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...

scholarly journals Mechanical Properties and Electrical Discharge Machinability of Alumina-10 vol% Zirconia-28 vol% Titanium Nitride Composites

Ceramics ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 199-209 ◽  
Author(s):  
Andrea Gommeringer ◽  
Frank Kern
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Composite Material ◽  
Titanium Nitride ◽  
Electrical Discharge ◽  
Fracture Resistance ◽  
High Strength ◽  
Electrically Conductive ◽  
Material Hardness ◽  
Ceramic Components

Electrical discharge machinable ceramics provide an alternative machining route independent on the material hardness which enables manufacturing of customized ceramic components. In this study a composite material based on an alumina/zirconia matrix and an electrically conductive titanium nitride dispersion was manufactured by hot pressing and characterized with respect to microstructure, mechanical properties and ED-machinability by die sinking. The composites show a combination of high strength of 700 MPa, hardness of 17–18 GPa and moderate fracture resistance of 4.5–5 MPa√m. With 40 kS/m the electrical conductivity is sufficiently high to ensure ED-machinability.

Cellulose-Based Hydrogels with Controllable Electrical and Mechanical Properties

2018 ◽  
Vol 232 (9-11) ◽  
pp. 1707-1716 ◽  
Author(s):  
Enwei Zhang ◽  
Jing Yang ◽  
Wei Liu
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Artificial Muscle ◽  
Compressive Modulus ◽  
Electrically Conductive ◽  
Pure Cellulose ◽  
Reduced Graphene ◽  
Cellulose Hydrogel ◽  
Environmentally Friendly Method

Abstract Electrically conductive cellulose-based hydrogels are prepared by a facile and environmentally friendly method, of which the electrical and mechanical properties can be easily controlled by varying the graphene loading. With an ultralow initial addition of graphene oxide (GO, 0.2 wt% versus the mass of cellulose), the resulting cellulose/reduced graphene oxide (CG0.2) hydrogel shows a significantly enhanced compressive modulus of 332.01 kPa, 54.8% higher than that of pure cellulose hydrogel. Further increasing the addition of GO to 2 wt% (versus the mass of cellulose), the electrical conductivity of the resultant CG2.0 hydrogel is as high as 7.3×10−3 S/m, 10,000-fold higher than that of pure cellulose hydrogel, and of which the mechanical properties are also enhanced. These cellulose-based hydrogels with controllable electrical and mechanical properties have a great potential for application in drug delivery and artificial muscle.

scholarly journals Preparation and Characterization of Epoxy Resin Filled with Ti3C2Tx MXene Nanosheets with Excellent Electric Conductivity

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 162 ◽  
Author(s):  
Ailing Feng ◽  
Tianqi Hou ◽  
Zirui Jia ◽  
Yi Zhang ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Epoxy Resin ◽  
Electric Conductivity ◽  
Mechanical Performance ◽  
Conductive Adhesive ◽  
Electrically Conductive ◽  
Solution Blending ◽  
Electrically Conductive Adhesive ◽  
And Performance

MXene represents new kinds of two-dimensional material transition metal carbides and/or carbonitrides, which have attracted much attention in various applications including electrochemical storage devices, catalysts, and polymer composite. Here, we report a facile method to synthesize Ti3C2Tx MXene nanosheets and prepare a novel electrically conductive adhesive based on epoxy resin filled with Ti3C2Tx MXene nanosheets by solution blending. The structure, morphology, and performance of Ti3C2Tx MXene nanosheets and epoxy/Ti3C2Tx MXene nanosheets composite were investigated. The results show that Ti3C2Tx MXene possesses nanosheet structure. Ti3C2Tx MXene nanosheets were homogeneously dispersed in epoxy resin. Electrical conductivity and mechanical properties measurements reveal that the epoxy/Ti3C2Tx MXene nanosheet composite exhibited both good electrical conductivity (4.52 × 10−4 S/m) and favorable mechanical properties (tensile strength of 66.2 MPa and impact strength of 24.2 kJ/m2) when the content of Ti3C2Tx MXene nanosheets is 1.2 wt %. Thus, Ti3C2Tx MXene is a promising filler for electrically conductive adhesive with high electric conductivity and high mechanical performance.

scholarly journals Electrically Conductive, Transparent Polymeric Nanocomposites Modified by 2D Ti3C2Tx (MXene)

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1272 ◽  
Author(s):  
Aisha Tanvir ◽  
Patrik Sobolčiak ◽  
Anton Popelka ◽  
Miroslav Mrlik ◽  
Zdenko Spitalsky ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Flexible Electronics ◽  
Uv Spectroscopy ◽  
Composite Films ◽  
Mechanical Analysis ◽  
Nanocomposite Films ◽  
Max Phase ◽  
Polymeric Nanocomposites ◽  
Electrically Conductive

The electrically conductive, transparent, and flexible self-standing thin nanocomposite films based on copolyamide matrix (coPA:Vestamelt X1010) modified with 2D Ti3C2Tx (MXene) nanosheets were prepared by casting and their electrical, mechanical and optical properties and then, were investigated. The percolation threshold of the MXene filler within the coPA matrix was found to be 0.05 vol. %, and the highest determined electrical conductivity was 1.4 × 10−2 S·cm−1 for the composite filled with 5 wt. % (1.8 vol. %) of MXene. The electrical conductivity of the as-prepared MXene was 9.1 S·cm–1, and the electrical conductivity of the MAX phase (the precursor for MXene preparation) was 172 S·cm–1. The transparency of the prepared composite films exceeded 75%, even for samples containing 5 wt. % of MXene, as confirmed by UV spectroscopy. The dynamic mechanical analysis confirmed the improved mechanical properties, such as the storage modulus, which improved with the increasing MXene content. Moreover, all the composite films were very flexible and did not break under repeated twisting. The combination of the relatively high electrical conductivity of the composites filled with low filler content, an appropriate transparency, and good mechanical properties make these materials promising for applications in flexible electronics.

Spontaneously restored electrical conductivity of bioactive gel comprising mussel adhesive protein-coated carbon nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (90) ◽  
pp. 87044-87048 ◽  
Author(s):  
Hyunjung Lee ◽  
Yu-Mi Ha ◽  
Sang Hyun Lee ◽  
Young-il Ko ◽  
Hiroyuki Muramatsu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Self Healing ◽  
Electrically Conductive ◽  
Adhesive Protein ◽  
Mussel Adhesive Proteins ◽  
Mussel Adhesive Protein ◽  
Mussel Adhesive ◽  
Adhesive Proteins ◽  
Coated Carbon

We demonstrated the pH-mediated self-healing performance of an electrically conductive gel comprising mussel adhesive proteins (MAPs) and carbon nanotubes (CNTs).

scholarly journals Tailoring mechanical properties and electrical conductivity of flexible niobium carbide nanocomposite thin films

RSC Advances ◽  
2014 ◽  
Vol 4 (106) ◽  
pp. 61355-61362 ◽  
Author(s):  
Luis Yate ◽  
L. Emerson Coy ◽  
Guocheng Wang ◽  
Mikel Beltrán ◽  
Enrique Díaz-Barriga ◽  
...  
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Niobium Carbide ◽  
Electrically Conductive ◽  
Nanocomposite Thin Films

This work shows the potential of hard, elastic and electrically conductive nanocomposite NbC films for nano- and micro- electronics applications.

scholarly journals Dynamic Covalent Bonds of Si-OR and Si-OSi Enabled A Stiff Polymer to Heal and Recycle at Room Temperature

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2680
Author(s):  
Ping Fan ◽  
Can Xue ◽  
Xiantai Zhou ◽  
Zujin Yang ◽  
Hongbing Ji
Keyword(s):  
Mechanical Properties ◽  
Small Molecule ◽  
Potential Application ◽  
Room Temperature ◽  
The Self ◽  
Self Healing ◽  
Bending Properties ◽  
Covalent Bonds ◽  
Model Experiments ◽  
Molecule Model

As stiff polymers are difficult to self-heal, the balance between polymers’ self-healing ability and mechanical properties is always a big challenge. Herein, we have developed a novel healable stiff polymer based on the Si-OR and Si-OSi dynamic covalent bonds. The self-healing mechanism was tested and proved by the small molecule model experiments and the contrast experiments of polymers. This polymer possesses excellent tensile, bending properties as well as room temperature self-healing abilities. Moreover, due to the sticky and shapeable properties under wetting conditions, the polymer could be used as an adhesive. Besides, even after four cycles of recycling, the polymer maintains its original properties, which meets the requirements of recyclable materials. It was demonstrated that the polymer exhibits potential application in some fields, such as recyclable materials and healable adhesives.

scholarly journals Selective Localization of Carbon Black in Bio-Based Poly (Lactic Acid)/Recycled High-Density Polyethylene Co-Continuous Blends to Design Electrical Conductive Composites with a Low Percolation Threshold

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1583 ◽  
Author(s):  
Xiang Lu ◽  
Benhao Kang ◽  
Shengyu Shi
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Electrical Conductivity ◽  
Lactic Acid ◽  
Carbon Black ◽  
Percolation Threshold ◽  
High Density Polyethylene ◽  
Poly Lactic Acid ◽  
Electrically Conductive ◽  
Selective Localization

The electrically conductive poly (lactic acid) (PLA)/recycled high-density polyethylene (HDPE)/carbon black (CB) composites with a fine co-continuous micro structure and selective localization of CB in the HDPE component were fabricated by one-step melt processing via a twin-screw extruder. Micromorphology analysis, electrical conductivity, thermal properties, thermal stability, and mechanical properties were investigated. Scanning electron microscope (SEM) images indicate that a co-continuous morphology is formed, and CB is selectively distributed in the HDPE component. With the introduction of CB, the phase size of the PLA component and the HDPE component in PLA/HDPE blends is reduced. In addition, differential scanning calorimetry (DSC) and thermos gravimetric analysis (TGA) results show that the introduction of CB promotes the crystallization behavior of the PLA and HDPE components, respectively, and improves the thermal stability of PLA70/30HDPE/CB composites. The electrically conductive percolation threshold of the PLA70/30HDPE/CB composites is around 5.0 wt %, and the electrical conductivity of PLA70/30HDPE/CB composites reaches 1.0 s/cm and 15 s/cm just at the 10 wt % and 15 wt % CB loading, respectively. Further, the tensile and impact tests show that the PLA70/30HDPE/CB composites have good mechanical properties. The excellent electrical conductivity and good mechanical properties offer the potential to broaden the application of PLA/HDPE/CB composites.

scholarly journals Fabrication of Flexible Electrically Conductive Polymer Based Micro-Patterns using Plasma Discharge

2020 ◽  
Author(s):  
Asma Abdulgader Abdul-kareem ◽  
Anton Popelka ◽  
Jolly Bhadra
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Integrated Circuits ◽  
Conductive Polymer ◽  
Nano Particles ◽  
Adhesion Promoter ◽  
Electrically Conductive ◽  
Planar Silicon ◽  
Silicon Based ◽  
Micro Patterns

The application of polymer-based micro-patterns in the field of flexible micro-electronics has become the focus as to replace rigid and planar silicon based integrated circuits with weak bendability. Polyethylene terephthalate (PET) can be used as a substrate because of its excellent flexible and mechanical properties and polyaniline (PANI) is a typical representative of the electrical conductive polymers applicable for this purpose. PANI excels by a stable and controllable electrical conductivity, high environment stability, and ease fabrication. An improvement of electrical conductivity of PANI can be achieved using different nano-particles, such as carbon nanotubes (CNTs). CNTs since their discovery have attracted attention due to their excellent electrical, thermal, and mechanical properties, and had divergent applications, such as complex nano/micro-electronic devices, energy storage and both chemical and bio sensors. This research was focused on the preparation of micro-patterns based on electrically conductive PANI using shaping mold and cold plasma acting as adhesion promoter for PET substrate. The PANI/CNTs nano-composite was used to enhance an electrical conductivity of prepared micropatterns. The adhesion of prepared micro-patterns was evaluated based on the peel tests measurement. Various microscopic techniques, such as profilometry, scanning electron microscopy and atomic force microscopy (AFM), proved the homogeneous structures of prepared polymer based micro-patterns. Broad dielectric spectroscopy and conductive AFM confirmed electrical behavior of prepared micro-patterns.

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