3D printing composition based on RAFT and interpenetrating polymer network synergy

By using a specific ratio of free radical crosslinking monomers and cationic photoinitiators to synergistically react under light irradiation, an interpenetrating polymer network is formed, solving the problem of matching the strength and toughness of 3D printing resins. This achieves the control of material properties with high strength and high toughness, making it suitable for multifunctional 3D printing.

CN122278103APending Publication Date: 2026-06-26SUZHOU UNIV
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Patent Information

Application Number
CN202610386727.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-27
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing 3D printing resins have a narrow range of mechanical property control, poor crosslinking network uniformity, and insufficient toughness, making it difficult to achieve a balance between material strength and toughness, and lack effective methods for optimizing crosslinking networks.

Method used

By employing a specific ratio of free radical crosslinking monomers, biepoxide monomers, RAFT chain transfer agents, and cationic photoinitiators, RAFT polymerization and cationic ring-opening polymerization are carried out in a synergistic reaction under light irradiation to form an interpenetrating polymer network structure. This physical entanglement enables the material to achieve a balance between high strength and high toughness.

Benefits of technology

It achieves precise control of the Young's modulus of the material within the range of 12.98MPa to 2463.17MPa, and the toughness can reach up to 1876.35MPa, which significantly improves the structural stability and printing accuracy of the material. It is suitable for multi-functional 3D printing applications such as soft robots, biomimetic structures and flexible electronics.

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Abstract

The invention discloses a 3D printing composition based on RAFT (reversible addition-fragmentation chain transfer) and interpenetrating polymer network synergy. The 3D printing composition comprises a free radical crosslinking monomer, a diepoxy monomer, an RAFT chain transfer agent and a cationic photoinitiator, the composition is subjected to a synergistic reaction of RAFT (Reversible Addition-Fragmentation Chain Transfer) polymerization and cationic ring-opening polymerization under an illumination condition to form an interpenetrating polymer network structure. The free radical cross-linking monomer, the diepoxy monomer and the RAFT chain transfer agent in a specific ratio are selected, a synergistic reaction of RAFT polymerization and cationic ring-opening polymerization is carried out under the illumination condition, an interpenetrating polymer network structure is formed, matching of strength and toughness is achieved, high strength is achieved, meanwhile, high toughness is kept, and the requirements for high strength and high toughness are met.
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