Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2105067118 |
Liquid crystal display screens as a source for indoor volatile organic compounds | |
Qifan Liu; Jonathan P. D. Abbatt | |
2021-06-08 | |
发表期刊 | Proceedings of the National Academy of Sciences |
出版年 | 2021 |
英文摘要 | Liquid crystal displays (LCDs) have profoundly shaped the lifestyle of humans. However, despite extensive use, their impacts on indoor air quality are unknown. Here, we perform flow cell experiments on three different LCDs, including a new computer monitor, a used laptop, and a new television, to investigate whether their screens can emit air constituents. We found that more than 30 volatile organic compounds (VOCs) were emitted from LCD screens, with a total screen area–normalized emission rate of up to (8.25 ± 0.90) × 109 molecules ⋅ s–1 ⋅ cm–2. In addition to VOCs, 10 liquid crystal monomers (LCMs), a commercial chemical widely used in LCDs, were also observed to be released from those LCD screens. The structural identification of VOCs is based on a “building block” hypothesis (i.e., the screen-emitted VOCs originate from the “building block chemicals” used in the manufacturing of liquid crystals), which are the key components of LCD screens. The identification of LCMs is based upon the detailed information of 362 currently produced LCMs. The emission rates of VOCs and LCMs increased by up to a factor of 9, with an increase of indoor air humidity from 23 to 58% due to water–organic interactions likely facilitating the diffusion rates of organics. These findings indicate that LCD screens are a potentially important source for indoor VOCs that has not been considered previously. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/329826 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Qifan Liu,Jonathan P. D. Abbatt. Liquid crystal display screens as a source for indoor volatile organic compounds[J]. Proceedings of the National Academy of Sciences,2021. |
APA | Qifan Liu,&Jonathan P. D. Abbatt.(2021).Liquid crystal display screens as a source for indoor volatile organic compounds.Proceedings of the National Academy of Sciences. |
MLA | Qifan Liu,et al."Liquid crystal display screens as a source for indoor volatile organic compounds".Proceedings of the National Academy of Sciences (2021). |
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