Visualization and characterization of 3D structure of Fibrous porous bio-based materials, and their relationship to properties and performance

Sahana Ramanna, Yves Defrenne, Vasa Zhdankin, Bandaru V. Ramarao, Harshad Pande, Shri Ramaswamy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Fibrous materials such as paper, board, and bio-based composites have complex 3-D internal structures. X-ray computed tomography (XRCT) at the micron and sub-micron scale is a viable technique for visualizing and characterizing the internal three dimensional structures of fibrous materials. XRCT can be used as a non-invasive method to determine the pore structure characteristics including porosity, fiber-pore interfacial surface area, pore size distribution and tortuosity in three dimensions. Comparison of the 3D pore size distributions between handsheets prepared under different conditions showed that as the degree of mechanical refining of fibers is increased, the pore sizes decrease along with a narrowing of the distributions. The effects of fiber species and papermaking process variables such as wet-pressing on the 3D internal structure are also shown. Comparison with conventional techniques shows the advantages of the XRCT based structural characterization. In addition, methods to determine the vapor, liquid transport and mechanical properties of paper and board using actual 3D structures show the versatility and wide ranging applications of this technique. While structure plays a significant role in affecting moisture transport resulting in anisotropic behavior, interestingly, above a certain value for fiber space conductivity, porous materials, which are initially anisotropic, behave more like an isotropic material.

Original languageEnglish (US)
Title of host publicationPaper Conference and Trade Show, PaperCon 2017
Subtitle of host publicationRenew, Rethink, Redefine the Future
PublisherTAPPI Press
Pages906-911
Number of pages6
ISBN (Electronic)9781510847286
StatePublished - Jan 1 2017
EventPaper Conference and Trade Show: Renew, Rethink, Redefine the Future, PaperCon 2017 - Minneapolis, United States
Duration: Apr 23 2017Apr 26 2017

Publication series

NamePaper Conference and Trade Show, PaperCon 2017: Renew, Rethink, Redefine the Future
Volume2

Other

OtherPaper Conference and Trade Show: Renew, Rethink, Redefine the Future, PaperCon 2017
CountryUnited States
CityMinneapolis
Period4/23/174/26/17

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  • Cite this

    Ramanna, S., Defrenne, Y., Zhdankin, V., Ramarao, B. V., Pande, H., & Ramaswamy, S. (2017). Visualization and characterization of 3D structure of Fibrous porous bio-based materials, and their relationship to properties and performance. In Paper Conference and Trade Show, PaperCon 2017: Renew, Rethink, Redefine the Future (pp. 906-911). (Paper Conference and Trade Show, PaperCon 2017: Renew, Rethink, Redefine the Future; Vol. 2). TAPPI Press.