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the composites. Density of composites treated with 2.1, 2.8, 4.2, or 5.6 MPa were 929, 1,052, 1,212, or 1,275 kg . m 3 , respectively. Conversely, thickness of the composites decreased when treated with 2.1, 2.8, 4.2, or 5.6 MPa to 0.470, 0.430, 0.361, or 0.358 mm, respectively.
Fig. 9. Effect of various mold pressures on the flexural properties of composites Influence of PW dosage on the Flexural Properties of Composites The influence of DDGS-PW and PRO-PW dosages on the flexural properties of composites is presented in Table 1. Neat DDGS (100%) produced a panel that had the highest density and lowest thickness of all DDGS-PW composites tested but exhibited the lowest flexural values of all the DDGS-PW composites tested (Table 1). Increasing PW content increased the flexural values of all the DDGS-PW composites compared to neat DDGS. The highest flexural properties were obtained from composites containing 50:50 DDGS-PW (% wt.). Increasing the concentration of PW in the 10:90, 15:85, and 25:75 DDGS-PW (% wt.) composites resulted in a reduction of flexural properties compared to other DDGS-PW composites ( LH 50:50 and 75:25 % wt.). DDGS-PW composites had flexural properties comparable to PRO-PW composites for the 50:50 formulations (Table 1). However, the flexural properties of PRO-PW composites to DDGS-PW composites differed depending on the concentrations tested. For example, neat 100% PRO produced a panel that cracked and shattered within 24 h after removal from the mold and therefore could not be tested. Composite formulations of 10PRO-PW, 15PRO-PW, and 25PRO- PW had superior flexural properties compared to 10DDGS-PW, 15DDGS-PW, and 25DDGS-PW. Soy flours ( HJ . SBM, Prolia, Prosante, and SPI) have been employed in numerous studies to fabricate fiberboards (Zhong HWDO . 2001; Mo HWDO . 2001; Amaral- Labat HWDO . 2008; Frihart HWDO . 2010; 2014; United (USB) Soybean 2010; Jeon HWDO . 2011; Gu HW DO . 2013; Vnučec HW DO . 2015). SBM and DDGS have different protein compositions and concentrations. Nevertheless, the adhesive properties of DDGSs were
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Tisserat et al . (2018). “DDGS - PW fiberboards” B io R esources 13(2), 2678-2701.
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