Hydrophobic, Pore‐Tunable Polyimide/Polyvinylidene Fluoride Composite Aerogels for Effective Airborne Particle Filtration,Macromolecular Materials and Engineering

当前位置： X-MOL 学术 › Macromol. Mater. Eng. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Hydrophobic, Pore‐Tunable Polyimide/Polyvinylidene Fluoride Composite Aerogels for Effective Airborne Particle Filtration
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-07-08 , DOI: 10.1002/mame.202000129
Shiya Qiao ₁ , Hao Zhang ₂ , Shuai Kang ₁ , Jiayou Quan ₁ , Zuming Hu _{1,

3} , Junrong Yu _{1,

3} , Yan Wang ₁ , Jing Zhu ₃

Affiliation

Polyimide (PI) aerogels have great potential as filter materials, owing to their unique porous structure and excellent thermodynamic properties. In this work, polyvinylidene fluoride (PVDF) is introduced into the 3D network structure of crosslinked PI by phase separation to prepare PI/PVDF hybrid aerogels. By adding different amounts of PVDF, effective control of the aerogel porous structure is achieved, as a result, the air permeability of the hybrid aerogel is significantly improved while still achieving a filtration efficiency of airborne particulates of more than 99.8%. PVDF is aggregated and dispersed on the surface or inside of the aerogel in the form of nanoparticles, which effectively increases the hydrophobicity of the material. The contact angle of the prepared PI hybrid aerogel is ≈150°, and the water absorption is as low as 2.2%, which enables the aerogel to maintain structural stability in humid environments. In addition, the aerogel exhibits good adsorption effects on organic solvents.

中文翻译：

疏水性可调的聚酰亚胺/聚偏二氟乙烯复合气凝胶，可有效过滤机载颗粒

聚酰亚胺（PI）气凝胶由于其独特的多孔结构和出色的热力学特性，具有作为过滤材料的巨大潜力。在这项工作中，通过相分离将聚偏二氟乙烯（PVDF）引入到交联PI的3D网络结构中，以制备PI / PVDF混合气凝胶。通过添加不同量的PVDF，可以有效地控制气凝胶多孔结构，结果，显着提高了混合气凝胶的透气性，同时仍实现了大于99.8％的气载颗粒过滤效率。PVDF以纳米颗粒的形式聚集并分散在气凝胶的表面或内部，从而有效地增加了材料的疏水性。制备的PI混合气凝胶的接触角约为150°，吸水率低至2.2％，这使气凝胶能够在潮湿环境中保持结构稳定性。另外，气凝胶对有机溶剂表现出良好的吸附效果。

更新日期：2020-08-12

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11