Dielectric Properties of Sustainable Nanocomposites Based on Zein Protein and Lignin for Biodegradable Insulators

Two types of lignin, alkali lignin and lignosulfonic acid sodium salt, are blended into thermoplastic zein through melt mixing in order to develop biodegradable insulator materials for multifunctional applications in electronics. The effects of lignin type and content on the dielectric properties of...

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Bibliographic Details
Published in:Advanced functional materials 2017-02, Vol.27 (8), p.np-n/a
Main Authors: Oliviero, Maria, Rizvi, Reza, Verdolotti, Letizia, Iannace, Salvatore, Naguib, Hani E., Di Maio, Ernesto, Neitzert, Heinz C., Landi, Giovanni
Format: Article
Language:English
Subjects:
Biodegradability
biodegradable‐insulators
Derivatives
Dielectric properties
Dielectrics
Electronics
Glass transition temperature
High frequencies
Insulators
Lignin
lignins
Lithosphere
Materials science
Nanocomposites
Permittivity
Sodium
Sustainability
Thermoplastic resins
transient electronics
Zein
zein protein
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Summary:Two types of lignin, alkali lignin and lignosulfonic acid sodium salt, are blended into thermoplastic zein through melt mixing in order to develop biodegradable insulator materials for multifunctional applications in electronics. The effects of lignin type and content on the dielectric properties of the resulting bio‐nanocomposites are investigated. The results indicate that, by modifying the structural arrangement of the zein with the use of lignin, it is possible to obtain bio‐nanocomposites characterized by tunable dielectric properties. The bio‐nanocomposites containing low amounts of lignin derivatives exhibit extensive protein structural changes together with a modification of the dielectric properties compared to the pristine thermoplastic zein. Changes in the dielectric properties of these systems are also observed to change over time, indicating a loss of plasticizer, as is evident by a decrease in the glass‐transition temperature. At high frequencies, the resulting values of the dielectric permittivity and of the loss tangent demonstrate that the bio‐nanocomposite can be used as biodegradable dielectric material for transient (temporary) electronics. Zein‐based bio‐nanocomposites as biodegradable dielectric materials for transient (temporary) electronics are investigated. The dielectric properties of the bio‐nanocomposites can be tailored by modulating the composition and the typology of the lignin derivatives (i.e., alkali lignin and lignosulfonic acid sodium).
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201605142