Eco-friendly Flame-Retardant Cellulose Nanofibril Aerogels by Incorporating Sodium Bicarbonate

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Eco-friendly Flame-Retardant Cellulose Nanofibril Aerogels by Incorporating Sodium Bicarbonate. / Farooq, Muhammad; Sipponen, Mika H.; Seppälä, Ari; Österberg, Monika.

julkaisussa: ACS Applied Materials and Interfaces, Vuosikerta 10, Nro 32, 15.08.2018, s. 27407-27415.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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@article{5710933f0bfa4f528cbc8d9418117bbf,
title = "Eco-friendly Flame-Retardant Cellulose Nanofibril Aerogels by Incorporating Sodium Bicarbonate",
abstract = "Cellulose nanofiber (CNF) aerogels offer excellent thermal insulation properties, but high flammability restricts their application. In this study, CNF aerogels were prepared by incorporating sodium bicarbonate (SBC), which effectively improved the fire retardancy without compromising the thermal conductivity of the aerogels, which was only 28 mW m-1 K-1. The minimum burning velocity of flame-retardant aerogels was 0.20 cm s-1 at 40 wt {\%} of SBC, which is significantly lower compared to 5.84 cm s-1 of pure CNF aerogels. At the threshold concentration of 20 wt {\%} SBC, the flame-retardant aerogel demonstrated flameless pyrolysis along with enhanced char formation. SBC additionally provides control over the microporosity and morphology, due to the concentration-dependent formation of lamellar layers during the preparation of aerogels. Overall, this work describes an efficient method for preparing flame-retardant CNF aerogels that could lay the foundation for next-generation bio-based insulation materials.",
keywords = "freeze-drying, polymer, renewable, sustainable, thermal insulation",
author = "Muhammad Farooq and Sipponen, {Mika H.} and Ari Sepp{\"a}l{\"a} and Monika {\"O}sterberg",
year = "2018",
month = "8",
day = "15",
doi = "10.1021/acsami.8b04376",
language = "English",
volume = "10",
pages = "27407--27415",
journal = "ACS Applied Materials and Interfaces",
issn = "1944-8244",
publisher = "AMERICAN CHEMICAL SOCIETY",
number = "32",

}

RIS - Lataa

TY - JOUR

T1 - Eco-friendly Flame-Retardant Cellulose Nanofibril Aerogels by Incorporating Sodium Bicarbonate

AU - Farooq, Muhammad

AU - Sipponen, Mika H.

AU - Seppälä, Ari

AU - Österberg, Monika

PY - 2018/8/15

Y1 - 2018/8/15

N2 - Cellulose nanofiber (CNF) aerogels offer excellent thermal insulation properties, but high flammability restricts their application. In this study, CNF aerogels were prepared by incorporating sodium bicarbonate (SBC), which effectively improved the fire retardancy without compromising the thermal conductivity of the aerogels, which was only 28 mW m-1 K-1. The minimum burning velocity of flame-retardant aerogels was 0.20 cm s-1 at 40 wt % of SBC, which is significantly lower compared to 5.84 cm s-1 of pure CNF aerogels. At the threshold concentration of 20 wt % SBC, the flame-retardant aerogel demonstrated flameless pyrolysis along with enhanced char formation. SBC additionally provides control over the microporosity and morphology, due to the concentration-dependent formation of lamellar layers during the preparation of aerogels. Overall, this work describes an efficient method for preparing flame-retardant CNF aerogels that could lay the foundation for next-generation bio-based insulation materials.

AB - Cellulose nanofiber (CNF) aerogels offer excellent thermal insulation properties, but high flammability restricts their application. In this study, CNF aerogels were prepared by incorporating sodium bicarbonate (SBC), which effectively improved the fire retardancy without compromising the thermal conductivity of the aerogels, which was only 28 mW m-1 K-1. The minimum burning velocity of flame-retardant aerogels was 0.20 cm s-1 at 40 wt % of SBC, which is significantly lower compared to 5.84 cm s-1 of pure CNF aerogels. At the threshold concentration of 20 wt % SBC, the flame-retardant aerogel demonstrated flameless pyrolysis along with enhanced char formation. SBC additionally provides control over the microporosity and morphology, due to the concentration-dependent formation of lamellar layers during the preparation of aerogels. Overall, this work describes an efficient method for preparing flame-retardant CNF aerogels that could lay the foundation for next-generation bio-based insulation materials.

KW - freeze-drying

KW - polymer

KW - renewable

KW - sustainable

KW - thermal insulation

UR - http://www.scopus.com/inward/record.url?scp=85050742246&partnerID=8YFLogxK

U2 - 10.1021/acsami.8b04376

DO - 10.1021/acsami.8b04376

M3 - Article

AN - SCOPUS:85050742246

VL - 10

SP - 27407

EP - 27415

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

SN - 1944-8244

IS - 32

ER -

ID: 29223567