Poisons and poisonous weapons in armed conflict, especially chemical warfare agents (CWAs), pose serious threats to global security. Porous materials have recently been regarded as promising candidates to defend personnel in a CWA-contaminated environment, but challenges remain for integrating these materials into protective garments without sacrificing the intrinsic flexibility of fibers. Here, we report a rigid–flexible coupling hypercross-linking methodology to create flexible sponge-like nanofibers featuring hierarchical radial gradient porous nanoarchitectures, in which the inner structure is a mesoporous multichambered network, and the outer structure is a dense domain with a microporous network structure. Experimental and computational evidence supports the contention that sponge nanofibers with distinctive pore topology and robust bendability can be designed by manipulating the flexibility of building blocks. The resulting heterogeneous nanofibers exhibit integrated properties of spatially selective superstructures, abundant micropores, interconnected mesopores, a high surface area (579 m² g^–1), remarkable flexibility, and exceptional CWA affinity, which are extraordinarily effective for adsorptive performance (498 mg g^–1). The successful synthesis of these materials might inspire the development of chemical protective materials in an efficient, self-standing, and structurally adaptive form.

中文翻译：

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分子笼介导的径向梯度多孔海绵纳米纤维用于芥子气模拟物的选择性吸附

武装冲突中的毒药和有毒武器，尤其是化学战剂（CWA），对全球安全构成严重威胁。多孔材料最近被认为是在受 CWA 污染的环境中保护人员的有希望的候选材料，但将这些材料集成到防护服中而不牺牲纤维固有的柔韧性仍然存在挑战。在这里，我们报告了一种刚柔耦合超交联方法来创建具有分层径向梯度多孔纳米结构的柔性海绵状纳米纤维，其中内部结构是介孔多室网络，外部结构是具有微孔网络的致密域结构体。实验和计算证据支持这样的论点，即可以通过操纵积木的柔韧性来设计具有独特孔隙拓扑结构和强大弯曲性的海绵纳米纤维。由此产生的异质纳米纤维表现出空间选择性超结构、丰富的微孔、互连的介孔、高表面积（579 m² g ^–1 )、卓越的柔韧性和卓越的 CWA 亲和力，对吸附性能非常有效 (498 mg g ^–1 )。这些材料的成功合成可能会以高效、自立和结构适应性的形式激发化学保护材料的开发。