Electret Polyvinylidene Fluoride Nanofibers Hybridized by Polytetrafluoroethylene Nanoparticles for High-Efficiency Air Filtration
Electret Polyvinylidene Fluoride Nanofibers Hybridized by Polytetrafluoroethylene Nanoparticles for High-Efficiency Air Filtration
复制标题
聚四氟乙烯纳米颗粒杂化的驻极体聚偏二氟乙烯纳米纤维用于高效空气过滤
DOI：
10.1021/acsami.6b08262
复制
发表时间：
2016-09-14
影响因子：
9.5
通讯作者：
Ding, Bin
中科院分区：
文献类型：
--
作者：
Wang, Shan;Zhao, Xinglei;Ding, Bin
空气中的颗粒物污染已成为一个严重的环境问题，需要高过滤效率和低压降的驻极体纤维材料。然而，在使用中抑制电荷的耗散以确保纤维的稳定静电力以有效地吸附颗粒是极其重要的，也是具有挑战性的。在此，我们报告了新型驻极体纳米纤维膜具有众多的电荷和理想的电荷稳定性，使用聚偏氟乙烯（PVDF）作为基体聚合物和聚四氟乙烯纳米粒子（PTFE NPs）作为激发电荷增强剂，通过静电纺丝的原位充电技术。由于PTFE：NPs的加入和注入能量的优化，纤维膜的表面电位从0：42提高到3.63 kV，电荷衰减率从75.4%降低到17.5%，过滤效率的稳定性得到改善。通过开路热刺激放电和表面电位衰减的测量，证实了随着PTFE NP浓度和注入能量的增加，能级深度加深，极化偶极电荷增加。最终，所得纤维膜显示出99.972.%的高过滤效率，低压降为57 Pa，品质因数为0.14 Pa-1，长期使用性能上级。这种有趣材料的成功制备可能为PM2.5治理驻极体材料的设计和开发提供新的方法。
Airborne particulate matter (PM) pollution has become a severe environmental Concern calling for electret fibrous materials with high filtration efficiency and low pressure drop. However, restraining the dissipation of the electric charges in service to ensure the stabilized electrostatic force of the fibers for effectively: adsorbing particles is extremely important and :also challenging. Herein, we report novel electret nanofibrous membranes With numerous charges and desirable charge stability using polyvinylidene fluoride (PVDF) as the matrix polymer and polytetrafluoroethylene nanoparticles (PTFE NPs) as an inspiring charge enhancer through the in situ charging technology of electrospinning. Benefiting from the employment of PTFE:NPs and optimized injection energy, the fibrous membranes are endowed with elevated surface potential's from 0:42 to, 3.63 kV and reduced decrement of charges from 75.4 to 17.5%, which contribute to the ameliorative stability of filtration efficiency. Significantly, an electret mechanism is proposed, while deepened depth of the energy level and incremental polarized dipole charges With:increasing PTFE NP concentrations and injection energy have been confirmed through the measurement, of open-circuit thermally stimulated discharge and surface potential decay. Ultimately, the resultant fibrous membrane exhibited a high filtration efficiency of 99.972.%, a low pressure drop of 57 Pa a satisfactory quality factor of 0.14 Pa-1, and superior long-term service performance. The successful fabrication of such an intriguing material may provide a new approach for the design and development of electret materials for PM2.5 governance.