Nano-silica and SiO 2 /CaCO 3 nanocomposite prepared from semi-burned rice straw ash
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Figure 1
FT-IR spectra of silica nano-particles prepared from thermally treated SBRSA.
Figure 2 FT-IR spectra of CaCO 3 core particles (C) and SiO 2 /CaCO 3 nanocomposites prepared at different SiO 2 :CaCO 3 molar ratios 1:15 (CS1), 1:10 (CS2) and 1:5 (CS3).
SEM images of thermally treated SBRSA at magnifications (a) 150 · and (b) 350 · .
Figure 3
Where: X2 = Ash of paper loaded with filler, X0 = Ash of nonloaded paper and X1 = Ash of added filler. The paper grammage in g/m 2 was calculated according to Tappi test method 410.
according to Tappi test method T211 om-93. The filler reten- tion ( R ) was calculated as follows: Retention ¼ X 2 X 0 X 1 : 100 % ð 1 Þ
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