Fiber has been considered as an ideal material for virus insulation due to the readily available electrostatic adsorption. However, restricted by the electrostatic attenuation and filtration performance decline, their long-lasting applications are unable to satisfy the requirements of medical protective equipment for major medical and health emergencies such as global epidemics, which results in both a waste of resources and environmental pollution. We overcame these issues by constructing a fiber-in-tube structure, achieving the robust reusability of fibrous membranes. Core fibers within the hollow could form generators with tube walls of shell fibers to provide persistent, renewable static electricity via piezoelectricity and triboelectricity. The PM_0.3 insulation efficiency achieved 98% even after 72 h of humidity and heat aging, through beating and acoustic waves, which is greatly improved compared with that of traditional nonwoven fabric (∼10% insulation). A mask spun with our fiber also has a low breathing resistance (differential pressure <24.4 Pa/cm²). We offer an approach to enrich multifunctional fiber for developing electrifiable filters, which make the fiber-in-tube filtration membrane able to durably maintain a higher level of protective performance to reduce the replacement and provide a new train of thought for the preparation of other high-performance protective products.

中文翻译：

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用于病毒过滤的管内纤维带电结构 通过振动/声音自生静电

由于易于实现静电吸附，纤维被认为是病毒隔离的理想材料。但受静电衰减和过滤性能下降的制约，其长期应用无法满足全球疫情等重大医疗卫生突发事件对医疗防护用品的需求，造成资源浪费和环境污染。我们通过构建管内纤维结构克服了这些问题，实现了纤维膜的稳健可重复使用性。空心内的芯纤维可以与壳纤维的管壁形成发电机，通过压电和摩擦电提供持久的、可再生的静电。通过打浆和声波的方式， PM _0.3的隔热效率即使在湿热老化72小时后仍能达到98%，与传统无纺布（〜10%隔热）相比有很大提高。用我们的纤维纺制的口罩还具有较低的呼吸阻力（压差<24.4 Pa/cm ²）。我们为开发带电过滤器提供了丰富多功能纤维的方法，使管内纤维过滤膜能够持久保持较高水平的防护性能，减少更换，为制备其他高性能过滤膜提供了新的思路。 -高性能防护产品。