Filler-nanocellulose substrate for printed electronics: Experiments and model approach to structure and conductivity

A. Penttilä (Corresponding Author), Jenni Sievänen, Katariina Torvinen, Kimmo Ojanperä, Jukka Ketoja

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)

Abstract

Composites made of inorganic filler particles and cellulose nanofibres can be applied as substrates for printed electronics. We have studied the structural properties of these substrates both experimentally and with particle-level modeling approach. Our model describes the skeleton structure formed by pigment particles of varied shapes and size distributions. Nanocellulose is assumed to fill voids of the structure. The model simulations predict quite well the relative changes in measured density, porosity and roughness for kaolin and precipitated calcium carbonate (PCC) pigments. Measured roughness turns out to be higher for kaolin than for PCC. Yet, the measured conductivity of printed lines on kaolin surface is higher than the conductivity on the PCC surface. The simulations reveal a more open surface pore structure for PCC than for kaolin, which leads to stronger absorption of the silver ink, and thus explains the differences in the measured conductivities.
Original languageEnglish
Pages (from-to)1413-1424
Number of pages12
JournalCellulose
Volume20
Issue number3
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • conductivity
  • nano fibrillated cellulose
  • pigment particle
  • porosity
  • printed electronics
  • roughness

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