Ultra-fast preparation of multifunctional conductive hydrogels with high mechanical strength, self-healing and self-adhesive properties based on Tara Tannin-Fe3+ dynamic redox system for strain sensors applications

Polymer ◽  
2022 ◽  
pp. 124513
Author(s):  
Jiachang Liu ◽  
Song Bao ◽  
Qiangjun Ling ◽  
Xin Fan ◽  
Haibin Gu
Keyword(s):  
Mechanical Strength ◽  
Redox System ◽  
Strain Sensors ◽  
Self Healing ◽  
Adhesive Properties ◽  
High Mechanical Strength ◽  
Conductive Hydrogels

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

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

scholarly journals Highly Stretchable and Self-Healing Strain Sensors Based on Nanocellulose-Supported Graphene Dispersed in Electro-Conductive Hydrogels

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 937 ◽  
Author(s):  
Chunxiao Zheng ◽  
Yiying Yue ◽  
Lu Gan ◽  
Xinwu Xu ◽  
Changtong Mei ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Cellulose Nanofibers ◽  
Strain Sensors ◽  
Gauge Factor ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Composite Gels ◽  
Highly Stretchable ◽  
Conductive Hydrogels ◽  
Pva Hydrogel

Intrinsic self-healing and highly stretchable electro-conductive hydrogels demonstrate wide-ranging utilization in intelligent electronic skin. Herein, we propose a new class of strain sensors prepared by cellulose nanofibers (CNFs) and graphene (GN) co-incorporated poly (vinyl alcohol)-borax (GN-CNF@PVA) hydrogel. The borax can reversibly and dynamically associate with poly (vinyl alcohol) (PVA) and GN-CNF nanocomplexes as a cross-linking agent, providing a tough and flexible network with the hydrogels. CNFs act as a bio-template and dispersant to support GN to create homogeneous GN-CNF aqueous dispersion, endowing the GN-CNF@PVA gels with promoted mechanical flexibility, strength and good conductivity. The resulting composite gels have high stretchability (break-up elongation up to 1000%), excellent viscoelasticity (storage modulus up to 3.7 kPa), rapid self-healing ability (20 s) and high healing efficiency (97.7 ± 1.2%). Due to effective electric pathways provided by GN-CNF nanocomplexes, the strain sensors integrated by GN-CNF@PVA hydrogel with good responsiveness, stability and repeatability can efficiently identify and monitor the various human motions with the gauge factor (GF) of about 3.8, showing promising applications in the field of wearable sensing devices.

Biocompatible Autonomic Self‐healing PVA‐TA Hydrogel with High Mechanical Strength

2021 ◽  
pp. 2100061
Author(s):  
Jinxin Huang ◽  
Chengwei Wu ◽  
Xiaogang Yu ◽  
Heng Li ◽  
Shuaiwen Ding ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Self Healing ◽  
High Mechanical Strength
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