Effect of Hydrophobic Modification on Mechanical Properties of Chinese Fir Wood

Yang, Rui; Zhang, Jie; Wang, Siqun; Mao, Haiyan; Shi, Yilin; Zhou, Dongshan

doi:10.15376/biores.13.1.2035-2048

Cited by 5 publications

(4 citation statements)

References 31 publications

(44 reference statements)

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“…Compared with Curve A for the raw material, in Curve B, the peak intensities at 1100 cm −1 and 3000–3700 cm −1 decrease, indicating the dehydration of EHL. Therefore, a comparison of Curves A and B shows that dehydration and aromatization occurred during the HTC of EHL, and many oxygen-containing functional groups such as C=O and C-O were present on the surface of the synthesized CSs 37 , 38 .…”

Section: Resultsmentioning

confidence: 99%

Fast preparation of carbon spheres from enzymatic hydrolysis lignin: Effects of hydrothermal carbonization conditions

Mao

Chen

Huang

et al. 2018

Sci Rep

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This study explores the effect of carbon sphere preparation conditions on the morphology of the carbon spheres and the micropore development by fast potassium hydroxide activation via microwave heating. Enzymatic hydrolysis lignin is used as the precursor for carbon sphere preparation via environmentally friendly hydrothermal carbonization. The effects of various carbonization temperatures, carbonization times and reaction concentrations on the physical morphology of the carbon sphere surfaces are investigated. The Brunauer-Emmett-Teller surface area, yield and scanning electron microscopic images are used to characterize the carbon spheres. High carbonization temperatures and times result in large particle sizes, high sphericity, uniform size, and high dispersity of the carbon spheres. The best carbon spheres are obtained at 270 °C for 7 hours with a reaction concentration of 0.06 g ml−1 and a particle size of 3–6 μm. After activation, the Brunauer-Emmett-Teller surface area of the activated carbon spheres increases from 248 m2 g−1 to 1278 m2 g−1. Carbon spheres activated by treatment with fast potassium hydroxide and microwave heating can develop micropores that enhance the adsorptive capacity for small molecules, such as gases. Enzymatic hydrolysis lignin-derived carbon spheres formed via hydrothermal carbonization should be potentially sustainable materials applicable in energy and environmental fields.

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Section: Resultsmentioning

confidence: 99%

Fast preparation of carbon spheres from enzymatic hydrolysis lignin: Effects of hydrothermal carbonization conditions

Mao

Chen

Huang

et al. 2018

Sci Rep

Self Cite

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show abstract

“…The microstructure and surface morphology of the samples were examined via field emission scanning electron microscopy (FE-SEM) (S4800, HITACHI, Tokyo, Japan). The samples were attached to an aluminum specimen mount with conductive carbon tape (Yang et al 2018a) and sputter coated with gold under vacuum at 20 mA for 20 min. The samples were observed and imaged at an accelerating voltage of 5 kV.…”

Section: Micromorphological Featuresmentioning

confidence: 99%

Facile synthesis of mesoporous silica aerogels from rice straw ash-based biosilica via freeze-drying

Yang

Wang

Zhang

et al. 2018

BioRes

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The combustion of biomass fuels has been a significant source of global energy, and about 10 million tons of straw are used annually, yielding at least 0.5 million tons of straw ash. However, the ash from rice straw has rarely been reused, thereby contributing to environmental pollution. A new approach is reported for preparing mesoporous silica aerogels using straw ash-based biosilica via a sol-gel process and vacuum freeze-drying. The mesoporous structure, porosity, pore volume, and specific surface area of this straw ash-based aerogel had satisfactory values. Effects of pH on the synthesis of silica aerogel were investigated to better understand the most important factors influencing the gelation, final structure, physicochemical properties, morphology, and thermostability of the samples.

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“…To explore the relationship between wood properties and chemical compositions, there has been a wealth of research conducted on removing the chemical components from wood cell walls through a chemical method. Moreover, the chemical composition of wood is found to have a significant influence on the mechanical properties [ 1 , 2 , 3 ]. It is also found that a decline in hemicellulose affects the integrity of the cell wall polymers and decreases the strength against mechanical loads.…”

Section: Introductionmentioning

confidence: 99%

Biological Degradation of Chinese Fir with Trametes Versicolor (L.) Lloyd

et al. 2017

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Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) has been an important afforestation species in northeast China. It has obvious defects of buckling and cracking easily, which are caused by its chemical components. Trametes versicolor (L.) Lloyd, a white-rot fungus, can decompose the cellulose, hemicellulose, and lignin in the wood. White-rot fungus was used to biologically degrade Chinese fir wood. The effects of different degradation time on the Chinese fir wood’s mechanical properties, micromorphology, chemical components, and crystallinity were studied. The results showed that the heartwood of Chinese fir was more durable than the sapwood and the durability class of Chinese fir was III. Trametes versicolor (L.) Lloyd had a greater influence on the mechanical properties (especially with respect to the modulus of elasticity (MOE)) for the sapwood. Trametes versicolor (L.) Lloyd degraded Chinese fir and colonized the lumen of various wood cell types in Chinese fir, penetrated cell walls via pits, caused erosion troughs and bore holes, and removed all cell layers. The ability of white-rot fungus to change the chemical composition mass fraction for Chinese fir was: hemicellulose > lignin > cellulose. The durability of the chemical compositions was: lignin > cellulose > hemicellulose. The crystallinity of the cellulose decreased and the mean size of the ordered (crystalline) domains increased after being treated by white-rot fungus.

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Effect of Hydrophobic Modification on Mechanical Properties of Chinese Fir Wood

Cited by 5 publications

References 31 publications

Fast preparation of carbon spheres from enzymatic hydrolysis lignin: Effects of hydrothermal carbonization conditions

Fast preparation of carbon spheres from enzymatic hydrolysis lignin: Effects of hydrothermal carbonization conditions

Facile synthesis of mesoporous silica aerogels from rice straw ash-based biosilica via freeze-drying

Biological Degradation of Chinese Fir with Trametes Versicolor (L.) Lloyd

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