United States Purdue University researchers say they are using cellulose extracted from industrial hemp to develop biodegradable superabsorbent materials that will be less polluting than those now used in disposable diapers (nappies), feminine hygiene products, agricultural water retainers and other applications. Widespread use of traditional non-renewable, non-biodegradable, petroleum-based absorbents has created environmental problems, exacerbated by the significant energy required for their production, according to Senay Simsek, university’s Department of Food Science, leading a team of researchers in the hemp project.
“Hemp hurds, found in the inner woody core of the hemp stalk, are highly absorbent due to their high cellulose content and low lignin levels. This makes them an excellent alternative for superabsorbent applications” Simsek said. The cellulose extracted from hemp fibres is ideal for products requiring high absorbency because its molecular structure can be modified to boost its water retention capabilities. Hemp bast fibres, the stringy outer core of hemp plant stems, while less absorbent, provide strength and durability.
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