Competing hydrogen bonding produces mesoporous/macroporous carbons templated by a high-molecular-weight poly(caprolactone-b-ethylene oxide-b-caprolactone) triblock copolymer
Competing hydrogen bonding produces mesoporous/macroporous carbons templated by a high-molecular-weight poly(caprolactone-b-ethylene oxide-b-caprolactone) triblock copolymer
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DOI：
10.1007/s10965-020-02154-w
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发表时间：
2020-05-21
影响因子：
2.8
通讯作者：
Kuo, Shiao-Wei
中科院分区：
文献类型：
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作者：
Hung, Wei-Shih;Ahmed, Mahmoud M. M.;Kuo, Shiao-Wei
在这项研究中，我们开发了一种简单的策略，通过使用高分子量的三嵌段共聚物，PCL 440-b-PEO 454-b-PCL 440（CEC），作为一个单一的模板，本身通过简单的开环聚合制备从商业均聚物（HO-PEO 454-OH）作为双官能大分子引发剂和甲阶酚醛树脂型酚醛树脂作为碳源的大分子和介孔碳。我们采用差示扫描量热法，傅里叶变换红外（FTIR）光谱，和小角X射线散射研究的热行为，氢键，和自组装的酚醛/CEC共混物的纳米结构。我们获得了具有圆柱形或球形胶束结构的大孔（> 50 nm）和高表面积（>400 m（2）g（-1））的大孔和中孔碳，这是大多数酚羟基单元更喜欢与PEO片段而不是PCL片段相互作用（基于FTIR光谱分析）的结果。这些大孔/介孔碳显示出合理的CO2吸收和能量存储行为。
In this study we developed a simple strategy to synthesize macro- and mesoporous carbons by using a high-molecular-weight triblock copolymer, PCL440-b-PEO454-b-PCL440 (CEC), as a single template, itself prepared through simple ring-opening polymerization from a commercial homopolymer (HO-PEO454-OH) as the bifunctional macroinitiator and a resol-type phenolic resin as the carbon source. We employed differential scanning calorimetry, Fourier transform infrared (FTIR) spectroscopy, and small-angle X-ray scattering to investigate the thermal behavior, hydrogen bonding, and self-assembled nanostructures of the phenolic/CEC blends. We obtained macro- and mesoporous carbons possessing cylinder or spherical micelle structures with large pores (> 50 nm) and high surface areas (>400 m(2) g(-1)), the result of most of the phenolic OH units preferring to interact (based on FTIR spectral analyses) with the PEO segment rather than the PCL segment. These macro/mesoporous carbons displayed reasonable CO2 uptake and energy storage behavior.