Reduced percolation threshold of conductive adhesive through nonuniform filler localization: Monte Carlo simulation and experimental study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F21%3A63542698" target="_blank" >RIV/70883521:28610/21:63542698 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/70883521:28110/21:63542698

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0266353821003201" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0266353821003201</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.compscitech.2021.108964" target="_blank" >10.1016/j.compscitech.2021.108964</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Reduced percolation threshold of conductive adhesive through nonuniform filler localization: Monte Carlo simulation and experimental study

Popis výsledku v původním jazyce

Adhesive nickel based polymer composites were investigated experimentally and by computational modelling with respect to optimization of electrical and mechanical properties. Utilization of polymer blends with an optimized combination of epoxy resin (ER) and polydimethylsiloxane (PDMS) resulted in a reduced electrical percolation threshold (EPT) from 7.9 up to 3.7 vol % of Ni and increased the direct current (DC) conductivity of the composites by 7 orders of magnitude. At the same time, adhesion of the composites was enhanced by 20% and impact strength by 75% due to the PDMS addition. The observed effect of the EPT reduction is determined by the preferred localization of conductive Ni particles near the ER phase, specifically on the ER/PDMS interface. Prior to the composite preparation, the polymer composites were simulated by the Monte Carlo method and were evaluated by two independent methods: i) the growth of the conductive networks was examined by the size of aggregates via aggregation number (script in Python) ii) the conductivity of the polymer composites was calculated via finite element method (FEM, Digimat-FE 6.1.1). The computational simulations correlated well with the experimentally determined EPT and conductivity of the polymer composites.

Název v anglickém jazyce

Reduced percolation threshold of conductive adhesive through nonuniform filler localization: Monte Carlo simulation and experimental study

Popis výsledku anglicky

Adhesive nickel based polymer composites were investigated experimentally and by computational modelling with respect to optimization of electrical and mechanical properties. Utilization of polymer blends with an optimized combination of epoxy resin (ER) and polydimethylsiloxane (PDMS) resulted in a reduced electrical percolation threshold (EPT) from 7.9 up to 3.7 vol % of Ni and increased the direct current (DC) conductivity of the composites by 7 orders of magnitude. At the same time, adhesion of the composites was enhanced by 20% and impact strength by 75% due to the PDMS addition. The observed effect of the EPT reduction is determined by the preferred localization of conductive Ni particles near the ER phase, specifically on the ER/PDMS interface. Prior to the composite preparation, the polymer composites were simulated by the Monte Carlo method and were evaluated by two independent methods: i) the growth of the conductive networks was examined by the size of aggregates via aggregation number (script in Python) ii) the conductivity of the polymer composites was calculated via finite element method (FEM, Digimat-FE 6.1.1). The computational simulations correlated well with the experimentally determined EPT and conductivity of the polymer composites.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/LTAUSA19066" target="_blank" >LTAUSA19066: Studium polymerních memristorů založených na metakrylátových polymerech s karbazolovými bočními skupinami</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Composites Science and Technology

ISSN

0266-3538

e-ISSN

—

Svazek periodika

214

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

000693454800001

EID výsledku v databázi Scopus

2-s2.0-85111559638