Kang Zhonglei, Zhang Bo-Xing
South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China.
Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China.
ACS Omega. 2024 Nov 25;9(49):48563-48570. doi: 10.1021/acsomega.4c07453. eCollection 2024 Dec 10.
Due to the increasing pressure of environmental protection and the depletion of oil resources, gum (EUG) as a natural renewable and degradable biopolymer has attracted more and more attention. In this work, multilayer carbon nanotube film (CNF)/EUG composite films were fabricated through the infiltration and hot-pressing process. By taking advantage of the elasticity of EUG and the specific strength of CNF, composite films exhibited much more improved mechanical strength (maximum tensile stress up to 108.4 MPa) compared with pristine EUG and CNF alone. In addition, composite films prepared with five CNF layers and five infiltration cycles of EUG solution with a thickness of 181 μm can achieve the highest total shielding effectiveness value of 88 dB in 15.6 GHz. Moreover, the folded composite film can recover quickly to the fixed permanent shape when exposed to infrared light, demonstrating fascinating infrared-triggered shape memory behavior. This work provides a facile and general method to fabricate CNF/EUG composite films and is beneficial for pushing forward the practical application of EUG materials.
由于环境保护压力的不断增加和石油资源的枯竭，杜仲胶（EUG）作为一种天然可再生且可降解的生物聚合物受到了越来越多的关注。在这项工作中，通过渗透和热压工艺制备了多层碳纳米管薄膜（CNF）/EUG复合薄膜。利用杜仲胶的弹性和碳纳米管的比强度，与单独的原始杜仲胶和碳纳米管相比，复合薄膜的机械强度有了显著提高（最大拉伸应力高达108.4MPa）。此外，制备的具有五层碳纳米管层和五个杜仲胶溶液渗透循环、厚度为181μm的复合薄膜，在15.6GHz时可实现高达88dB的最高总屏蔽效能值。而且，折叠后的复合薄膜在暴露于红外光时能够迅速恢复到固定的永久形状，展现出引人入胜的红外触发形状记忆行为。这项工作提供了一种简便通用的方法来制备碳纳米管/杜仲胶复合薄膜，有利于推动杜仲胶材料的实际应用。
