PDF(Pubmed)
Abstract：
The steep increase in carbon dioxide (CO2) emissions has created great concern due to its role in the greenhouse effect and global warming. One approach to mitigate CO2 levels involves its application in specific technologies. In this context, CO2 can be used for a more sustainable synthesis of polycarbonates (CO2-PCs). In this research, CO2-PC films and composites with multiwalled carbon nanotubes (MWCNTs, ranging from 0.2 to 7.0 wt.%) have been prepared to achieve more sustainable multifunctional sensing devices. The inclusion of the carbonaceous fillers allows for the electrical conductivity to be enhanced, reaching the percolation threshold (Pc) at 0.1 wt.% MWCNTs and a maximum electrical conductivity of 0.107 S·m-1 for the composite containing 1.5 wt.% MWCNTs. The composite containing 3.0 wt.% MWCNTs was also studied, showing a stable and linear response under temperature variations from 40 to 100 °C and from 30 to 45 °C, with a sensitivity of 1.3 × 10-4 °C-1. Thus, this investigation demonstrates the possibility of employing CO2-derived PC/MWCNT composites as thermoresistive sensing materials, allowing for the transition towards sustainable polymer-based electronics.
摘要：
由于其在温室效应和全球变暖中的作用，二氧化碳（CO2）排放量的急剧增加引起了极大的关注。降低CO2水平的一种方法涉及其在特定技术中的应用。在这种情况下，CO2可用于更可持续的聚碳酸酯(CO2-PC)的合成。在这项研究中,CO2-PC薄膜和多壁碳纳米管复合材料（MWCNTs，范围从0.2到7.0wt。％）已准备好实现更可持续的多功能传感设备。含碳填料的包含允许提高导电性,达到渗滤阈值（Pc）为0.1wt。％的MWCNT和包含1.5wt.的复合材料的最大电导率为0.107S·m-1。%MWCNT。该复合材料含有3.0重量%。%MWCNT也进行了研究，在40至100°C和30至45°C的温度变化下显示出稳定的线性响应，灵敏度为1.3×10-4°C-1。因此，这项研究证明了使用CO2衍生的PC/MWCNT复合材料作为热阻传感材料的可能性，允许向可持续的基于聚合物的电子产品过渡。
