Zhou Zhi-Min, Wang Ke, Lin Kai-Wen, Wang Yue-Hui, Li Jing-Ze
Department of Materials and Food, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, China.
Department of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
Micromachines (Basel). 2021 Jan 26;12(2):129. doi: 10.3390/mi12020129.
Graphene-thermoplastic polyurethane (G-TPU) composite films were fabricated by traditional blending method and tape casting process with commercial graphene sheets as functional fillers and TPU masterbatches of four different melting points as matrix, respectively. The effects of matrix on the distribution of graphene, the electrical conductivity, and infrared (IR) light thermal properties of the G-TPU composite films were investigated. The experimental results reveal that the characteristics of TPU has little influence on the electrical conductivity of the G-TPU composite films, although the four TPU solutions have different viscosities. However, under the same graphene mass content, the thermal conductivity of four G-TPU composite films with different melting points is significantly different. The four kinds of G-TPU composite films have obvious infrared (IR) thermal effect. There is little difference in the temperatures between the composite films prepared by TPU with melting a point of 100 °C, 120 °C, and 140 °C, respectively; however, when the content of graphene is less than 5 wt%, the temperature of the composite film prepared by TPU with a melting point of 163 °C is obviously lower than that of the other three composite films. The possible reason for this phenomenon is related to the structure of TPU.
采用传统共混法和流延工艺，分别以商用石墨烯片材为功能填料、四种不同熔点的热塑性聚氨酯（TPU）母粒为基体，制备了石墨烯-热塑性聚氨酯（G-TPU）复合薄膜。研究了基体对G-TPU复合薄膜中石墨烯分布、电导率以及红外（IR）光热性能的影响。实验结果表明，尽管四种TPU溶液的粘度不同，但TPU的特性对G-TPU复合薄膜的电导率影响较小。然而，在相同的石墨烯质量含量下，四种不同熔点的G-TPU复合薄膜的热导率存在显著差异。这四种G-TPU复合薄膜均具有明显的红外（IR）热效应。分别由熔点为100℃、120℃和140℃的TPU制备的复合薄膜之间的温度差异不大；然而，当石墨烯含量小于5wt%时，由熔点为163℃的TPU制备的复合薄膜的温度明显低于其他三种复合薄膜。这种现象的可能原因与TPU的结构有关。
