Effect of interfibrillar PVA bridging on water stability and mechanical properties of TEMPO/NaClO2 oxidized cellulosic nanofibril films

Minna Hakalahti, Arto Salminen, Jukka Seppälä, Tekla Tammelin, Tuomas Hänninen

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

TEMPO/NaClO2 oxidized cellulosic nanofibrils (TCNF) were covalently bonded with poly(vinyl alcohol) (PVA) to render water stable films. Pure TCNF films and TCNF-PVA films in dry state showed similar humidity dependent behavior in the elastic region. However, in wet films PVA had a significant effect on stability and mechanical characteristics of the films. When soaked in water, pure TCNF films exhibited strong swelling behavior and poor wet strength, whereas covalently bridged TCNF-PVA composite films remained intact and could easily be handled even after 24 h of soaking. Wet tensile strength of the films was considerably enhanced with only 10 wt% PVA addition. At 25% PVA concentration wet tensile strengths were decreased and films were more yielding. This behavior is attributed to the ability of PVA to reinforce and plasticize TCNF-based films. The developed approach is a simple and straightforward method to produce TCNF films that are stable in wet conditions.
Original languageEnglish
Pages (from-to)78-82
JournalCarbohydrate Polymers
Volume126
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

Mechanical properties
Water
Tensile strength
TEMPO
Composite films
Swelling
Atmospheric humidity
Alcohols

Keywords

  • TEMPO oxidized cellulose nanofibrils
  • film
  • poly(vinyl alcohol)
  • water stable
  • mechnaical properties

Cite this

@article{6fef41d96d184b2498ec76bdbf939437,
title = "Effect of interfibrillar PVA bridging on water stability and mechanical properties of TEMPO/NaClO2 oxidized cellulosic nanofibril films",
abstract = "TEMPO/NaClO2 oxidized cellulosic nanofibrils (TCNF) were covalently bonded with poly(vinyl alcohol) (PVA) to render water stable films. Pure TCNF films and TCNF-PVA films in dry state showed similar humidity dependent behavior in the elastic region. However, in wet films PVA had a significant effect on stability and mechanical characteristics of the films. When soaked in water, pure TCNF films exhibited strong swelling behavior and poor wet strength, whereas covalently bridged TCNF-PVA composite films remained intact and could easily be handled even after 24 h of soaking. Wet tensile strength of the films was considerably enhanced with only 10 wt{\%} PVA addition. At 25{\%} PVA concentration wet tensile strengths were decreased and films were more yielding. This behavior is attributed to the ability of PVA to reinforce and plasticize TCNF-based films. The developed approach is a simple and straightforward method to produce TCNF films that are stable in wet conditions.",
keywords = "TEMPO oxidized cellulose nanofibrils, film, poly(vinyl alcohol), water stable, mechnaical properties",
author = "Minna Hakalahti and Arto Salminen and Jukka Sepp{\"a}l{\"a} and Tekla Tammelin and Tuomas H{\"a}nninen",
note = "SDA: SHP: Bioeconomy",
year = "2015",
doi = "10.1016/j.carbpol.2015.03.007",
language = "English",
volume = "126",
pages = "78--82",
journal = "Carbohydrate Polymers",
issn = "0144-8617",
publisher = "Elsevier",

}

Effect of interfibrillar PVA bridging on water stability and mechanical properties of TEMPO/NaClO2 oxidized cellulosic nanofibril films. / Hakalahti, Minna; Salminen, Arto; Seppälä, Jukka; Tammelin, Tekla; Hänninen, Tuomas.

In: Carbohydrate Polymers, Vol. 126, 2015, p. 78-82.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of interfibrillar PVA bridging on water stability and mechanical properties of TEMPO/NaClO2 oxidized cellulosic nanofibril films

AU - Hakalahti, Minna

AU - Salminen, Arto

AU - Seppälä, Jukka

AU - Tammelin, Tekla

AU - Hänninen, Tuomas

N1 - SDA: SHP: Bioeconomy

PY - 2015

Y1 - 2015

N2 - TEMPO/NaClO2 oxidized cellulosic nanofibrils (TCNF) were covalently bonded with poly(vinyl alcohol) (PVA) to render water stable films. Pure TCNF films and TCNF-PVA films in dry state showed similar humidity dependent behavior in the elastic region. However, in wet films PVA had a significant effect on stability and mechanical characteristics of the films. When soaked in water, pure TCNF films exhibited strong swelling behavior and poor wet strength, whereas covalently bridged TCNF-PVA composite films remained intact and could easily be handled even after 24 h of soaking. Wet tensile strength of the films was considerably enhanced with only 10 wt% PVA addition. At 25% PVA concentration wet tensile strengths were decreased and films were more yielding. This behavior is attributed to the ability of PVA to reinforce and plasticize TCNF-based films. The developed approach is a simple and straightforward method to produce TCNF films that are stable in wet conditions.

AB - TEMPO/NaClO2 oxidized cellulosic nanofibrils (TCNF) were covalently bonded with poly(vinyl alcohol) (PVA) to render water stable films. Pure TCNF films and TCNF-PVA films in dry state showed similar humidity dependent behavior in the elastic region. However, in wet films PVA had a significant effect on stability and mechanical characteristics of the films. When soaked in water, pure TCNF films exhibited strong swelling behavior and poor wet strength, whereas covalently bridged TCNF-PVA composite films remained intact and could easily be handled even after 24 h of soaking. Wet tensile strength of the films was considerably enhanced with only 10 wt% PVA addition. At 25% PVA concentration wet tensile strengths were decreased and films were more yielding. This behavior is attributed to the ability of PVA to reinforce and plasticize TCNF-based films. The developed approach is a simple and straightforward method to produce TCNF films that are stable in wet conditions.

KW - TEMPO oxidized cellulose nanofibrils

KW - film

KW - poly(vinyl alcohol)

KW - water stable

KW - mechnaical properties

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SP - 78

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JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

SN - 0144-8617

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