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Zhou M, Yu Y, Zhou Y, Song L, Wang S, Na D. Graphene-based strain sensor with sandwich structure and its application in bowel sounds monitoring. RSC Adv 2022; 12:29103-29112. [PMID: 36320767 PMCID: PMC9555162 DOI: 10.1039/d2ra04402a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 10/04/2022] [Indexed: 11/07/2022] Open
Abstract
Surgery is one of the primary treatment modalities for gastrointestinal tumors but can lead to postoperative ileus (POI), which can aggravate pain and increase costs. The incidence of POI can be effectively reduced by monitoring bowel sounds to assist doctors in deciding the timing of transoral feeding. In this study, we prepared a flexible strain sensor based on a graphene composite material and tested the feasibility of sensor monitoring of bowel sounds using simultaneous stethoscope and sensor monitoring. We found that the time of hearing the bowel sounds (12.0–12.1 s) corresponded to the time of waveform change monitored by the sensor (12.036 s), and the sound tone magnitude corresponded to the waveform amplitude. This proves that the application of sensors to monitor bowel sounds is feasible, which opens up a new field for the application of graphene sensors and provides a new way for clinicians to judge the condition of the intestine. Combining medicine and materials science. First application of graphene strain sensors for monitoring bowel sounds![]()
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Affiliation(s)
- Min Zhou
- Department of Surgical Oncology, The First Affiliated Hospital of China Medical UniversityChina
| | - Yin Yu
- College of Medicine and Bioinformatics Engineering, Northeastern UniversityShenyang 110819China
| | - Yi Zhou
- Dyson School of Design Engineering, Imperial College LondonLondon SW7 2DBUK
| | - Lihui Song
- Department of Surgical Oncology, The First Affiliated Hospital of China Medical UniversityChina
| | - Siyi Wang
- Department of Surgical Oncology, The First Affiliated Hospital of China Medical UniversityChina
| | - Di Na
- Department of Surgical Oncology, The First Affiliated Hospital of China Medical UniversityChina,Department of Surgical Oncology and General Surgery, Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors, Ministry of Education, The First Affiliated Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina
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Cui X, Guo J, Araby S, Abbassi F, Zhang C, Diaby AL, Meng Q. Porous polyvinyl alcohol/graphene oxide composite film for strain sensing and energy-storage applications. NANOTECHNOLOGY 2022; 33:415701. [PMID: 35732160 DOI: 10.1088/1361-6528/ac7b35] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
In this study, a flexible porous polyvinyl alcohol (PVA)/graphene oxide (GO) composite film was developed and tested for flexible strain sensing and energy-storage applications. Morphology and mechanical properties were studied; tensile strength and Young's modulus increased by 225% and 86.88%, respectively, at 0.5 wt% GO. The PVA/GO film possesses exceptional sensing ability to various mechanical strains, such as tension, compression, bending, and torsion. For example, the gauge factor of the PVA/GO film as a tensile-strain sensor was measured as 2.46 (246%). Under compression loads, the PVA/GO composite film showed piezoresistive and capacitive strain-sensing characteristics. Under 5 kPa of compression load, the relative resistance increased by 81% with a 100 msec response time; the relative capacitance increased by 160% with a 120 msec response time. The PVA/GO strain sensor exhibited high durability and reliability over 20 × 103cycles of tensile strain and bending at 3.33 Hz. Moreover, the PVA/GO composite film showed good electrochemical properties due to its porous structure; the maximum capacitance was 124.7 F g-1at 0.5 wt% GO. After 20 × 103charging-discharging cycles, the capacitance retention rate was 94.45%, representing high stable capacitance performance. The results show that electrically conductive porous PVA nanocomposite films are promising candidates for strain sensing and energy-storage devices.
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Affiliation(s)
- Xu Cui
- College of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, People's Republic of China
| | - Jia Guo
- College of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, People's Republic of China
| | - Sherif Araby
- Department of Mechanical and Aerospace Engineering, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
- Department of Mechanical Engineering, Faculty of Engineering, Benha University, Benha, Egypt
| | - Fethi Abbassi
- College of Engineering and Technology, American University of the Middle East, Kuwait
| | - Chunyan Zhang
- College of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, People's Republic of China
| | | | - Qingshi Meng
- College of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, People's Republic of China
- College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, People's Republic of China
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Yu S, Ni J, Zhou Z, Xu S, Li D, Li Y, Qiu J. Perfect Broadband Sound Absorption on a Graphene-Decorated Porous System with Dual-3D Structures. ACS APPLIED MATERIALS & INTERFACES 2022; 14:28145-28153. [PMID: 35670698 DOI: 10.1021/acsami.2c01599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Noise is a threat to human life quality and an invisible killer that causes many chronic diseases. The vast majority of porous sound absorbers are single-phased, which limits their sound absorption potential. Herein, a graphene-decorated porous system (GDPS) prepared using the immersion-hydrothermal-freezing self-assembly method is reported as an efficient sound absorber based on its unique consecutive double three-dimensional (dual-3D) structure. Due to the increased tortuosity and other gain effects, the novel structure can achieve the perfect broadband absorption at a wide bandwidth in which the sound absorption coefficient exceeds 0.9 easily. Within the effective thicknesses, the widest perfect absorption bandwidth of 814-6400 Hz is realized. Moreover, a higher graphene concentration and the addition of a polymer are found to be able to decrease the absorption frequency to the lowest values of 1979 and 1544 Hz, respectively. The design of a unique dual-3D structure opens up new strategies and applications to use graphene aerogels in noise and vibration applications.
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Affiliation(s)
- Silin Yu
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China
| | - Jingnan Ni
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China
| | - Zhiling Zhou
- School of Physics Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Shijie Xu
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China
| | - Dongting Li
- School of Physics Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Yong Li
- School of Physics Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Jun Qiu
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China
- Key Laboratory of Advanced Civil Engineering Materials, Education of Ministry, Tongji University, Shanghai 201804, P. R. China
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4
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Zhou Y, Myant C, Stewart R. Multifunctional and stretchable graphene/textile composite sensor for human motion monitoring. J Appl Polym Sci 2022. [DOI: 10.1002/app.52755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yi Zhou
- Dyson School of Design Engineering Imperial College London London
| | - Connor Myant
- Dyson School of Design Engineering Imperial College London London
| | - Rebecca Stewart
- Dyson School of Design Engineering Imperial College London London
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Chen Y, Liang Y, Liu J, Yang J, Jia N, Zhu C, Zhang J. Optimizing microenvironment by integrating negative pressure and exogenous electric fields via a flexible porous conductive dressing to accelerate wound healing. Biomater Sci 2021; 9:238-251. [PMID: 33184620 DOI: 10.1039/d0bm01172j] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Wound healing is a complex and sequential biological process that involves multiple stages. Current treatments for nonhealing or chronic wounds are unsatisfactory as they exert a single effect on one specific activity. Herein, we constructed a silver nanowire (AgNW)-based, three-dimensional (3D), porous foam dressing that is flexible and conductive. This conductive foam dressing was composed of AgNWs modified with a stable hydrophobic coating and porous polyurethane (PU), providing a skeleton to support the 3D conductive networks. The AgNWs-PU foam dressing exhibited favorable biocompatibility, outstanding electrical properties, excellent bending-compression durability, and long-term stability under wet conditions, making it suitable for wound treatment. Via the conductive foam dressing, negative pressure and exogenous wound directional electric fields (EFs) could be integrated for simultaneous implementation, and the artificial jointly constructed microenvironment promoted wound healing in a system. This novel "all-in-one" device presented intrinsic multifunctionality, including the drainage of pus and necrotic tissue, mitigation of inflammation, promotion of cell proliferation, direction of keratinocyte migration, and induction of angiogenesis. An immunohistochemical assay and western blot analysis illustrated that the angiogenesis and cell proliferation pathways in the tissue were significantly activated when this novel therapy was adopted. More importantly, the practical performance of this "all-in-one" device was demonstrated by assessment of full-thickness defect wounds in model pigs. Comparing the percentage of residual wound area after administration of traditional treatment (25.82 ± 3.52%) and the novel treatment (3.07 ± 1.23%) demonstrated the promising applications of this novel treatment in clinical wound healing.
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Affiliation(s)
- Ying Chen
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.
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Cui X, Tian J, Zhang C, Cai R, Ma J, Yang Z, Meng Q. Comparative Study of Nanocarbon-Based Flexible Multifunctional Composite Electrodes. ACS OMEGA 2021; 6:2526-2541. [PMID: 33553871 PMCID: PMC7859947 DOI: 10.1021/acsomega.0c04313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
Although nanocarbon-based nanofillers have been widely used to improve the energy-storing and sensing functions of porous materials, the comparison of the effects of different nanocarbon-based fillers on the capacitive and flexible sensing properties of nanocarbon-based porous sponge composite supercapacitor electrodes by combining a carbon nanotube, graphene, and graphene oxide with porous sponge is incomplete. The specific capacitance of carbon nanotube-based electrodes is 20.1 F/g. The specific capacitance of graphene-based electrodes is 26.7 F/g. The specific capacitance of graphene oxide-based electrodes is 78.1 F/g, and the capacity retention rate is 92.99% under 20 000 charge-discharge cycles. Under a bending load of 180°, the capacitance retention rate of graphene oxide sponge composite electrodes is 67.46%, which indicates that the prepared electrodes of supercapacitor have the advantages of high capacitance and good flexibility at the same time. To demonstrate their performance, an array of three graphene oxide supercapacitors in series was constructed, which could light up a red light-emitting diode (LED). The tensile strength of carbon nanotube sponge composite electrodes is 0.267 MPa, and the tensile linearity is 0.0169. The experimental results show that graphene oxide-based sponge composite supercapacitor electrodes have the best capacitance performance and carbon nanotube sponge composites have the most potential as a flexible sensor.
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Affiliation(s)
- Xu Cui
- College
of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, China
| | - Jiayu Tian
- College
of Aerospace Engineering, Shenyang Aerospace
University, Shenyang 110136, China
| | - Chunyan Zhang
- College
of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, China
| | - Rui Cai
- School
of Mechanical, Aerospace and Automotive Engineering, Coventry University, Coventry CV1 5FB, U.K.
| | - Jun Ma
- School
of Engineering, University of South Australia, Mawson Lakes, Adelaide, SA 5095, Australia
| | - Zhaokun Yang
- School of
Mechanical Technology, Wuxi Institute of
Technology, Wuxi 214122, China
| | - Qingshi Meng
- College
of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, China
- College
of Aerospace Engineering, Shenyang Aerospace
University, Shenyang 110136, China
- Shenyang
Aircraft Design Institute, Shenyang 110000, China
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Meng Q, Han S, Liu T, Ma J, Ji S, Dai J, Kang H, Ma J. Noncovalent Modification of Boron Nitrite Nanosheets for Thermally Conductive, Mechanically Resilient Epoxy Nanocomposites. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03133] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Qingshi Meng
- College of Aerospace Engineering, Shenyang Aerospace University, 37 Daoyi South Avenue, Shenyang, Liaoning 110136, China
| | - Sensen Han
- College of Aerospace Engineering, Shenyang Aerospace University, 37 Daoyi South Avenue, Shenyang, Liaoning 110136, China
| | - Tianqing Liu
- NICM Health Research Institute, Western Sydney University, Westmead 2145, Australia
| | - Jian Ma
- Administrative Department, Shenyang Aerospace University, 37 Daoyi South Avenue, Shenyang, Liaoning 110136, China
| | - Shude Ji
- College of Aerospace Engineering, Shenyang Aerospace University, 37 Daoyi South Avenue, Shenyang, Liaoning 110136, China
| | - Jiabin Dai
- University of South Australia, UniSA STEM, Mawson Lakes, SA 5095, Australia
| | - Hailan Kang
- School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China
| | - Jun Ma
- College of Aerospace Engineering, Shenyang Aerospace University, 37 Daoyi South Avenue, Shenyang, Liaoning 110136, China
- University of South Australia, UniSA STEM, Mawson Lakes, SA 5095, Australia
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