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Table 1 Chemical composition of hemp fibres after different treatments

From: Comparison of traditional field retting and Phlebia radiata Cel 26 retting of hemp fibres for fibre-reinforced composites

Treatment Treatment period Amount (%)
Glu GalA Gal Ara Xyl Man Lignin
Untreated 0 60.0 (2.2)f 7.3 (0.4)a 2.1 (0.2) 1.3 (0.3) 1.2 (0.1) 3.0 (0.3) 4.4 (0.3)d
Washed 40 °C 60 min 67.2 (2.6)de 8.3 (0.4)a 2.1 (0.1) 1.2 (0.1) 1.3 (0.2) 4.6 (0.2) 5.3 (0.2)bcd
HTT 30 min 67.0 (1.3)de 4.5 (0.4)b 1.8 (0.1) 0.8 (0.1) 1.1 (0.1) 4.5 (0.2) 4.6 (0.2)cd
HTT 60 min 67.9 (2.8)de 5.5 (0.8)cd 2.1 (0.3) 1.1 (0.3) 1.4 (0.2) 3.5 (0.4) 5.0 (0.3)cd
Field retting 7 days 63.9 (1.0)ef 5.4 (0.6)bc 2.0 (0.2) 0.7 (0.2) 1.1 (0.2) 4.0 (0.4) 5.3 (0.9)bcd
14 days 70.2 (0.5)cde 3.1 (0.4)efg 2.4 (0.2) 0.4 (0.0) 0.8 (0.2) 3.4 (0.0) 6.1 (0.9)bc
20 days 66.9 (1.2)de 3.6 (0.4)def 2.0 (0.0) 0.6 (0.1) 1.0 (0.2) 3.9 (0.2) 8.1 (0.3)a
Fungal retting 7 days 81.8 (1.6)ab 4.2 (0.2)de 2.4 (0.1) 0.7 (0.0) 1.3 (0.1) 4.7 (0.3) 6.1 (1.1)bc
14 days 83.4 (3.8)a 2.0 (0.2)gh 2.3 (0.2) 0.5 (0.1) 1.3 (0.1) 4.4 (0.3) 5.3 (0.1)bcd
20 days 76.7 (1.5)bc 1.6 (0.0)h 2.0 (0.0) 0.5 (0.0) 1.1 (0.0) 4.5 (0.4) 6.7 (0.5)ab
PectinaseA 90 min 71.8 (0.8)cd 4.3 (0.2)cd 1.7 (0.0) 0.7 (0.0) 0.9 (0.0) 5.6 (0.1) 4.8 (0.6)cd
HTT + pectinaseA 90 min 69.5 (3.9)de 2.9 (0.3)fg 1.5 (0.1) 0.7 (0.1) 0.7 (0.1) 4.2 (0.3) 4.2 (0.5)d
  1. Values are means (standard deviation) for three replicates. In each column, values that do not share a letter are significantly different at the 5% level
  2. Glu glucan, GalA galacturonan, Gal galactan, Ara arabinan, Xyl xylan, Man mannan, Lignin Klason lignin
  3. AWith or without autoclave treatment (HTT) at 1 bar (121 °C) for 30 min before the pectinase treatment (Liu et al. 2016b)