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.

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.

scholarly journals A Self-Healing Polymer with Fast Elastic Recovery upon Stretching

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 597 ◽  
Author(s):  
Pei-Chen Zhao ◽  
Wen Li ◽  
Wei Huang ◽  
Cheng-Hui Li
Keyword(s):  
Room Temperature ◽  
Elastic Recovery ◽  
Self Healing ◽  
Original Length ◽  
Healing Efficiency ◽  
Recovery Behavior ◽  
Long Time ◽  
Highly Stretchable ◽  
Soft Actuators

The design of polymers that exhibit both good elasticity and self-healing properties is a highly challenging task. In spite of this, the literature reports highly stretchable self-healing polymers, but most of them exhibit slow elastic recovery behavior, i.e., they can only recover to their original length upon relaxation for a long time after stretching. Herein, a self-healing polymer with a fast elastic recovery property is demonstrated. We used 4-[tris(4-formylphenyl)methyl]benzaldehyde (TFPM) as a tetratopic linker to crosslink a poly(dimethylsiloxane) backbone, and obtained a self-healing polymer with high stretchability and fast elastic recovery upon stretching. The strain at break of the as-prepared polymer is observed at about 1400%. The polymer can immediately recover to its original length after being stretched. The damaged sample can be healed at room temperature with a healing efficiency up to 93% within 1 h. Such a polymer can be used for various applications, such as functioning as substrates or matrixes in soft actuators, electronic skins, biochips, and biosensors with prolonged lifetimes.

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.

scholarly journals A Heterocyclic Polyurethane with Enhanced Self-Healing Efficiency and Outstanding Recovery of Mechanical Properties

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 968
Author(s):  
Jinsil Kim ◽  
Pyong Hwa Hong ◽  
Kiwon Choi ◽  
Gyeongmin Moon ◽  
Jungsoon Kang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Healing Process ◽  
Supramolecular Network ◽  
Hydroxyl Groups ◽  
Self Healing ◽  
Healing Efficiency ◽  
Bonding Interaction ◽  
Heterocyclic Group ◽  
Polyurethane Matrix ◽  
Strong Hydrogen Bonding Interaction

A functional polyurethane based on the heterocyclic group was synthesized and its self-healing and mechanical properties were examined. To synthesize a heterocyclic polyurethane, a polyol and a heterocyclic compound with di-hydroxyl groups at both ends were blended and the blended solution was reacted with a crosslinker containing multiple isocyanate groups. The heterocyclic polyurethane demonstrates better self-healing efficiency than the conventional polyurethane with no heterocyclic groups. Furthermore, unlike the conventional self-healing materials, the heterocyclic polyurethane examined in this study shows an outstanding recovery of the mechanical properties after the self-healing process. These results are attributed to the unique supramolecular network resulting from the strong hydrogen bonding interaction between the urethane group and the heterocyclic group in the heterocyclic polyurethane matrix.

Highly stretchable and autonomously healable epidermal sensor based on multi-functional hydrogel frameworks

2019 ◽  
Vol 7 (11) ◽  
pp. 5949-5956 ◽  
Author(s):  
Gang Ge ◽  
Wei Yuan ◽  
Wen Zhao ◽  
Yao Lu ◽  
Yizhou Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Tolerance ◽  
Self Healing ◽  
Flexible Sensor ◽  
Low Temperature Tolerance ◽  
Healing Efficiency ◽  
Highly Stretchable ◽  
Human Motions

A flexible sensor was prepared based on multi-functional hydrogel, which behaved remarkable stretchability, high self-healing efficiency and low temperature tolerance. Various human motions can also be discerned.

High‐toughness Spider Silk Fibers Spun from Soluble Recombinant Silk Produced in Mammalian Cells

2003 ◽  
Author(s):  
Costas N. Karatzas ◽  
Nathalie Chretien ◽  
François Duguay ◽  
Annie Bellemare ◽  
Jiang Feng Zhou ◽  
...  
Keyword(s):  
Mammalian Cells ◽  
Spider Silk ◽  
Silk Fibers ◽  
High Toughness

A Highly Stretchable, Self-Healing Elastomer with Rate Sensing Capability Based on a Dynamic Dual Network

2021 ◽  
Vol 13 (7) ◽  
pp. 9043-9052
Author(s):  
Peiyao Qu ◽  
Chi Lv ◽  
Yuhao Qi ◽  
Lu Bai ◽  
Junping Zheng
Keyword(s):  
Self Healing ◽  
Highly Stretchable

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...

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