Effects of Fiber Surface Treatments on the Properties of Wood Fiber–Phenolic Foam Composites

Ma, Yufeng; Wang, Chunpeng; Chu, Fuxiang

doi:10.15376/biores.12.3.4722-4736

Cited by 16 publications

(7 citation statements)

References 30 publications

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“…The thermal conductivity of all the composite panels (around 400 x 400 x 8 mm 3 ) were investigated before the samples were cut for other tests. It is well-known that the lower values of thermal conductivity demonstrate higher insulation properties [50]. Thermal conductivity of phenolic resin is 0.29 to 0.32 Wm -1 k -1 in the case of 32 to 64 kg/m 3 density, and it is 0.35 to 0.40 Wm -1 k -1 in the case of 112 to 160 kg/m 3 density [51].…”

Section: Thermal Conductivity Of the Developed Biocomposite Panelsmentioning

confidence: 99%

Novel insulation panels development from multilayered coir short and long fiber reinforced phenol formaldehyde polymeric biocomposites

et al. 2021

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This study investigated about the developments of insulation panels from multilayered coir long and short fiber reinforced phenol formaldehyde polymeric (PF) resin. The lengths of coir long fibers (CLF) were within 3 mm, whereas the short fibers (CSF) ranged from 0.1 mm to 1.25 mm. Four composite panels of 360, 680, 800, and 1000 kg/m3 densities were developed by employing hot pressing technology. The thermal conductivity, microstructural, mechanical, and physical properties of the composite panels were investigated. Perceived thermal conductivity values ranged within 0.046280 (0.000494) to 0.062400 (0.001146) Wm‒1 k‒1of the composites demonstrating superior insulation properties. Moreover, the current study also found that mechanical and thermal properties showed improvement with the increase of density. Low-density fiberboards had the lowest performances compared to high-density composite panels, with the exception of the 1000 kg/m3 density, in which fiber agglomeration occurred. Furthermore, all the developed composite panels display superior potentiality for use as effective insulation materials. The FTIR (Fourier transform infrared spectroscopy) analysis also shows an efficient bonding between the cellulosic coir materials and PF resin. The overall characteristics of the composite panels, especially medium fiberboard, show prominent potential for industrial production units by fulfilling the consumer requirements.

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Section: Thermal Conductivity Of the Developed Biocomposite Panelsmentioning

confidence: 99%

Novel insulation panels development from multilayered coir short and long fiber reinforced phenol formaldehyde polymeric biocomposites

et al. 2021

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“…As a thermal insulation material, phenolic foam (PF) has some excellent properties, such as excellent flame retardant, low smoke and low toxicity, and is widely used in many different fields including aviation, construction, industrial pipelines, transportation and so on [1][2][3]. Nevertheless, PF's large-scale promotion and application is greatly restricted because of its fragility [3][4][5]. The toughening modification for PF is imperative to decline its fragility.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of DOPO-g-CNSL and Its Effect on the Properties of Phenolic Foams

Ma¹,

Gong²,

Xie³

et al. 2019

Journal of Renewable Materials

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In order to improve the mechanical properties without reducing its flame retardancy of phenolic foams (PFs), 9, 10-dihydro-9-oxa-10phosphaphenanthrene-10-oxide (DOPO) was introduced in the structure of cashew nut shell liquid (CNSL) to improve its flame retardant, and the product of DOPO grafting CNSL (DOPO-g-CNSL) was obtained to modify phenolic resin, and to prepare DOPO-g-CNSL modified PFs (DCMPFs). The structures of DOPO-g-CNSL were verified by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1 H-NMR). Compared with CNSL, thermal stability of DOPO-g-CNSL was decreased and Ti decreased by 3.53%, but the residual carbon (800°C) was increased by 35.05%. Compared with pure PF, the mechanical properties, toughness and flame retardancy of DCMPFs were increased when the ratio of DOPO-g-CNSL to phenol (DOPO-g-CNSL/P) was no more than 10%. With the dosage of DOPO-g-CNSL/P increased, Ti of DCMPFs was slightly increased, but the carbon residues (800°C) were almost unchanged. And the cell sizes of DCMPFs were basically the same as the pure PF. By comprehensive analysis, the suitable dosage of DOPO-g-CNSL/P was no more than 10%.

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“…Phenolic foam (PF), one of the best thermal insulation materials, offers excellent flame retardant properties, as well as low smoke and low toxicity, and is widely used in aviation, construction, industrial pipelines, and transportation [1,2,3]. Nevertheless, large-scale promotion and application are greatly restricted because of its fragility [3,4,5]. In order to reduce the fragility of PF, the toughening modification of PF is imperative.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of DOPO-ITA Modified Ethyl Cellulose and Its Application in Phenolic Foams

Gong

Liao

et al. 2018

Polymers

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In order to improve the performance of phenolic foam, an additive compound of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and Itaconic acid (ITA) were attached on the backbone of ethyl cellulose (EC) and obtained DOPO-ITA modified EC (DIMEC), which was used to modify phenolic resin and composite phenolic foams (CPFs). The structures of DOPO-ITA were verified by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1H NMR). The molecular structure and microstructure were characterized by FT-IR spectra and SEM, respectively. Compared with EC, the crystallinity of DIMEC was dramatically decreased, and the diffraction peak positions were basically unchanged. Additionally, thermal stability was decreased and Ti decreased by 24 °C. The residual carbon (600 °C) was increased by 25.7%. With the dosage of DIMEC/P increased, the Ea values of DIMEC composite phenolic resins were increased gradually. The reaction orders were all non-integers. Compared with PF, the mechanical properties, flame retardancy, and the residual carbon (800 °C) of CPFs were increased. The cell size of CPFs was less and the cell distribution was relatively regular. By comprehensive analysis, the suitable dosage of DIMEC/P was no more than 15%.

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Effects of Fiber Surface Treatments on the Properties of Wood Fiber–Phenolic Foam Composites

Cited by 16 publications

References 30 publications

Novel insulation panels development from multilayered coir short and long fiber reinforced phenol formaldehyde polymeric biocomposites

Novel insulation panels development from multilayered coir short and long fiber reinforced phenol formaldehyde polymeric biocomposites

Synthesis and Characterization of DOPO-g-CNSL and Its Effect on the Properties of Phenolic Foams

Preparation and Characterization of DOPO-ITA Modified Ethyl Cellulose and Its Application in Phenolic Foams

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