Name: strain sensing based on multiscale composite materials reinforced with graphene nanoplatelets
Uploaded: 2016-11-07T13:00:00
Description: Watch this Scientific Journal Video about Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets at JoVE.com

Forfatterne vil gerne anerkende Ministerio de Economía y Competitividad Spaniens regering (Project MAT2013-46695-C3-1-R) og Comunidad de Madrid regering (P2013 / MIT-2862).

1. Forberedelse af funktionaliseret Graphene Nanoplatelet Fyldt Epoxy for multiscale Composite Materials <ol><li> Disperse funktionaliserede graphene nanoplatelets (f-BNI) ind i epoxyharpiks. <ol><li> Afvej 24,00 g f-BNP til opnåelse af en 12 vægt-% af den endelige nanokompositmateriale inde i en ductless stinkskab. </li><li> Tilføj 143,09 g af bisphenol A-diglycidylether (DGEBA) monomer og manuelt blande det at opnå homogenitet. </li><li> Sprede f-BNI i monomerblandingen ved en TwoStep fremgangsm...

<ol>
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M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+role+of+irreversible+and+reversible+phenomena+in+the+piezoresistive+behavior+of+graphene+epoxy+nanocomposites+applied+to+structural+health+monitoring.">The role of irreversible and reversible phenomena in the piezoresistive behavior of graphene epoxy nanocomposites applied to structural health monitoring.</a> Compos Sci Technol. 80, 73-79 (2013).</li><li>Le, J., Du, H., Dai, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Use+of+2D+Graphene+Nanoplatelets+(GNP)+in+cement+composites+for+structural+health+evaluation.">Use of 2D Graphene Nanoplatelets (GNP) in cement composites for structural health evaluation.</a> Compos Part B. 67, 555-563 (2014).</li><li>Ren, X., Burton, J., Seidel, G. 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Self-sensor egenskaber nanoreinforced kompositmaterialer skyldes det elektriske netværk oprettet af f-BNI gennem epoxymatrix og langs glasfibre, som er modificeret, når stamme induceres. Dispersion af f-BNI er så afgørende, fordi den elektriske opførsel af sensorerne stærkt afhænger af mikrostruktur af materialet. Her præsenterer vi en optimeret fremgangsmåde til at opnå en god dispersion af BNI til epoxyen matrix og undgå rynkedannelse af nanopartiklerne, hvilket forårsager skade for den elektriske lednings...

Strukturel sundhedsovervågning (SHM) er blevet mere vigtig på grund af behovet for at kende den resterende levetid for konstruktioner 1-3. I dag, svært tilgængelige steder, såsom offshore vind planter, føre til højere risici i vedligeholdelse samt større omkostninger 2-4. Self-sensing materialer udgør en af mulighederne inden for SHM på grund af deres evne til egenkontrol stamme og skader fem. I tilfælde af vindturbiner, er bladene generelt fremstillet i glasfiber / epoxy kompositmaterialer, som er elektrisk isolatorer. For at bibringe selv-sensing egenskaber til dette kompositmateriale, til en iboende elektriske netværk modtagelige stamme og skader skal oprettes. I løbet af de sidste par år, inkorporeringen af ledende nanopartikler såsom sølv nanotråde 6,7, kulstofnanorør (CNTs) 8-10, og graphene nanoplatelets (BNI) 11-13er blevet undersøgt for at skabe denne elektriske netværk. Disse nanopartikler kan inkorporeres i systemet som fyldstof i polymermatrixen eller ved at coate stof glasfiberen 14. Disse materialer kan også anvendes på andre industrielle områder, dvs, rumfart, bilindustrien og anlægsarbejde 5, og belagt stoffer kan anvendes som smarte materialer i biomekaniske applikationer 7,15. Piezoresistivity af disse sensorer opnås ved tre forskellige bidrag. Det første bidrag er den iboende piezoresistivity af nanopartikler; en stamme af strukturen ændrer den elektriske ledningsevne af nanopartiklerne. De vigtigste bidrag er imidlertid ændringer i tunnel elektrisk modstand, på grund af ændringer i afstande mellem tilstødende nanopartikler og elektrisk kontakt modstand, på grund af variationer i kontaktområdet mellem overliggende dem 9. Denne piezoresistivity er højere, når 2D nanoparticles anvendes som en nanofiller forhold til 1D nanopartikler fordi det elektriske net præsenterer en højere modtagelighed for geometriske ændringer og diskontinuiteter, sædvanligvis én størrelsesorden superior 16. På grund af den 2D atomare karakter 17 og den høje elektriske ledningsevne 18,19, er blevet udvalgt graphene nanoplatelets i dette arbejde som nano-forstærker af multiscale kompositmaterialer for at opnå selv-sensorer med forøget følsomhed. To forskellige måder at optage de BNI i kompositmaterialet studeres med henblik på at belyse eventuelle forskelle i sensing mekanismer og følsomhed.

<table border="0" cellpadding="0" cellspacing="0" width="816">
	<colgroup>
		<col />
		<col />
		<col />
		<col />
	</colgroup>
	<tbody>
		<tr height="22">
			<td height="22" style="height:22px;width:217px;">Graphene Nanoplatelets</td>
			<td style="width:113px;">XGScience</td>
			<td style="width:319px;">M25</td>
			<td style="width:167px;">NA</td>
		</tr>
		<tr height="21">
			<td height="42" rowspan="2" style="height:42px;width:217px;">Epoxy resin&#160;</td>
			<td rowspan="2" style="width:113px;">Huntsman</td>
			<td style="width:319px;">Araldite LY556</td>
			<td>NA</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:319px;">XB3473</td>
			<td>NA</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:217px;">Probe sonication</td>
			<td>Hielscher&#160;</td>
			<td>UP400S&#160;</td>
			<td>NA</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:217px;">Three roll mill</td>
			<td style="width:113px;">Exakt</td>
			<td>Exakt 80E (Exakt GmbH)</td>
			<td>NA</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:217px;">Glass fiber fabric</td>
			<td style="width:113px;">Hexcel</td>
			<td>HexForce &#174; 01031 1000 TF970 E UD 4H&#160;</td>
			<td>NA</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:217px;">Hot plate press</td>
			<td style="width:113px;">Fontijne&#160;</td>
			<td>Fontijne LabEcon300</td>
			<td>NA</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:217px;">Sizing</td>
			<td style="width:113px;">Nanocyl</td>
			<td>SizicylTM</td>
			<td>NA</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:217px;">Multimeter</td>
			<td style="width:113px;">Alava Ingenieros</td>
			<td>Agilent 34410A&#160;</td>
			<td>NA</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:217px;">Strain Gauges</td>
			<td style="width:113px;">Vishay</td>
			<td>Micro-Measurement (MM&#174;) CEA-06-187UW-120&#160;</td>
			<td>NA</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:217px;">Mechanical tests machine</td>
			<td style="width:113px;">Zwick</td>
			<td>Zwick/Roell 100&#160;kN</td>
			<td>NA</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:217px;">Conductive silver paint</td>
			<td style="width:113px;">Monocomp</td>
			<td style="width:319px;">16062 &#8211; PELCO&#174; Conductive Silver Paint</td>
			<td>NA</td>
		</tr>
	</tbody>
</table>

strain sensing based on multiscale composite materials reinforced with graphene nanoplatelets

Den elektriske reaktion NH2 -funktionaliserede graphene nanoplatelets kompositmaterialer under stamme blev undersøgt. Der foreslås to forskellige fremstillingsmetoder til at skabe det elektriske net i dette værk: (a) inkorporering af nanoplatelets til epoxyen matrix og (b) coating af glasvæv med en dimensionering fyldt med de samme nanoplatelets. Begge typer multiscale kompositmaterialer, med en in-plane elektriske ledningsevne ~ 10 -3 S / m, viste en eksponentiel vækst af den elektriske modstand som strain øges som følge afstand mellem hosliggende funktionaliserede graphene nanoplatelets og kontaktpunkt tab mellem overliggende dem. Følsomheden af ​​de analyserede under denne forskning under anvendelse af de beskrevne procedurer materialer, har vist sig at være højere end kommercielt tilgængelige strain gauges. De foreslåede procedurer for selvstændige sansning af den strukturelle kompositmateriale vil lette den strukturelle sundhed monitoring af komponenter i svært tilgængelige standpladser såsom offshore vindkraft gårde. Selv følsomheden af de multiscale kompositmaterialer var betydeligt højere end følsomheden af metalliske folier som strain gauges, værdien nåede med NH 2 funktionaliserede graphene nanoplatelets belagte stoffer var næsten en størrelsesorden overlegen. Dette resultat belyst deres potentiale til at blive brugt som smarte tekstiler til overvågning menneskelige bevægelser som bøjning af fingre eller knæ. Ved at bruge den foreslåede metode, kunne den smarte stof øjeblikkeligt at identificere bøjning og inddrive det samme. Dette faktum muliggør præcis overvågning af tiden for bøjning samt graden af ​​bøjning.

<html> Protokollen til opnåelse af to forskellige materialer er blevet beskrevet i proceduren. Forskellen ligger i den måde, nanoreinforcement inkorporeres i det sammensatte materiale for at opnå et elektrisk netværk, der kunne bruges til at stamme overvågning. Den første metode består i belægning af et glasfibervæv med f-BNI dimensionering, der kan bruges som en smart stof (opkaldt f-BNP / glasfiber) eller som forstærkning af polymer matrix multiscale kompositmaterialer (opkald...

Watch this Scientific Journal Video about Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets at JoVE.com

Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets

Integrationen af ​​ledende nanopartikler, såsom graphene nanoplatelets, i glas fiber kompositmaterialer skaber en iboende elektriske netværk modtagelige for stamme. Her, at forskellige metoder opnå strain sensorer baseret på tilsætning af graphene nanoplatelets til epoxyen matrix eller som en belægning på glasvæv foreslås.

Strain Sensing Baseret på multiscale Composite Materials Forstærket med Graphene Nanoplatelets

The electrical response of NH2-functionalized graphene nanoplatelets composite materials under strain was studied. Two different manufacturing methods are ...

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Efforts to assemble graphene into three-dimensional monolithic structures have been hampered by the high cost and poor processability of graphene. ...

Experimental Protocol to Determine the Chloride Threshold Value for Corrosion in Samples Taken from Reinforced Concrete Structures

Eksperimentel protokol til at bestemme chlorid tærskelværdien for korrosion i prøver udtaget af jernbeton strukturer

The aging of reinforced concrete infrastructure in developed countries imposes an urgent need for methods to reliably assess the condition of these ...

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior

Forberedelse af justeret stål Fiber forstærket cementbundne Composite og dets bøjnings opførsel

The aim of this work is to present an approach, inspired by the way in which a compass needle maintains a consistent orientation under the action of the ...

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Multiscale strukturer kvadratnetceller påtrykt Nanofibers for funktionelle overflader

Multiscale surface structures have attracted increasing interest owing to several potential applications in surface devices. However, an existing ...

Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

Forberedelse af Graphene væske celler til iagttagelse af Lithium-ion batteri materiale

In this work, we introduce the preparation of graphene liquid cells (GLCs), encapsulating both electrode materials and organic liquid electrolytes between ...

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Teoretisk beregning og eksperimentel verifikation for dislokationsreduktion i germaniumepitaksiale lag med semicylindriske hulrum på silicium

Reduction of threading dislocation density (TDD) in epitaxial germanium (Ge) on silicon (Si) has been one of the most important challenges for the ...

Production of a Strain-Measuring Device with an Improved 3D Printer

Produktion af en strain-måleenhed med en forbedret 3D-printer

A traditional strain measurement sensor needs to be electrified and is susceptible to electromagnetic interference. In order to solve the fluctuations in ...

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

In Situ Transmission Electron Mikroskopi med biasing og fremstilling af asymmetriske overliggere baseret på blandet faset en-VOx

Resistive switching crossbar architecture is highly desired in the field of digital memories due to low cost and high-density benefits. Different ...

Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight

Avanceret selvhelbredende asfalt forstærket af grafenstrukturer: En atomistisk indsigt

Graphene can improve the self-healing properties of asphalt with high durability. However, the self-healing behaviors of graphene-modified asphalt ...