Chitin based hybrid composites reinforced with graphene derivatives: a nanoscale study

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63813-63820 ◽  
Author(s):  
Joaquín Antonio González ◽  
María Emilia Villanueva ◽  
María Luz Peralta Ramos ◽  
Claudio Javier Pérez ◽  
Lidia Leonor Piehl ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Hybrid Composites ◽  
Graphene Derivatives ◽  
Hydrogen Bondings ◽  
Two Hybrid

Two hybrid materials composed by chitin and nGO/rGO were obtained. nGO acts as a more efficient reinforcer than rGO due to the higher amount of hydrogen bondings established with chitin.

scholarly journals Graphene Hybrid Materials for Controlling Cellular Microenvironments

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4008
Author(s):  
Cheol-Hwi Kim ◽  
Tae-Hyung Kim
Keyword(s):  
Stem Cell ◽  
Hybrid Materials ◽  
Hybrid Composites ◽  
Stem Cell Differentiation ◽  
Physicochemical Characteristics ◽  
Key Factors ◽  
Cell Functions ◽  
Graphene Derivatives ◽  
Cytoskeletal Dynamics ◽  
Cellular Microenvironments

Cellular microenvironments are known as key factors controlling various cell functions, including adhesion, growth, migration, differentiation, and apoptosis. Many materials, including proteins, polymers, and metal hybrid composites, are reportedly effective in regulating cellular microenvironments, mostly via reshaping and manipulating cell morphologies, which ultimately affect cytoskeletal dynamics and related genetic behaviors. Recently, graphene and its derivatives have emerged as promising materials in biomedical research owing to their biocompatible properties as well as unique physicochemical characteristics. In this review, we will highlight and discuss recent studies reporting the regulation of the cellular microenvironment, with particular focus on the use of graphene derivatives or graphene hybrid materials to effectively control stem cell differentiation and cancer cell functions and behaviors. We hope that this review will accelerate research on the use of graphene derivatives to regulate various cellular microenvironments, which will ultimately be useful for both cancer therapy and stem cell-based regenerative medicine.

Hybrid materials based on graphene derivatives and porphyrin metal-organic frameworks

2019 ◽  
Vol 88 (8) ◽  
pp. 775-799 ◽  
Author(s):  
V V Arslanov ◽  
M A Kalinina ◽  
E V Ermakova ◽  
O A Raitman ◽  
Yu G Gorbunova ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Metal Organic Frameworks ◽  
Graphene Derivatives ◽  
Metal Organic

Two hybrid materials self-assembly from tetra(isothiocyanate)cobalt(II) dianion and substituted benzyl triphenylphosphinium

2010 ◽  
Vol 984 (1-3) ◽  
pp. 164-169 ◽  
Author(s):  
Xing Chen ◽  
Wei-Qiang Chen ◽  
Song Han ◽  
Jin-Fang Liu ◽  
Jia-Rong Zhou ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Self Assembly ◽  
Two Hybrid

scholarly journals An Investigation on Wear, Hardness and Impact Behaviour of Hybrid Composites

2021 ◽  
Vol 9 (10) ◽  
pp. 538-546
Author(s):  
Gangadhara H S
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Epoxy Composite ◽  
Hybrid Composites ◽  
Pairwise Comparison ◽  
Relative Significance ◽  
Synthetic Fibers ◽  
New Class ◽  
The Matrix ◽  
Two Hybrid

Abstract: According to the environmental aspects, the combinations of natural and synthetic fibers has been used for making eco-friendly products. The present investigation has been made develop and characterize a new class of composites with a polymer called epoxy-resin as the matrix and Hemp and synthetic fibers (Carbon, E-glass, Kevlar) are the reinforcing material. These materials are fabricated using hand layup technique to frame a fallowing hybrid composite, 1) Hemp/Carbon/Epoxy 2) Hemp/E-glass/Epoxy 3) Hemp/Kevlar/epoxy composites of 3mm thickness to find the various mechanical properties (wear, hardness and impact strength) of produced samples as per ASTM Standards. For defining relative significance of measured norms pairwise comparison was done. Wear, Hardness and Impact properties are carried out. The effect of fiber loading and length on mechanical properties like wear, hardness and impact strength of composites is studied. In these fallowing conditions shows a better property. The result on this study indicated that Hemp/Kevlar/Epoxy composite shows better impact mechanical properties compare to another two hybrid composites. Hemp/E-Glass/Epoxy composite shows better wear and hardness properties compare to another two hybrid composites. Hemp/Carbon/Epoxy composite shows intermediate properties compare to Hemp/E-Glass/Epoxy and Hemp/Kevlar/Epoxy composite. Keywords: Hemp, Carbon, Glass, Kevlar, Epoxy, Wear, Hardness, Impact test

Out with Acetonitrile: Water-assisted Accelerated-Aging Synthesis of CuI-Pyrazine Hybrid Materials

2021 ◽  
Author(s):  
Will Lucas ◽  
Feier Hou
Keyword(s):  
Hybrid Materials ◽  
Elevated Temperatures ◽  
Accelerated Aging ◽  
Synthetic Method ◽  
Ambient Conditions ◽  
Reaction Conditions ◽  
Dry Grinding ◽  
Excess Amount ◽  
First Time ◽  
Two Hybrid

CuI and pyrazine form three hybrid materials, [(CuI)2(pyrazine)] (Yellow), [(CuI)2(pyrazine)2] (Orange), and [(CuI)(pyrazine)] (Red). In this work, Red was prepared using a green synthetic method, water-assisted accelerated-aging synthesis, for the first time. The syntheses were performed under ambient conditions with only water and no organic solvents. Depending on the reaction conditions, the other two hybrid materials can be formed as well: Orange was formed immediately after dry grinding CuI and pyrazine, while Yellow can be formed from Red and excess amount of CuI at mildly elevated temperatures. The impacts of temperature and types and amounts of liquid added to the aging mixture on the accelerated-aging synthesis were studied, and mechanisms of the synthesis and interconversions between the three CuI-pyrazine hybrid materials were proposed.

Synthesis and Properties of Hybrid Materials for Ion-Exchange and Complexing Membranes

2013 ◽  
Vol 749 ◽  
pp. 283-288 ◽  
Author(s):  
Yury Pozhidaev ◽  
Oksana Lebedeva ◽  
Evgenya Sipkina ◽  
Alexandra Chesnokova ◽  
Nikolay Ivanov
Keyword(s):  
Hybrid Materials ◽  
Hybrid Composites ◽  
Sol Gel ◽  
Polymer Networks ◽  
Glycidyl Ether ◽  
Three Dimensional ◽  
Polymeric Materials ◽  
Interpenetrating Polymer Networks ◽  
Linear Polymers ◽  
Sol Gel Synthesis

Hybrid materials are attractive for a large range of applications from medicine and biotechnology to telecommunication systems and fuel cells. In the present research we have studied sol-gel synthesis of hybrid composites based on carbofunctional organosilicon monomers N,N-bis-(3-triethoxysilylpropyl) thiocarbamide (I) or 2-{[3-(triethoxysilyl) propyamino} pyridine (II), and copolymers of ethylene glycol vinyl glycidyl ether with vinyl chloride.The polymeric materials were characterized by scanning electron microscope (SEM) and IR-spectroscopy. Gel products possess high thermal stability (decomposition temperatures reach 250 °С) and have developed specific surface (to 20 m2g-1).The synthesized composites comprise semi-interpenetrating polymer networks, consisting of three-dimensional and linear polymers that cannot be separated due to the mechanical interlacing of theirs chains. Hybrid composites have a value of sorption capacity for Pt (IV) ions of 70 (I) and 28 (II) mgg-1. Proton conductivity of membranes based on the synthesized composites is characterized by the values 3.52 10-2(I) and 1.19 10-2(II) Scm-1measured at temperature of 25 °C.

One-year evaluation of two hybrid composites placed in a randomized-controlled clinical trial

2014 ◽  
Vol 30 (8) ◽  
pp. 824-838 ◽  
Author(s):  
Florian Beck ◽  
Nicoleta Dumitrescu ◽  
Franz König ◽  
Alexandra Graf ◽  
Peter Bauer ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Hybrid Composites ◽  
Controlled Clinical Trial ◽  
Randomized Controlled Clinical Trial ◽  
Randomized Controlled ◽  
One Year ◽  
Two Hybrid

scholarly journals Thermal, Spectroscopy and Luminescent Characterization of Hybrid PMMA/Lanthanide Complex Materials

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3156
Author(s):  
Małgorzata Gil-Kowalczyk ◽  
Renata Łyszczek ◽  
Anna Jusza ◽  
Ryszard Piramidowicz
Keyword(s):  
Optical Fibers ◽  
Hybrid Materials ◽  
Light Emission ◽  
Hybrid Composites ◽  
Spectral Characteristics ◽  
Lanthanide Complex ◽  
Thermal Mass ◽  
Complex Materials ◽  
Intense Luminescence

Novel hybrid materials based on the poly(methyl methacrylate) (PMMA) matrix and lanthanide(III) carboxylates Eu:2,6-DClB and Tb:2,6-DClB were synthesized and carefully analyzed in the context of their potential application in optically active polymer-based optical fibers. To determine the usefulness of the obtained materials, a careful thermal, mass spectroscopy, and optical characterization was performed, focusing on the features critical for the technology of optical fiber processing. In addition, the luminescent features of both lanthanide complexes and the resulting hybrid composites were carefully investigated to identify the processes responsible for light emission and to analyze the influence of the PMMA host on light emission intensity and spectral characteristics. The obtained results showed that both lanthanide carboxylate complexes exhibited intense luminescence in the red and green spectral range, typical of europium and terbium dopants, and that those features were well preserved after introducing them into the PMMA polymer. Thermal analysis also proved that introducing the luminescent additives did not significantly affect the thermal properties of both hybrid materials, thus enabling further processing into the form of optical fibers.

An experimental and numerical investigation on the low velocity impact response of thermoplastic hybrid composites

2017 ◽  
Vol 52 (7) ◽  
pp. 877-889 ◽  
Author(s):  
Aswani Kumar Bandaru ◽  
Shivdayal Patel ◽  
Suhail Ahmad ◽  
Naresh Bhatnagar
Keyword(s):  
Finite Element ◽  
Numerical Investigation ◽  
Energy Absorption ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Two Hybrid

This paper presented an experimental and numerical investigation on the low velocity impact response of thermoplastic hybrid composites reinforced with Kevlar/basalt fabrics. Two hybrid and one Kevlar homogeneous composite laminates were manufactured with polypropylene as a resin. In the hybrid composites, one hybrid composite (H-1) was manufactured with alternate stacking of four layers of basalt and four layers of Kevlar and the second hybrid composite (H-2) was manufactured with four Kevlar layers on front face and four basalt layers on back face. Low velocity impact tests were performed using a drop-weight impact equipment at three different energies (25 J, 50 J and 75 J). Among the two hybrid composites H-1 hybrid composite exhibited 15.58–20.79% and 13.47–20.47% improvement in the peak force and energy absorption, respectively, than the H-2 hybrid composite. The peak force and energy absorption of Kevlar homogeneous composite was also improved by 10.07–14.37% and 5.38–11.29%, respectively, due to hybridization. A three dimensional (3D) dynamic finite element software, Abaqus/Explicit, was implemented to simulate the experimental results of low velocity impact tests. A user-defined material subroutine (VUMAT) based on Chang-Chang linear-orthotropic damage model was implemented into the finite element code. The predictions from numerical simulation were found to be in good agreement with the experimental results.

Aligned discontinuous carbon fibre tows in hybrid composites and their tensile behaviour: An experimental study

2019 ◽  
Vol 53 (26-27) ◽  
pp. 3893-3907
Author(s):  
Khong Wui Gan ◽  
You Wei Ho ◽  
Zheng Yang Ow ◽  
Haris Ahmad Israr ◽  
King Jye Wong
Keyword(s):  
Carbon Fibre ◽  
Hybrid Composites ◽  
Cost Effective ◽  
Woven Fabrics ◽  
Thin Layers ◽  
Tensile Behaviour ◽  
Progressive Damage ◽  
Test Results ◽  
Out Of Autoclave ◽  
Two Hybrid

The paper aims to explore potential higher value applications of discontinuous carbon fibre tows. A vibration-assisted dry alignment method is presented to align the discontinuous fibre tows between conventional dry reinforcement mats/fabrics to fabricate cost-effective hybrid composites. Its viability is demonstrated by successful fabrication of two hybrid composite panels, where thin layers of aligned 12 mm discontinuous carbon fibre tows were deposited between E-glass chopped strand mats or woven fabrics respectively, via an out-of-autoclave resin infusion process; 54% and 81% of the fibre tows were aligned in the range of ±5° and ±10°, respectively. The tensile test results clearly demonstrate the importance of having the discontinuous fibre tows highly aligned in the hybrid composites, which shows increased stiffness (up to 24.4%) and strength (up to 59.9%) over the non-aligned hybrid composites. The aligned hybrid composites also exhibit a non-linear pseudo-ductile response due to subcritical progressive damage compared to the catastrophic brittle failure of the baseline non-hybrid E-glass and non-aligned hybrid composites, despite the tensile strength knockdown (up to −40.3%) due to premature inter-tow debonding. They also display increased stiffness up to 90%.

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