Pyridinium-based acrylate additives for multifunctional 3D-printable photosensitive resins with antibacterial, antistatic, and high-strength properties

Abstract

The increasing demand for biomaterial safety in precision medical device manufacturing and electronic packaging highlights the critical need for the rapid development of 3D-printable photosensitive resins that offer high mechanical strength, durable antibacterial effectiveness, and consistent antistatic properties. Traditional approaches involving multiple additives often result in poor compatibility, low success rates in 3D printing, compromised functionality or mechanical properties, and insufficient functional stability and longevity. To address this challenge, we introduce a new category of pyridinium-based acrylate photosensitive additives. By adjusting the quantity of pyridinium functional groups within a single additive, we have successfully achieved multifunctionalization of the 3D printing resin. The findings indicated that the pyridinium-based acrylate additive endows the 3D-printed photosensitive resin with exceptional antibacterial efficacy (>99.99% against Escherichia coli and Staphylococcus aureus), strong antistatic performance (resistance: 10⁹ Ω), and high tensile strength (40.86 MPa). Furthermore, the resin demonstrated enduring and consistent antibacterial and antistatic properties. The study suggests that the novel pyridinium-based acrylate photosensitive additive can achieve a breakthrough in enhancing multifunctional 3D printing resin performance.  

Keywords

Antibacterial / Antistatic / Photosensitive resin / Pyridine-based acrylic ester / UV-light curing 3D printing

Funding

This work was financially supported by Hangzhou Normal University (grant nos. 114095F49123259 and 4095F49123037).

Conflict of Interest

The authors declare no conflict of interest.

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