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.

scholarly journals Self-Healing Hydrogels with both LCST and UCST through Cross-Linking Induced Thermo-Response

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 490 ◽  
Author(s):  
Haifeng Zhao ◽  
Heng An ◽  
Baozhong Xi ◽  
Yan Yang ◽  
Jianglei Qin ◽  
...  
Keyword(s):  
Sol Gel ◽  
Covalent Bond ◽  
The Self ◽  
Solution Temperature ◽  
Cross Linking ◽  
Self Healing ◽  
Critical Solution Temperature ◽  
Upper Critical Solution Temperature ◽  
Healing Property ◽  
Sol Gel Transition

Self-healing hydrogels have drawngreat attention in the past decade since the self-healing property is one of the characteristics of living creatures. In this study, poly(acrylamide-stat-diacetone acrylamide) P(AM-stat-DAA) with a pendant ketone group was synthesized from easy accessible monomers, and thermo-responsive self-healing hydrogels were prepared through a series of diacylhydrazide compounds cross-linking without any additional stimulus. Although the copolymers do not show thermo-response, the hydrogels became thermo-responsive andboth the lower critical solution temperature (LCST) and upper critical solution temperature (UCST) varied with the composition of the copolymer and structure of cross-linkers. With a dynamic covalent bond connection, the hydrogel showed gel-sol-gel transition triggered by acidity, redox, and ketone to acylhydrazide group ratios. This is another interesting cross-linking induced thermo-responsive (CIT) hydrogel with different properties compared to PNIPAM-based thermo-responsive hydrogels. The self-healing hydrogel with CIT properties could have great potential for application in areas related to bioscience, life simulation, and temperature switching.

Cross-linking induced thermoresponsive hydrogel with light emitting and self-healing property

2019 ◽  
Vol 57 (8) ◽  
pp. 869-877 ◽  
Author(s):  
Jiafu Shen ◽  
Xuemeng Wang ◽  
Heng An ◽  
Limin Chang ◽  
Yong Wang ◽  
...  
Keyword(s):  
Cross Linking ◽  
Self Healing ◽  
Light Emitting ◽  
Thermoresponsive Hydrogel ◽  
Healing Property

scholarly journals Self-Healing UV Curable Acrylate Coatings for Wood Finishing System, Part 1: Impact of the Formulation on Self-Healing Efficiency

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 770
Author(s):  
Chloé Paquet ◽  
Thomas Schmitt ◽  
Jolanta E. Klemberg-Sapieha ◽  
Jean-François Morin ◽  
Véronic Landry
Keyword(s):  
Mechanical Properties ◽  
Scratch Resistance ◽  
The Self ◽  
Cross Linking ◽  
Hydroxyl Groups ◽  
Self Healing ◽  
Hydrogen Binding ◽  
Uv Curable ◽  
Wood Flooring ◽  
Healing Property

In the wood flooring sector, good surface mechanical properties, such as abrasion and scratch resistance, are prerequisite. Surface wood protection is provided by finishing systems. Despite coating improvement, scratches formation on wood flooring is unavoidable. A new approach to increase service life is to confer the self-healing property to the finishing system. The most common coatings used for prefinished wood flooring are acrylate UV curable 100% solids coatings. They usually have good mechanical properties and high cross-linking density. The objective of this study was to develop and evaluate an intrinsic self-healing formulation, which is applicable to wood flooring. For this purpose, acrylate formulations were developed with monomers and oligomers carrying hydroxyl groups. To meet the requirements of wood application, hardness, and polymerization conversion of coatings were evaluated. König pendulum damping tests provide information on coating hardness and flexibility. Results around 80 oscillations is acceptable for UV curable wood sealer. The chemical composition was studied by FT-IR spectroscopy while dynamical mechanical analysis (DMA) was performed to determine glass transition temperature and cross-linking density. The self-healing behavior was evaluated by gloss and scratch depth measurements. The formulation’s composition impacted the hydrogen binding quantity, the conversion, the Tg and the cross-linking density. The (hydroxyethyl)methacrylate (HEMA) monomer provided self-healing and acrylated allophanate oligomer allowed self-healing and cross-linking. This study demonstrated that it is possible to combine high cross-linking density and self-healing property, using components with low steric hindrance.

scholarly journals Characterization of Steel Slag Filler and Its Effect on Aging Resistance of Asphalt Mastic with Various Aging Methods

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 869
Author(s):  
Minghua Wei ◽  
Shaopeng Wu ◽  
Haiqin Xu ◽  
Hechuan Li ◽  
Chao Yang
Keyword(s):  
Particle Size ◽  
Surface Characterization ◽  
Steel Slag ◽  
Self Healing ◽  
Limestone Filler ◽  
Asphalt Mastic ◽  
Pore Characterization ◽  
Asphalt Mastics ◽  
Healing Property

Steel slag is the by-product of the steelmaking industry, the negative influences of which prompt more investigation into the recycling methods of steel slag. The purpose of this study is to characterize steel slag filler and study its feasibility of replacing limestone filler in asphalt concrete by evaluating the resistance of asphalt mastic under various aging methods. Firstly, steel slag filler, limestone filler, virgin asphalt, steel slag filler asphalt mastic and limestone filler asphalt mastic were prepared. Subsequently, particle size distribution, surface characterization and pore characterization of the fillers were evaluated. Finally, rheological property, self-healing property and chemical functional groups of the asphalt mastics with various aging methods were tested via dynamic shear rheometer and Fourier transform infrared spectrometer. The results show that there are similar particle size distributions, however, different surface characterization and pore characterization in the fillers. The analysis to asphalt mastics demonstrates how the addition of steel slag filler contributes to the resistance of asphalt mastic under the environment of acid and alkaline but is harmful under UV radiation especially. In addition, the pore structure in steel slag filler should be a potential explanation for the changing resistance of the asphalt mastics. In conclusion, steel slag filler is suggested to replace limestone filler under the environment of acid and alkaline, and environmental factor should be taken into consideration when steel slag filler is applied to replace natural fillers in asphalt mastic.

Iron (III) cross-linked thermoplastic nitrile butadiene elastomer with temperature-adaptable self-healing property

2021 ◽  
Vol 28 (3) ◽  
Author(s):  
Chenghao Dai ◽  
Xijuan Cao ◽  
Kai Gou ◽  
Qiyan Yin ◽  
Binjie Du ◽  
...  
Keyword(s):  
Self Healing ◽  
Healing Property

Robust Anti-Infective Multilayer Coatings with Rapid Self-Healing Property

2021 ◽  
pp. 111828
Author(s):  
Chao Zhou ◽  
Juntao Zhou ◽  
Xiaoqing Ma ◽  
Dicky Pranantyo ◽  
Jingjing Li ◽  
...  
Keyword(s):  
Multilayer Coatings ◽  
Self Healing ◽  
Healing Property
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