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首页> 外文期刊>Environmental Science & Technology >Evaluating the Environmental Impacts of a Nano-Enhanced Field Emission Display Using Life Cycle Assessment: A Screening-Level Study
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Evaluating the Environmental Impacts of a Nano-Enhanced Field Emission Display Using Life Cycle Assessment: A Screening-Level Study

机译：使用生命周期评估评估纳米增强场发射显示器的环境影响：一项筛选水平研究

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摘要

Carbon nanotube (CNT) field emission displays (FEDs) are currently in the product development stage and are expected to be commercialized in the near future because they offer image quality and viewing angles comparable to a cathode ray tube (CRT) while using a thinner structure, similar to a liquid crystal display (LCD), and enable more efficient power consumption during use. To address concerns regarding the environmental performance of CNT-FEDs, a screening-level, cradle-to-grave life cycle assessment (LCA) was conducted based on a functional unit of 10 000 viewing hours, the viewing lifespan of a CNT-FED. Contribution analysis suggests the impacts for material acquisition and manufacturing are greater than the combined impacts for use and end-of-life. A scenario analysis of the CNT paste composition identifies the metal components used in the paste are key contributors to the impacts of the upstream stages due to the impacts associated with metal preparation. Further improvement of the manufacturing impacts is possible by considering the use of plant-based oils, such as rapeseed oil, as alternatives to organic solvents for dispersion of CNTs. Given the differences in viewing lifespan, the impacts of the CNT-FED were compared with a LCD and a CRT display to provide more insight on how to improve the CNT-FED to make it a viable product alternative. When compared with CRT technology, CNT-FEDs show better environmental performance, whereas a comparison with LCD technology indicates the environmental impacts are roughly the same. Based on the results, the enhanced viewing capabilities of CNT-FEDs will be a more viable display option if manufacturers can increase the product's expected viewing lifespan.
机译：碳纳米管（CNT）场致发射显示器（FED）目前处于产品开发阶段，并且有望在不久的将来实现商业化，因为它们使用较薄的结构可提供与阴极射线管（CRT）相当的图像质量和视角。类似于液晶显示器（LCD），并在使用过程中实现了更高效的功耗。为了解决对CNT-FED的环境性能的担忧，基于10,000个观察小时（CNT-FED的观察寿命）的功能单元，进行了筛查级，从摇篮到重击的生命周期评估（LCA）。贡献分析表明，对材料购置和制造的影响要大于对使用和报废的综合影响。 CNT糊料成分的场景分析确定，由于与金属制备相关的影响，糊料中使用的金属成分是上游阶段影响的关键因素。通过考虑使用植物油（例如菜籽油）作为分散CNT的有机溶剂的替代品，可以进一步改善制造影响。鉴于观看寿命的差异，我们将CNT-FED的影响与LCD和CRT显示器进行了比较，以提供有关如何改进CNT-FED使其成为可行产品替代品的更多见解。与CRT技术相比，CNT-FED具有更好的环境性能，而与LCD技术的比较表明，对环境的影响大致相同。根据结果​​，如果制造商可以延长产品的预期观察寿命，则增强CNT-FED的观察能力将是一种更可行的显示选项。

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  • 来源
    《Environmental Science & Technology》 |2014年第2期|1194-1205|共12页
  • 作者

    Venkata K. K. Upadhyayula; David E. Meyer; Mary Ann Curran; Michael A. Gonzalez;

  • 作者单位

    Oak Ridge Institute of Science and Education, MC-100-44, PO Box 117, Oak Ridge, Tennessee 37831, United States;

    United States Environmental Protection Agency, Systems Analysis Branch, National Risk Management Research Laboratory, 26 West Martin Luther King Drive, Cincinnati, Ohio 45268, United States;

    United States Environmental Protection Agency, Systems Analysis Branch, National Risk Management Research Laboratory, 26 West Martin Luther King Drive, Cincinnati, Ohio 45268, United States;

    United States Environmental Protection Agency, Systems Analysis Branch, National Risk Management Research Laboratory, 26 West Martin Luther King Drive, Cincinnati, Ohio 45268, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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