Properties of binderless board made from rice straw: The morphological effect of particles

Kurokochi, Yoko; Sato, Masatoshi

doi:10.1016/j.indcrop.2015.01.044

Cited by 47 publications

(25 citation statements)

References 17 publications

(20 reference statements)

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“…The board size was 300 × 300 × 5 mm, and the target density was 0.8 g/cm 3 . The pressing procedure was as described in our previous study [6]. Two boards were manufactured for each board type.…”

Section: Steam Treatment Of Rice Strawmentioning

confidence: 99%

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Steam treatment to enhance rice straw binderless board focusing hemicellulose and cellulose decomposition products

Kurokochi

Sato

2020

J Wood Sci

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Rice straw is a troublesome biomass for an industrial application because of its high silica content and the wax-like substances covering the surface. At manufacturing binderless boards, which are considered environmentally friendly as they do not contain synthetic resins, rice straw silica contributed to water resistance, while the wax-like substances adversely affected self-bonding. This study investigated the effects of steam treatment on the self-bonding of binderless boards manufactured from rice straw. The chemical changes during steam treatment were examined by gas chromatography-mass spectrometry (GC-MS), and their influence on the bonding properties is discussed. Internal bonding strength and water resistance significantly increased by steam treatment. They also increased with increasing pressing temperature, and decreasing particle size. GC/MS analysis showed that not only hemicellulose and lignin, but also amorphous cellulose was decomposed during the steam treatment. Among the degradation products, 5-hydroxymethylfurfural was suggested to contribute to self-bonding during hot-pressing, while furfural was vaporized from the rice straw. Fine-grinding to below 150 μm after steam treatment resulted in high water resistance and an internal bonding strength of 0.6 MPa, which met the Japan Industrial Standards (JIS) requirement for Type-30 medium-density fiberboard (MDF). This mild pretreatment offers an alternative to steam explosion.

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Section: Steam Treatment Of Rice Strawmentioning

confidence: 99%

“…Binderless boards that contain no resin are highly desirable from an environmental perspective. Our previous studies showed that rice straw binderless boards could be successfully manufactured [6][7][8]. It was shown that silica contributed to water resistance, although slightly reduced bonding strength [7].…”

Section: Introductionmentioning

confidence: 99%

Steam treatment to enhance rice straw binderless board focusing hemicellulose and cellulose decomposition products

Kurokochi

Sato

2020

J Wood Sci

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“…As such, the feasibility of using various agro-industrial waste to manufacture binderless boards has been investigated. Lignocellulosic agro-industrial byproducts, such as inter alia, kenaf core [3], oil palm biomass [4], moso bamboo [5], and rice straw [6] have been used to manufacture binderless boards. Although the exact determinants of the self-bonding mechanism are yet to be elucidated, the thermosetting behavior of lignin at elevated temperatures [7], polymerization of hot water extractives [8], particle size [9], and lignin-furfural resin formation [10] have been cited as possible causes of self-bonding between composite fibres.…”

Section: Introductionmentioning

confidence: 99%

The effects of chemical components and particle size on the mechanical properties of binderless boards made from oak (Quercus spp.) logs degraded by shiitake fungi (Lentinula edodes)

et al. 2018

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Binderless boards are composite boards that rely on self-bonding mechanisms for inter-fibre bonding. Quercus acutissima and Quercus serrata logs degraded by Lentinula edodes (shiitake fungi) were used in this study to investigate whether physical and chemical changes induced by shiitake fungi can enhance board mechanical properties. Binderless boards were manufactured with 0.8 g/cm 3 target density, 220 °C pressing temperature, 5 MPa pressure, and pressing duration of 10 min. Boards made from logs degraded for ≥ 26 months were stronger than control boards and met modulus of rupture (MOR) and internal bonding (IB) requirements for fibreboards. Chemical composition and particle size distribution of the wood powder used to make the boards were determined to elucidate the drivers of board mechanical properties. The proportion of small particles (< 150 µm) showed a strong positive correlation with MOR for both species and hot water extractives showed a strong positive correlation with IB for Q. acutissima boards. Introduction of shiitake fungi pre-treatment to the production process may enhance the mechanical strength of binderless boards.

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“…The most essential non-wooden cellulosic material such as corn [5], wheat [6], rice [7], and soybean [8] are very well known for the usefulness of their straws in diverse applications.…”

Section: Introductionmentioning

confidence: 99%

A feasibility study on semi industrial nozzleless electrospinning of cellulose nanofiber

et al. 2015

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The current study focuses on the production of cellulose nanofiber through semi-industrial nozzleless electrospinning process. The cellulose biopolymer used for spinning process was extracted from rice straw as renewable, abundant, and inexpensive natural resource. The electrospinning device comprising one needle is extremely inefficient because of low productivity level of about 0.3 g/h. Thus, using the nozzleless electrospinning system guarantees the high productivity of nanofiber web for diverse applications. The successful electrospinning process is accomplished through systematic control of the surface tension, viscosity, and electric conductivity of aqueous solutions of cellulose. Moreover, a design expert software was used for providing experimental plan for the investigation of the influence of the operational conditions on the spinning properties of the selected solution. The polyvinyl alcohol with a weight ratio of 60 % relative to cellulose content was used as a biocompatible polymer to facilitate electrospinning process for producing the aqueous cellulose solution of 0.63 wt%. Based on the scanning electron microscopy images, and various selected parameters, namely, the drum rotation rate of 9 rpm, high voltage range of ±55 kV, the spinning temperature of 41°C, and 10-cm distance between drum and collector an average diameter of 89 ± 1 nm was arrived. The composite nanofibers used for filter production and their performance were evaluated by porosity analysis and permeability tests. Results show the negative impact of the weak mechanical strength as an obstacle in Penetration test. (It promotes by higher electrospinning time and reaching proper stiffness in web layer.) The permeability tests show a maximum value of 3.5 cm 3 /cm 2 /s at the maximum pressure of 120 Pa.

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Properties of binderless board made from rice straw: The morphological effect of particles

Cited by 47 publications

References 17 publications

Steam treatment to enhance rice straw binderless board focusing hemicellulose and cellulose decomposition products

Steam treatment to enhance rice straw binderless board focusing hemicellulose and cellulose decomposition products

The effects of chemical components and particle size on the mechanical properties of binderless boards made from oak (Quercus spp.) logs degraded by shiitake fungi (Lentinula edodes)

A feasibility study on semi industrial nozzleless electrospinning of cellulose nanofiber

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