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The Application of Systems Engineering to Functionalize Fabrics at the Nanoscale

机译:系统工程在纳米功能化织物上的应用

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摘要

The soldier as a system contains many subsystems including the clothing they wear. Stakeholders have acknowledged the need for protective garments for soldiers that are not confining and provide defense against harmful chemicals. This research identifies an approach using metal-organic frameworks (MOFs) as a specific nanostructure of interest to be attached to fibers, creating a protective suit that is lighter and allows the soldier to move with ease.;A bottom-up design approach was used to satisfy the stakeholder requirements and the reactive dye method (RDM) was developed to provide a generic route to attach nanostructures to the surface of the fabric utilizing cyanuric chloride modified with a thiol. This method successfully bound gold nanoparticles, quantum dots, and the MOF, Cu-BTC, to cotton and nylon fibers. Although Cu-BTC fulfilled the MOF requirement, this particular MOF is unstable in air, and therefore, fails to meet other practical operational requirements.;Thus, cotton fabric functionalized with UiO-66-NH2, a water stable MOF, was investigated in this work. The materials were made by seeding the growth of the MOF on the cotton by first attaching zirconium (Zr) to the surface of the fabric via RDM.;After seeding the fabrics with Zr, the UiO-66-NH2 was grown on the fabric using a hydrothermal method. Several different routes of attaching Zr to cyanuric chloride were examined. Scanning electron microscopy (SEM) and powder X-ray diffraction (PXRD) data are shown to be consistent with UiO-66-NH2, and the fabrics have surfaces areas between 35-246 m2/g depending on the synthetic conditions used to produce the materials. The functionalized cotton reacts with DMNP, a chemical nerve agent simulant, as monitored by UV-Vis. The addition of the MOF to the fibers resulted in reaction rates approximately 20 times faster for DMNP than pure cotton alone.;While RDM and UiO-66-NH2 meet many of the stakeholder requirements, when looking more broadly at the life cycle of the fabrics the production of such a fabric introduces several additional requirements to satisfy production requirements. Therefore an alternative microwave based functionalization of fibers was examined. The fabrics produced using this method performed similarly as the RDM fabrics and could be produced using production scale systems, but the MOF structure was damaged during synthesis.;The results show that a trade space of stakeholder requirements exists and that articulation of systems requirements is required to correctly select an attachment method. Moreover, the results show that definition of the stakeholder needs allows for the development of a clear test and evaluation plan that is consistent with the scientific method. Lastly, the results show that systems engineering can be applied to research programs even at the nanoscale.
机译:士兵作为一个系统包含许多子系统,包括他们穿的衣服。利益相关者已经认识到需要为士兵提供防护服,这些防护服应不仅限于局限,而且还可以防御有害化学物质。这项研究确定了一种方法,该方法使用金属有机骨架(MOF)作为感兴趣的特定纳米结构来附着到纤维上,从而创建了一种保护套,该保护套更轻且使士兵可以轻松移动。;采用了自下而上的设计方法。为了满足利益相关者的要求,开发了活性染料方法(RDM),以提供一种利用巯基改性的氰尿酰氯将纳米结构附着到织物表面的通用途径。此方法成功地将金纳米颗粒,量子点和MOF,Cu-BTC结合到棉和尼龙纤维上。尽管Cu-BTC满足MOF要求,但该特定MOF在空气中不稳定,因此不能满足其他实际操作要求。;因此,本研究了以水稳定型MOF UiO-66-NH2功能化的棉织物。工作。该材料是通过首先通过RDM将锆(Zr)附着在织物表面上而在MOF上在棉上播种来制成的;在用Zr播种织物之后,UiO-66-NH2使用水热法。研究了将Zr附着到氰尿酰氯上的几种不同途径。扫描电子显微镜(SEM)和粉末X射线衍射(PXRD)数据显示与UiO-66-NH2一致,并且织物的表面积介于35-246平方米/克之间,具体取决于生产该织物的合成条件。材料。官能化的棉花与DMNP(一种化学神经毒剂模拟物)发生反应,如UV-Vis所监测。向纤维中添加MOF可使DMNP的反应速率比单独的纯棉快约20倍。;尽管从广义上看织物的生命周期,但RDM和UiO-66-NH2满足了许多利益相关者的要求。这种织物的生产引入了一些额外的要求以满足生产要求。因此,研究了基于微波的纤维的替代功能化。用这种方法生产的织物的性能与RDM织物相似,可以用生产规模的系统生产,但是在合成过程中MOF结构被破坏了;结果表明存在利益相关者需求的交易空间,并且需要系统需求的明确表达正确选择一种附件方法。此外,结果表明,利益相关者需求的定义允许制定与科学方法一致的清晰的测试和评估计划。最后,结果表明,系统工程甚至可以应用于纳米级的研究程序。

著录项

  • 作者

    Bunge, Meagan A.;

  • 作者单位

    University of South Alabama.;

  • 授予单位 University of South Alabama.;
  • 学科 Systems science.
  • 学位 D.Sc.
  • 年度 2018
  • 页码 118 p.
  • 总页数 118
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 药物化学;
  • 关键词

  • 入库时间 2022-08-17 11:40:02

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