Improving Mechanical Properties of Thermoset Biocomposites by Fiber Coating or Organic Oil Addition

Table 1

Composite sample types and their thicknesses.

Resin type	Fiber type	Fiber content (weight %)	Oil addition; (weight %)	Fiber coating	Average thickness; (mm)	Thickness standard deviation; (sample-to-sample); (mm)
Epoxy	Fiberglass	39.1 ± 1.6%	No oil	No coating	0.493	0.023
	Hemp	22.8 ± 0.8%			0.636	0.045
	Fiberglass	38.5 ± 0.9%	2% linseed oil	No coating	0.506	0.022
	Hemp	27.2 ± 0.7%			0.587	0.035
	Fiberglass	47.5 ± 1.8%	10% linseed oil	No coating	0.397	0.020
	Hemp	30.3 ± 3.7%			0.590	0.023
	Fiberglass	44.4 ± 1.2%	2% pine oil	No coating	0.392	0.013
	Hemp	27.8 ± 2.5%			0.634	0.054
	Fiberglass	46.0 ± 2.6%	10% pine oil	No coating	0.404	0.028
	Hemp	30.3 ± 1.5%			0.570	0.033
	Fiberglass	32.9 ± 2.5%	No oil	A-APTES	0.624	0.077
	Hemp	25.8 ± 0.4%			0.621	0.031
	Fiberglass	39.4 ± 3.0%	No oil	B-APTES	0.516	0.067
	Hemp	26.9 ± 1.1%			0.620	0.033
UVL	Fiberglass	36.5 ± 1.4%	No oil	No coating	0.576	0.025
	Hemp	24.5 ± 0.8%			0.699	0.031
	Fiberglass	30.2 ± 2.6%	No oil	A-APTES	0.709	0.094
	Hemp	18.4 ± 0.7%			0.953	0.047
	Fiberglass	32.2 ± 2.3%	No oil	B-APTES	0.681	0.060
	Hemp	26.1 ± 2.9%			0.678	0.106