A self-healing elastomer based on an intrinsic non-covalent cross-linking mechanism

2019 ◽  
Vol 7 (25) ◽  
pp. 15207-15214 ◽  
Author(s):  
Jun Chen ◽  
Fanzhu Li ◽  
Yanlong Luo ◽  
Yijun Shi ◽  
Xiaofeng Ma ◽  
...  
Keyword(s):  
Cross Linking ◽  
Self Healing ◽  
Characterization Methods ◽  
New Approaches ◽  
Noncovalent Bonds

Introduction to new approaches to self-healing, proper characterization methods for dynamic noncovalent bonds, and demonstration of simulations.

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.

An injectable and self-healing hydrogel with covalent cross-linking in vivo for cranial bone repair

2017 ◽  
Vol 5 (20) ◽  
pp. 3739-3748 ◽  
Author(s):  
Shaoyu Lü ◽  
Xiao Bai ◽  
Haidi Liu ◽  
Piao Ning ◽  
Zengqiang Wang ◽  
...  
Keyword(s):  
Click Chemistry ◽  
Bone Repair ◽  
Cranial Bone ◽  
Cross Linking ◽  
Self Healing

DA click chemistry and dynamic acylhydrazone bond cross-linking are employed to obtain injectable and self-healing hydrogels for cranial bone repair.

A facile cross-linking approach to fabricate durable and self-healing superhydrophobic coatings of SiO2-PVA@PDMS on cotton textile

2020 ◽  
Vol 134 ◽  
pp. 109836 ◽  
Author(s):  
Nahar Jannatun ◽  
A. Taraqqi-A-Kamal ◽  
Ratul Rehman ◽  
Joan Kuker ◽  
Sudip Kumar Lahiri
Keyword(s):  
Cross Linking ◽  
Cotton Textile ◽  
Self Healing ◽  
Superhydrophobic Coatings

A novel transparent luminous hydrogel with self-healing property

2017 ◽  
Vol 5 (29) ◽  
pp. 5738-5744 ◽  
Author(s):  
Hui Zhi ◽  
Xu Fei ◽  
Jing Tian ◽  
Muzi Jing ◽  
Longquan Xu ◽  
...  
Keyword(s):  
Boric Acid ◽  
Cross Linking ◽  
Self Healing ◽  
Healing Property

A Luminous hydrogel with self-healing properties and biocompatibility was synthesized by a Eu-containing PVA with boric acid as a cross-linking agent.

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.

Design of Self-Healing Rubber by Introducing Ionic Interaction To Construct a Network Composed of Ionic and Covalent Cross-Linking

2019 ◽  
Vol 58 (32) ◽  
pp. 14848-14858 ◽  
Author(s):  
Yong Liu ◽  
Zhaolei Li ◽  
Rongjuan Liu ◽  
Zhaopeng Liang ◽  
Jun Yang ◽  
...  
Keyword(s):  
Cross Linking ◽  
Self Healing ◽  
Ionic Interaction

scholarly journals Preparation and Characterization of Ethylenediamine-Polyurea Microcapsule Epoxy Self-Healing Coating

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 326 ◽  
Author(s):  
Yanxuan Ma ◽  
Yingrui Zhang ◽  
Jiatong Liu ◽  
Yi Sun ◽  
Yajie Ge ◽  
...  
Keyword(s):  
Electrochemical Impedance ◽  
Spherical Shape ◽  
Core Material ◽  
Self Healing ◽  
Characterization Methods ◽  
Chemical Structures ◽  
Size And Morphology ◽  
Eis Measurements ◽  
External Corrosion ◽  
The Fourier Transform

Polyurea microcapsules with Ethylenediamine (EDA) as the core material were synthesized. A set of characterization methods, including optical and scanning electron microscopy (OM and SEM), the Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) were used to confirm the microcapsule morphology and chemical structures. The influence of emulsifier content and stirring rate on size and morphology of the microcapsules was investigated, and the self-healing performance of EDA-Polyurea microcapsule/epoxy coatings was evaluated by electrochemical impedance spectroscopy (EIS) measurements. The results showed that the microcapsules obtained had good spherical shape with a mean diameter of 0.54–0.70 μm. Compared with pure core material, the microcapsule showed excellent thermostability, and the content of core materials was up to 56.00 wt%. The epoxy coating with 5.0 wt% EDA-Polyurea microcapsules achieved average corrosion resistance efficiencies of 90.00%, significantly enhancing the capability of the scratched coating to resist external corrosion.

scholarly journals Glycan-decorated protocells: novel features for rebuilding cellular processes

2019 ◽  
Vol 9 (2) ◽  
pp. 20180084 ◽  
Author(s):  
Ramin Omidvar ◽  
Winfried Römer
Keyword(s):  
Synthetic Biology ◽  
Membrane Fusion ◽  
Molecular Mechanisms ◽  
Lipid Vesicles ◽  
Cross Linking ◽  
Membrane Systems ◽  
Biophysical Characterization ◽  
Characterization Methods ◽  
Cellular Processes ◽  
Shed Light

In synthetic biology approaches, lipid vesicles are widely used as protocell models. While many compounds have been encapsulated in vesicles (e.g. DNA, cytoskeleton and enzymes), the incorporation of glycocalyx components in the lipid bilayer has attracted much less attention so far. In recent years, glycoconjugates have been integrated in the membrane of giant unilamellar vesicles (GUVs). These minimal membrane systems have largely contributed to shed light on the molecular mechanisms of cellular processes. In this review, we first introduce several preparation and biophysical characterization methods of GUVs. Then, we highlight specific applications of protocells investigating glycolipid-mediated endocytosis of toxins, viruses and bacteria. In addition, we delineate how prototissues have been assembled from glycan-decorated protocells by using lectin-mediated cross-linking of opposed glycoreceptors (e.g. glycolipids and glycopeptides). In future applications, glycan-decorated protocells might be useful for investigating cell–cell interactions (e.g. adhesion and communication). We also speculate about the implication of lectin–glycoreceptor interactions in membrane fusion processes.

Self-healing hydrogel with cross-linking induced thermo-response regulated light emission property

2019 ◽  
Vol 183 ◽  
pp. 110441 ◽  
Author(s):  
Fangjie Hou ◽  
Baozhong Xi ◽  
Xuemeng Wang ◽  
Yan Yang ◽  
Haifeng Zhao ◽  
...  
Keyword(s):  
Light Emission ◽  
Emission Property ◽  
Cross Linking ◽  
Self Healing
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