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Wood-Ceramics are prepared from a shaped mixture of rice husk and high-temperature coal tar pitch by pyrolysis at different temperatures. Subsequently, the wood-ceramics are modified by pyrolysis of different mixture precursors with adding lignin. The effect of pyrolysis temperature, lignin content and lignin types on the microstructure, yield, volume shrinkage, open porosity ratio and bending strength of the wood-ceramics is discussed, respectively. The results show that the microstructure, volume shrinkage ratio, and bending strength of wood-ceramics are significantly dependent on the pyrolysis temperature, lignin content and types. When the pyrolysis temperature increases from 500 to 1200 A degrees C, the (002) crystal planes peaks of the wood-ceramics move to a higher diffraction angle and the intensity of these peaks increase. The volume shrinkage ratio and bending strength of the wood-ceramics increase from 41.2 to 55.5 % and 10.2 to 31.2 MPa, respectively. Moreover, the open porosity ratio first decreases from 35.6 to 26.2 %, and then increases to 30.1 %. The enzymatic hydrolysis lignin (EHL) plays an important role in improving the order and graphitization, porous content and open porosity of the EHL-modified wood-ceramics, whereas the lignosulfonate causes the bending strength of the lignosulfonate-modified wood-ceramics to decrease.
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JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
ISSN: 1574-1443
Year: 2012
Issue: 5
Volume: 22
Page: 1113-1121
1 . 1 7 4
JCR@2012
3 . 9 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:3
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 16
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
Affiliated Colleges: