An organogel based on natural urushiol with a high mechanical strength was prepared in the presence of Fe³⁺ ions at 30 °C. Urushiol obtained from lacquer sap of the lacquer tree, which is a mixture of catechol derivatives having long alkyl side chains, was used as a monomer. The urushi organogels were formed through the polymerization of urushiol and coordination bonds in the presence of Fe³⁺ ions in the urushiol solution. The Fe³⁺ ions acted as catalysts for the polymerization of urushiol, which solves the problem of the bio-enzyme's activity (laccase) being uncontrollable in lacquer sap. The fabrication and properties of urushi organogels with different concentrations of Fe³⁺ ions were investigated. Coordination bonds between Fe³⁺ ion and urushiol acted as additional crosslinking sites to form a multi-network structure, which was confirmed by Raman spectroscopy. The formation of the coordination bonds improved the mechanical strength of the chemically crosslinked urushi organogel, in addition to the entanglement of the long alkyl side chains of the urushiol. A highly stretchable and durable urushi film was obtained owing to the multi-network system of the urushi organogel, which expands the applicability of environmentally friendly natural urushi.

在30°C的Fe ³⁺离子存在下，制备了具有高机械强度的基于天然漆酚的有机凝胶。由漆树的漆汁获得的漆酚（其为具有长烷基侧链的邻苯二酚衍生物的混合物）用作单体。在漆酚溶液中存在Fe ³⁺离子时，漆酚和配位键的聚合形成了漆酚有机凝胶。Fe ³⁺离子作为漆酚的聚合催化剂，解决了漆液中生物酶的活性（漆酶）无法控制的问题。研究了具有不同浓度的Fe ³⁺离子的urushi有机凝胶的制备和性能。铁之间的配位键³⁺离子和漆酚作为额外的交联位点形成多网络结构，这已通过拉曼光谱法证实。除了纠缠了漆酚的长烷基侧链以外，配位键的形成还改善了化学交联的漆树有机凝胶的机械强度。由于urushi有机凝胶的多网络系统，获得了高度可拉伸和耐用的urushi膜，从而扩展了环保型天然urushi的适用性。