合成氧化石墨烯/明胶复合水凝胶的湿度响应致动器：氧化石墨烯氧化程度的影响

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2024-11-05 DOI:10.1016/j.sna.2024.116032

Supanit Chungyampin , Wissanu Charerntanom , Phakkhananan Pakawanit , Nophawan Paradee , Sumonman Niamlang

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引用次数: 0

摘要

本研究制备了用于湿度响应致动器的氧化石墨烯（GO）。氧化石墨烯具有单原子厚度、丰富的氧气、水溶性和良好的吸湿性等突出特性。GO 是以不同的石墨与高锰酸钾（氧化剂）比例（1:1、1:2、1:3 和 1:4；相应的结构分别称为 GO1、GO2、GO3 和 GO4）制备的。根据氧化剂比例的影响合成的 GO 粒子的内部形态和湿度反应进行了表征。拉曼光谱和透射电子显微镜（TEM）分别对 GO 粒子的缺陷、紊乱和形态特性进行了表征。为了研究湿度响应特性，将制备的 GO 与明胶（GEL）混合。在相对湿度为 80-85 %、温度为 37 ºC 的条件下，研究了 GO/GEL 水凝胶的弯曲角度。通过同步辐射 X 射线断层显微镜分析了混合凝胶的内部结构形态。由于 GO2/GEL 在拉曼光谱中具有最佳强度比 (ID/IG)，因此被选为开发湿度响应致动器的材料。X 射线和 TEM 图像显示 GO2 颗粒在水凝胶基质中分散良好。GO2/GEL 表现出最大的弯曲角度（θ = 930.11 ± 49.28º）和快速的湿度响应（角度变化率 ∼ 9.380 ± 0.513 ºs-1）。因此，GO2 颗粒适合用作湿度致动器应用中的湿度响应材料。

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Humidity-responsive actuators of synthesized graphene oxide/gelatin composite hydrogels: Effect of oxidation degree of graphene oxide

In this study, graphene oxide (GO) was prepared for humidity-responsive actuator application. GO has outstanding properties such as single-atom thickness, abundant oxygen, water solubility, and good moisture absorption. GO was prepared at various graphite:potassium permanganate (oxidizer) ratios (1:1, 1:2, 1:3, and 1:4; the corresponding structures are denoted as GO1, GO2, GO3, and GO4, respectively). The GO particles synthesized according to the effect of the oxidizer ratio were characterized to elucidate the internal morphology and humidity response. The defects and disorders and morphological properties of the GO particles were characterized by Raman spectroscopy and transmission electron microscopy (TEM), respectively. To study the humidity-responsive properties, the prepared GO was blended with gelatin (GEL). The bending angle of the GO/GEL hydrogel was studied at relative humidities of 80–85 % at 37 ºC. The internal structure morphology of the blend gel was analyzed by synchrotron radiation X-ray tomographic microscopy. GO2/GEL was selected for the development of a humidity-responsive actuator because of its optimal intensity ratio (I_D/I_G) in the Raman spectrum. X-ray and TEM images showed the good dispersion of GO2 particles in the hydrogel matrix. GO2/GEL exhibited the largest bending angle (θ = 930.11 ± 49.28º) and fast humidity response (angular rate of change ∼ 9.380 ± 0.513 ºs⁻¹). Thus, GO2 particles are suitable for use as a humidity-responsive material for humidity actuator applications.

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...