Self-healing polymers have been extensively studied, however, challenges remain in cooperating processability and functionality for practical applications. Here, we present a facile method to fabricate a nanocomposite by constructing intercoupling short hydrogen-bonding clusters between polyborosiloxane (PBS) and l-cystine modified MMT nanosheets (LMMT) to produce both weak entanglement and interfacial interaction. At ambient conditions, the resultant nanocomposite simultaneously achieves preferable rheological dynamics, short self-healing time and higher self-healing efficiency (∼99.48% in 10 min), remarkable barrier properties (water vapor permeability ∼4.74 × 10⁻¹¹ g m/(m²·s·pa)) even after repeated damage-healing cycles, which overturns the previous understanding of conventional self-healing composites where self-healing, shapeability and high-barrier performances are mutually exclusive. Moreover, such nanostructure characterize enables the self-sealing ability applying in the substance-preserving function. This work provides fundamental insight for designing and developing multi-function materials for self-sealing packaging application.

自修复聚合物已被广泛研究，然而，在实际应用的协同加工性和功能性方面仍然存在挑战。在这里，我们提出了一种通过在聚硼硅氧烷（PBS）和l-胱氨酸修饰的MMT纳米片（LMMT）之间构建相互耦合的短氢键簇以产生弱缠结和界面相互作用来制造纳米复合材料的简便方法。在环境条件下，所得纳米复合材料同时实现了较好的流变动力学、较短的自愈时间和较高的自愈效率（10 min 内~99.48%）、显着的阻隔性能（水蒸气渗透率~4.74 × 10 ^-11  g m/(m ²·s·pa)) 甚至在重复的损伤修复循环之后，这颠覆了之前对传统自修复复合材料的理解，其中自修复、可成形性和高阻隔性能是相互排斥的。此外，这种纳米结构特征使自密封能力能够应用于物质保存功能。这项工作为设计和开发用于自密封包装应用的多功能材料提供了基本的见解。