scholarly journals Self-Healing Cellulose Nanocrystals-Containing Gels via Reshuffling of Thiuram Disulfide Bonds

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1392 ◽  
Author(s):  
Wenyan Li ◽  
Shengchang Lu ◽  
Mengchan Zhao ◽  
Xinxing Lin ◽  
Min Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Visible Light ◽  
Cellulose Nanocrystals ◽  
Disulfide Bonds ◽  
Self Healing ◽  
Engineering Applications ◽  
Original Length ◽  
Highly Stretchable

Self-healing gels based on reshuffling disulfide bonds have attracted great attention due to their ability to restore structure and mechanical properties after damage. In this work, self-healing gels with different cellulose nanocrystals (CNC) contents were prepared by embedding the thiuram disulfide bonds into gels via polyaddition. By the reshuffling of thiuram disulfide bonds, the CNC-containing gels repair the crack and recover mechanical properties rapidly under visible light in air. The thiuram disulfide-functionalized gels with a CNC content of 2.2% are highly stretchable and can be stretched approximately 42.6 times of their original length. Our results provide useful approaches for the preparation of dynamic CNC-containing gels with implications in many related engineering applications.

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.

scholarly journals Biocompatible Diselenide-Containing Protein Hydrogels with Effective Visible-Light-Initiated Self-Healing Properties

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4360
Author(s):  
Shengda Liu ◽  
Shengchao Deng ◽  
Tengfei Yan ◽  
Xin Zhang ◽  
Ruizhen Tian ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Schiff Base ◽  
Visible Light ◽  
Enzymatic Catalysis ◽  
Mechanical Damage ◽  
Covalent Bond ◽  
Light Response ◽  
Soft Materials ◽  
Self Healing ◽  
Protein Hydrogels

Smart hydrogels are typical functional soft materials, but their functional and mechanical properties are compromised upon micro- or macro-mechanical damage. In contrast, hydrogels with self-healing properties overcome this limitation. Herein, a dual dynamic bind, cross-linked, self-healing protein hydrogel is prepared, based on Schiff base bonds and diselenide bonds. The Schiff base bond is a typical dynamic covalent bond and the diselenide bond is an emerging dynamic covalent bond with a visible light response, which gives the resulting hydrogel a dual response in visible light and a desirable self-healing ability. The diselenide-containing protein hydrogels were biocompatible due to the fact that their main component was protein. In addition, the hydrogels loaded with glucose oxidase (GOx) could be transformed into sols in glucose solution due to the sensitive response of the diselenide bonds to the generated hydrogen peroxide (H2O2) by enzymatic catalysis. This work demonstrated a diselenide-containing protein hydrogel that could efficiently self-heal up to nearly 100% without compromising their mechanical properties under visible light at room temperature.

scholarly journals Liquid metal-tailored gluten network for protein-based e-skin

2021 ◽  
Author(s):  
Bin Chen ◽  
Yudong Cao ◽  
Zhuo Yan ◽  
Rui Liu ◽  
Yunjiao Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Disulfide Bonds ◽  
Protein Structures ◽  
Three Dimensional ◽  
Driving Mechanism ◽  
Self Healing ◽  
Structure Rearrangement ◽  
Electronic Skin ◽  
Regulation Method ◽  
Human Motions

Abstract Designing electronic skin (e-skin) with proteins is a critical way to endow e-skin with biocompatibility, but engineering protein structures to achieve controllable mechanical properties and self-healing ability remains a challenge. Here, we develop a hybrid gluten network through the incorporation of an eutectic gallium indium alloy (EGaIn) to design a self-healable e-skin with improved mechanical properties. The intrinsic reversible disulfide bonds/sulfhydryl groups reconfiguration of gluten networks is explored as a driving mechanism to introduce EGaIn as chemical cross-linkers to create hierarchical sulphur bonds, thus inducing the secondary structure rearrangement of gluten to form additional β-sheets as physical cross-linkers. Remarkably, this strategy allows the gluten network to realize a synthetic material-like stretchability (>1600%) and to endure a three-dimensional strain change. The obtained e-skin is biocompatible and biodegradable, and can sense strain changes from different scale human motions. The protein network micro-regulation method paves the way for future skin-like protein-based e-skin.

Double-crosslinked network design for self-healing, highly stretchable and resilient polymer hydrogels

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 12479-12485 ◽  
Author(s):  
Yinlei Lin ◽  
Deliu He ◽  
Zhifeng Chen ◽  
Liying Wang ◽  
Guangji Li
Keyword(s):  
Mechanical Properties ◽  
Network Design ◽  
Self Healing ◽  
Polymer Hydrogels ◽  
Highly Stretchable

A novel type of chemically and physically double-crosslinked network (CPDN) polymer hydrogels with excellent self-healing and mechanical properties were prepared and investigated.

Design of a mechanically strong and highly stretchable thermoplastic silicone elastomer based on coulombic interactions

2020 ◽  
Vol 8 (12) ◽  
pp. 5943-5951 ◽  
Author(s):  
Jinfeng Shi ◽  
Na Zhao ◽  
Dongying Yan ◽  
Jianhui Song ◽  
Wenxin Fu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicone Elastomer ◽  
Self Healing ◽  
Coulombic Interactions ◽  
Highly Stretchable

A thermoplastic silicone elastomer exclusively based on the salt-bonding between COOH and ZnO was successfully prepared, exhibiting excellent mechanical properties, high stretchability and temperature-assisted self-healing ability.

Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

2020 ◽  
Vol 11 (41) ◽  
pp. 6549-6558
Author(s):  
Yohei Miwa ◽  
Mayu Yamada ◽  
Yu Shinke ◽  
Shoichi Kutsumizu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Self Healing ◽  
High Modulus ◽  
Disordered Crystals ◽  
Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

scholarly journals Development of a 3D Printable and Highly Stretchable Ternary Organic-Inorganic Nanocomposite Hydrogel

2021 ◽  
Author(s):  
Chen Hu ◽  
Malik Haider ◽  
Lukas Hahn ◽  
Mengshi Yang ◽  
Robert Luxenhofer
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Nanocomposite Hydrogel ◽  
Highly Stretchable ◽  
Manufacturing Techniques ◽  
Advanced Applications

Hydrogels that can be processed with additive manufacturing techniques and concomitantly possess favorable mechanical properties are interesting for many advanced applications. However, the development of novel ink materials with high...

Polypyrrole/PU hybrid hydrogels: electrically conductive and fast self-healing for the potential application in body-monitor sensor

2021 ◽  
Author(s):  
Zhanyu Jia ◽  
Guangyao Li ◽  
Juan Wang ◽  
shouhua Su ◽  
Jie Wen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Potential Application ◽  
Self Healing ◽  
Electrically Conductive ◽  
Sensor Application ◽  
Hybrid Hydrogels ◽  
Health Monitor

Conductivity, self-healing and moderate mechanical properties are necessary for multifunctional hydrogels which have great potential in health-monitor sensor application. However, the combination of electrical conductivity, self-healing and good mechanical properties...

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