| 纺锤状纤维结构的设计及其PM2.5过滤性能研究 |
| |
| 作者姓名： | 黄宗旺 廖娟 张毅 袁福来 刘赛男 欧阳静 杨华明 |
| |
| 作者单位： | Department of Inorganic Materials;Hunan Key Lab of Mineral Materials and Application;Health Management Center |
| |
| 基金项目： | supported by the National Natural Science Foundation of China (21878341,51804343,41572036 and 51225403);the Natural Science Foundation of Hunan Province(2018JJ3670);the Key R&D Program of Hunan Province(2017GK2251)。 |
| |
| 摘 要： | 城市雾霾,特别是其中的PM2.5颗粒(当量直径≤2.5μm),因其自身危害及其携带的病原体对公共健康具有严重威胁而被人们广泛关注.静电纺丝纳米纤维作为空气过滤膜实现PM2.5高效捕获是国内外研究热点,但现有的纺丝滤膜仍存在无法兼顾高过滤效率和低空气阻力的问题.根据蛛丝微观结构特点,采用静电纺丝技术,通过在纺丝纤维内部引入不同形貌黏土矿物及其微球前驱体的策略,可实现复合纤维及其滤膜材料的多级结构构筑和微观形貌调控,成功设计具有纺锤状埃洛石微球节点的仿生纳米纤维滤膜材料.其纤维表面富含亲水基团及活性位点,粗糙的表面形貌具有高表面能及PM2.5颗粒的强捕获性.对比纯纺丝滤膜(62.59μm),纺锤状节点滤膜具有蓬松的纤维膜层间架构(74.17μm)及窄尺寸的表面孔隙,可实现稳定高效的PM2.5过滤效率(>85.0%)及持续低压差阻力(~39 Pa).本文探索了纳米纤维的官能化、多层次结构构建和微观形貌调控对纺丝滤膜过滤性能的影响及其过滤机制理论,为其他新型高性能高分子纳米纤维复合材料的设计和开发提供了借鉴.
|
| 关 键 词： | 过滤效率 纺锤状 亲水基团 过滤膜 纳米纤维 过滤性能 过滤机制 埃洛石 |
Electrospinning with a spindle-knot structure for effective PM2.5 capture |
| |
| Authors: | Zongwang Huang Juan Liao Yi Zhang Fulai Yuan Sainan Liu Jing Ouyang Huaming Yang |
| |
| Affiliation: | (Department of Inorganic Materials,School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;Hunan Key Lab of Mineral Materials and Application,Central South University,Changsha 410083,China;Health Management Center,Xiangya Hospital,Central South University,Changsha 410083,China) |
| |
| Abstract: | Long-term air contamination and pollution challenges in particulate matter(PM) have raised fervent concerns for public health, e.g., the PM physical damage or the bacteria and virus carried by the PM. The desired air filter, seeking both high filtration efficiency and low pressure drop remains challenging. Here, we report a bio-inspired spindle-knot halloysite nanotube microsphere-incorporated nanofiber(HNM-NF) filter with the assembly and shape structures of the spider silk. The resulting HNM-NFs exhibit integrated properties of high surface energy, hydrophilicity and strong PM capture. The spindle-knot structures could shrink the outer pore size on two-dimensional(2 D) surface and construct the fluffy 3 D reticular architecture, facilitating high-efficiency air pollutant capture(>85.0%) while maintaining low resistance to airflow(~39 Pa). The spindle-knot construction method was applicable to various materials(i.e.,Al2O3, ZnO and TiO2) and volume production of the microsphere-incorporated NF cartridge. The diversified spindleknot construction will be valuable for adapting to meet different filtration requirements. |
| |
| Keywords: | spindle knot electrospinning bio-inspired PM2 5 air filter |
| 本文献已被 维普 等数据库收录！ |
|
