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Niu, Min
Publications (2 of 2) Show all publications
Niu, M., Wang, X. (., Hagman, O., Karlsson, O. & Xie, Y. (2015). Microstructure of Burned Ultra-Low-Density Fiberboards using Plant Fiber as the Matrix and Si-Al compounds as the Filler (ed.). BioResources, 10(2), 2903-2912
Open this publication in new window or tab >>Microstructure of Burned Ultra-Low-Density Fiberboards using Plant Fiber as the Matrix and Si-Al compounds as the Filler
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2015 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 10, no 2, p. 2903-2912Article in journal (Refereed) Published
Abstract [en]

Ultra-low-density fiberboards (ULDFs) were prepared by a liquid frothing technique using plant fibers as the matrix and Si-Al compounds as the filler to be used as a versatile bio-based composite. Si-Al compounds played an important role in the fire properties of ULDFs. Fire intensity and the amount of volatiles were significantly restrained because of the Si-Al compounds. To determine the combustion mechanism of ULDFs treated by Si-Al compounds, the microstructure of burned specimens was tested by chemical analysis, X-ray diffractometer (XRD), and infrared spectrometer (IR). According to the results from gas chromatography, glucose, xylose, and mannose disappeared in the bottom ashes. After combustion, the XRD profiles of the two ashes became weaker and broader; the sharpest peaks at 18.6o (2) that represented Si-Al compounds remained; the obvious peaks at 22o (2) from cellulose were gone. The results from IR suggested the characteristic functional groups OH, CH, and C=O from carbohydrate also disappeared, and absorbance at 1200 to 400 cm-1, which attributed to the vibration of Si-O, Al-O, and Si- O-Si bonds, increased. In conclusion, fibers are almost completely pyrolyzed at 780 °C. The crystalline structure of Si-Al compounds is rearranged and more amorphous silicon oxide and aluminum oxide are generated.

Keywords
Ultra-low density fiberboards (ULDFs), Si-Al compounds, Combustion, Microstructure, Forestry, agricultural sciences and landscape planning - Wood fibre and forest products, Skogs- och jordbruksvetenskap samt landskapsplanering - Träfiber- och virkeslära
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-4978 (URN)2fe0e71c-f48a-4329-887c-bbefeab74bc1 (Local ID)2fe0e71c-f48a-4329-887c-bbefeab74bc1 (Archive number)2fe0e71c-f48a-4329-887c-bbefeab74bc1 (OAI)
Note

Validerad; 2015; Nivå 2; 20150408 (aliwan)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Niu, M., Hagman, O., Wang, A., Xie, Y., Karlsson, O. & Cai, L. (2014). Effect of Si-Al compounds on fire properties of ultra-low density fiberboard (ed.). Paper presented at . BioResources, 9(2), 2415-2430
Open this publication in new window or tab >>Effect of Si-Al compounds on fire properties of ultra-low density fiberboard
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2014 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 9, no 2, p. 2415-2430Article in journal (Refereed) Published
Abstract [en]

An ultra-low density fiberboard was made of plant fiber using a liquid frothing approach. The inflammability of the plant fiber limited its application as a candidate for building insulation materials and packaging buffering materials. Si-Al compounds were introduced into the foaming system because of the high temperature resistance of Si and Al compounds. The results from energy-dispersive spectroscopy suggested that the Si and Al relatively evenly covered the surface of the fibers, and their weight ratios in the material increased as a function of the amount of Si-Al compounds. The increasing weight ratios of Si and Al affected the fire properties of the material, reducing the released amount of heat, smoke, and off-gases such as CO and CO2, as well as decreasing the mass loss percentage, shown through the use of a Cone Calorimeter. It follows that Si-Al compounds have an evident collaborative effect on the halogen fire retardant. The system can effectively restrain the fire hazard intensity and the yields of solid and gas volatiles.

National Category
Other Mechanical Engineering Bio Materials
Research subject
Wood Products Engineering; Wood Physics
Identifiers
urn:nbn:se:ltu:diva-9579 (URN)839e9faa-5bba-48b0-8216-864869ebfc65 (Local ID)839e9faa-5bba-48b0-8216-864869ebfc65 (Archive number)839e9faa-5bba-48b0-8216-864869ebfc65 (OAI)
Note
Validerad; 2014; 20140804 (johsod)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
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