Scalable fabrication of free-standing, stretchable CNT/TPE ultrathin composite films for skin adhesive epidermal electronics

2018 ◽  
Vol 6 (25) ◽  
pp. 6666-6671 ◽  
Author(s):  
Yun Liang ◽  
Peng Xiao ◽  
Shuai Wang ◽  
Jiangwei Shi ◽  
Jiang He ◽  
...  
Keyword(s):  
Human Health ◽  
Composite Films ◽  
Wearable Electronics ◽  
Free Standing ◽  
Human Machine Interfaces ◽  
Potential Applications ◽  
Epidermal Electronics

Wearable electronics have drawn extensive interest on account of their potential applications in smart human–machine interfaces, wearable human-health monitors and mimicking biological organs.

An intrinsically stretchable and ultrasensitive nanofiber-based resistive pressure sensor for wearable electronics

2020 ◽  
Vol 8 (16) ◽  
pp. 5361-5369 ◽  
Author(s):  
Fang-Cheng Liang ◽  
Hau-Jen Ku ◽  
Chia-Jung Cho ◽  
Wei-Cheng Chen ◽  
Wen-Ya Lee ◽  
...  
Keyword(s):  
Response Time ◽  
Pressure Sensor ◽  
Applied Pressure ◽  
Normal Pressure ◽  
Lateral Strain ◽  
Mechanical Stimuli ◽  
Wearable Electronics ◽  
Human Machine Interfaces ◽  
Potential Applications ◽  
Ultrahigh Sensitivity

Nanofiber-based electronics with unique fibrous interlocked microstructures are capable of differentiating various mechanical stimuli, such as normal pressure, lateral strain, and bending. Skin-inspired electronics with an ultrahigh sensitivity of 71.07 kPa−1 under a small applied pressure (<0.06 kPa), a rapid response time (<2 ms), and highly reproducible stability (>5000 cycles) are reported, thereby demonstrating their potential applications in versatile human–machine interfaces.

scholarly journals Modulating Carrier Type for Enhanced Thermoelectric Performance of Single-Walled Carbon Nanotubes/Polyethyleneimine Composites

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1295 ◽  
Author(s):  
Xiao-Xi Peng ◽  
Xuan Qiao ◽  
Shuai Luo ◽  
Jun-An Yao ◽  
Yun-Fei Zhang ◽  
...  
Keyword(s):  
Carrier Transport ◽  
Film Formation ◽  
Maximum Output Power ◽  
Composite Films ◽  
Open Circuit ◽  
Maximum Output ◽  
Wearable Electronics ◽  
Single Walled Carbon ◽  
Potential Applications ◽  
Mixing Techniques

Thermoelectric (TE) generators consisting of flexible and lightweight p- and n-type single-walled carbon nanotube (SWCNT)-based composites have potential applications in powering wearable electronics using the temperature difference between the human body and the environment. Tuning the TE properties of SWCNTs, particularly p- versus n-type control, is currently of significant interest. Herein, the TE properties of SWCNT-based flexible films consisting of SWCNTs doped with polyethyleneimine (PEI) were evaluated. The carrier type of the SWCNT/PEI composites was modulated by regulating the proportion of SWCNTs and PEI using simple mixing techniques. The as-prepared SWCNT/PEI composite films were switched from p- to n-type by the addition of a high amount of PEI (>13.0 wt.%). Moreover, interconnected SWCNTs networks were formed due to the excellent SWNT dispersion and film formation. These parameters were improved by the addition of PEI and Nafion, which facilitated effective carrier transport. A TE generator with three thermocouples of p- and n-type SWCNT/PEI flexible composite films delivered an open circuit voltage of 17 mV and a maximum output power of 224 nW at the temperature gradient of 50 K. These promising results showed that the flexible SWCNT/PEI composites have potential applications in wearable and autonomous devices.

scholarly journals Foldable and washable textile-based OLEDs with a multi-functional near-room-temperature encapsulation layer for smart e-textiles

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
So Yeong Jeong ◽  
Hye Rin Shim ◽  
Yunha Na ◽  
Ki Suk Kang ◽  
Yongmin Jeon ◽  
...  
Keyword(s):  
Room Temperature ◽  
Wearable Electronics ◽  
Ambient Conditions ◽  
Light Emitting ◽  
Stable Operating ◽  
Mechanical Durability ◽  
Potential Applications ◽  
Wearable Electronic ◽  
Data Signal ◽  
Wearable Electronic Devices

AbstractWearable electronic devices are being developed because of their wide potential applications and user convenience. Among them, wearable organic light emitting diodes (OLEDs) play an important role in visualizing the data signal processed in wearable electronics to humans. In this study, textile-based OLEDs were fabricated and their practical utility was demonstrated. The textile-based OLEDs exhibited a stable operating lifetime under ambient conditions, enough mechanical durability to endure the deformation by the movement of humans, and washability for maintaining its optoelectronic properties even in water condition such as rain, sweat, or washing. In this study, the main technology used to realize this textile-based OLED was multi-functional near-room-temperature encapsulation. The outstanding impermeability of TiO2 film deposited at near-room-temperature was demonstrated. The internal residual stress in the encapsulation layer was controlled, and the device was capped by highly cross-linked hydrophobic polymer film, providing a highly impermeable, mechanically flexible, and waterproof encapsulation.

Material and Configuration Design Strategies towards Flexible and Wearable Power Supply Devices: A Review

2021 ◽  
Author(s):  
Jiyuan Gao ◽  
Kezheng Shang ◽  
Yichun Ding ◽  
Zhenhai Wen
Keyword(s):  
Human Health ◽  
Health Monitoring ◽  
Power Supply ◽  
Wearable Sensors ◽  
Configuration Design ◽  
Design Strategies ◽  
Human Machine Interfaces

Flexible and wearable sensors have shown great potential in tremendous applications such as human health monitoring, smart robots, and human–machine interfaces, yet the lack of suitable flexible power supply devices...

Stretchable dual cross-linked silicon elastomer with superhydrophobic surface and fast triple self-healing ability at room temperature

Soft Matter ◽  
2021 ◽  
Author(s):  
Yuxing Shan ◽  
shuai liang ◽  
Xiangkai Mao ◽  
Jie Lu ◽  
Lili Liu ◽  
...  
Keyword(s):  
Superhydrophobic Surface ◽  
Room Temperature ◽  
Superhydrophobic Surfaces ◽  
Self Healing ◽  
Wearable Electronics ◽  
Actual Application ◽  
Potential Applications

Abstract. Stretchable elastomers with superhydrophobic surfaces have potential applications in wearable electronics. However, various types of damage inevitably occur on these elastomers in actual application, resulting in deterioration of the...

scholarly journals A Brief Review on Challenges in Design and Development of Nanorobots for Medical Applications

2021 ◽  
Vol 11 (21) ◽  
pp. 10385
Author(s):  
Gautham Giri ◽  
Yaser Maddahi ◽  
Kourosh Zareinia
Keyword(s):  
Drug Delivery ◽  
Human Health ◽  
Data Transmission ◽  
Medical Applications ◽  
Design And Development ◽  
Navigation Data ◽  
Innovative Idea ◽  
Potential Applications ◽  
Scale Down ◽  
Manufacturing Techniques

Robotics is a rapidly growing field, and the innovative idea to scale down the size of robots to the nanometer level has paved a new way of treating human health. Nanorobots have become the focus of many researchers aiming to explore their many potential applications in medicine. This paper focuses on manufacturing techniques involved in the fabrication of nanorobots and their associated challenges in terms of design architecture, sensors, actuators, powering, navigation, data transmission, followed by challenges in applications. In addition, an overview of various nanorobotic systems addresses different architectures of a nanorobot. Moreover, multiple medical applications, such as oncology, drug delivery, and surgery, are reviewed and summarized.

scholarly journals Durable Biopolymer Films From Lignin-Carbohydrate Complex Derived From a Pulp Mill Side Stream

2021 ◽  
Vol 9 ◽  
Author(s):  
Brita Asikanius ◽  
Anna-Stiina Jääskeläinen ◽  
Hanna Koivula ◽  
Petri Oinonen ◽  
Monika Österberg
Keyword(s):  
Materials Science ◽  
Composite Films ◽  
Pulp Mill ◽  
Industrial Applications ◽  
Hydroxyethyl Cellulose ◽  
Free Standing ◽  
Fractionation Process ◽  
Breaking Strain ◽  
Side Stream ◽  
Biomass Fractionation

Valorization of side streams offers novel types of raw materials to complement or replace synthetic and food-based alternatives in materials science, increasing profitability and decreasing the environmental impacts of biorefineries. Lignocellulose biomass contains lignin and carbohydrates that are covalently linked into lignin-carbohydrate complexes (LCCs). In biomass fractionation processes, these complexes are conventionally considered as waste, which hinders the biomass fractionation process, and they may solubilize into aqueous effluents. This study presents how LCCs, derived from pulp mill effluent, can be turned into valuable biopolymers for industrial polymer film applications. Free-standing composite films containing hydroxyethyl cellulose (HEC) and LCCs with varying molar mass, charge density and lignin/hemicellulose ratio were prepared to study the effect of LCC amount on mechanical properties and oxygen permeability. Increasing the LCC content increased the yield point and Young’s modulus of the films. Breaking strain measurements revealed a non-linear correlation with the LCC concentration for the samples with higher lignin than hemicellulose content. The addition of LCC enhanced oxygen barrier properties of HEC films significantly even at high relative humidity. The present research demonstrates how a currently underutilized fraction of the biorefinery side stream has the potential to be valorized as a biopolymer in industrial applications, for example as a barrier film for paper and board packaging.

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