Acetylation of rice straw for thermoplastic applications

Zhang, Guangzhi; Huang, Kai; Jiang, Xue; Huang, Dan; Yang, Yiqi

doi:10.1016/j.carbpol.2013.03.069

Cited by 52 publications

(35 citation statements)

References 24 publications

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“…However, the rigid polymer (cellulose) is embedded in a thermoplastic matrix (lignin and hemicellulose) . RS decomposes before its melting temperature; this means it is difficult to make RS form sheets or any other shape without the use of an adhesive such as urea resin or isocyanate resin.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical changes in rice straw after composting and its effect on rice‐straw‐based composites

Huang

Zhao

et al. 2017

J of Applied Polymer Sci

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A composting method was applied to improve the processability of rice straw (RS) and its interfacial interaction with a biodegradable resin, hydrolyzed‐soy‐protein‐modified urea formaldehyde adhesives. The composted RS was characterized by fiber testing, Fourier transform infrared spectroscopy, thermogravimetry, differential scanning calorimetry, and scanning electron microscopy. We found that the particle size of RS was reduced from 0.6–2.0 to 0.2–0.6 mm. The cellulose content decreased, and the lignin content increased; unstable bonds were decomposed after composting. All of the results were beneficial for improving the plasticity of RS. Composted RS with inoculant exhibited a higher peak degradation temperature (352 °C) than the untreated RS (347 °C). The porous structure and tissue in RS were destroyed by the microorganism. The best bonding results were obtained by the composted RS with inoculant. Compared with untreated composites, the modulus of rupture, modulus of elasticity, and tensile strength of the composites were improved by 14.94, 25.36, and 27.21%, respectively. In addition, a mechanism of the structural changes of RS during composting was also proposed. The full biodegradable composites have potential applications in agriculture toward the achievement of sustainable development. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44878.

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Section: Introductionmentioning

confidence: 99%

Physicochemical changes in rice straw after composting and its effect on rice‐straw‐based composites

Huang

Zhao

et al. 2017

J of Applied Polymer Sci

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“…As shown in Figure (a), which depicts the spectrum of DW before and after modification, the bands at 470 and 790 cm −1 were caused by the Si‐O bond vibration of DW. The peaks at 620 and 1082 cm −1 were both attributed to the stretching and bending vibrations of N‐H groups . And the broad band at around 3458 cm −1 might be ascribed to the O‐H stretching vibration from water molecules in DW.…”

Section: Resultsmentioning

confidence: 96%

Utilization of industrial waste as a novel adsorbent: Mono/competitive adsorption of chromium(VI) and nickel(II) using diatomite waste modified by EDTA

Sha

Fan

2017

Applied Organom Chemis

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The adsorption of Cr(VI) and Ni(II) using ethylenediaminetetraacetic acidmodified diatomite waste (EDTA-DW) as an adsorbent in single and binary systems was investigated. The EDTA-DW was characterized using various analytical techniques, including Fourier transform infrared spectroscopy, thermogravimetric analysis, Brunauer-Emmett-Teller measurements, X-ray diffraction, scanning electron microscopy and energy-dispersive spectrometry.The adsorption experiment was conducted by varying pH, adsorbent dosage, initial concentration and temperature. In the single system, the sorption data for Cr(VI) fitted the Langmuir isotherm, but the Ni(II) adsorption data fitted well the Freundlich isotherm. The maximum sorption capacity of Cr(VI) and Ni(II) was 2.9 mg g −1 at pH = 3 and 3.64 mg g −1 at pH = 8, respectively. The kinetic data for both Cr(VI) and Ni(II) followed well the pseudo-second-order kinetic model in single and binary systems. Meanwhile, the extended Langmuir and extended Freundlich multicomponent isotherm models were found to fit the competitive adsorption data for Cr(VI) and Ni(II). In addition, in the binary system, the existence of Ni(II) hindered the adsorption of Cr(VI), but the presence of Cr(VI) enhanced the removal of Ni(II). This study provides some realistic and valid data about the usage of modified diatomite waste for the removal of metal ions.

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“…The attachment of the acetyl group could be further confirmed by the x-ray diffraction (XRD) [32]. The compatibility of acetic acid with diethyl phthalate (plasticizer) strengthen the elongating capacity of the acetylated fibre [32] (Zhang, et al, 2013). In addition, the phosphotungstic acid (H 3 PW 12 O 40 ·6H 2 O) could be an effective catalyst for the acetylation of the straw based cellulose [33].…”

Section: Introductionmentioning

confidence: 99%

“…It was reported that when the acetylated rice straw was casted to form transparent films, all the cell surface of the fibre could be altered due to its irregular structure. The attachment of the acetyl group could be further confirmed by the x-ray diffraction (XRD) [32]. The compatibility of acetic acid with diethyl phthalate (plasticizer) strengthen the elongating capacity of the acetylated fibre [32] (Zhang, et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Key advances in development of straw fibre bio-composite boards: An overview

Aladejana

Fan

2020

Mater. Res. Express

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In recent years, considerable attention have been given to the development and utilization of biodegradable fibres for bio-composite boards. This is due to the increase in the environmental consciousness and the need for sustainable development which enable establishment of new materials majorly for packaging, aircraft, furniture, and automobile. Straw fibres (wheat, rice, and corn fibre) are the most available natural agricultural wastes products, which has been utilized for the production of these new materials. This paper hence reviews the enhancement in production methodology and properties of the straw fibres bio-composite boards to add further scientific knowledge to the potentiality of using agricultural fibres as value added products. The future replacement of conventional wood fibres for the production of bio-composite panels, especially with agricultural wastes, could be centered on straw fibres. The introduction of straw fibres in polymer matrices were presented based on various research outcomes. Biodegradable fibres could be regarded as a good fibrous composite material. Although, more efforts are still needed in developing facile straw fibre composite production methods and materials with robust industrial and domestic applications.

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Acetylation of rice straw for thermoplastic applications

Cited by 52 publications

References 24 publications

Physicochemical changes in rice straw after composting and its effect on rice‐straw‐based composites

Physicochemical changes in rice straw after composting and its effect on rice‐straw‐based composites

Utilization of industrial waste as a novel adsorbent: Mono/competitive adsorption of chromium(VI) and nickel(II) using diatomite waste modified by EDTA

Key advances in development of straw fibre bio-composite boards: An overview

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