Polyethylene/Polypropylene Bicomponent Spunbond Air Filtration Materials Containing Magnesium Stearate for Efficient Fine Particle Capture
Polyethylene/Polypropylene Bicomponent Spunbond Air Filtration Materials Containing Magnesium Stearate for Efficient Fine Particle Capture
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DOI：
10.1021/acsami.9b13162
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发表时间：
2019-10-30
影响因子：
9.5
通讯作者：
Jin, Xiangyu
中科院分区：
文献类型：
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作者：
Liu, Jinxin;Zhang, Haifeng;Jin, Xiangyu
颗粒物(PM)对人们的生活环境构成威胁。新风通风系统可以过滤颗粒物，在提高室内空气品质方面发挥着重要作用。过滤效率高、压降低的材料延长了过滤器的使用寿命，降低了能耗。然而，保持驻极体材料中电荷的长期存储仍然是一个挑战。本文报道了一种以聚乙烯/聚丙烯(PE/PP)为基质聚合物，硬脂酸镁(MGST)为电荷增强剂的新型鞘/芯双组分自旋键合(BCS)驻极体材料，该材料具有压降小、电荷稳定性好等特点。得益于纺粘技术和透气增强形成的三维(3D)蓬松结构，所得到的驻极体材料具有低压降37.92Pa.优良的吸尘能力10.87gm(-2)和高过滤效率98.94%。此外，由于MGST的引入，过滤效率在90天内仅下降了4.1%。用MGST成功制备了PE/PP BCS材料，不仅为颗粒捕集提供了良好的介质，而且为新风过滤材料的设计开辟了一条新途径。
Particulate matter (PM) poses a threat to people's living environment. Fresh air ventilation systems can filter particulate matter and play an important role in enhancing indoor air quality. A high filtration efficiency material with low pressure drop prolongs the service life of the filters and reduces energy consumption. However, maintaining the long-term storage of charge in electret materials remains a challenge. Herein, we report a novel sheath/core bicomponent spunbond (BCS) electret material with low pressure drop and improved charge stability using polyethylene/polypropylene (PE/PP) as the matrix polymer and magnesium stearate (MgSt) as the charge enhancer. Benefiting from the three-dimensional (3D) fluffy structure created by the spunbond technique and through-air reinforcement, the resulting electret materials exhibit a low pressure drop of 37.92 Pa, excellent dust holding capacity of 10.87 g m(-2), and high filtration efficiency of 98.94%. Moreover, due to the introduction of MgSt, the filtration efficiency only decreased by 4.1% in 90 days. The successful fabrication of PE/PP BCS materials with MgSt not only provided a promising medium for particle capture but also developed a new approach for the design of fresh air filtration materials.