Cited by 40Photopolymerization techniques and applications3D Printing in Biomedical ResearchHydrogels: synthesis, properties, applications

A high-absorbance water-soluble photoinitiator nanoparticle for hydrogel 3D printing: synthesis, characterization and in vitro cytotoxicity study

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Ghazali, Hanieh Sadat, Askari, Esfandyar, Seyfoori, Amir, Naghib, Seyed Morteza·2023·Scientific Reports

Abstract

Light-based hydrogel crosslinking is a new approach in rapid and high-resolution 3D printing; however, using this method in tissue engineering is challenging due to the toxicity of photoinitiators, their solvents, and their low efficiency. Herein, a novel, water-soluble photoinitiator with high efficiency in light-based 3D printing is introduced. Low-cost photoinitator, 2,4,6-trimethylbenzoylphenyl phosphinate, is converted into nanoparticles via a microemulsion method and dispersed in water. Cell toxicity assays were performed to prove that these nanoparticles are non-toxic and can be used in biomedical applications. Finally, the nanoparticles were utilized in the high-accuracy 3D printing of hydrogels. The results of this study indicate that these particles are potent to be used in bioprinting.

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Crossref · 10.1038/s41598-023-35865-3

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  • Residual photoinitiators in SLA printing inks may induce cytotoxicity, which is a key limitation of SLA printing.

    “Photoinitiators need to be added to SLA printing inks, and residual photoinitiators may induce cytotoxicity, a key limitation of SLA printing [103].”

    From Application of PLCL as a biodegradable polymer in biomedical engineering (2026) · cites this paper as [103]

    The Introduction says photoinitiators are critical to light-based hydrogel printing, and Results and discussion (‘Cell toxicity of TPO nanoparticles’; page unavailable) calls their toxicity a major bioprinting challenge. The paper studies DLP printing rather than SLA and does not establish that residual photoinitiators in SLA inks cause cytotoxicity; it reports that its own unreacted nanoparticles were not toxic at the tested working concentrations. (LLM, conf=0.84)

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Research works printed but not linked: 2

  1. [20]Bernauer U Scientific committee on consumer safety trimethylbenzoyl diphenylphosphine oxide (TPO) Fluid Phase Equilib. 2014 10.2772/45370 · DOI
  2. [52]Yue K Synthesis, properties, and biomedical applications of gelatin methacryloyl (GelMA) hydrogels Biomaterials 2015 10.1016/j.biomaterials.2015.08.045 26414409 PMC4610009 · DOI · Paper page

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Authors
Ghazali, H. S., Askari, E., Seyfoori, A., & Naghib, S. M.
Affiliations
  • Iran University of Science and Technology (IR)
  • Academic Center for Education, Culture and Research (IR)
Corresponding author
Naghib, Seyed Morteza
Venue
Scientific Reports
Published
2023-05-26
Volume
13
Issue
1
Pages
8577-8577
ISSN
2045-2322 (ISSN-L)
OpenAlex
W4378473073
Cited by
40
References
52
Citations by year
2026: 9 · 2025: 17 · 2024: 8 · 2023: 6
FWCI
4.09
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Photopolymerization techniques and applications
  • Physical Sciences › Engineering › Biomedical Engineering › 3D Printing in Biomedical Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Hydrogels: synthesis, properties, applications
Keywords
water-soluble photoinitiators, microemulsion synthesis, cytotoxicity, bioprinting, tissue engineering
MeSH terms
Water, Hydrogels, Tissue Engineering, Nanoparticles, Tissue Scaffolds, Bioprinting, Printing, Three-Dimensional

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