Abstract
The semi-carbonization method is a kind of waste treatment to carbonize rice straw fiber at low semi-carbon temperature. The rice straw fiber is carbonized incompletely, which serves as building materials additive. The results reveal that the optimized carbonization condition is at 313 °C for 20-40 min with H3PO4 as activator. The structure of semi-carbonized straw fiber displays a large quantity of micropores, with which the wall thickness and the pore diameter are in the range of 1-4 μm, presenting the iodine sorption value of 1 320-1 470 mL/g and the methylene blue sorption value of 1 330-1 460 mg/g, respectively. Moreover, the acidic oxygen-containing groups impart the structure higher sorption of polar molecules. The semi-carbonized rice straw fiber with open and closed micro-mesopores demonstrates good hygroscopicity, implying the potential application as a functional additive in building materials.
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Funded by Key Projects of the National Science & Technology Pillar Program (No.2013BAC13B01) and Independent Research of State Key Laboratory of Silicate Materials for Architectures
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Jian, S., Wang, T., Ma, B. et al. Preparation and characterization of semi-carbonized rice straw fiber. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 496–502 (2016). https://doi.org/10.1007/s11595-016-1398-4
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DOI: https://doi.org/10.1007/s11595-016-1398-4