Green Synthesis of Hierarchical Metal-Organic Framework/Wood Functional Composites with Superior Mechanical Properties
Green Synthesis of Hierarchical Metal-Organic Framework/Wood Functional Composites with Superior Mechanical Properties
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DOI：
10.1002/advs.201902897
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发表时间：
2020-02-06
期刊：
影响因子：
15.1
通讯作者：
Keplinger, Tobias
中科院分区：
文献类型：
--
作者：
Tu, Kunkun;Puertolas, Begona;Keplinger, Tobias
将金属有机骨架（MOF）与大孔材料共轭的具有分级结构的先进复合材料的应用通常因其较差的机械性能而受到限制。在此，介绍了一种在木材基材内原位生长 MOF 纳米晶体的通用绿色合成方法。不同类型 MOF 的成核位点很容易通过氢氧化钠处理产生，这被证明广泛适用于不同的木材种类。由此产生的 MOF/木材复合材料具有分层孔隙率，比天然木材大 130 倍。 CO2 吸附能力的评估表明 MOF 负载的有效利用以及与纯 MOF 相似的吸附能力。压缩和拉伸测试显示出优异的机械性能，超过了聚合物基材所获得的机械性能。该功能化策略为多功能 MOF/木材衍生复合材料的制造提供了一个稳定、可持续和可扩展的平台，在环境和能源相关领域具有潜在的应用。
The applicability of advanced composite materials with hierarchical structure that conjugate metal-organic frameworks (MOFs) with macroporous materials is commonly limited by their inferior mechanical properties. Here, a universal green synthesis method for the in situ growth of MOF nanocrystals within wood substrates is introduced. Nucleation sites for different types of MOFs are readily created by a sodium hydroxide treatment, which is demonstrated to be broadly applicable to different wood species. The resulting MOF/wood composite exhibits hierarchical porosity with 130 times larger specific surface area compared to native wood. Assessment of the CO2 adsorption capacity demonstrates the efficient utilization of the MOF loading along with similar adsorption ability to that of pure MOF. Compression and tensile tests reveal superior mechanical properties, which surpass those obtained for polymer substrates. The functionalization strategy offers a stable, sustainable, and scalable platform for the fabrication of multifunctional MOF/wood-derived composites with potential applications in environmental- and energy-related fields.