Researchers Develop Nontoxic Photoinitiators for 3D Printing
Nanyang Technological University scientists have created safe alternatives to toxic compounds used in 3D printing resins.
Updated on Oct. 22, 2026 in Chemistry
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Scientists at Nanyang Technological University have developed a new class of nontoxic aryl diazirine photoinitiators for 3D printing. These compounds allow liquid resins to solidify under light without the reproductive toxicity associated with standard industry chemicals.
Why it matters
The chemical industry requires safer photoinitiators because the European Union is currently banning existing standard compounds like TPO and BAPO due to their toxicity. This discovery provides a viable alternative that remains functional for industrial applications.
The researchers successfully demonstrated the utility of these compounds by producing seals and microfluidic channels using soybean-oil-based resins. The material initiates polymerization via light exposure and releases nitrogen gas to prevent shrinkage.
The players
Nanyang Technological University
This public autonomous research university in Singapore is a leading institution for science and technology education.
European Union
This political and economic union of member states is currently implementing regulatory bans on specific toxic chemical compounds.
The details
The newly developed aryl diazirine compounds are soluble in water and remain in a liquid state at room temperature. The team also utilized this technology to create a specialized bioadhesive capable of stretching to over 3.5 times its original length.
Timeline
The research findings were published on October 22, 2026.
The Big Picture
This development represents a shift away from traditional chemical standards mandated by the European Union ban on TPO and BAPO photoinitiators. It addresses a critical safety gap in additive manufacturing by replacing legacy toxic additives with safer synthetic alternatives.
This technology could lead to the production of safer consumer goods and medical devices through the use of nontoxic 3D printing resins. It paves the way for medical-grade bioadhesives that offer increased durability and flexibility in healthcare applications.
The takeaway
This discovery demonstrates how sustainable chemistry can solve urgent regulatory hurdles in manufacturing. Researchers and industrial firms are increasingly prioritizing nontoxic materials to ensure safety and compliance with international environmental standards.
What happens next
The research team plans to conduct further studies to bridge the gap between their current laboratory findings and the requirements for industrial-scale manufacturing.
Further reading
For more on the latest developments in materials research, visit the Chemistry section.
Source note: This article includes information reported by Phys.
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