Biomodification of Flax Fibrous Materials for Increase of Sorption to Organic Compounds
Table 2
Changes in the composition of not cellulosic polymeric components and in the pore structure of flax fibers after the chemical and biochemical modification.
Modifying agent (stage)
Content of noncellulosic polysaccharides (wt.%)
Content of acid soluble lignin in Н2SO4 (LS, wt.%)
Specific surface area (SA, m2·g−1)
Total internal pore volume (VP ± 0.001, cm3·g−1)
Polyuronides (Pu)
Hemicelluloses (Hc)
−
3.3
13.3
0.6
14.7
0.007
NaOH
2.0
8.1
0.8
21.9
0.012
NaBH4
1.0
5.4
5.0
14.3
0.009
CH3NaO3S
0.6
4.2
6.6
14.5
0.010
CP
(Сat)
3.3
11.9
0.6
28.5
0.020
(Red)
2.5
8.5
2.3
26.3
0.013
CP + G
(Сat)
3.3
10.9
0.6
28.1
0.020
(Red)
2.5
8.5
3.6
27.6
0.015
CP + X
(Сat)
3.3
10.7
0.6
28.3
0.020
(Red)
2.5
8.1
4.2
28.0
0.016
CP + G + X
(Сat)
3.3
10.3
0.6
27.8
0.020
(Red)
2.5
7.6
4.8
28.1
0.017
CP=cellulolytic preparation; +G and +X=additives of exogalactosidase and exoxylosidase; processing step: (Сat)=enzymatic catalysis, (Red)=activation of reducing agents; total concentration of lignin in fiber is 7.3 wt.%.
