Abstract
Different hemp-based mono-layer and composite nonwovens were prepared to study the oil filtration properties and to select better product for practical application. Hemp/cotton spunlaced nonwoven, hemp/viscose spunlaced nonwoven, hemp/viscose spunlaced nonwoven impregnated polyacrylic adhesives, hemp woven fabric, and PA6 nanofiber collected on the surface of hemp/viscose spunlaced nonwoven were prepared to make a comparison of filtration properties. Then, two-layer/multi-layer composite nonwovens were also prepared to make a comparison of filtration properties and to research the effect of layer number on thickness, weight, mean pore diameter, maximum pore diameter, air permeability, filtration accuracy, and pressure drop. Lastly, the comparison of filtration properties between commonly used oil filtration two-layer/multi-layer composite nonwovens and our new two-layer/multi-layer composite nonwovens was respectively made to choose a better product for application. The results indicated that composite nonwoven which contained a two layer structure of hemp/viscose spunlaced nonwoven layer and PA6 nanofiber layer had better filtration properties for practical application.
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