Influence of the delignification process on the properties of panels made with Guadua fibers and plant resin

Sánchez, Martha L.; Aperador, W.; Capote, Gil

doi:10.1016/j.indcrop.2018.08.084

Cited by 12 publications

(5 citation statements)

References 25 publications

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“…The hydrophilic tendency of the camphor tree was reflected in the absorbance band of 3000 to 3600 cm -1 , which is related to the -OH groups present in the aliphatic or aromatic alcohol and present in their main components (Bledzki et al 2010). The presence of -OH bonds at approximately 3300 cm -1 was detected, while aliphatic C-H and methylene asymmetric C-H groups were observed at approximately 2900 and 2800 cm -1 , respectively (Sánchez et al 2018). Between 1734 and 1595 cm -1 , two peaks appear, which could be caused by the benzene ring conjugating with the hydroxyl (-OH) or amino group (-NH2), resulting in an absorbance peak due to ring structures (Figen et al 2013).…”

Section: Analysis Of the Functional Groupsmentioning

confidence: 98%

Performance of binderless board manufactured using camphor tree residue

Cai

Wang

Song

et al. 2022

BioRes

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Residue of the branch wood of camphor tree (Cinnamomum camphora) was used to manufacture binder-free biodegradable biomass fiberboard (bio-board) by the wet method. To investigate the mechanical properties of the bio-board, bending rupture stress and tensile rupture stress tests were measured and the effect of heating temperature and applied pressure on the performance of the bio-board was evaluated. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to analyze the influencing factors on the microstructure and bond quality of the bio-boards. The overall density of the bio-boards exceeded 0.8 g/cm3 and the moisture content was below 10%, which conformed to the JIS A 5908 standard (2014) for the hardboard S20 type design specification. The bending rupture stress and tensile rupture stress continued to increase, and the dimensional stability continuously improved as the applied pressure and the heating temperature increased. However, when the heating temperature exceeded 170 °C, the increase in the rupture stress slowed down and the dimensional stability had been improved. Furthermore, increasing the heating temperature was more conducive for optimizing the bio-board’s performance than increasing the applied pressure.

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Section: Analysis Of the Functional Groupsmentioning

confidence: 98%

Performance of binderless board manufactured using camphor tree residue

Cai

Wang

Song

et al. 2022

BioRes

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“…In Figure 5a-b, hydrothermal pretreatment had little effect on cellulose, the weakening of these 3400 cm -1 and 2902 cm -1 peaks was mainly due to the contribution of hemicellulose and lignin. Compared with other characteristic peaks, the C = O absorption peak at 1738 cm -1 disappeared fastest with the increase of alkaline sul te pretreatment time, indicating that the C = O structure was the rst and most easily decomposed in deligni cation, and also indicating that small molecular compounds such as hemicellulose and fat in wood our were dissolved in alkaline solution (Sánchez et al 2018). The characteristic peak at 897 cm -1 was used to determine whether the β-D glucose group in cellulose molecules was destroyed (Hongli et al 2013).…”

Section: Ftirmentioning

confidence: 99%

“…The mass-loss rate of poplar was higher than that of Cunninghamia lanceolata during the same pretreatment time. This was because broadleaf poplar had holes conducive to the entry of water molecules, which made the chemical components of poplar more easily degraded (Sánchez et al 2018;). The color of the solution after two kinds of pretreatment gradually deepened with the increase of time (Figure 3c-f) also con rmed the positive correlation between mass-loss rate and pretreatment time, and the color of Chinese r solution after pretreatment was deeper than that of poplar, indicating that the colored substances in Chinese r were more than poplar.…”

Section: Mass Loss Ratementioning

confidence: 99%

Mechanical properties of compression wood from two fast-growth wood species pretreated with alkaline sulfites

Ma,

Song,

et al. 2023

Preprint

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Compressed fast-growing wood has excellent mechanical properties, making it a cheap alternative to solid wood. However, compression without pretreatment can lead to rupture of the cell walls of the wood and even to macroscopically visible cracks. Thus, to minimize damage to fast-growing wood during compression and to increase the compression ratio and density of the wood simultaneously, pretreatment is usually carried out prior to compression. This study investigated the effects of hydrothermal pretreatment and alkaline sulfite pretreatment on the mechanical properties of compression-modified Chinese fir and poplar wood. Comparison of the mass changes and mechanical strength of compressed wood obtained from two wood species after different pretreatments, in addition, their micro-morphology, chemical composition, and cellulose crystallinity were analyzed and evaluated. The results indicate that the density, compressive strength and hardness of compression specimens of fir and poplar reached the highest values after 5h and 3h of alkaline sulfite pretreatment, respectively.

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“…7,14,15 In order to improve the adhesive force of PLA/BF composites interface, many strategies have been carried out for modifying BFs using chemical, plasma, or physical treatments. [16][17][18] Chemical treatments involve using various chemicals to modify the chemical composition of the BF surface layer of BFs. 17,19,20 Das et al used sodium bicarbonate to treat natural fibers in an environmentally friendly method, which not only has a positive impact on the mechanical performance of developed polymericcomposites, but also has great commercial potential.…”

Section: Introductionmentioning

confidence: 99%

“…In order to improve the adhesive force of PLA/BF composites interface, many strategies have been carried out for modifying BFs using chemical, plasma, or physical treatments 16–18 . Chemical treatments involve using various chemicals to modify the chemical composition of the BF surface layer of BFs 17,19,20 .…”

Section: Introductionmentioning

confidence: 99%

Cardanol derivatives as compatibilizers for strengthening and toughening polylactic acid/bamboo fiber bio‐composites

et al. 2023

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The application of bamboo fibers (BFs) as a reinforcing filler in polylactic acid (PLA) is hindered by their poor compatibility owing to the intrinsic hydrophilia of BFs and the hydrophobicity of PLA. To solve this issue, cardanol (CD) and epoxidized cardanol glycidyl ether (ECGE) were used as compatibilizers to strengthen and toughen PLA/BF bio‐composites, to the best of our knowledge, preparing PLA/BF/CD and PLA/BF/ECGE bio‐composites. The impact strengths of the synthesized bio‐composites increased from 7.75 to 23.75 and 7.75 to 23.95 kJ/m2, respectively, compared with that of a PLA/BF composite without compatibilizer. The investigation of the mechanical properties, crystallization, fractured surface morphology, and solvent stress‐cracking resistance properties revealed that the toughening mechanism of the PLA/BF/CD bio‐composites are mainly based on the plasticization of CD, which results in high impact toughness but low tensile strength. Moreover, the modification with ECGE improves the impact and tensile strengths of the bio‐composite owing to the following factors: (1) the epoxy groups of ECGE generate strong interactions with the BF surface and PLA to form an enhanced interfacial structure; (2) when present at high concentrations, chain extension reaction between ECGE and PLA to increase the molecular chain entanglement of PLA; and (3) upon curing and crosslinking, ECGE forms an entangled network structure that toughens the matrix.

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Influence of the delignification process on the properties of panels made with Guadua fibers and plant resin

Cited by 12 publications

References 25 publications

Performance of binderless board manufactured using camphor tree residue

Performance of binderless board manufactured using camphor tree residue

Mechanical properties of compression wood from two fast-growth wood species pretreated with alkaline sulfites

Cardanol derivatives as compatibilizers for strengthening and toughening polylactic acid/bamboo fiber bio‐composites

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