Salt-Mediated Polyampholyte Hydrogels with High Mechanical Strength, Excellent Self-Healing Property, and Satisfactory Electrical Conductivity

2018 ◽  
Vol 28 (44) ◽  
pp. 1804416 ◽  
Author(s):  
Tangjie Long ◽  
Yixuan Li ◽  
Xu Fang ◽  
Junqi Sun
Keyword(s):  
Electrical Conductivity ◽  
Mechanical Strength ◽  
Self Healing ◽  
High Mechanical Strength ◽  
Healing Property

scholarly journals Dynamic Nanohybrid-Polysaccharide Hydrogels for Soft Wearable Strain Sensing

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3574
Author(s):  
Pejman Heidarian ◽  
Hossein Yousefi ◽  
Akif Kaynak ◽  
Mariana Paulino ◽  
Saleh Gharaie ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Strain Sensors ◽  
Self Healing ◽  
Nano Materials ◽  
Strain Sensing ◽  
Ferric Ions ◽  
Research Activity ◽  
Adhesion Properties ◽  
High Mechanical Strength ◽  
The Moment

Electroconductive hydrogels with stimuli-free self-healing and self-recovery (SELF) properties and high mechanical strength for wearable strain sensors is an area of intensive research activity at the moment. Most electroconductive hydrogels, however, consist of static bonds for mechanical strength and dynamic bonds for SELF performance, presenting a challenge to improve both properties into one single hydrogel. An alternative strategy to successfully incorporate both properties into one system is via the use of stiff or rigid, yet dynamic nano-materials. In this work, a nano-hybrid modifier derived from nano-chitin coated with ferric ions and tannic acid (TA/Fe@ChNFs) is blended into a starch/polyvinyl alcohol/polyacrylic acid (St/PVA/PAA) hydrogel. It is hypothesized that the TA/Fe@ChNFs nanohybrid imparts both mechanical strength and stimuli-free SELF properties to the hydrogel via dynamic catecholato-metal coordination bonds. Additionally, the catechol groups of TA provide mussel-inspired adhesion properties to the hydrogel. Due to its electroconductivity, toughness, stimuli-free SELF properties, and self-adhesiveness, a prototype soft wearable strain sensor is created using this hydrogel and subsequently tested.

A room-temperature self-healing elastomer with ultra-high strength and toughness fabricated via optimized hierarchical hydrogen-bonding interactions

2022 ◽  
Author(s):  
Liangliang Xia ◽  
Ming Zhou ◽  
Hongjun Tu ◽  
wen Zeng ◽  
xiaoling Yang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Mechanical Strength ◽  
Room Temperature ◽  
Polymeric Materials ◽  
High Strength ◽  
Self Healing ◽  
High Mechanical Strength ◽  
Hydrogen Bonding Interactions ◽  
Healing Efficiency ◽  
Good Healing

The preparation of room-temperature self-healing polymeric materials with good healing efficiency and high mechanical strength is challenging. Two processes are essential to realise the room-temperature self-healing of materials: (a) a...

Self-healable gradient copolymers

2019 ◽  
Vol 3 (3) ◽  
pp. 464-471 ◽  
Author(s):  
Jing Cui ◽  
Zhe Ma ◽  
Li Pan ◽  
Chun-Hua An ◽  
Jing Liu ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Ionic Interactions ◽  
Self Healing ◽  
Gradient Copolymers ◽  
High Mechanical Strength ◽  
Gradient Distribution

Synergistic hard/soft gradient distribution and dynamic ionic interactions impart high mechanical strength, toughness, stretchability and tenacious self-healing ability to copolymers.

Melt-Processable Shape-Memory Hydrogels with Self-Healing Ability of High Mechanical Strength

2016 ◽  
Vol 49 (19) ◽  
pp. 7442-7449 ◽  
Author(s):  
Cigdem Bilici ◽  
Volkan Can ◽  
Ulrich Nöchel ◽  
Marc Behl ◽  
Andreas Lendlein ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Shape Memory ◽  
Self Healing ◽  
High Mechanical Strength

scholarly journals Ionic Conductive Organohydrogel With Ultrastretchability, Self-Healable and Freezing-Tolerant Properties for Wearable Strain Sensor

2021 ◽  
Vol 9 ◽  
Author(s):  
Feng Ji ◽  
Min Jiang ◽  
Qingyu Yu ◽  
Xuefang Hao ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Large Scale ◽  
Strain Sensor ◽  
Fast Response ◽  
Self Healing ◽  
One Pot ◽  
High Mechanical Strength ◽  
Flexible Sensors ◽  
Healing Property ◽  
Human Motions ◽  
Huge Challenge

Currently, stretchable hydrogel has attracted great attention in the field of wearable flexible sensors. However, fabricating flexible hydrogel sensor simultaneously with superstretchability, high mechanical strength, remarkable self-healing ability, excellent anti-freezing and sensing features via a facile method remains a huge challenge. Herein, a fully physically linked poly(hydroxyethyl acrylamide)-gelatin-glycerol-lithium chloride (PHEAA-GE-Gl-LiCl) double network organohydrogel is prepared via a simple one-pot heating-cooling-photopolymerization method. The prepared PHEAA-GE-Gl-LiCl organohydrogel exhibits favorable stretchability (970%) and remarkable self-healing property. Meanwhile, due to the presence of glycerol and LiCl, the PHEAA-GE-Gl-LiCl organohydrogel possesses outstanding anti-freezing capability, it can maintain excellent stretchability (608%) and conductivity (0.102 S/m) even at −40°C. In addition, the PHEAA-GE-Gl-LiCl organohydrogel-based strain sensor is capable of repeatedly and stably detecting and monitoring both large-scale human motions and subtle physiological signals in a wide temperature range (from −40°C to 25°C). More importantly, the PHEAA-GE-Gl-LiCl organohydrogel-based sensor displays excellent strain sensitivity (GF = 13.16 at 500% strain), fast response time (300 ms), and outstanding repeatability. Based on these super characteristics, it is envisioned that PHEAA-GE-Gl-LiCl organohydrogel holds promising potentials as wearable strain sensor.

Polyelectrolyte complex-based self-healing, fatigue-resistant and anti-freezing hydrogels as highly sensitive ionic skins

2020 ◽  
Vol 8 (7) ◽  
pp. 3667-3675 ◽  
Author(s):  
Siheng Li ◽  
Hongyu Pan ◽  
Yuting Wang ◽  
Junqi Sun
Keyword(s):  
Mechanical Strength ◽  
Polyelectrolyte Complex ◽  
Mechanical Damage ◽  
High Sensitivity ◽  
Self Healing ◽  
High Mechanical Strength ◽  
Highly Sensitive ◽  
Sensing Performance

Hydrogel-based self-healing ionic skins possess high mechanical strength, excellent resilience, anti-freezing properties and high sensitivity and can heal fatigue and mechanical damage to restore the original sensing performance.

scholarly journals A Rapidly Self-Healing Host-Guest Supramolecular Hydrogel with High Mechanical Strength and Excellent Biocompatibility

2018 ◽  
Vol 57 (29) ◽  
pp. 9008-9012 ◽  
Author(s):  
Zhifang Wang ◽  
Yipeng Ren ◽  
Ye Zhu ◽  
Lijing Hao ◽  
Yunhua Chen ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Self Healing ◽  
Supramolecular Hydrogel ◽  
High Mechanical Strength
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