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Green bio-based aerogels prepared from recycled cellulose fiber suspensions

RSC advances, 2015-01, Vol.5 (4), p.31384-31391 [Peer Reviewed Journal]

info:eu-repo/semantics/openAccess ;ISSN: 2046-2069 ;EISSN: 2046-2069 ;DOI: 10.1039/c5ra02981c

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Title:
Green bio-based aerogels prepared from recycled cellulose fiber suspensions
Author: Wang, Liang ; Sánchez-Soto, Miguel
Subjects: Aerogels ; Calorimetry ; Cellulose fibers ; Combustion ; Composite materials Testing ; Composites ; Conductivity ; Enginyeria dels materials ; Fibres de cel·lulosa ; Fire behavior ; Flame-retardant properties ; Fourier transforms ; Infrared spectroscopy ; Manofibrils ; Materials compostos ; Mechanical performance ; Nanocellulose aerogels ; Poly(vinyil alcohol) ; Proves ; Recycled ; Sodium ; Sodium montmorillonite clay ; Wheat gluten foams ; Àrees temàtiques de la UPC
Is Part Of: RSC advances, 2015-01, Vol.5 (4), p.31384-31391
Description: Recycled cellulose fibers (RCF) from waste paper were utilized to prepare bio-based aerogels through an environmentally friendly freeze-drying method. Food thickening agent sodium carboxymethyl cellulose (CMC) served as a matrix in the bio-aerogels. The microstructures and mechanical properties of the aerogels have been studied as a function of RCF/CMC content. Sodium montmorillonite (Na + -MMT) and ammonium polyphosphate (APP) were added to enhance the thermal stability and flame retardancy, which were investigated by thermogravimetric analysis (TGA) and cone calorimetry respectively. It was found that the Na + -MMT significantly improved the fire retardancy of the aerogels and APP played a synergistic effect with it. The initial decomposition temperature increased by 15 °C and the peak of heat release rate decreased from 90 to 49.5 kW m −2 in the presence of 33% clay. Addition of APP further increased the residue amount and reduced the fire growth rate. Fourier transform infrared spectroscopy (FTIR) was used to analyse the char formed after cone calorimeter tests. The flammability of green aerogels prepared using recycled cellulose fibres was improved by adding clay and ammonium polyphosphate.
Language: English
Identifier: ISSN: 2046-2069
EISSN: 2046-2069
DOI: 10.1039/c5ra02981c
Source: Recercat

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Green bio-based aerogels prepared from recycled cellulose fiber suspensions

info:eu-repo/semantics/openAccess ;ISSN: 2046-2069 ;EISSN: 2046-2069 ;DOI: 10.1039/c5ra02981c

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