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Water-Soluble Visible Light Sensitive Photoinitiating System Based on Charge Transfer Complexes for the 3D Printing of Hydrogels. | LitMetric

AI Article Synopsis

  • The study focuses on developing water-soluble photoinitiators to enhance 3D printing technologies using visible light, particularly LED light.
  • A new chalcone derivative dye was synthesized to act as a photoinitiator, paired with triethanolamine (TEA) as a coinitiator to create a charge transfer complex that boosts the photopolymerization process.
  • This new system shows improved solubility and mechanical properties, making it a promising and eco-friendly option for creating hydrogels through 3D printing.

Article Abstract

The development of visible-light 3D printing technology by using water-soluble initiating systems has attracted widespread attention due to their potential applications in the manufacture of hydrogels. Besides, at present, the preparation of water-soluble photoinitiators suitable for visible light irradiation (such as LEDs) still remains a challenge. Therefore, this work is devoted to developing water-soluble photoinitiators (PI)/photoinitiating systems (PIS) upon irradiation with a LED @ 405 nm. In detail, a new water-slightly-soluble chalcone derivative dye [()-3-(4-(dimethylamino) phenyl)-1-(4-(2-(2-(2-methoxyethoxy) ethoxy) ethoxy) phenyl) prop-2-en-1-one] was synthesized here and used as a PI with a water-soluble coinitiator, i.e., triethanolamine (TEA) which was also used as an electron donor. When combined together, a charge transfer complex (CTC) formed immediately which exhibited excellent initiating ability for the free radical photopolymerization of poly(ethyleneglycol)diacrylate (PEG-DA). In light of the powerful CTC effect, the [dye-TEA] CTC could not only exhibit enhanced water solubility and mechanical properties but could also be effectively applied for 3D printing. This CTC system is environmentally friendly and cost-saving which demonstrates a great potential to prepare hydrogels via photopolymerization.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8470713PMC
http://dx.doi.org/10.3390/polym13183195DOI Listing

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