scholarly journals Nanoparticle–polymer interfacial layer properties tune fragility and dynamic heterogeneity of athermal polymer nanocomposite films

Soft Matter ◽  
2018 ◽  
Vol 14 (43) ◽  
pp. 8853-8859 ◽  
Author(s):  
Nafisa Begam ◽  
Nimmi Das A ◽  
Sivasurender Chandran ◽  
Mohd Ibrahim ◽  
Venkat Padmanabhan ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Interfacial Layer ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Dynamic Heterogeneity

Enthalpic interactions at the interface between nanoparticles and matrix polymers are known to influence various properties of the resultant polymer nanocomposites (PNC).

Polymer Nanocomposite Films with Functionalized MWCNTs

2013 ◽  
Vol 328 ◽  
pp. 778-783 ◽  
Author(s):  
Anita Grozdanov ◽  
Ana Tomova ◽  
Perica Paunović ◽  
T. Aleksandar Dimitrov
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Nanocomposites ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Specific Interactions ◽  
Dichloromethane Solution ◽  
Biocompatible Polymer ◽  
Mechanical And Structural Properties ◽  
Functionalized Mwcnts

Polymer nanocomposites with carbon nanotubes (CNTs) have become very attractive class of materials for numerous engineering applications since carbon nanotubes exhibit a high aspect ration, unique electrical, mechanical and structural properties. Functionalization of CNTs offer new potentials for other technical challenges of the polymer based nanocomposites associated with their specific interactions. A biocompatible polymer matrices PMMA and PCL were used to provide good interfacial bonding between carbon nanotubes. MWCNT (d=30-50 nm, purity>95%) were used for preparation of polymer based nanocomposites with 0.2, 0.5 and 1.0 % w/w MWCNTs content. PMMA-based nanocomposites were prepared via the mixing of the MWCNT and polymer in a dichloromethane solution for 24 h, while for the PCL-based nanocomposites as a solvent tetrahyrofurane was used. Functionalization of the CNTs was performed in acid (HNO3) and alkali (NH4OH+H2O2) medium as well as by additional thermal oxidation at 490°C. Characterization of the nanocomposite films was performed by DSC, TGA, WAX, FTIR and SEM. The obtained results have shown that introducing MWCNT into polymer matrix significantly changes have been found in the properties of the obtained nanocomposites.

scholarly journals Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2942
Author(s):  
Bhausaheb V. Tawade ◽  
Ikeoluwa E. Apata ◽  
Nihar Pradhan ◽  
Alamgir Karim ◽  
Dharmaraj Raghavan
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Breakdown Strength ◽  
Polymer Nanocomposite ◽  
High Energy ◽  
Polymer Chains ◽  
High Energy Density ◽  
Grafted Nanoparticles ◽  
Grafting From

The synthesis of polymer-grafted nanoparticles (PGNPs) or hairy nanoparticles (HNPs) by tethering of polymer chains to the surface of nanoparticles is an important technique to obtain nanostructured hybrid materials that have been widely used in the formulation of advanced polymer nanocomposites. Ceramic-based polymer nanocomposites integrate key attributes of polymer and ceramic nanomaterial to improve the dielectric properties such as breakdown strength, energy density and dielectric loss. This review describes the ”grafting from” and ”grafting to” approaches commonly adopted to graft polymer chains on NPs pertaining to nano-dielectrics. The article also covers various surface initiated controlled radical polymerization techniques, along with templated approaches for grafting of polymer chains onto SiO2, TiO2, BaTiO3, and Al2O3 nanomaterials. As a look towards applications, an outlook on high-performance polymer nanocomposite capacitors for the design of high energy density pulsed power thin-film capacitors is also presented.

scholarly journals A Review on Polymer Nanocomposites and Their Effective Applications in Membranes and Adsorbents for Water Treatment and Gas Separation

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 139
Author(s):  
Oluranti Agboola ◽  
Ojo Sunday Isaac Fayomi ◽  
Ayoola Ayodeji ◽  
Augustine Omoniyi Ayeni ◽  
Edith E. Alagbe ◽  
...  
Keyword(s):  
Greenhouse Gases ◽  
Polymer Nanocomposites ◽  
Gas Separation ◽  
Rapid Growth ◽  
Dye Removal ◽  
Anthropogenic Activities ◽  
Polymer Nanocomposite ◽  
Population Increase ◽  
Nanocomposite Membranes

Globally, environmental challenges have been recognised as a matter of concern. Among these challenges are the reduced availability and quality of drinking water, and greenhouse gases that give rise to change in climate by entrapping heat, which result in respirational illness from smog and air pollution. Globally, the rate of demand for the use of freshwater has outgrown the rate of population increase; as the rapid growth in town and cities place a huge pressure on neighbouring water resources. Besides, the rapid growth in anthropogenic activities, such as the generation of energy and its conveyance, release carbon dioxide and other greenhouse gases, warming the planet. Polymer nanocomposite has played a significant role in finding solutions to current environmental problems. It has found interest due to its high potential for the reduction of gas emission, and elimination of pollutants, heavy metals, dyes, and oil in wastewater. The revolution of integrating developed novel nanomaterials such as nanoparticles, carbon nanotubes, nanofibers and activated carbon, in polymers, have instigated revitalizing and favourable inventive nanotechnologies for the treatment of wastewater and gas separation. This review discusses the effective employment of polymer nanocomposites for environmental utilizations. Polymer nanocomposite membranes for wastewater treatment and gas separation were reviewed together with their mechanisms. The use of polymer nanocomposites as an adsorbent for toxic metals ions removal and an adsorbent for dye removal were also discussed, together with the mechanism of the adsorption process. Patents in the utilization of innovative polymeric nanocomposite membranes for environmental utilizations were discussed.

Magnetic polymer nanocomposite-supported Pd: an efficient and reusable catalyst for the Heck and Suzuki reactions in water

2015 ◽  
Vol 39 (3) ◽  
pp. 2052-2059 ◽  
Author(s):  
Dongfang Wang ◽  
Wendong Liu ◽  
Fengling Bian ◽  
Wei Yu
Keyword(s):  
Polymer Nanocomposites ◽  
Polymer Nanocomposite ◽  
Recyclable Catalyst ◽  
Water Phase ◽  
Reusable Catalyst ◽  
Suzuki Reactions ◽  
Supported Pd

Pd supported on magnetic polymer nanocomposites serves as an efficient and recyclable catalyst for the water-phase Heck and Suzuki reactions.

Interfacial reflection enhanced optical extinction and thermal dynamics in polymer nanocomposite films

2016 ◽  
Author(s):  
Jeremy R. Dunklin ◽  
Gregory T. Forcherio ◽  
Keith R. Berry ◽  
D. Keith Roper
Keyword(s):  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Thermal Dynamics ◽  
Optical Extinction

scholarly journals Recent Advances in Nanocomposites Based on Aliphatic Polyesters: Design, Synthesis, and Applications in Regenerative Medicine

2018 ◽  
Vol 8 (9) ◽  
pp. 1452 ◽  
Author(s):  
Ilaria Armentano ◽  
Matteo Gigli ◽  
Francesco Morena ◽  
Chiara Argentati ◽  
Luigi Torre ◽  
...  
Keyword(s):  
Stem Cell ◽  
Regenerative Medicine ◽  
Polymer Nanocomposites ◽  
Recent Progress ◽  
Polymer Nanocomposite ◽  
Synthesis Methods ◽  
Aliphatic Polyester ◽  
Aliphatic Polyesters ◽  
Design Synthesis ◽  
Matrix Properties

In the last decade, biopolymer matrices reinforced with nanofillers have attracted great research efforts thanks to the synergistic characteristics derived from the combination of these two components. In this framework, this review focuses on the fundamental principles and recent progress in the field of aliphatic polyester-based nanocomposites for regenerative medicine applications. Traditional and emerging polymer nanocomposites are described in terms of polymer matrix properties and synthesis methods, used nanofillers, and nanocomposite processing and properties. Special attention has been paid to the most recent nanocomposite systems developed by combining alternative copolymerization strategies with specific nanoparticles. Thermal, electrical, biodegradation, and surface properties have been illustrated and correlated with the nanoparticle kind, content, and shape. Finally, cell-polymer (nanocomposite) interactions have been described by reviewing analysis methodologies such as primary and stem cell viability, adhesion, morphology, and differentiation processes.

A closed-form model for estimating the effective thermal conductivities of carbon nanotube–polymer nanocomposites

2018 ◽  
Vol 233 (8) ◽  
pp. 2909-2919 ◽  
Author(s):  
Reza Moheimani ◽  
M Hasansade
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Closed Form ◽  
Polymer Nanocomposites ◽  
Micromechanical Model ◽  
Polymer Nanocomposite ◽  
Interfacial Thermal Resistance ◽  
Full Potential ◽  
Thermal Conductivities

This paper describes a closed-form unit cell micromechanical model for estimating the effective thermal conductivities of unidirectional carbon nanotube reinforced polymer nanocomposites. The model incorporates the typically observed misalignment and curvature of carbon nanotubes into the polymer nanocomposites. Also, the interfacial thermal resistance between the carbon nanotube and the polymer matrix is considered in the nanocomposite simulation. The micromechanics model is seen to produce reasonable agreement with available experimental data for the effective thermal conductivities of polymer nanocomposites reinforced with different carbon nanotube volume fractions. The results indicate that the thermal conductivities are strongly dependent on the waviness wherein, even a slight change in the carbon nanotube curvature can induce a prominent change in the polymer nanocomposite thermal conducting behavior. In general, the carbon nanotube curvature improves the nanocomposite thermal conductivity in the transverse direction. However, using the straight carbon nanotubes leads to maximum levels of axial thermal conductivities. With the increase in carbon nanotube diameter, an enhancement in nanocomposite transverse thermal conductivity is observed. Also, the results of micromechanical simulation show that it is necessary to form a perfectly bonded interface if the full potential of carbon nanotube reinforcement is to be realized.

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