Facile and Green Strategy for Designing Ultralight, Flexible, and Multifunctional PVA Nanofiber‐Based Aerogels,Advanced Sustainable Systems

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Facile and Green Strategy for Designing Ultralight, Flexible, and Multifunctional PVA Nanofiber‐Based Aerogels
Advanced Sustainable Systems ( IF 6.5 ) Pub Date : 2020-02-14 , DOI: 10.1002/adsu.201900141
Jie Zhu ₁ , Shasha Lv _{2,

3} , Tonghui Yang _{2,

3} , Tao Huang ₁ , Hao Yu _{2,

3} , Qinghua Zhang _{2,

3} , Meifang Zhu ₁

Affiliation

Polymer nanofiber aerogels are highly flexible and elastic. However, their preparation in a simple, low‐cost, and environmentally friendly manner remains challenging. Herein, a green strategy for preparing an ultralight poly(vinyl alcohol) (PVA) nanofiber aerogel by electrospinning and freeze‐drying is reported. A simple thermal crosslinking method is used to make a mechanically robust material that can withstand up to 1000 times its own weight, i.e., no toxic crosslinking agents or organic solvents are used in any part of the fabrication process. The optimal aerogel has high porosity (99.1%), and consequently excellent thermal insulation performance and low thermal conductivity (0.033 W m⁻¹ K⁻¹). Furthermore, the flexibility and hierarchical micronano structure of the aerogel qualify it as a promising candidate for air filters and intelligent wearable sensors.

中文翻译：

设计超轻，灵活和多功能的PVA纳米纤维气凝胶的简便，绿色策略

聚合物纳米纤维气凝胶具有高度的柔韧性和弹性。但是，以简单，低成本和环境友好的方式进行制备仍然具有挑战性。本文报道了一种通过静电纺丝和冷冻干燥制备超轻型聚乙烯醇（PVA）纳米纤维气凝胶的绿色策略。一种简单的热交联方法用于制造机械强度高的材料，该材料可承受其自身重量的1000倍，即在制造过程的任何部分均不使用有毒的交联剂或有机溶剂。最佳的气凝胶具有高孔隙率（99.1％），因此具有出色的隔热性能和低导热率（0.033 W m ^-1 K ^-1）。此外，气凝胶的灵活性和分级的微纳米结构使其成为空气过滤器和智能可穿戴传感器的有希望的候选者。

更新日期：2020-04-09

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