scholarly journals All‐Around Universal and Photoelastic Self‐Healing Elastomer with High Toughness and Resilience (Adv. Sci. 24/2021)

2021 ◽  
Vol 8 (24) ◽  
pp. 2170161
Author(s):  
Jarkko Tolvanen ◽  
Mikko Nelo ◽  
Jari Hannu ◽  
Jari Juuti ◽  
Heli Jantunen
Keyword(s):  
Self Healing ◽  
High Toughness

scholarly journals Ultrarobust, tough and highly stretchable self-healing materials based on cartilage-inspired noncovalent assembly nanostructure

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuyan Wang ◽  
Xin Huang ◽  
Xinxing Zhang
Keyword(s):  
Spider Silk ◽  
Self Healing ◽  
High Toughness ◽  
Healing Efficiency ◽  
Strong Interfacial Interaction ◽  
Highly Stretchable ◽  
Noncovalent Bonds ◽  
Actuation Devices ◽  
Noncovalent Bonding ◽  
Polyurethane Matrix

AbstractSelf-healing materials integrated with excellent mechanical strength and simultaneously high healing efficiency would be of great use in many fields, however their fabrication has been proven extremely challenging. Here, inspired by biological cartilage, we present an ultrarobust self-healing material by incorporating high density noncovalent bonds at the interfaces between the dentritic tannic acid-modified tungsten disulfide nanosheets and polyurethane matrix to collectively produce a strong interfacial interaction. The resultant nanocomposite material with interwoven network shows excellent tensile strength (52.3 MPa), high toughness (282.7 MJ m‒3, which is 1.6 times higher than spider silk and 9.4 times higher than metallic aluminum), high stretchability (1020.8%) and excellent healing efficiency (80–100%), which overturns the previous understanding of traditional noncovalent bonding self-healing materials where high mechanical robustness and healing ability are mutually exclusive. Moreover, the interfacical supramolecular crosslinking structure enables the functional-healing ability of the resultant flexible smart actuation devices. This work opens an avenue toward the development of ultrarobust self-healing materials for various flexible functional devices.

Extremely Tough and Healable Elastomer Realized via Reducing the Crystallinity of Rigid Domain

2021 ◽  
Author(s):  
Chong Xing ◽  
Haomin Wu ◽  
Ruichun Du ◽  
Qiuhong Zhang ◽  
Xudong Jia
Keyword(s):  
Metal Ions ◽  
Self Healing ◽  
High Toughness

We propose a new concept of “toughening the rigid” by adding metal ions to sacrifice the crystallinity of the rigid domain, which makes the elastomers with high toughness and self-healing...

Photocurable 3D Printing of High Toughness and Self‐Healing Hydrogels for Customized Wearable Flexible Sensors

2021 ◽  
pp. 2107202
Author(s):  
Yuchao Wu ◽  
Yong Zeng ◽  
Yizhen Chen ◽  
Chao Li ◽  
Renhui Qiu ◽  
...  
Keyword(s):  
3D Printing ◽  
Self Healing ◽  
Flexible Sensors ◽  
High Toughness

Ultrarobust, tough and highly stretchable self-healing materials based on cartilage-inspired noncovalent assembly nanostructure

2020 ◽  
Author(s):  
Yuyan Wang ◽  
Xin Huang ◽  
Xinxing Zhang
Keyword(s):  
Spider Silk ◽  
Interfacial Interaction ◽  
Self Healing ◽  
Flexible Devices ◽  
High Toughness ◽  
Healing Efficiency ◽  
Strong Interfacial Interaction ◽  
Highly Stretchable ◽  
Noncovalent Bonds ◽  
Noncovalent Bonding

Abstract Self-healing materials integrated with robust mechanical strength and high healing efficiency simultaneously would be of great use in many fields but have been proven to be extremely challenging. Here, inspired by animal cartilage, we present a ultrarobust self-healing material by incorporating high density noncovalent bonds at interface between the assembled interwoven network of two-dimensional nanosheets and polymer matrix to collectively produce a strong interfacial interaction. The resulted nanocomposite material shows robust tensile strength (52.3 MPa), high toughness (282.7 MJ m–3, which is 1.6 times higher than spider silk and 9.4 times higher than metallic aluminum), high stretchability (1020.8%) and excellent healing efficiency (80-100%), which overturns previous understanding of the traditional noncovalent bonding self-healing materials that high mechanical robustness and healing ability tend to be mutually exclusive. Moreover, the interfacical supramolecular crosslinking structure enables the functional-healing ability of the resultant flexible devices. This work opens an avenue toward the development of ultrarobust self-healing materials for various flexible functional devices.

Bio-based, Robust, Shape Memory, Self-Healing and Recyclable Elastomer Based on Semi-interpenetrating Dynamic Network

2021 ◽  
Author(s):  
Xin Qi ◽  
Jichuan Zhang ◽  
Liqun Zhang ◽  
Dongmei Yue
Keyword(s):  
Shape Memory ◽  
Dynamic Network ◽  
Self Healing ◽  
High Toughness

Fabricating materials with a combination of high toughness, self-healing, shape memory and reprocessing properties, especially derived from renewable precursors, remains a challenge. Herein, we demonstrate a simple way to prepare...

Polypyrrole-Doped Conductive Self-Healing Composite Hydrogels with High Toughness and Stretchability

2021 ◽  
Vol 22 (3) ◽  
pp. 1273-1281
Author(s):  
Lingling Zhao ◽  
Xin Li ◽  
Yan Li ◽  
Xuemiao Wang ◽  
Wu Yang ◽  
...  
Keyword(s):  
Self Healing ◽  
Composite Hydrogels ◽  
High Toughness

Self-Healing Properties of Ultra-High Toughness Fly Ash Based Geopolymer under Air and Water Environments

2021 ◽  
Vol 1036 ◽  
pp. 214-222
Author(s):  
Jia Bao Huang ◽  
Gui Yan Xiong ◽  
Xiao Lu Guo
Keyword(s):  
Fly Ash ◽  
Tensile Stress ◽  
Water Absorption ◽  
Water Environment ◽  
The Self ◽  
Self Healing ◽  
Curing Conditions ◽  
High Toughness ◽  
The Matrix ◽  
Fiber Matrix Interface

The self-healing properties of ultra-high toughness fly ash based geopolymer curing in air and water were studied under 2% pre-tension strain. The experimental results show that under these two curing conditions the tensile stress and water absorption of FA-EGC have been recovered and the pore structure has also been improved, indicating that self-healing has taken place in the specimens. Compared to the air environment, the water environment is proved to be a better environment for the self-healing of FA-EGC. It was observed that there were unreacted fly ash particles at the cracks through SEM. And more N-A-S-H gels were found under the water environment, indicating that N-A-S-H gels may enhance the fiber/matrix interface and improve the density of the matrix, resulting in the higher recovery of tensile stress and water absorption.

Imidazolium-based ionic polyurethanes with high toughness, tunable healing efficiency and antibacterial activities

2020 ◽  
Vol 11 (4) ◽  
pp. 867-875 ◽  
Author(s):  
Ning Duan ◽  
Zhe Sun ◽  
Yongyuan Ren ◽  
Ziyang Liu ◽  
Lili Liu ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Shape Memory ◽  
Antibacterial Activities ◽  
Self Healing ◽  
High Toughness ◽  
Healing Efficiency

Ionic polyurethanes (PUs) with high toughness, fast self-healing ability, antibacterial activity and shape memory behaviors are synthesized.

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