scholarly journals COLLAGEN CROSS-LINKER EFFECT ON THE MECHANICAL PROPERTIES OF THE RADICULAR HYBRID LAYER IN RESTORATIVE DENTISTRY: A NANOINDENTATION STUDY

2019 ◽  
Author(s):  
GIANPAOLO SERINO ◽  
CRISTINA BIGNARDI ◽  
CLELIA BOCCAFOSCHI ◽  
NICOLA SCOTTI ◽  
ELIO BERUTTI ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Restorative Dentistry ◽  
Hybrid Layer ◽  
Cross Linker ◽  
Linker Effect

scholarly journals Tannic-Acid-Cross-Linked and TiO2-Nanoparticle-Reinforced Chitosan-Based Nanocomposite Film

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 228
Author(s):  
Swarup Roy ◽  
Lindong Zhai ◽  
Hyun Chan Kim ◽  
Duc Hoa Pham ◽  
Hussein Alrobei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tannic Acid ◽  
Nanocomposite Film ◽  
Food Packaging ◽  
Titanium Dioxide Nanoparticles ◽  
Casting Technique ◽  
Active Food Packaging ◽  
Reinforcing Agent ◽  
Solution Casting Technique ◽  
Cross Linker

A chitosan-based nanocomposite film with tannic acid (TA) as a cross-linker and titanium dioxide nanoparticles (TiO2) as a reinforcing agent was developed with a solution casting technique. TA and TiO2 are biocompatible with chitosan, and this paper studied the synergistic effect of the cross-linker and the reinforcing agent. The addition of TA enhanced the ultraviolet blocking and mechanical properties of the chitosan-based nanocomposite film. The reinforcement of TiO2 in chitosan/TA further improved the nanocomposite film’s mechanical properties compared to the neat chitosan or chitosan/TA film. The thermal stability of the chitosan-based nanocomposite film was slightly enhanced, whereas the swelling ratio decreased. Interestingly, its water vapor barrier property was also significantly increased. The developed chitosan-based nanocomposite film showed potent antioxidant activity, and it is promising for active food packaging.

scholarly journals Recyclable Self-Healing Polyurethane Cross-Linked by Alkyl Diselenide with Enhanced Mechanical Properties

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 773 ◽  
Author(s):  
Yuqing Qian ◽  
Xiaowei An ◽  
Xiaofei Huang ◽  
Xiangqiang Pan ◽  
Jian Zhu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Amide Bond ◽  
Self Healing ◽  
Healing Efficiency ◽  
Polyurethane Networks ◽  
Combined Action ◽  
Cross Linker ◽  
Dynamic Structures ◽  
External Interventions

Dynamic structures containing polymers can behave as thermosets at room temperature while maintaining good mechanical properties, showing good reprocessability, repairability, and recyclability. In this work, alkyl diselenide is effectively used as a dynamic cross-linker for the design of self-healing poly(urea–urethane) elastomers, which show quantitative healing efficiency at room temperature, without the need for any catalysts or external interventions. Due to the combined action of the urea bond and amide bond, the material has better mechanical properties. We also compared the self-healing effect of alkyl diselenide-based polyurethanes and alkyl disulfide-based polyurethanes. The alkyl diselenide has been incorporated into polyurethane networks using a para-substituted amine diphenyl alkyl diselenide. The resulting materials not only exhibit faster self-healing properties than the corresponding disulfide-based materials, but also show the ability to be processed at temperatures as low as 60 °C.

Cross-Linker Effect in ETFE-Based Radiation-Grafted Proton-Conducting Membranes

2008 ◽  
Vol 155 (9) ◽  
pp. B921 ◽  
Author(s):  
Lorenz Gubler ◽  
Hicham Ben youcef ◽  
Selmiye Alkan Gürsel ◽  
Alexander Wokaun ◽  
Günther G. Scherer
Keyword(s):  
Proton Conducting ◽  
Cross Linker ◽  
Conducting Membranes ◽  
Linker Effect

The Influence of Thickness of Layers in the Multilayer Coating of the PN + AlCrTiNmultinano Hybrid Layer on Tribological Properties

2014 ◽  
Vol 223 ◽  
pp. 127-136
Author(s):  
Joanna Kacprzyńska-Gołacka ◽  
Karolina Rydzewska ◽  
Adam Mazurkiewicz ◽  
Jan Kusiński ◽  
Jerzy Smolik ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Surface Topography ◽  
Tribological Properties ◽  
Surface Engineering ◽  
Plasma Nitriding ◽  
Multilayer Coating ◽  
Hybrid Layer ◽  
Treatment Technology ◽  
Hybrid Layers

One of the most perspective directions of the development of surface engineering is related to hybrid technologies. The best-known and widely used hybrid surface treatment technology is a combination of a gas or plasma nitriding process with the process of the deposition of hard antiwear coatings by means of PVD methods. The paper presents the influence of the thickness of layers in the multilayer coating on tribological properties of hybrid layers – PN + AlCrTiNmultinano obtained on the EN X32CrMoV3.3 hot working steel. The research methods concentrated on the analysis of mechanical properties, surface topography and microstructure, and tribological properties. The studies on mechanical properties included tests on hardness using the nanoindentation method and tests on adhesion using the scratchtest. The analysis of surface topography and microstructure was examined by scanning electron microscopy and scanning transmission electron microscopy. The tribological properties were examined using the ball-on-disc method. The coating was tested with alumina balls as counterparts at room temperature. The authors indicate that the PN + AlCrTiNmultinano hybrid layers are characterized by excellent mechanical properties and tribological resistance. In this paper, the authors confirmed that the thickness of layers in a multilayer coating is important in shaping the mechanical and tribological properties of the PN + AlCrTiNmultinano hybrid layer.

scholarly journals Recent Advancements in Restorative Dentistry : An Overview

2020 ◽  
Vol 3 (07) ◽  
Author(s):  
Jatinder Kalotra ◽  
Kumar Gaurav ◽  
Jasmeet Kaur ◽  
Debashis Sethi ◽  
Gautam Arora ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Clinical Information ◽  
Dental Composites ◽  
Restorative Dentistry ◽  
Comprehensive Understanding ◽  
Important Goal ◽  
Vast Number ◽  
New Era ◽  
Dental Restorative ◽  
Day By Day

The important goal in dentistry is to provide best dental care to the patients. Day by day, science is undergoing great revolutions that are leading the humanity towards a new era of dentistry. Nanotechnology is introduced in conventional GIC and resin-modified GIC to improve the mechanical properties of GIC. The development and implementation of composite dental restorative materials rely on a comprehensive understanding of each component of the composite and consideration of methods for changing each component. The need to improve shrinkage properties and wear resistance is obvious for dental composites and a vast number of attempts have been made to accomplish these aims. Based on recent clinical information, it appears that major successes have been achieved in reaching the goal.

Impact of Adhesive Application and Moisture on the Mechanical Properties of the Adhesive Interface Determined by the Nano-indentation Technique

10.2341/08-36 ◽  
2009 ◽  
Vol 34 (1) ◽  
pp. 51-57 ◽  
Author(s):  
C. Higashi ◽  
M. D. Michel ◽  
A. Reis ◽  
A. D. Loguercio ◽  
O. M. M. Gomes ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Adhesive Layer ◽  
Single Bond ◽  
Hybrid Layer ◽  
Nano Indentation ◽  
Water Based ◽  
Adhesive Application ◽  
Demineralized Dentin

Clinical Relevance The vigorous rubbing action of acetone and ethanol/water-based adhesives into dry demineralized dentin resulted in high nanohardness and Young's modulus in the hybrid layer, and moisture increased the nanohardness and Young's modulus of Adper Single Bond Plus in the adhesive layer.

Publisher's Note: Cross-Linker Effect in ETFE-Based Radiation-Grafted Proton-Conducting Membranes

2008 ◽  
Vol 155 (10) ◽  
pp. S7
Author(s):  
Lorenz Gubler ◽  
Hicham Ben youcef ◽  
Selmiye Alkan Gürsel ◽  
Alexander Wokaun ◽  
Günther G. Scherer
Keyword(s):  
Proton Conducting ◽  
Cross Linker ◽  
Conducting Membranes ◽  
Linker Effect

scholarly journals Biomimetic Design of Reversibly Unfolding Cross-Linker to Enhance Mechanical Properties of 3D Network Polymers

2007 ◽  
Vol 129 (46) ◽  
pp. 14110-14111 ◽  
Author(s):  
Aaron M. Kushner ◽  
Vahe Gabuchian ◽  
Evan G. Johnson ◽  
Zhibin Guan
Keyword(s):  
Mechanical Properties ◽  
Biomimetic Design ◽  
Network Polymers ◽  
3D Network ◽  
Cross Linker

Wheat Gluten Blends with a Macromolecular Cross-Linker for Improved Mechanical Properties and Reduced Water Absorption

2014 ◽  
Vol 2 (11) ◽  
pp. 2554-2561 ◽  
Author(s):  
Cheng Diao ◽  
Hongwei Xia ◽  
Iman Noshadi ◽  
Baishali Kanjilal ◽  
Richard S. Parnas
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Wheat Gluten ◽  
Cross Linker ◽  
Reduced Water

Preparation of a photocurable hydrogel with adjustable mechanical properties for 3D printing

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yifan Xu ◽  
Xiang Gu ◽  
Qinghua Meng ◽  
Bin Wang ◽  
Jun Fan
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Visible Light ◽  
High Capacity ◽  
3D Printer ◽  
Equilibrium Water Content ◽  
Content Type ◽  
Initiation System ◽  
Cross Linker ◽  
High Equilibrium

Purpose This paper aims to show a series of hydrogels with adjustable mechanical properties, which can be cured quickly with visible light. The hydrogel is prepared conveniently with hydroxyethyl acrylate, cross-linker, gelatin and photoinitiator, and can be printed into certain 3D patterns with the direct ink write (DIW) 3D printer designed and developed by the research group. Design/methodology/approach In this paper, the authors designed a composite sensitization initiation system that is suitable for hydrogels. The concentration of photoinitiator, gelatin and cross-linker was studied to optimize the curing efficiency and adjust the mechanical properties. A DIW 3D printer was designed for the printing of hydrogel. Pre-gel solution was loaded into printer for printing into established models. The models were made and sliced with software. Findings The hydrogels can be cured efficiently with 405-nm visible light. While adding various content of gelatin and cross-linker, the mechanical properties of hydrogels show from soft and fragile (elastic modulus of 121.18 kPa and work of tension of 218.11 kJ·m−3) to rigid and tough (elastic modulus of 505.15 kPa and work of tension of 969.00 kJ·m−3). The hydrogels have high capacity of water absorption. With the DIW 3D printer, pre-gel hydrogel solution can be printed into objects with certain dimension. Originality/value In this work, a composite sensitization initiation system was designed, and fast curing hydrogels with adjustable mechanical properties had been prepared conveniently, which has high equilibrium water content and 3D printability with the DIW 3D printer.

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