Mimicking the humidity response of the plant cell wall by using two-dimensional systems: The critical role of amorphous and crystalline polysaccharides

Elina Niinivaara, Marco Faustini, Tekla Tammelin, Eero Kontturi

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)

Abstract

Of the composite materials occurring in nature, the plant cell wall is among the most intricate, consisting of a complex arrangement of semicrystalline cellulose microfibrils in a dissipative matrix of lignin and hemicelluloses. Here, a biomimetic, two-dimensional cellulose system of the cell wall structure is introduced where cellulose nanocrystals compose the crystalline portion and regenerated amorphous cellulose composes the dissipative matrix. Spectroscopic ellipsometry and QCM-D are used to study the water vapor uptake of several two-layer systems. Quantitative analysis shows that the vapor-induced swelling of these ultrathin films can be controlled by varying ratios of the chemically identical ordered and unordered cellulose components. Intriguingly, increasing the share of crystalline cellulose appeared to increase the vapor uptake but only in cases for which the interfacial area between the crystalline and amorphous area was relatively large and the thickness of an amorphous overlayer was relatively small. The results show that a biomimetic approach may occasionally provide answers as to why certain native structures exist.
Original languageEnglish
Pages (from-to)2032-2040
JournalLangmuir
Volume32
Issue number8
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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polysaccharides
Polysaccharides
cellulose
Cellulose
humidity
Atmospheric humidity
Crystalline materials
biomimetics
Biomimetics
Vapors
vapors
lignin
Spectroscopic ellipsometry
Lignin
Ultrathin films
Steam
matrices
swelling
Nanocrystals
Water vapor

Cite this

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title = "Mimicking the humidity response of the plant cell wall by using two-dimensional systems: The critical role of amorphous and crystalline polysaccharides",
abstract = "Of the composite materials occurring in nature, the plant cell wall is among the most intricate, consisting of a complex arrangement of semicrystalline cellulose microfibrils in a dissipative matrix of lignin and hemicelluloses. Here, a biomimetic, two-dimensional cellulose system of the cell wall structure is introduced where cellulose nanocrystals compose the crystalline portion and regenerated amorphous cellulose composes the dissipative matrix. Spectroscopic ellipsometry and QCM-D are used to study the water vapor uptake of several two-layer systems. Quantitative analysis shows that the vapor-induced swelling of these ultrathin films can be controlled by varying ratios of the chemically identical ordered and unordered cellulose components. Intriguingly, increasing the share of crystalline cellulose appeared to increase the vapor uptake but only in cases for which the interfacial area between the crystalline and amorphous area was relatively large and the thickness of an amorphous overlayer was relatively small. The results show that a biomimetic approach may occasionally provide answers as to why certain native structures exist.",
author = "Elina Niinivaara and Marco Faustini and Tekla Tammelin and Eero Kontturi",
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Mimicking the humidity response of the plant cell wall by using two-dimensional systems: The critical role of amorphous and crystalline polysaccharides. / Niinivaara, Elina; Faustini, Marco; Tammelin, Tekla; Kontturi, Eero.

In: Langmuir, Vol. 32, No. 8, 2016, p. 2032-2040.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Mimicking the humidity response of the plant cell wall by using two-dimensional systems: The critical role of amorphous and crystalline polysaccharides

AU - Niinivaara, Elina

AU - Faustini, Marco

AU - Tammelin, Tekla

AU - Kontturi, Eero

PY - 2016

Y1 - 2016

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AB - Of the composite materials occurring in nature, the plant cell wall is among the most intricate, consisting of a complex arrangement of semicrystalline cellulose microfibrils in a dissipative matrix of lignin and hemicelluloses. Here, a biomimetic, two-dimensional cellulose system of the cell wall structure is introduced where cellulose nanocrystals compose the crystalline portion and regenerated amorphous cellulose composes the dissipative matrix. Spectroscopic ellipsometry and QCM-D are used to study the water vapor uptake of several two-layer systems. Quantitative analysis shows that the vapor-induced swelling of these ultrathin films can be controlled by varying ratios of the chemically identical ordered and unordered cellulose components. Intriguingly, increasing the share of crystalline cellulose appeared to increase the vapor uptake but only in cases for which the interfacial area between the crystalline and amorphous area was relatively large and the thickness of an amorphous overlayer was relatively small. The results show that a biomimetic approach may occasionally provide answers as to why certain native structures exist.

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