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首页> 外文会议>16th Annual technical conference and exposition of the American Filtration and Separations Society >EFFECT OF CARBON PARTICULATE CONTENT AND SURFACE NANOFIBERSUPON FILTRATION PERFORMANCE OF NONWOVEN MEDIA
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EFFECT OF CARBON PARTICULATE CONTENT AND SURFACE NANOFIBERSUPON FILTRATION PERFORMANCE OF NONWOVEN MEDIA

机译：非织造布介质中碳微粒含量和表面纳米纤维对过滤性能的影响

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摘要

Soft, stretchy, microporous fabrics can be prepared and modified to be effective filters for use inrnprotective clothing. Advanced fiber-based filtration media can be designed to filter not only aerosolrnparticulates but organic vapors as well, through the inclusion of activated carbon particles and nanofibersrninto the filter fabric. However, it is important to fully characterize the vapor and particulate penetrationrncharacteristics of these materials if they are to be used in clothing systems designed to protect the wearerrnfrom chemicals or aerosols. Reported in this paper are the air, vapor and aerosol transport properties andrnpore size measurements of three melt blown elastic fabrics containing varied levels of activated carbonrncommingled with the fibers. The activated carbon in the fabrics provides protection from organic vapors.rnVapor breakthrough times and concentrations depend not only upon carbon concentration within the web,rnbut the integrity of carbon distribution throughout the thickness. Permeation results for the novel elasticrncarbon-loaded fabrics are compared to a commercial carbon-loaded polypropylene web and anrnexperimental polyethylene nonwoven. The effect of adding an electrospun scrim to these nonwovens isrnexamined. Characterization methods include aerosol particle filtration, air flow resistance and capillaryrnliquid expulsion porometry. Carbon-loaded melt blown fabrics produced with thermoplastic polyurethanern(TPU) elastic fibers are not effective aerosol particle barriers for particles in the 1-5 micron size, but meltrnblown fabrics containing carbon and polypropylene and polyethylene fibers provide better than 88%rnfiltration from aerosol. Very thin layers of TPU elastic nanofibers lightly sprayed onto the outer surfacernof the original melt blown layers are able to completely eliminate small particle penetration of carbonloadedrnmelt blown fabrics. Measurements of air flow resistance for the coated and uncoated melt blownrnlayers show the expected trends of a decrease of air permeability with increased electrospun fiber coatingrnweight. Porometry for the original melt blown and melt blown/electrospun materials gives a quantitativernmeasure of the decrease in pore throat size due to the electrospun scrim layer. The decrease in mean porernthroat size is responsible for the increased particle filtration of the coated melt blown fabrics.rnApplications of these carbon-loaded filter fabrics for future protective clothing systems is discussed.
机译：可以制备柔软，有弹性的微孔织物，并将其改性以成为用于防护服的有效过滤器。通过将活性炭颗粒和纳米纤维混入滤布中，可以设计出基于纤维的高级过滤介质，不仅可以过滤气溶胶颗粒，还可以过滤有机蒸气。但是，重要的是要充分表征这些材料的蒸气和颗粒渗透特性，如果将它们用于设计用于保护穿戴者免受化学物质或气溶胶侵害的服装系统中，则很重要。本文报道的是三种含不同水平活性炭与纤维混合的熔喷弹性织物的空气，蒸汽和气溶胶传输性能以及孔径的测量。织物中的活性炭可防止有机蒸气。蒸气穿透时间和浓度不仅取决于纤维网中的碳浓度，还取决于整个厚度范围内碳分布的完整性。将新型弹性碳纤维织物的渗透结果与商用碳纤维聚丙烯网和实验性聚乙烯非织造布的渗透结果进行了比较。研究了向这些非织造布添加静电纺稀松布的效果。表征方法包括气溶胶颗粒过滤，气流阻力和毛细管排液孔率法。用热塑性聚氨酯（TPU）弹性纤维生产的含碳熔喷织物对于1-5微米大小的颗粒不是有效的气溶胶颗粒屏障，但是包含碳，聚丙烯和聚乙烯纤维的熔喷织物可提供优于88％的气溶胶过滤率。将非常薄的TPU弹性纳米纤维层轻轻喷洒到外表面上，原始的熔喷层能够完全消除碳载熔喷织物的小颗粒渗透。对涂覆和未涂覆的熔喷层的空气流动阻力的测量表明，随着电纺纤维涂层重量的增加，空气渗透性下降的预期趋势。原始熔喷和熔喷/电纺材料的孔度测量可以定量测量由于电纺稀松布层导致的孔喉尺寸减少。平均孔喉尺寸的减小是导致涂覆的熔喷织物的颗粒过滤增加的原因。讨论了这些碳载滤布在未来防护服系统中的应用。

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  • 会议地点 Reno NV(US)
  • 作者

    Phillip W. Gibson; Larry C. Wadsworth; Stephan Zippel; Heidi L. Schreuder-Gibson; Walter Zukas; Bernard Mishkin;

  • 作者单位

    U.S. Army Soldier Centerrn(AMSSB-RSS-MS)rnNatick, MA 01760-5020rnPhone: 01-508-233-4273rnFax: 01-508-233-5521rnPhil.Gibson@natick.army.mil;

    204 TANDEC BuildingrnUniversity of Tennesseern1321 White Ave.rnKnoxville, TN 37996-1950rnPhone: 01-865-974-3572rnlwadswor@utk.edu;

    Armed ForcesrnScientific Institute forrnProtection TechnologiesrnNBC-ProtectionrnP.O.-Box 1142rn29 623 Munster, GermanyrnPhone: 49-5192-136-275rnStephanZippel@bwb.org;

    U.S. Army Soldier Centerrn(AMSSB-RSS-MS)rnNatick, MA 01760-5020rnPhone: 01-508-233-5487rnFax: 01-508-233-5521rnHeidi.Gibson@natick.army.mil;

    U.S. Army Soldier Centerrn(AMSSB-RIP-C)rnNatick, MA 01760-5019rnPhone: 01-508-233-5656rnWalter.Zukas@natick.army.mil;

    Moldex, Inc.rn10111 West Jefferson Blvd.rnCulver City, CA 90232rnPhone: 800-421-0668rnFax: 310-837-9563rnBe;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 油气田开发与开采;
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