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Light processable hydrogels were successfully fabricated by utilizing maize starch as raw material. To render light processability, starch was gelatinized and methacrylated by simple reaction with methacrylic anhydride. The methacrylated starch was then evaluated for its photocuring reactivity and 3D printability by digital light processing (DLP). Hydrogels with good mechanical properties and biocompatibility were obtained by direct curing from aqueous solution containing lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) as photo-initiator. The properties of the hydrogels were tunable by simply changing the concentration of starch in water. Photo-rheology showed that the formulations with 10 or 15 wt% starch started curing immediately and reached G’ plateau after only 60 s, while it took 90 s for the 5 wt% formulation. The properties of the photocured hydrogels were further characterized by rheology, compressive tests, and swelling experiments. Increasing the starch content from 10 to 15 wt% increased the compressive stiffness from 13 to 20 kPa. This covers the stiffness of different body tissues giving promise for the use of the hydrogels in tissue engineering applications. Good cell viability with human fibroblast cells was confirmed for all three starch hydrogel formulations indicating no negative effects from the methacrylation or photo-crosslinking reaction. Finally, the light processability of methacrylated starch by digital light processing (DLP) 3D printing directly from aqueous solution was successfully demonstrated. Altogether the results are promising for future application of the hydrogels in tissue engineering and as cell carriers

11 October 2020

Light Processable Starch Hydrogels

Marco Sangermano erasmus+

14 February 2020

Flying to Australia for my Erasmus+

photopolymerization

9 March 2020

A new semester starts today despite coronavirus

30 September 2019

Inizia il nuovo corso di Scienza e Tecnologia dei Materiali Polimerici

After few days of stop-over in New York I am now ready for the conference in Monterey. Ready to follow all the talks about recent advanced in photopolymerization as well as to show our recent results in the field.

15 September 2019

Ready for Photopolymerization Fundamentals 2019

14 October 2019

Photopolymer Lab at the VII International Baekeland Symposium

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