The mechanical properties of polymer–colloid hybrid hydrogels

Soft Matter ◽  
2017 ◽  
Vol 13 (27) ◽  
pp. 4786-4790 ◽  
Author(s):  
H. Dehne ◽  
F. M. Hecht ◽  
A. R. Bausch
Keyword(s):  
Mechanical Properties ◽  
Functional Properties ◽  
Colloidal Particles ◽  
Hybrid Gels ◽  
Hybrid Hydrogels ◽  
Polymer Colloid

The incorporation of monodisperse colloidal particles in hydrogels is a promising approach to create hybrid gels with unique structural, mechanical and functional properties.

scholarly journals Peptide:glycosaminoglycan hybrid hydrogels as an injectable intervention for spinal disc degeneration

2016 ◽  
Vol 4 (19) ◽  
pp. 3225-3231 ◽  
Author(s):  
D. E. Miles ◽  
E. A. Mitchell ◽  
N. Kapur ◽  
P. A. Beales ◽  
R. K. Wilcox
Keyword(s):  
Mechanical Properties ◽  
Disc Degeneration ◽  
Self Assembly ◽  
Hybrid Gels ◽  
Hybrid Hydrogels ◽  
Spinal Disc

Peptide and glycosaminoglycan hybrid gels undergo self-assembly and result in tuneable mechanical properties with suitability for intradiscal treatments.

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...

Extremely stretchable and tough hybrid hydrogels based on gelatin, κ-carrageenan and polyacrylamide

Soft Matter ◽  
2021 ◽  
Author(s):  
Xingyue Sun ◽  
Lina Ye ◽  
Haiyi Liang
Keyword(s):  
Mechanical Properties ◽  
Practical Applications ◽  
Hybrid Hydrogels ◽  
Soft Electronics

Nowadays, several approaches are being suggested to endow hydrogels with improved mechanical properties for practical applications as cartilage and skin replacements, soft electronics, and actuators.

scholarly journals A review on the application of inorganic nanoparticles in chemical surface coatings on metallic substrates

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7531-7539 ◽  
Author(s):  
Cong-cong Jiang ◽  
Yan-ke Cao ◽  
Gui-yong Xiao ◽  
Rui-fu Zhu ◽  
Yu-peng Lu
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Functional Properties ◽  
Inorganic Nanoparticles ◽  
Surface Coatings ◽  
Nanocomposite Coatings ◽  
Metallic Substrates ◽  
Chemical Surface

Nanocomposite coatings obtained by the controlled addition of inorganic nanoparticles into the treatment baths not only improve the corrosion resistance and mechanical properties, but also enhance the functional properties.

Composite 316L+Al2O3 for Application in Medicine

2012 ◽  
Vol 706-709 ◽  
pp. 643-648
Author(s):  
Agata Dudek ◽  
Renata Włodarczyk
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Austenitic Steel ◽  
Functional Properties ◽  
Ceramic Materials ◽  
Ceramic Composites ◽  
New Materials ◽  
Metallic Material ◽  
Joint Prostheses

The demand for new materials in medicine is on the increase today. Long-lasting implants (joint prostheses, dentistry implants), made typically of metals and their alloys, are characterized with high mechanical properties, however their corrosion resistance and biocompatibility are relatively low. One of the methods to ensure particular functional properties is to employ composite implants, combining improved mechanical properties of metallic material with biocompatibility of ceramic materials. The study aimed to develop and analyse properties of metallic/ceramic composites made of the mixture of powders: austenitic steel (316LHD) and ceramics (Al2O3).

Theory and Simulation of Polymers at Interfaces

MRS Bulletin ◽  
1997 ◽  
Vol 22 (1) ◽  
pp. 13-15 ◽  
Author(s):  
Anna C. Balazs
Keyword(s):  
Mechanical Properties ◽  
Polymer Films ◽  
Colloidal Particles ◽  
Structural Integrity ◽  
Solid Surfaces ◽  
Polymer Layer ◽  
Polymer Interfaces ◽  
New Materials ◽  
Immiscible Polymers ◽  
The Individual

The articles in this issue illustrate how various theoretical and computer models have been used to probe behavior of polymers at penetrable and impenetrable interfaces. Interest in polymer interfaces stems from the control interfaces commonly have over macroscopic properties—such as the strength or biocompatibility of the material. Consider the “alloying” or blending of existing polymers. This technique provides an inexpensive means of fabricating new materials that can display the desirable properties of the individual components. Most polymer pairs however are immiscible, and the mixture segregates into macroscopic domains separated by relatively weak interfaces. To enhance the structural integrity of the blend, copolymer “compatibilizers” are added to the mixture. These chains localize at the interface between the immiscible polymers, enhance the adhesion between the phase-separated regions, and thereby improve the mechanical properties of the blend.On an impenetrable interface, polymer films or coatings are commonly used to modify the properties of the underlying substrate. For example the polymer layer can be utilized to tailor biocompatibility, wettability, or roughness of the surface. Polymers anchored to solid surfaces can also be used to control the interaction between these surfaces. Thus the tethered layer can promote the adhesion between dissimilar solids or prevent the aggregation of colloidal particles.

Precipitated Calcium Carbonate Hybrid Hydrogels: Structural and Mechanical Properties

2009 ◽  
Vol 42 (17) ◽  
pp. 6606-6613 ◽  
Author(s):  
Murat Guvendiren ◽  
Paul A. Heiney ◽  
Shu Yang
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Precipitated Calcium Carbonate ◽  
Hybrid Hydrogels

scholarly journals Novel Chitosan-Silica Hybrid Hydrogels for Cell Encapsulation and Drug Delivery

2021 ◽  
Vol 22 (22) ◽  
pp. 12267
Author(s):  
Soher N. Jayash ◽  
Paul R. Cooper ◽  
Richard M. Shelton ◽  
Sarah A. Kuehne ◽  
Gowsihan Poologasundarampillai
Keyword(s):  
Mechanical Properties ◽  
Sol Gel ◽  
Cell Encapsulation ◽  
Biological Properties ◽  
Aqueous Environment ◽  
Absorption Bands ◽  
Hybrid Hydrogels ◽  
Oscillatory Rheometry ◽  
3D Cell Cultures

Hydrogels constructed from naturally derived polymers provide an aqueous environment that encourages cell growth, however, mechanical properties are poor and degradation can be difficult to predict. Whilst, synthetic hydrogels exhibit some improved mechanical properties, these materials lack biochemical cues for cells growing and have limited biodegradation. To produce hydrogels that support 3D cell cultures to form tissue mimics, materials must exhibit appropriate biological and mechanical properties. In this study, novel organic-inorganic hybrid hydrogels based on chitosan and silica were prepared using the sol-gel technique. The chemical, physical and biological properties of the hydrogels were assessed. Statistical analysis was performed using One-Way ANOVAs and independent-sample t-tests. Fourier transform infrared spectroscopy showed characteristic absorption bands including amide II, Si-O and Si-O-Si confirming formation of hybrid networks. Oscillatory rheometry was used to characterise the sol to gel transition and viscoelastic behaviour of hydrogels. Furthermore, in vitro degradation revealed both chitosan and silica were released over 21 days. The hydrogels exhibited high loading efficiency as total protein loading was released in a week. There were significant differences between TC2G and C2G at all-time points (p < 0.05). The viability of osteoblasts seeded on, and encapsulated within, the hydrogels was >70% over 168 h culture and antimicrobial activity was demonstrated against Pseudomonas aeruginosa and Enterococcus faecalis. The hydrogels developed here offer alternatives for biopolymer hydrogels for biomedical use, including for application in drug/cell delivery and for bone tissue engineering.

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