scholarly journals Self-healing and mechanical performance of dynamic glycol chitosan hydrogel nanocomposites

2021 ◽  
Author(s):  
Spyridon Efstathiou ◽  
Alan M. Wemyss ◽  
Georgios Patias ◽  
Lucas Al-Shok ◽  
Maria Grypioti ◽  
...  
Keyword(s):  
Schiff Base ◽  
Mechanical Performance ◽  
Self Healing ◽  
Glycol Chitosan ◽  
Chitosan Hydrogel ◽  
Nanocomposite Hydrogels ◽  
Hydrogel Nanocomposites

Evaluation of Schiff base nanocomposite hydrogels properties using a benzaldehyde multifunctional amphiphilic polyacrylamide crosslinker in conjunction with glycol chitosan.

scholarly journals Synthesis, Characterization, and Antifogging Application of Polymer/Al2O3 Nanocomposite Hydrogels with High Strength and Self-Healing Capacity

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1362 ◽  
Author(s):  
Bo Xu ◽  
Yuwei Liu ◽  
Jiugang Yuan ◽  
Ping Wang ◽  
Qiang Wang
Keyword(s):  
Large Scale ◽  
Mechanical Performance ◽  
Glass Plate ◽  
Hot Water ◽  
Alumina Nanoparticles ◽  
Great Promise ◽  
Self Healing ◽  
Practical Applications ◽  
Nanocomposite Hydrogels ◽  
Al2o3 Nps

Hydrogels with outstanding mechanical performance, self-healing capacity, and special functionality are highly desirable for their practical applications. However, it remains a great challenge to achieve such hydrogels by a facile approach. Here, we report a new type of nanocomposite hydrogels by in situ copolymerization of acrylic acid (AA) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) using alumina nanoparticles (Al2O3 NPs) as the cross-linkers. The obtained hydrogels are highly stretchable and compressible, which could sustain large-scale extension (>1700%) or compression (90%) without failure, and exhibit tensile and compressive strength up to 660 kPa and 8.3 MPa, respectively. Furthermore, this kind of hydrogel also display considerable self-healing capacity due to their noncovalent cross-linking mechanism, as well as the hydrogen-bonding interactions between polymer chains. More interestingly, it was found that the resultant gels possess a long-lasting antifogging property that could prevent the formation of fog on the glass plate above hot water for at least 90 min. It is expected that this novel type of hydrogel would show great promise for various applications, including soft robots, artificial muscles, and optical devices.

Highly transparent and self-healing films based on the dynamic Schiff base linkage

RSC Advances ◽  
2016 ◽  
Vol 6 (116) ◽  
pp. 115247-115251 ◽  
Author(s):  
Jiaoyu Ren ◽  
Yanxi Zhu ◽  
Hongyun Xuan ◽  
Xuefan Liu ◽  
Zhichao Lou ◽  
...  
Keyword(s):  
Schiff Base ◽  
Layer By Layer ◽  
Self Healing ◽  
Layer Technique ◽  
Layer By Layer Technique

In this study, we report highly transparent self-healing films based on Schiff base linkages between DF-PEG and CS via a layer-by-layer technique.

Notch insensitive and self-healing PNIPAm–PAM–clay nanocomposite hydrogels

Soft Matter ◽  
2014 ◽  
Vol 10 (19) ◽  
pp. 3506 ◽  
Author(s):  
Tao Wang ◽  
Shudian Zheng ◽  
Weixiang Sun ◽  
Xinxing Liu ◽  
Shiyu Fu ◽  
...  
Keyword(s):  
Self Healing ◽  
Nanocomposite Hydrogels

Fast‐reprocessing, Post‐adjustable, Self‐healing Covalent Adaptable Networks with Schiff base and Diels‐Alder Adduct

2022 ◽  
pp. 2100777
Author(s):  
Xiwei Xu ◽  
Songqi Ma ◽  
Sheng Wang ◽  
Binbo Wang ◽  
Hongzhi Feng ◽  
...  
Keyword(s):  
Schiff Base ◽  
Diels Alder ◽  
Self Healing ◽  
Alder Adduct

scholarly journals Dynamic Mussel-Inspired Chitin Nanocomposite Hydrogels for Wearable Strain Sensors

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1416 ◽  
Author(s):  
Pejman Heidarian ◽  
Abbas Z. Kouzani ◽  
Akif Kaynak ◽  
Ali Zolfagharian ◽  
Hossein Yousefi
Keyword(s):  
Mechanical Properties ◽  
Polyacrylic Acid ◽  
Strain Sensors ◽  
Self Healing ◽  
Network Stability ◽  
Ferric Ions ◽  
Trade Off ◽  
Nanocomposite Hydrogels ◽  
Healing Efficiency ◽  
Hydrogel Network

It is an ongoing challenge to fabricate an electroconductive and tough hydrogel with autonomous self-healing and self-recovery (SELF) for wearable strain sensors. Current electroconductive hydrogels often show a trade-off between static crosslinks for mechanical strength and dynamic crosslinks for SELF properties. In this work, a facile procedure was developed to synthesize a dynamic electroconductive hydrogel with excellent SELF and mechanical properties from starch/polyacrylic acid (St/PAA) by simply loading ferric ions (Fe3+) and tannic acid-coated chitin nanofibers (TA-ChNFs) into the hydrogel network. Based on our findings, the highest toughness was observed for the 1 wt.% TA-ChNF-reinforced hydrogel (1.43 MJ/m3), which is 10.5-fold higher than the unreinforced counterpart. Moreover, the 1 wt.% TA-ChNF-reinforced hydrogel showed the highest resistance against crack propagation and a 96.5% healing efficiency after 40 min. Therefore, it was chosen as the optimized hydrogel to pursue the remaining experiments. Due to its unique SELF performance, network stability, superior mechanical, and self-adhesiveness properties, this hydrogel demonstrates potential for applications in self-wearable strain sensors.

Evaluation of enzymatically crosslinked injectable glycol chitosan hydrogel

2015 ◽  
Vol 3 (27) ◽  
pp. 5511-5522 ◽  
Author(s):  
Shalini V Gohil ◽  
Sarah B. Brittain ◽  
Ho-Man Kan ◽  
Hicham Drissi ◽  
David W. Rowe ◽  
...  
Keyword(s):  
Growth Factor ◽  
Growth Factor Delivery ◽  
Glycol Chitosan ◽  
Chitosan Hydrogel

An injectable, enzymatically crosslinkable glycol chitosan hydrogel was developed and evaluated for localized growth factor delivery.

Sign in / Sign up

Export Citation Format

Share Document