Soong Yu-Chian, Li Jia-Wun, Chen Yan-Feng, Chen Jian-Xun, Lee Sanchez William Anderson, Tsai Wei-Yi, Chou Tzu-Yang, Cheng Chih-Chia, Chiu Chih-Wei
Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
Open Innovation, Makalot Industrial Company Limited, Taipei 11071, Taiwan.
ACS Omega. 2021 Oct 7;6(43):28779-28787. doi: 10.1021/acsomega.1c03496. eCollection 2021 Nov 2.
The avoidance and mitigation of energy wastage have attracted increasing attention in the context of global warming and climate change. With advances in materials science, diverse multifunctional materials with high thermal conductivity have shown excellent energy-saving potential. In this study, a hybrid film exhibiting high thermal conductivity with excellent stretchability and washability was prepared. First, a simple surface modification of boron nitride (BN) was performed to realize a modified boron nitride (BNOH) filler. Next, an organic dispersant was synthesized to enhance the dispersion of BNOH and graphene nanoplatelets (GNPs) in the proposed composite. Subsequently, a simple procedure was used to combine the dispersed GNPs and BNOH fillers with thermoplastic polyurethane (TPU) to fabricate a hybrid structure. The hybrid films composed of BNOH-GNP/TPU with a dispersant exhibited a high thermal conductivity of 12.62 W m K at a low filler loading of 20 wt.%. This hybrid film afforded excellent stretchability and washability, as indicated by the very small thermal-conductivity reduction to only 12.23 W m K after 100 cycles of fatigue testing and to 12.01 W m K after 10 washing cycles. Furthermore, the cooling and hydrophobicity properties of the hybrid film were enhanced when compared with neat TPU. Overall, our approach demonstrates a simple and novel strategy to break the passive effect of traditional commercial cooling clothing by combining a high-thermal-conductivity film with an active cooling source to amplify the cooling effect and develop wearable cooled smart clothes with great commercial potential.
在全球变暖和气候变化的背景下，避免和减少能源浪费已引起越来越多的关注。随着材料科学的进步，各种具有高导热性的多功能材料已显示出优异的节能潜力。在本研究中，制备了一种具有高导热性、出色拉伸性和可洗性的混合薄膜。首先，对氮化硼（BN）进行简单的表面改性，以实现改性氮化硼（BNOH）填料。接下来，合成一种有机分散剂，以增强BNOH和石墨烯纳米片（GNPs）在所提出的复合材料中的分散性。随后，采用简单的工艺将分散的GNPs和BNOH填料与热塑性聚氨酯（TPU）结合，以制造一种混合结构。由含有分散剂的BNOH-GNP/TPU组成的混合薄膜在20 wt.%的低填料负载量下表现出12.62 W m⁻¹ K⁻¹的高导热性。这种混合薄膜具有出色的拉伸性和可洗性，如在100次疲劳测试后热导率仅降至12.23 W m⁻¹ K⁻¹，在10次洗涤循环后降至12.01 W m⁻¹ K⁻¹，热导率降低非常小。此外，与纯TPU相比，混合薄膜的冷却和疏水性得到了增强。总体而言，我们的方法展示了一种简单而新颖的策略，通过将高导热薄膜与主动冷却源相结合来打破传统商用冷却服装的被动效应，以放大冷却效果并开发具有巨大商业潜力的可穿戴冷却智能服装。
