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SCIENCE CHINA Materials, Volume 61, Issue 10: 1291-1296(2018) https://doi.org/10.1007/s40843-018-9249-y

Moisture-triggered actuator and detector with high-performance: interface engineering of graphene oxide/ethyl cellulose

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  • ReceivedJan 22, 2018
  • AcceptedMar 13, 2018
  • PublishedApr 16, 2018

Abstract

Actuators that can directly convert other forms of environmental energy into mechanical work offer great application prospects in intriguing energy applications and smart devices. But to-date, low cohesion strength of the interface and humidity responsive actuators primarily limit their applications. Herein, by experimentally optimizing interface of bimorph structure, we build graphene oxide/ethyl cellulose bidirectional bending actuators --- a case of bimorphs with fast and reversible shape changes in response to environmental humidity gradients. Meanwhile, we employ the actuator as the engine to drive piezoelectric detector. In this case, graphene oxide and ethyl cellulose are combined with chemical bonds, successfully building a bimorph with binary synergy strengthening and toughening. The excellent hygroscopicity of graphene oxide accompanied with huge volume expansion triggers giant moisture responsiveness greater than 90 degrees. Moreover, the open circuit voltage of piezoelectric detector holds a peak value around 0.1 V and exhibits excellent reversibility. We anticipate that humidity-responsive actuator and detector hold promise for the application and expansion of smart devices in varieties of multifunctional nanosystems.


Funded by

This work was financially supported by the National Basic Research Program of China(2015CB932302)

National Natural Science Foundation of China(U1432133,11621063,21701164)

National Program for Support of Top-notch Young Professionals and the Fundamental Research Funds for the Central Universities(WK2060190084,WK2060190058)


Acknowledgment

This work was financially supported by the National Basic Research Program of China (2015CB932302), National Natural Science Foundation of China (U1432133, 11621063, 21701164), National Program for Support of Top-notch Young Professionals and the Fundamental Research Funds for the Central Universities (WK2060190084, WK2060190058). We would like to thank the Catalysis and Surface Science Endstation (National Synchrotron Radiation Laboratory) for providing the beam time. This work was also supported from the Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology.


Interest statement

The authors declare that they have no conflict of interest.


Contributions statement

Wu C conceived the idea, co-wrote the paper, supervised the entire project and is responsible for the infrastructure and project direction. Yang B experimentally realized the study, analyzed the data and co-wrote the paper. Bi W, Zhong C and Huang M experimentally realized the study, Ni Y and He L supervised the whole experimental procedure and co-wrote the paper. All authors discussed the results and commented on and revised the manuscript.


Author information

Bo Yang received his BSc (2013) and MEng (2016) degrees from School of Physics and Materials Science, Anhui University. He is currently pursuing his PhD under the supervision of Prof. Changzheng Wu and Prof. Linghui He at University of Science and Technology of China (USTC). His research focuses on the design and exploration of smart materials.


Changzheng Wu obtained his BSc (2002) and PhD (2007) degrees from the Department of Chemistry, USTC. Thereafter, he has been working as a postdoctoral fellow in the Hefei National Laboratory for Physical Sciences at Microscale. He is now a full professor of Department of Chemistry, USTC. His current research focuses on the synthesis and characterization of inorganic two-dimensional nanomaterials and regulation of their intrinsic physical properties for a wide range of applications in energy storage or energy conversion.


Supplement

Supplementary information

Supporting data are available in the online version of the paper.


References

[1] Lencka MM, Riman RE. Intelligent synthesis of smart ceramic materials. Encyclopedia of Smart Materials, Heidelberg: John Wiley and Sons, Inc., 2002. Google Scholar

[2] Wang L, Luo ZB, Xia ZX, et al. Review of actuators for high speed active flow control. Sci China Technol Sci, 2012, 55: 2225-2240 CrossRef Google Scholar

[3] Wong YS, Kong JF, Widjaja LK, et al. Biomedical applications of shape-memory polymers: how practically useful are they?. Sci China Chem, 2014, 57: 476-489 CrossRef Google Scholar

[4] Zhao Y, Song L, Zhang Z, et al. Stimulus-responsive graphene systems towards actuator applications. Energy Environ Sci, 2013, 6: 3520 CrossRef Google Scholar

[5] Hu Y, Wu G, Lan T, et al. A graphene-based bimorph structure for design of high performance photoactuators. Adv Mater, 2015, 27: 7867-7873 CrossRef PubMed Google Scholar

[6] Kong L, Chen W. Carbon nanotube and graphene-based bioinspired electrochemical actuators. Adv Mater, 2014, 26: 1025-1043 CrossRef PubMed Google Scholar

[7] Cheng H, Liu J, Zhao Y, et al. Graphene fibers with predetermined deformation as moisture-triggered actuators and robots. Angew Chem Int Ed, 2013, 52: 10482-10486 CrossRef PubMed Google Scholar

[8] Lan T, Hu Y, Wu G, et al. Wavelength-selective and reboundable bimorph photoactuator driven by a dynamic mass transport process. J Mater Chem C, 2015, 3: 1888-1892 CrossRef Google Scholar

[9] Dong L, Yang J, Chhowalla M, et al. Synthesis and reduction of large sized graphene oxide sheets. Chem Soc Rev, 2017, 46: 7306-7316 CrossRef PubMed Google Scholar

[10] Liao L, Peng H, Liu Z. Chemistry makes graphene beyond graphene. J Am Chem Soc, 2014, 136: 12194-12200 CrossRef PubMed Google Scholar

[11] Qin J, Zhou F, Xiao H, et al. Mesoporous polypyrrole-based graphene nanosheets anchoring redox polyoxometalate for all-solid-state micro-supercapacitors with enhanced volumetric capacitance. Sci China Mater, 2018, 61: 233-242 CrossRef Google Scholar

[12] Jian M, Wang C, Wang Q, et al. Advanced carbon materials for flexible and wearable sensors. Sci China Mater, 2017, 60: 1026-1062 CrossRef Google Scholar

[13] Li X, Jiang T, Wang X, et al. Superhydrophobic graphene-decorated mesh gauze: recycling oils and organic solvents enhanced by large-diameter capillary action. Sci China Mater, 2016, 59: 581-588 CrossRef Google Scholar

[14] Han DD, Zhang YL, Jiang HB, et al. Moisture-responsive graphene paper prepared by self-controlled photoreduction. Adv Mater, 2015, 27: 332-338 CrossRef PubMed Google Scholar

[15] Park S, An J, Suk JW, et al. Graphene-based actuators. Small, 2010, 6: 210-212 CrossRef PubMed Google Scholar

[16] Han DD, Zhang YL, Liu Y, et al. Bioinspired graphene actuators prepared by unilateral UV irradiation of graphene oxide papers. Adv Funct Mater, 2015, 25: 4548-4557 CrossRef Google Scholar

[17] Wu C, Feng J, Peng L, et al. Large-area graphene realizing ultrasensitive photothermal actuator with high transparency: new prototype robotic motions under infrared-light stimuli. J Mater Chem, 2011, 21: 18584 CrossRef Google Scholar

[18] Xu G, Zhang M, Zhou Q, et al. A small graphene oxide sheet/polyvinylidene fluoride bilayer actuator with large and rapid responses to multiple stimuli. Nanoscale, 2017, 9: 17465-17470 CrossRef PubMed Google Scholar

[19] Guo F, Kim F, Han TH, et al. Hydration-responsive folding and unfolding in graphene oxide liquid crystal phases. ACS Nano, 2011, 5: 8019-8025 CrossRef PubMed Google Scholar

[20] Marcano DC, Kosynkin DV, Berlin JM, et al. Improved synthesis of graphene oxide. ACS Nano, 2010, 4: 4806-4814 CrossRef PubMed Google Scholar

[21] Chen K, Shi B, Yue Y, et al. Binary synergy strengthening and toughening of bio-inspired nacre-like graphene oxide/sodium alginate composite paper. ACS Nano, 2015, 9: 8165-8175 CrossRef Google Scholar

[22] Pan S, Liu X. CdS–graphene nanocomposite: synthesis, adsorption kinetics and high photocatalytic performance under visible light irradiation. New J Chem, 2012, 36: 1781-1787 CrossRef Google Scholar

[23] Eberhardt ES, Panisik N, Raines RT. Inductive effects on the energetics of prolyl peptide bond isomerization: implications for collagen folding and stability. J Am Chem Soc, 1996, 118: 12261-12266 CrossRef PubMed Google Scholar

[24] Holmgren SK, Bretscher LE, Taylor KM, et al. A hyperstable collagen mimic. Chem Biol, 1999, 6: 63-70 CrossRef Google Scholar

[25] Ganguly A, Sharma S, Papakonstantinou P, et al. Probing the thermal deoxygenation of graphene oxide using high-resolution in situ X-ray-based spectroscopies. J Phys Chem C, 2011, 115: 17009-17019 CrossRef Google Scholar

[26] Park S, Lee KS, Bozoklu G, et al. Graphene oxide papers modified by divalent ions—enhancing mechanical propertiesvia chemical cross-linking. ACS Nano, 2008, 2: 572-578 CrossRef PubMed Google Scholar

[27] Lv XJ, Yao MS, Wang GE, et al. A new 3D cupric coordination polymer as chemiresistor humidity sensor: narrow hysteresis, high sensitivity, fast response and recovery. Sci China Chem, 2017, 60: 1197-1204 CrossRef Google Scholar

  • Figure 1

    Preparation processes and characterizations of GO/EC actuator. (a) Bimorph structure of GO/EC. (b) Schematic illustration of the fabrication process of GO/EC actuator. (c) Cross-sectional SEM image of the GO/EC bimorph. (d) FT-IR spectra of GO, EC and GO-EC. (e) detail in FT-IR spectra of GO, EC and GO-EC.

  • Figure 2

    Demonstration and evaluation of the bimorph as a practical humidity actuator. (a) The mechanism of humidity-responsive actuator. (b) A home-made setup to measure the bending angle of the humidity actuator. (c) Bending angle and humidity as a function of the distance between the water and actuator. (d) Bending angle as a function of humidity. (e) Relative humidity and weight change versus time of GO. (f) Dynamic water vapor sorption isotherm analysis for GO.

  • Figure 3

    Demonstration of the humidity-responsive actuator as a practical piezoelectric detector. (a) Schematic demonstration of the structure for the detector. (b) Photograph of the detector. (c) A moisture-triggered detector. (d, e) Transient responses of the detector driven by moisture.

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