Studies of Polyvinyl Alcohol/Alkali Lignin/Silica Composite Foam Material (PLCFM)

Luo, Huachao; Lü, Jing; Ren, Shixue; Gui-zhen, Fang; Jiang, Guiquan

doi:10.15376/biores.10.3.5961-5973

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…This result was possibly because of the high Si content in the untreated vs. treated composites (Rashid et al 2016a). The surface treatments partially removed the outer surface, which was rich in Si content and complex chemical structures, and contributed to the thermal stability of the composites (Luo et al 2015;Shi et al 2016).…”

Section: Thermal Analysismentioning

confidence: 99%

Influence of treatments on the mechanical and thermal properties of sugar palm fibre reinforced phenolic composites

Rashid

Leman

Jawaid

et al. 2017

BioRes

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Sugar palm fibre (SPF) was used to prepare composites with phenolic resin. The SPF underwent treatment with either sea water for 30 d or a 0.5% alkaline solution for 4 h. The composites contained 30% (vol.) SPF in a powdered form, and the composite samples were fabricated by a hot press machine. The effects of the fibre treatments on the mechanical (flexural, impact, and compressive), thermal, and morphological properties of the composites were analyzed. The SPF treatments considerably improved the mechanical properties of the composites compared with the untreated composite. The alkaline treatment resulted in the most improved flexural and impact strength of the composites. In contrast, the sea water treatment had the best results for improving the compressive strength. Morphological analyses indicated that the surface treatments improved the fibre-matrix bonding. The thermal degradation analysis showed that both the sea water and alkaline treatments of the SPF slightly affected the thermal stability of the composites. Consequently, SPF can be effectively used as an alternative natural fibre for reinforcing bio-composites.

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Section: Thermal Analysismentioning

confidence: 99%

Influence of treatments on the mechanical and thermal properties of sugar palm fibre reinforced phenolic composites

Rashid

Leman

Jawaid

et al. 2017

BioRes

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“…9 This could imply short lifetimes, in particular when the mechanical sollicitations are combined with thermal degradations. 10 This last point motivates the study of materials with high mechanical properties in terms of failure, as an alternative to open cell polyurethane (PU) foams, natural or mineral fibrous materials, which are currently the most used materials for vibroacoustic control.…”

Section: Introductionmentioning

confidence: 99%

Acoustic performances of silicone foams for sound absorption

Abbad

Jaboviste

Ouisse

et al. 2017

Journal of Cellular Plastics

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The aim of this study is the investigation of the link between the elaboration process, the microstructure and the acoustic behaviour of silicone foams obtained using a two-component silicone. Different parameters are varied such as the ratio of components, the addition of a thinning agent and the curing temperature, with the objective of understanding the influence of each parameter in the foam's acoustic absorption. The microstructure is analysed using SEM and acoustic properties are measured. Two non-acoustical properties of the porous material are also investigated, namely the porosity and the flow resistivity. Pore cell size and interconnected porosity have great impact on acoustical properties. Significant enhancements of the absorption properties could be obtained in the low frequency band by increasing the rate of agent B through an increase in the amount of interconnected porous cells. An improvement in absorption is observed in the higher frequency range when a thinning agent is added to the mixture. Representative models of the foam for acoustic simulations are obtained allowing estimation of the tortuosity, viscous and thermal characteristic length from acoustic measurements. These models are able to simulate the acoustic behaviour of the silicone foams when embedded in sound packages.

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Physicochemical and thermal properties of lignocellulosic fiber from sugar palm fibers: effect of treatment

et al. 2016

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Sugar palm fiber (SPF) is one of the prospective fibers used to reinforce polymer composites. The aim of this study is to evaluate the physicochemical, thermal, and morphological properties of SPF after alkali and sea water treatments. The chemical constituents group and thermal stability of the SPF were determined using scanning electronic microscopy (SEM) along with energy dispersive X-ray spectroscopy and thermogravimetric analysis (TGA). Fourier transform infrared spectroscopy was carried out to detect the presence of functional groups in untreated and treated SPF. The SEM images after both treatments showed that the external surface of the fiber became clean as a result. However, the sea water treatment affected the fiber properties physically, while the alkali treatment affected it both physically and chemically by dissolving the hemicellulose in the fiber. The TGA results showed that untreated fiber is significantly more stable than treated fiber. In conclusion, the results show that the fiber surface treatment significantly affected the characterization of the fiber.

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Studies of Polyvinyl Alcohol/Alkali Lignin/Silica Composite Foam Material (PLCFM)

Cited by 6 publications

References 22 publications

Influence of treatments on the mechanical and thermal properties of sugar palm fibre reinforced phenolic composites

Influence of treatments on the mechanical and thermal properties of sugar palm fibre reinforced phenolic composites

Acoustic performances of silicone foams for sound absorption

Physicochemical and thermal properties of lignocellulosic fiber from sugar palm fibers: effect of treatment

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