Cheng Tiffany, Tahouni Yasaman, Sahin Ekin Sila, Ulrich Kim, Lajewski Silvia, Bonten Christian, Wood Dylan, Rühe Jürgen, Speck Thomas, Menges Achim
Institute for Computational Design and Construction (ICD), University of Stuttgart, Stuttgart, Germany.
Cluster of Excellence IntCDC, University of Stuttgart, Stuttgart, Germany.
Nat Commun. 2024 Nov 28;15(1):10366. doi: 10.1038/s41467-024-54808-8.
In response to the global challenge of reducing carbon emissions and energy consumption from regulating indoor climates, we investigate the applicability of biobased cellulosic materials and bioinspired 4D-printing for weather-responsive adaptive shading in building facades. Cellulose is an abundantly available natural material resource that exhibits hygromorphic actuation potential when used in 4D-printing to emulate motile plant structures in bioinspired bilayers. Three key aspects are addressed: (i) examining the motion response of 4D-printed hygromorphic bilayers to both temperature and relative humidity, (ii) verifying the responsiveness of self-shaping shading elements in lab-generated conditions as well as under daily and seasonal weather conditions for over a year, and (iii) deploying the adaptive shading system for testing in a real building facade by upscaling the 4D-printing manufacturing process. This study demonstrates that hygromorphic bilayers can be utilized for weather-responsive facades and that the presented system is architecturally scalable in quantity. Bioinspired 4D-printing and biobased cellulosic materials offer a resource-efficient and energy-autonomous solution for adaptive shading, with potential contributions towards indoor climate regulation and climate change mitigation.
为应对调节室内气候以减少碳排放和能源消耗这一全球挑战，我们研究了生物基纤维素材料和受生物启发的4D打印技术在建筑立面中对天气响应的自适应遮阳方面的适用性。纤维素是一种储量丰富的天然材料资源，当用于4D打印以在受生物启发的双层结构中模拟能动植物结构时，它具有吸湿变形驱动潜力。我们探讨了三个关键方面：（i）研究4D打印的吸湿变形双层结构对温度和相对湿度的运动响应；（ii）在实验室生成的条件下以及在一年多的日常和季节性天气条件下，验证自成型遮阳元件的响应能力；（iii）通过扩大4D打印制造工艺，将自适应遮阳系统部署到真实建筑立面中进行测试。本研究表明，吸湿变形双层结构可用于对天气响应的立面，且所展示的系统在建筑规模上具有可扩展性。受生物启发的4D打印和生物基纤维素材料为自适应遮阳提供了一种资源高效且能源自主的解决方案，对室内气候调节和缓解气候变化具有潜在贡献。
