Department of Chemical Engineering, Qatar University, PO Box 2713, Doha, Qatar.
Adv Mater. 2011 Jul 12;23(26):2887-903. doi: 10.1002/adma.201100283. Epub 2011 May 24.
An overview on the preparation and properties of resorcinol-formaldehyde (RF) organic and carbon gels reveals the fascinating and remarkably flexible properties of RF carbon and organic gels and how these properties are related to the synthesis and processing conditions. The structural properties can be easily tailored by rigidly controlling such conditions. However, slight variations in some conditions may cause drastic variations in the structural characteristics, and hence properties. Therefore, the effects of different conditions must be well-understood before attempting to tailor organic or carbon gels to specific applications. The most important factors that affect the properties of an organic gel are the precursor concentrations, the catalyst type and concentration, the time and temperature of curing, and the drying method. In addition to these factors, characteristics of activated carbon gels also depend on the pyrolysis temperature and the activation method. These conditions impact the structural and performance characteristics significantly.
综述了间苯二酚-甲醛（RF）有机和碳凝胶的制备和性能，揭示了 RF 碳和有机凝胶的迷人且非常灵活的特性，以及这些特性如何与合成和加工条件相关。通过严格控制这些条件，可以轻松地调整结构特性。然而，某些条件的微小变化可能会导致结构特征的剧烈变化，从而导致性能的变化。因此，在尝试将有机或碳凝胶定制到特定应用之前，必须充分了解不同条件的影响。影响有机凝胶性能的最重要因素是前体浓度、催化剂类型和浓度、固化时间和温度以及干燥方法。除了这些因素之外，活性炭凝胶的特性还取决于热解温度和活化方法。这些条件会对结构和性能特性产生重大影响。
