A sensitive humidity-responsive actuator based on Dispersing graphene oxide into Chitosan- sodium alginate nanofibers

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-05-18 DOI:10.1016/j.cej.2025.163927

Yonghao Chen, Meijie Qu, Chenshen Liu, Shuhui Li, Xincheng Wang, Daixuan Gong, Ping Tang, Yuezhen Bin

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引用次数: 0

Abstract

Humidity-driven actuators have attracted much attention from researchers due to their fast response and recovery speed, high sensitivity, and large bending deformation. Graphene oxide (GO), with abundant oxygen-containing functional groups and a large specific surface area, has been widely used in the field of flexible humidity-driven actuators. However, pure graphene oxide films have poor mechanical properties and are easily damaged in practical applications, and these limitations can be addressed by integrating GO with other materials. It has been reported that chitosan (CS) and sodium alginate (SA) can be assembled together by ultrasound to prepare CSSA nanofibers with high tensile strength and excellent hygroscopic properties. In this study, a uniform, flexible actuator based on a thin film was developed by combining graphene oxide with CSSA nanofibers. The obtained 32 μm CSSA10-GO1 film (the mass ratio of CSSA and GO is 10:1) exhibits excellent humidity-driven performance, with maximum deflection angle and driving force of 218° and 2.5 N at ΔRH = 45 %, and response and recovery times of 20.5 s and 201.8 s, respectively. In addition, the film has excellent cycle and solubility resistance stability, and the prepared film remains stable even after 50 humidity cycle tests and 7 days of immersion in water. In addition, the composite film was able to grip and lift heavy objects up to 70 times its own weight by simple design. With such excellent properties, the prepared composite film is expected to be used in soft robotics, artificial muscles and other applications.

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基于将氧化石墨烯分散到壳聚糖-海藻酸钠纳米纤维中的敏感湿度响应驱动器

湿度驱动执行器因其响应速度快、恢复速度快、灵敏度高、弯曲变形大等特点而受到研究人员的广泛关注。氧化石墨烯（GO）具有丰富的含氧官能团和较大的比表面积，被广泛应用于柔性湿驱动执行器领域。然而，纯氧化石墨烯薄膜的机械性能较差，在实际应用中容易损坏，这些限制可以通过将氧化石墨烯与其他材料集成来解决。有报道称，将壳聚糖（CS）和海藻酸钠（SA）通过超声波组装在一起，可以制备出具有高拉伸强度和优异吸湿性能的CSSA纳米纤维。在这项研究中，通过将氧化石墨烯与CSSA纳米纤维结合，开发了一种基于薄膜的均匀柔性致动器。获得的32 μm CSSA10-GO1薄膜（CSSA与GO的质量比为10:1）具有优异的湿驱动性能，在ΔRH = 45 %时，最大挠度为218°，最大驱动力为2.5 N，响应时间为20.5 s，恢复时间为201.8 s。此外，该膜具有优异的循环和抗溶解度稳定性，制备的膜即使经过50个湿度循环试验和7 天的浸水也保持稳定。此外，通过简单的设计，复合薄膜能够抓住和举起重量达自身重量70倍的重物。具有如此优异的性能，所制备的复合膜有望应用于软机器人、人造肌肉等领域。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.