Illuminating new pathways: beyond conventional photochemistries for multi-photon 3D laser printing

Area of Science:

• Advanced materials science
• Photopolymerization chemistry

Background:

• Multi-photon 3D laser printing (MPLP) predominantly uses (meth)acrylate chemistries.
• Expanding photochemistry options is vital for specialized MPLP ink development.

Purpose of the Study:

• To review emerging photocrosslinking chemistries for MPLP beyond (meth)acrylates.
• To discuss photoinitiator-dependent and independent systems.
• To analyze the impact of network architecture on material properties and applications.

Main Methods:

• Literature review of advanced photopolymerization techniques.
• Categorization of chemistries based on initiation mechanism (intermolecular vs. intramolecular).
• Analysis of structure-property relationships in MPLP-printed materials.

Main Results:

• Identified novel intermolecularly photoinitiated systems requiring photoinitiators.
• Highlighted intramolecularly initiated systems that do not require photoinitiators.
• Demonstrated the influence of network architecture on material properties and potential uses.

Conclusions:

• Non-(meth)acrylate chemistries offer new avenues for MPLP ink formulation.
• The choice of initiation mechanism and resulting network architecture significantly impacts material performance.
• Further research into diverse photochemistries will enhance MPLP's application scope.