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
2020 ◽  
Vol 98 (2) ◽  
pp. 66-73 ◽  
Author(s):  
Celia Ferrag ◽  
Maryam Abdinejad ◽  
Kagan Kerman

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.


2020 ◽  
Vol 8 (46) ◽  
pp. 24718-24733
Author(s):  
Meng Wu ◽  
Jingsi Chen ◽  
Yuhao Ma ◽  
Bin Yan ◽  
Mingfei Pan ◽  
...  

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.


2019 ◽  
Vol 43 (20) ◽  
pp. 7701-7707 ◽  
Author(s):  
Shujing Ren ◽  
Panpan Sun ◽  
Aoli Wu ◽  
Na Sun ◽  
Lixin Sun ◽  
...  

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


2019 ◽  
Vol 86 (10) ◽  
Author(s):  
Chuanqian Shi ◽  
Zhanan Zou ◽  
Zepeng Lei ◽  
Xingli Wu ◽  
Zhengwei Liu ◽  
...  

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.


2018 ◽  
Vol 7 (8) ◽  
pp. 904-908 ◽  
Author(s):  
Yangjun Chen ◽  
Diana Diaz-Dussan ◽  
Di Wu ◽  
Wenda Wang ◽  
Yi-Yang Peng ◽  
...  

2020 ◽  
Author(s):  
bowen fan ◽  
Kai Zhang ◽  
Qian Liu ◽  
Rienk Eelkema

<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>


2020 ◽  
Author(s):  
bowen fan ◽  
Kai Zhang ◽  
Qian Liu ◽  
Rienk Eelkema

<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>


ChemPlusChem ◽  
2021 ◽  
Author(s):  
Ye Zhang ◽  
Qimeng Wang ◽  
Ziyan Wang ◽  
Difei Zhang ◽  
Jieyu Gu ◽  
...  

2017 ◽  
Vol 1 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Asja Pettignano ◽  
Marleen Häring ◽  
Luca Bernardi ◽  
Nathalie Tanchoux ◽  
Françoise Quignard ◽  
...  

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


2021 ◽  
Author(s):  
Jinshuai Zhang ◽  
Jia Huang ◽  
Guoqiang Zhu ◽  
Xixi Yu ◽  
Jianwen Cheng ◽  
...  

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...


Sign in / Sign up

Export Citation Format

Share Document