large pore sizes and high surface areas of mesoporous materials with different mesostructures. Anextraction method employing sulfuric acid can also decompose the template from hexagonal mesostructuredpolymers with little framework shrinkage. Preliminary studies of the mechanical and electrochemicalproperties of mesoporous carbon molecular sieves are also presented.