Dielectric spectroscopic studies of biological material evolution and application to paper, TAPPI JOURNAL September 2018



ABSTRACT: Current product composition and quality test methods for the paper and pulp industry are mainly based on manual ex-situ wet-bench chemistry techniques. For example, the standard method for determining the furnish of paper, TAPPI T 401 “Fiber analysis of paper and paperboard,” relies on the experience and visual acuity of a specially trained analyst to determine the individual plant species present and to quantify the amount of each constituent fiber type in a sheet of paper. Thus, there is a need for a fast, nondestructive analytical technique that leverages intrinsic attributes of the analytes. 

In this paper, we demonstrate an application of dielectric spectroscopy (DS) as a potential metrology to differentite between nonwood pulp and wood pulp fibers. This in-situ, noncontact  and nondestructive assessment method has inherent forensic capabilities and is also amiable to quality assurance techniques such as gauge capability studies and real-time statistical process control (SPC).  

Application: The dielectric spectroscopy results presented in this paper can nondestructively determine the amount of lignin in paper products and are in principle comparable to the performance specifications of the TAPPI Standard Test Method T 401. This DS method should enable the sources of printing substrates to be both authentiated and validated in real time in a paper testing laboratory environment.

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Author: M. Kombolias, J. Obrzut, K. Montgomery, M. T. Postek, D. L. Poster, and Y. S. Obeng
Dielectric spectroscopic studies of biological material evol
Dielectric spectroscopic studies of biological material evolution and application to paper, TAPPI JOURNAL September 2018
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