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Wei X, Lin T, Wang L, Lin J, Yin X. Research on deep eutectic solvents for the construction of humidity-responsive cellulose nanocrystal composite films. Int J Biol Macromol 2023; 235:123805. [PMID: 36863669 DOI: 10.1016/j.ijbiomac.2023.123805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 02/16/2023] [Accepted: 02/18/2023] [Indexed: 03/04/2023]
Abstract
Photonic crystal materials based on cellulose nanocrystals (CNC), which are environmentally responsive and green, have attracted widespread attention. To overcome the brittleness of CNC films, many researchers have explored functional additives to improve their performance. In this study, a new green deep eutectic solvents (DESs) and an amino acid-based natural deep eutectic solvents (NADESs) were introduced into CNC suspensions for the first time, and hydroxyl-rich small molecules (glycerol, sorbitol) and polymers (polyvinyl alcohol, polyethylene glycol) were coassembled with the DESs and NADESs to form three-component composite films. The CNC/G/NADESs-Arg three-component film reversibly changed color from blue to crimson as the relative humidity rose from 35 % to 100 %; additionally, the elongation at break increased to 3.05 %, and the Young's modulus decreased to 4.52 GPa. The hydrogen bond network structure provided by trace amounts of the DESs or NADESs not only improved the mechanical properties of the composite films but also increased their water absorption capacities without destroying their optical activities. This allows for the development of more stable CNC films and creates potential for biological applications in the future.
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Affiliation(s)
- Xiaoyao Wei
- College of Bioresources Chemical and Materials Engineering, Key Laboratory of Paper Based Functional Materials of China National Light Industry, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, PR China
| | - Tao Lin
- College of Bioresources Chemical and Materials Engineering, Key Laboratory of Paper Based Functional Materials of China National Light Industry, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, PR China
| | - Le Wang
- College of Bioresources Chemical and Materials Engineering, Key Laboratory of Paper Based Functional Materials of China National Light Industry, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, PR China
| | - Jiacheng Lin
- College of Bioresources Chemical and Materials Engineering, Key Laboratory of Paper Based Functional Materials of China National Light Industry, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, PR China
| | - Xuefeng Yin
- College of Bioresources Chemical and Materials Engineering, Key Laboratory of Paper Based Functional Materials of China National Light Industry, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, PR China.
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Anwer AH, Khan N, Ansari MZ, Baek SS, Yi H, Kim S, Noh SM, Jeong C. Recent Advances in Touch Sensors for Flexible Wearable Devices. SENSORS 2022; 22:s22124460. [PMID: 35746242 PMCID: PMC9229189 DOI: 10.3390/s22124460] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 01/27/2023]
Abstract
Many modern user interfaces are based on touch, and such sensors are widely used in displays, Internet of Things (IoT) projects, and robotics. From lamps to touchscreens of smartphones, these user interfaces can be found in an array of applications. However, traditional touch sensors are bulky, complicated, inflexible, and difficult-to-wear devices made of stiff materials. The touch screen is gaining further importance with the trend of current IoT technology flexibly and comfortably used on the skin or clothing to affect different aspects of human life. This review presents an updated overview of the recent advances in this area. Exciting advances in various aspects of touch sensing are discussed, with particular focus on materials, manufacturing, enhancements, and applications of flexible wearable sensors. This review further elaborates on the theoretical principles of various types of touch sensors, including resistive, piezoelectric, and capacitive sensors. The traditional and novel hybrid materials and manufacturing technologies of flexible sensors are considered. This review highlights the multidisciplinary applications of flexible touch sensors, such as e-textiles, e-skins, e-control, and e-healthcare. Finally, the obstacles and prospects for future research that are critical to the broader development and adoption of the technology are surveyed.
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Affiliation(s)
- Abdul Hakeem Anwer
- School of Mechanical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Korea;
- Industrial Chemistry Research Laboratory, Department of Chemistry, Faculty of Sciences, Aligarh Muslim University, Aligarh 202 002, India;
| | - Nishat Khan
- Industrial Chemistry Research Laboratory, Department of Chemistry, Faculty of Sciences, Aligarh Muslim University, Aligarh 202 002, India;
| | - Mohd Zahid Ansari
- School of Materials Science and Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Korea;
| | - Sang-Soo Baek
- Department of Environmental Engineering, Yeungnam University, Gyeongsan 38541, Korea;
| | - Hoon Yi
- Mechanical Technology Group, Global Manufacturing Center, Samsung Electro-Mechanics Co., 150 Maeyeong-ro, Yeongtong-gu, Suwon 16674, Korea;
| | - Soeun Kim
- Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan 44412, Korea;
| | - Seung Man Noh
- Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan 44412, Korea;
- Correspondence: (S.M.N.); (C.J.); Tel.: +82-52-241-6070 (S.M.N.); +82-52-810-2442 (C.J.)
| | - Changyoon Jeong
- School of Mechanical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Korea;
- Correspondence: (S.M.N.); (C.J.); Tel.: +82-52-241-6070 (S.M.N.); +82-52-810-2442 (C.J.)
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Cho S, Chang T, Yu T, Lee CH. Smart Electronic Textiles for Wearable Sensing and Display. BIOSENSORS 2022; 12:bios12040222. [PMID: 35448282 PMCID: PMC9029731 DOI: 10.3390/bios12040222] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/04/2022] [Accepted: 04/06/2022] [Indexed: 05/13/2023]
Abstract
Increasing demand of using everyday clothing in wearable sensing and display has synergistically advanced the field of electronic textiles, or e-textiles. A variety of types of e-textiles have been formed into stretchy fabrics in a manner that can maintain their intrinsic properties of stretchability, breathability, and wearability to fit comfortably across different sizes and shapes of the human body. These unique features have been leveraged to ensure accuracy in capturing physical, chemical, and electrophysiological signals from the skin under ambulatory conditions, while also displaying the sensing data or other immediate information in daily life. Here, we review the emerging trends and recent advances in e-textiles in wearable sensing and display, with a focus on their materials, constructions, and implementations. We also describe perspectives on the remaining challenges of e-textiles to guide future research directions toward wider adoption in practice.
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Affiliation(s)
- Seungse Cho
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA;
| | - Taehoo Chang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA;
| | - Tianhao Yu
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA;
| | - Chi Hwan Lee
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA;
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA;
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA;
- Center for Implantable Devices, Purdue University, West Lafayette, IN 47907, USA
- Correspondence:
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