Heat generation and conduction in PDMS-carbon nanoparticle membranes irradiated with optical fibers

Vélez-Cordero, J. Rodrigo; Hernández‐Cordero, Juan

doi:10.1016/j.ijthermalsci.2015.04.009

Cited by 80 publications

(42 citation statements)

References 38 publications

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“…,: limsans-serifβ→∞β2e−sans-serifβz=sans-serifδ(z), where sans-serifδ(z) is the delta function. Using this formulation and some integral formulas [9], we can obtain analytical solutions for ΔT at points of interest. For example, the transient ΔT at the point located at the rear surface exactly opposing the beam axis ( r = 0) impinging on a membrane in which CNP are mixed with the PDMS has the form [9]: ΔT(L,t)axis=(1−ℛ)AβIo2k∑n=1∞I1(λn)N(λn)[λncos(λnL)+H1sin(λnL)]eλn2A4…”

Section: Methodsmentioning

confidence: 99%

“…A final note should be given concerning the heat transfer coefficients h1,2 and their roles when comparing theoretical and experimental results. If the temperature is measured by non-contact devices (e.g., with an IR camera), h1,2 are easily known since they must correspond to the value of heat convection in air (~O(10) W/m2K); however, if ΔT is measured with contact devices (thermocouples, resistive temperature sensors), h2 will be larger, and usually unknown because direct contact with the membrane adds an additional dissipation and interfacial resistance [9].…”

Section: Methodsmentioning

confidence: 99%

“…PDMS has been widely used due to its remarkable thermal, rheological, mechanical and biological properties [ 5 , 6 , 7 ]. The inclusion of carbon nanoparticles and nanotubes in PDMS membranes has led to obtaining photothermal effects, owing to the enhanced optical absorption observed in carbon-based nanostructures and the subsequent heat dissipation within the host polymer matrix [ 8 , 9 , 10 , 11 ]. When irradiated with low power laser light, either focused or guided by an optical fiber, these PDMS-carbon composites show highly localized thermal effects leading to applications such as laser-assisted microfabrication and optomechanical deformation [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Photothermal Effects and Applications of Polydimethylsiloxane Membranes with Carbon Nanoparticles

et al. 2016

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Abstract:The advent of nanotechnology has triggered novel developments and applications for polymer-based membranes with embedded or coated nanoparticles. As an example, interaction of laser radiation with metallic and carbon nanoparticles has shown to provide optically triggered responses in otherwise transparent media. Incorporation of these materials inside polymers has led to generation of plasmonic and photothermal effects through the enhanced optical absorption of these polymer composites. In this work, we focus on the photothermal effects produced in polydimethylsiloxane (PDMS) membranes with embedded carbon nanoparticles via light absorption. Relevant physical parameters of these composites, such as nanoparticle concentration, density, geometry and dimensions, are used to analyze the photothermal features of the membranes. In particular, we analyze the heat generation and conduction in the membranes, showing that different effects can be achieved and controlled depending on the physical and thermal properties of the composite material. Several novel applications of these light responsive membranes are also demonstrated, including low-power laser-assisted micro-patterning and optomechanical deformation. Furthermore, we show that these polymer-nanoparticle composites can also be used as coatings in photonic and microfluidic applications, thereby offering an attractive platform for developing light-activated photonic and optofluidic devices.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photothermal Effects and Applications of Polydimethylsiloxane Membranes with Carbon Nanoparticles

et al. 2016

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“…Interesting photoresponsive materials can be obtained from polymer/carbon nanocomposites . The inclusion of carbon nanoparticles, nanotubes, and nanosheets in polymer membranes allows a high localized photothermal effect, due to the optical absorption by carbon atoms and fast thermal energy dissipation in the polymer film . These polymer/carbon nanocomposites can be used as optomechanically deformable materials …”

Section: Light‐driven Functionsmentioning

confidence: 99%

Light‐Responsive Polymer Membranes

Pantuso

Filpo

Nicoletta

2019

Advanced Optical Materials

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Stimuli‐responsive polymer membranes have gained particular attention for the ability to tune opportunely their physicochemical properties under the application of an external stimulus. Heat, pH value, ionic strength, pressure, humidity, electric and magnetic fields, antigen/antibody interactions, chemical reactions, and light can be used as triggers for specific responses in polymer membranes. In particular, light is a fascinating stimulus, as it is a green energy, which can be modulated in a precise and convenient way. In addition, it allows remote and contactless interactions without changing the original chemical environment. This review reports recent progresses in light‐responsive polymer membranes with particular attention to chemical groups and responsive mechanisms.

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“…When the sunlight shines on the carbon-based material, the electrons are excited from valence band to conduction band. The excited electrons are relaxed by electron-phonon coupling, so the absorbed solar energy is transferred from the excited electrons to the vibration of the whole lattice, resulting in the rise of material temperature [54].…”

Section: Introductionmentioning

confidence: 99%

Solar-driven steam generation on nitrogen-doped graphene in a 2D water path isolation system

Chen

Sha

Wang

et al. 2020

Mater. Res. Express

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Solar-driven steam generation using photothermal materials is a green and promising approach to address clean water scarcity. In this work, the graphene oxide(GO) was synthesized by an improved Hummers method, and then GO was reduced by hydrothermal method and modified with nitrogen, called as NRGO. Then, we performed UV-VIS-NIR, XRD, Raman, FTIR and SEM characterization. In order to reduce the heat loss of bulk working liquid and improve the solar-to-heat conversion efficiency, the isolation system with 2D water path was used. The efficiency test of steam generation was performed under the solar intensity of 1000 Wm −2 for 1 h, and the photothermal conversion efficiency of reduced graphene oxide (RGO) and nitrogen-doped graphene (NRGO) was 73% and 87%, respectively. It was found that NRGO owned better solar absorption efficiency, lower thermal conductivity and porosity. NRGO was combined with insulated isolated system which can reduce the heat loss of bulk water, to improve photothermal conversion efficiency.

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Heat generation and conduction in PDMS-carbon nanoparticle membranes irradiated with optical fibers

Cited by 80 publications

References 38 publications

Photothermal Effects and Applications of Polydimethylsiloxane Membranes with Carbon Nanoparticles

Photothermal Effects and Applications of Polydimethylsiloxane Membranes with Carbon Nanoparticles

Light‐Responsive Polymer Membranes

Solar-driven steam generation on nitrogen-doped graphene in a 2D water path isolation system

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