Design of Self-healing Polymers and High Value-added Urethane-containing Rubber Materials Based on Dynamic Covalent Chemistry

2021 ◽  
Vol 94 (2) ◽  
pp. 33-38
Author(s):  
Hideyuki Hideyuki OTSUKA ◽  
Daisuke AOKI ◽  
Yasuhiro SHODA ◽  
Katsuhiko TSUNODA
Keyword(s):  
Value Added ◽  
Self Healing ◽  
Dynamic Covalent Chemistry

Synthesis of a polyacrylamide hydrogel using CO2 at room temperature

2020 ◽  
Vol 98 (2) ◽  
pp. 66-73 ◽  
Author(s):  
Celia Ferrag ◽  
Maryam Abdinejad ◽  
Kagan Kerman
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Value Added ◽  
Ionization Mass ◽  
Self Healing ◽  
The Novel ◽  
Polyacrylamide Hydrogel ◽  
Ambient Conditions ◽  
Novel Approach ◽  
Transmission Electron

Carbon dioxide (CO2) is an environmentally harmful “greenhouse gas” that is present in abundant quantities in the earth’s atmosphere. Thus, the sequestration and conversion of CO2 to value-added organic chemicals is of environmental and economical importance. In this proof-of-concept study, amine groups of acrylamide compounds were found to react with CO2 under ambient conditions to form a polyacrylamide hydrogel. This composite was characterized using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR) and electrospray ionization mass spectrometry (ESI–MS), which confirmed successful synthesis and demonstrated all characteristics representative of a typical hydrogel material. Rheology analyses further proved the formation of the hydrogel, as well as its self-healing nature. The novel approach proposed in this work can potentially be used in the construction of versatile amine-based gel materials for efficient CO2 utilization applications.

Ultra elastic, stretchable, self-healing conductive hydrogels with tunable optical properties for highly sensitive soft electronic sensors

2020 ◽  
Vol 8 (46) ◽  
pp. 24718-24733
Author(s):  
Meng Wu ◽  
Jingsi Chen ◽  
Yuhao Ma ◽  
Bin Yan ◽  
Mingfei Pan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Human Activities ◽  
Ionic Conductor ◽  
Self Healing ◽  
Dynamic Covalent Chemistry ◽  
Highly Sensitive ◽  
Tunable Optical Properties ◽  
Conductive Hydrogels ◽  
Electronic Sensors

A self-healing hydrogel ionic conductor has been developed by combining dynamic covalent chemistry with nanofiller reinforcement and micelle crosslinking, and used for sensing of diverse human activities.

Ultra-fast self-healing PVA organogels based on dynamic covalent chemistry for dye selective adsorption

2019 ◽  
Vol 43 (20) ◽  
pp. 7701-7707 ◽  
Author(s):  
Shujing Ren ◽  
Panpan Sun ◽  
Aoli Wu ◽  
Na Sun ◽  
Lixin Sun ◽  
...  
Keyword(s):  
Methylene Blue ◽  
High Efficiency ◽  
Selective Adsorption ◽  
Self Healing ◽  
Dynamic Covalent Chemistry

Organogels can repair the damage rapidly, and the relative xerogels can adsorb methylene blue with high efficiency.

scholarly journals Investigating the Self-Healing of Dynamic Covalent Thermoset Polyimine and Its Nanocomposites

2019 ◽  
Vol 86 (10) ◽  
Author(s):  
Chuanqian Shi ◽  
Zhanan Zou ◽  
Zepeng Lei ◽  
Xingli Wu ◽  
Zhengwei Liu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Shear Strength ◽  
Environmental Pollution ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
The Self ◽  
Self Healing ◽  
Dynamic Covalent Chemistry ◽  
Healing Effect ◽  
Press Time

Self-healable and recyclable materials and electronics can improve the reliability and repairability and can reduce environmental pollution; therefore, they promise very broad applications. In this study, we investigated the self-healing performance of dynamic covalent thermoset polyimine and its nanocomposites based on the dynamic covalent chemistry. Heat press was applied to two laminating films of polyimine and its nanocomposites to induce self-healing. The effects of heat press time, temperature, and load on the interfacial shear strength of the rehealed films were investigated. The results showed that increasing the heat press time, temperature, and load can significantly improve the interfacial shear strength and thus the self-healing effect. For polyimine nanocomposites, increasing the heat press time, temperature, and load led to the improved electrical conductivity of the rehealed films.

scholarly journals Bioinspired Self-Healing Hydrogel Based on Benzoxaborole-Catechol Dynamic Covalent Chemistry for 3D Cell Encapsulation

2018 ◽  
Vol 7 (8) ◽  
pp. 904-908 ◽  
Author(s):  
Yangjun Chen ◽  
Diana Diaz-Dussan ◽  
Di Wu ◽  
Wenda Wang ◽  
Yi-Yang Peng ◽  
...  
Keyword(s):  
Cell Encapsulation ◽  
Self Healing ◽  
Dynamic Covalent Chemistry

scholarly journals Self-Healing Injectable Polymer Hydrogel via Dynamic Thiol-Alkynone Double Addition Crosslinks

2020 ◽  
Author(s):  
bowen fan ◽  
Kai Zhang ◽  
Qian Liu ◽  
Rienk Eelkema
Keyword(s):  
Polymer Network ◽  
Star Polymer ◽  
Cytotoxicity Test ◽  
Self Healing ◽  
Polymer Hydrogel ◽  
Dynamic Covalent Chemistry ◽  
Hydrogel Network ◽  
New Type ◽  
Aqueous Conditions ◽  
Injectable Polymer

<p>Introduction of dynamic thiol-alkynone double addition crosslinks in a polymer network enable the formation of a self-healing injectable polymer hydrogel. A 4-arm polyethylene glycol (PEG) tetra-thiol star polymer is crosslinked by a small molecule alkynone via the thiol-alkynone double adduct, to generate a hydrogel network under ambient aqueous conditions (buffer pH=7.4 or 8.2, room temperature). The mechanical properties of these hydrogels can be easily tuned by varying the concentration of polymer precursors. Through the dynamic thiol-alkynone double addition crosslink, these hydrogels are self-healing and shear thinning, as demonstrated by rheological measurements, macroscopic self-healing and injection tests. These hydrogels can be injected through a 20G syringe needle and recover after extrusion. In addition, good cytocompatibility of these hydrogels is confirmed by cytotoxicity test. This work shows the application of a new type of dynamic covalent chemistry in the straightforward preparation of self-healing injectable hydrogels, which may find future biomedical applications such as tissue engineering and drug delivery.</p>

scholarly journals Self-Healing Injectable Polymer Hydrogel via Dynamic Thiol-Alkynone Double Addition Crosslinks

2020 ◽  
Author(s):  
bowen fan ◽  
Kai Zhang ◽  
Qian Liu ◽  
Rienk Eelkema
Keyword(s):  
Polymer Network ◽  
Star Polymer ◽  
Cytotoxicity Test ◽  
Self Healing ◽  
Polymer Hydrogel ◽  
Dynamic Covalent Chemistry ◽  
Hydrogel Network ◽  
New Type ◽  
Aqueous Conditions ◽  
Injectable Polymer

<p>Introduction of dynamic thiol-alkynone double addition crosslinks in a polymer network enable the formation of a self-healing injectable polymer hydrogel. A 4-arm polyethylene glycol (PEG) tetra-thiol star polymer is crosslinked by a small molecule alkynone via the thiol-alkynone double adduct, to generate a hydrogel network under ambient aqueous conditions (buffer pH=7.4 or 8.2, room temperature). The mechanical properties of these hydrogels can be easily tuned by varying the concentration of polymer precursors. Through the dynamic thiol-alkynone double addition crosslink, these hydrogels are self-healing and shear thinning, as demonstrated by rheological measurements, macroscopic self-healing and injection tests. These hydrogels can be injected through a 20G syringe needle and recover after extrusion. In addition, good cytocompatibility of these hydrogels is confirmed by cytotoxicity test. This work shows the application of a new type of dynamic covalent chemistry in the straightforward preparation of self-healing injectable hydrogels, which may find future biomedical applications such as tissue engineering and drug delivery.</p>

Strong, self‐healing gelatin hydrogels cross‐linked by double dynamic covalent chemistry

ChemPlusChem ◽  
2021 ◽  
Author(s):  
Ye Zhang ◽  
Qimeng Wang ◽  
Ziyan Wang ◽  
Difei Zhang ◽  
Jieyu Gu ◽  
...  
Keyword(s):  
Self Healing ◽  
Dynamic Covalent Chemistry

scholarly journals Self-healing alginate–gelatin biohydrogels based on dynamic covalent chemistry: elucidation of key parameters

2017 ◽  
Vol 1 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Asja Pettignano ◽  
Marleen Häring ◽  
Luca Bernardi ◽  
Nathalie Tanchoux ◽  
Françoise Quignard ◽  
...  
Keyword(s):  
The Self ◽  
Self Healing ◽  
Dynamic Covalent Chemistry

Key parameters that govern the self-healing character of alginate–gelatin biohydrogels based on dynamic covalent chemistry have been elucidated.

Self-healing, recyclable, and shape memory UV-curable coatings derived from tung oil and malic acid

2021 ◽  
Author(s):  
Jinshuai Zhang ◽  
Jia Huang ◽  
Guoqiang Zhu ◽  
Xixi Yu ◽  
Jianwen Cheng ◽  
...  
Keyword(s):  
Shape Memory ◽  
Malic Acid ◽  
Renewable Resources ◽  
Microwave Assisted Synthesis ◽  
Self Healing ◽  
Uv Curable ◽  
Dynamic Covalent Chemistry ◽  
Tung Oil ◽  
Microwave Assisted ◽  
Smart Coatings

This study reports the development of super “green” smart coatings by integrating renewable resources, microwave-assisted synthesis, and dynamic covalent chemistry into UV-curable coatings. First, a novel UV-curable oligomer (TMG) was...

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