Research Article

Biobased Materials Production from Biodiesel Residuals of Rapeseed

Table 1

Mean values of tensile properties for comparisons of importance of the use of rapeseed type, glycerol content in the samples, press temperature, and press time. In the comparisons all samples are compared differing only in one parameter. That means, for example, that both rapeseed cake and flour and all glycerol contents and pressing times are included when the pressing temperature is evaluated.

SourceMaximum stress (MPa)Strain at maximum stress (%)Young’s modulus (MPa)

Rapeseed type
Cake1.55a0.67a758.4a
Flour1.31a0.64a801.4a
Glycerol content
0%1.93a0.22c1398a
10%1.43b0.60b598.5b
20%0.86c1.12a230.0c
Pressing temperature
140°C1.28b0.63a713.9b
160°C1.46ab0.63a782.8b
180°C1.73a0.75a925.0a
Pressing time
5 min1.36a0.69a675.3b
10 min1.51a0.64a845.3a
20 min1.38a0.67a809.2a
30 min1.53a0.59a832.0a

Means with the same letters within a column and under the same subheading do not differ significantly (Duncan’s Multiple Range Test 0.05).