Time-triggered calcium ion bridging in preparation of films of oxidized microfibrillated cellulose and pulp

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Time-triggered calcium ion bridging in preparation of films of oxidized microfibrillated cellulose and pulp. / Khanjani, Pegah; Ristolainen, Matti; Kosonen, Harri; Virtanen, Pasi; Ceccherini, Sara; Maloney, Thaddeus; Vuorinen, Tapani.

julkaisussa: Carbohydrate Polymers, Vuosikerta 218, 15.08.2019, s. 63-67.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Khanjani, Pegah ; Ristolainen, Matti ; Kosonen, Harri ; Virtanen, Pasi ; Ceccherini, Sara ; Maloney, Thaddeus ; Vuorinen, Tapani. / Time-triggered calcium ion bridging in preparation of films of oxidized microfibrillated cellulose and pulp. Julkaisussa: Carbohydrate Polymers. 2019 ; Vuosikerta 218. Sivut 63-67.

Bibtex - Lataa

@article{ee83651c12d1409dae71497a5ae8e42d,
title = "Time-triggered calcium ion bridging in preparation of films of oxidized microfibrillated cellulose and pulp",
abstract = "One of the main trends in developing bio-based materials is to improve their mechanical and physical properties using MFC derived from sustainable natural sources and compatible low-cost chemicals. The strength of anionic MFC based materials can be increased with addition of multivalent cations. However, direct mixing of solutions of multivalent cations with oxidized MFC may result in immediate, uncontrollable fibril aggregation and flock formation. The aim of this study was to design a method where Ca 2+ ions liberate from solid CaCO 3 particles on bleached hardwood (birch) kraft pulp, which was mixed with oxidized MFC and crosslink it to tailor the mechanical properties of the dried structure. In few minutes after adding acetic anhydride, pH of the wet film dropped from 7.3–4.8 through liberation of acetic acid and CaCO 3 particles solubilized releasing Ca 2+ . The novel method could be applied on industrial scale for improving the performance of packaging materials.",
keywords = "Acetic anhydride, Bleached hardwood kraft pulp, Cellulose film, Oxidized microfibrillated cellulose, Precipitated calcium carbonate, Tensile testing",
author = "Pegah Khanjani and Matti Ristolainen and Harri Kosonen and Pasi Virtanen and Sara Ceccherini and Thaddeus Maloney and Tapani Vuorinen",
year = "2019",
month = "8",
day = "15",
doi = "10.1016/j.carbpol.2019.04.060",
language = "English",
volume = "218",
pages = "63--67",
journal = "Carbohydrate Polymers",
issn = "0144-8617",

}

RIS - Lataa

TY - JOUR

T1 - Time-triggered calcium ion bridging in preparation of films of oxidized microfibrillated cellulose and pulp

AU - Khanjani, Pegah

AU - Ristolainen, Matti

AU - Kosonen, Harri

AU - Virtanen, Pasi

AU - Ceccherini, Sara

AU - Maloney, Thaddeus

AU - Vuorinen, Tapani

PY - 2019/8/15

Y1 - 2019/8/15

N2 - One of the main trends in developing bio-based materials is to improve their mechanical and physical properties using MFC derived from sustainable natural sources and compatible low-cost chemicals. The strength of anionic MFC based materials can be increased with addition of multivalent cations. However, direct mixing of solutions of multivalent cations with oxidized MFC may result in immediate, uncontrollable fibril aggregation and flock formation. The aim of this study was to design a method where Ca 2+ ions liberate from solid CaCO 3 particles on bleached hardwood (birch) kraft pulp, which was mixed with oxidized MFC and crosslink it to tailor the mechanical properties of the dried structure. In few minutes after adding acetic anhydride, pH of the wet film dropped from 7.3–4.8 through liberation of acetic acid and CaCO 3 particles solubilized releasing Ca 2+ . The novel method could be applied on industrial scale for improving the performance of packaging materials.

AB - One of the main trends in developing bio-based materials is to improve their mechanical and physical properties using MFC derived from sustainable natural sources and compatible low-cost chemicals. The strength of anionic MFC based materials can be increased with addition of multivalent cations. However, direct mixing of solutions of multivalent cations with oxidized MFC may result in immediate, uncontrollable fibril aggregation and flock formation. The aim of this study was to design a method where Ca 2+ ions liberate from solid CaCO 3 particles on bleached hardwood (birch) kraft pulp, which was mixed with oxidized MFC and crosslink it to tailor the mechanical properties of the dried structure. In few minutes after adding acetic anhydride, pH of the wet film dropped from 7.3–4.8 through liberation of acetic acid and CaCO 3 particles solubilized releasing Ca 2+ . The novel method could be applied on industrial scale for improving the performance of packaging materials.

KW - Acetic anhydride

KW - Bleached hardwood kraft pulp

KW - Cellulose film

KW - Oxidized microfibrillated cellulose

KW - Precipitated calcium carbonate

KW - Tensile testing

UR - http://www.scopus.com/inward/record.url?scp=85064872393&partnerID=8YFLogxK

U2 - 10.1016/j.carbpol.2019.04.060

DO - 10.1016/j.carbpol.2019.04.060

M3 - Article

VL - 218

SP - 63

EP - 67

JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

SN - 0144-8617

ER -

ID: 33777499