Author Archives: Steve

PhD Graduate Assistantships available

The Group has two graduate assistantships available for prospective PhD students.

The first candidate will develop new lignin-containing photoactive resins for additive manufacturing by 3D printing.

The second candidate will develop a new catalytic fractionation technology to continuously extract lignin from whole biomass.

Interested candidates should apply at the Penn State ABE website.

Questions can be directed to Steve.

New manuscript on 3D printing

Check out our manuscript on 3D printing with lignin-containing resins at ACS Applied Materials & Interfaces. There is also a Preprint at ChemRxiv that is freely available.

Title: Lignin-Containing Photoactive Resins for 3D Printing by Stereolithography

Abstract: Generating compatible and competitive materials that are environmentally sustainable and economically viable is paramount for the success of additive manufacturing using renewable materials. We report the successful application of renewable, modified lignin-containing photopolymer resins in a commercial stereolithography system. Resins were fabricated within operable ranges for viscosity and cure properties, using up to 15% modified lignin by weight. A 4-fold increase in ductility in cured parts with higher lignin concentration is noted compared to commercial stereolithography resins. Excellent print quality was seen in modified lignin resins, with good layer fusion, high surface definition, and visual clarity. These materials can be used to generate new products for additive manufacturing applications and help fill vacant material property spaces, where ductility, sustainability, and application costs are critical.