Biobased Nanocomposites Prepared by In Situ Polymerization of Furfuryl Alcohol with Cellulose Whiskers or Montmorillonite Clay

Pranger, Lawrence A.; Tannenbaum, Rina

doi:10.1021/ma8020213

Cited by 168 publications

(95 citation statements)

References 25 publications

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“…These nanolayers with high aspect ratio can serve as a mass transport insulator, which causes a more tortuous pathway for decomposed products to diffuse out and heat to flow into the underlying materials. 38,39 Similar reduction in decomposition rates was also observed from the T 50 (temperature at 50% weight loss) and char residue (char formed at 500°C), which increase with increasing nanoclay loadings, as observed in Figure 9, panels c and d.…”

Section: Ftir Analysissupporting

confidence: 75%

Biobased Epoxy Nanocomposites Derived from Lignin-Based Monomers

2015

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Biobased epoxy nanocomposites were synthesized based on 2-methoxy-4-propylphenol (dihydroeugenol, DHE), a molecule that has been obtained from the lignin component of biomass. To increase the content of hydroxyl groups, DHE was o-demethylated using aqueous HBr to yield propylcatechol (DHEO), which was subsequently glycidylated to epoxy monomer. Optimal conditions in terms of yield and epoxy equivalent weight were found to be 60 °C with equal NaOH/phenolic hydroxyl molar ratio. The structural evolution from DHE to cured epoxy was followed by (1)H NMR and Fourier transform infrared spectroscopy. The nano-montmorillonite modified DHEO epoxy exhibited improved storage modulus and thermal stability as determined from dynamic mechanical analysis and thermogravimetric analysis. This study widens the synthesis routes of biobased epoxy thermosets from lignin-based molecules.

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Section: Ftir Analysissupporting

confidence: 75%

Biobased Epoxy Nanocomposites Derived from Lignin-Based Monomers

2015

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“…MMT is composed from aluminium silicate layers which were organized in a parallel fashion to form stacks with a regular van der Waal gap in between them called interlayer spacing or gallery [15,16]. MMT has high negatively charged surface that is compensated by cations Ca 2+ or Na + [17].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic absorption efficiency of polypropylene/montmorillonite/polypyrrole nanocomposites

et al. 2011

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A B S T R A C TElectrical conductivity and dielectric properties have been studied for two types of polypropylene composites containing conducting phase. One type comprised conducting polymer-polypyrrole while the second employed montmorillonite particles coated with conducting polymer-polypyrrole. Composites' shielding properties were estimated based on their previously determined electromagnetic characteristics. Unlike a basic binary polypropylene/polypyrrole composite, the ternary sample with multicomponent montmorillonite particles exhibits higher dielectric losses and consequently a significant rise in shielding efficiency in the radio-frequency range of 0.1-1.5 GHz. This stems from the presence of highly polarizable multicomponent montmorillonite anisotropic lamellar particles with polypyrrole conducting layer, which considerably increases the complex permittivity of the composite.

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“…The absorption peaks at 1592 cm -1 and 1508 cm -1 were ascribed to the aromatic skeletal vibration of lignin (Pandey 1999). Three new absorptions peaks at 1718, 1563, and 796 cm -1 in the treated woods were attributed to the C=O stretching vibration of diketonic structures, which resulted from the hydrolytic opening reaction of furan rings in the PFA, conjugated C=C descriptions, and skeletal vibrations of 2,5-disubstituted furan rings, respectively (Chuang et al 1984;Pranger and Tannenbaum 2008;Dong et al 2015). The weak peak located at 733 cm -1 in the treated wood samples was related to the furan rings of PFA (Oishi et al 2013).…”

Section: Ftir Analysismentioning

confidence: 99%

Improving Dimensional and Thermal Stability of Poplar Wood via Aluminum-based Sol-Gel and Furfurylation Combination Treatment

et al. 2017

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Wood modification is an efficient method to improve wood performance and expand the applications of wood material. In this study, a combination modification method of aluminum sol-gel and furfurylation was developed to improve the performance of poplar wood. Wood samples were characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The properties of the treated wood, including thermal stability, water uptake, dimensional stability, and dynamic wettability were also evaluated. The thermogravimetric analysis results indicated that the incorporation of an aluminum-based gel could prevent furfurylated wood from thermal degradation by converting the gel into nano-Al2O3. The aluminum-based sol-gel apparently hindered furfuryl alcohol polymerization and reduced the weight percent gain of the samples; the anti-swelling efficiency of the treated wood was over 57% (with little decrease) due to crosslinking between the wood and aluminum-based gel. The water uptake and hydrophobicity of the modified samples were improved significantly in comparison to the control samples.

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Biobased Nanocomposites Prepared by In Situ Polymerization of Furfuryl Alcohol with Cellulose Whiskers or Montmorillonite Clay

Abstract: Bio-based Nanocomposites Prepared by In-situ Polymerization of Furfuryl Alcohol with Cellulose Whiskers and Montmorillonite Clay Effect of MMT catalyst on resinification of FA 50 100 150 200 250

Cited by 168 publications

References 25 publications

Biobased Epoxy Nanocomposites Derived from Lignin-Based Monomers

Biobased Epoxy Nanocomposites Derived from Lignin-Based Monomers

Electromagnetic absorption efficiency of polypropylene/montmorillonite/polypyrrole nanocomposites

Improving Dimensional and Thermal Stability of Poplar Wood via Aluminum-based Sol-Gel and Furfurylation Combination Treatment

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