Energy efficient out-of-oven manufacturing of natural fibre composites with integrated sensing capabilities and improved water barrier properties
Energy efficient out-of-oven manufacturing of natural fibre composites with integrated sensing capabilities and improved water barrier properties
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DOI：
10.1016/j.compscitech.2023.110062
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发表时间：
2023-05-03
影响因子：
9.1
通讯作者：
Zhang, Han
中科院分区：
文献类型：
--
作者：
Wang, Yushen;Yao, Xudan;Zhang, Han
由于人们对可持续发展和全球环境意识的提高，生物基和生态友好型材料受到了极大的关注。与许多合成纤维相比，在复合材料中使用天然纤维可以减少温室气体排放和碳足迹。然而，天然纤维增强塑料仍然存在一些挑战和担忧，例如在其制造阶段的高吸湿性和高能耗。为了应对这些挑战，本研究开发了一种基于导电生物聚合物纳米复合材料膜的节能型炉外制造方法，以制造在整个生命周期中具有集成多功能性的天然纤维增强复合材料。智能纳米复合材料层作为一个自主的自我调节加热元件，在所需的温度下固化层压材料，而没有过热的风险。通过从表面层到层压板的直接热传导，实现了极高的能源效率，并显著降低了能耗（与传统烘箱固化相比降低了95%）。固化层压板上的嵌入式纳米复合材料表面膜随后成为一个集成的多功能层，提供集成的实时变形和损伤传感能力，增强防水性能，以延长天然纤维复合材料的使用寿命。
Bio-based and eco-friendly materials have gained a great amount of attention, thanks to the increased awareness of sustainable development and global environments. The use of natural fibres in composites can reduce greenhouse gas emissions and the carbon footprint compared to many synthetic fibres. However, some challenges and concerns remain in natural fibre-reinforced plastics, such as the high moisture absorption and high energy consumption during their manufacturing stage. To tackle these challenges, this study developed an energy-efficient out-of-oven manufacturing method based on a conductive biopolymer nanocomposite film to fabricate natural fibre-reinforced composites with integrated multifunctionalities throughout their life cycle. The smart nanocomposite layer works as an autonomous self-regulating heating element to cure the laminates at the desired temperature without the risk of overheating. Extremely high energy efficiency has been achieved with a significantly reduced energy consumption (a 95% reduction compared with traditional oven curing), which has been attained through the direct heat conduction from the surface layer to the laminates. The embedded nanocomposite surface film on the cured laminate subsequently becomes an integrated multifunctional layer, providing integrated real-time deformation and damage sensing capabilities with enhanced water barrier properties to prolong the service life of natural fibre composites.