Huazhong University of Science and Technology

Hongwei Ge

Xiaolin Xie

Xingping Zhou

Haiyan Peng

Chengfu Zheng

Guannan Chen

Yonggui Liao

Zhifang Yang

Xiaomei Zhang

The present invention belongs to the field of functional materials, and particularly relates to a directly printable image recording material, a preparation method and application thereof. The image recording material comprises 25 to 78.8 parts by mass of a photopolymerizable monomer, 0.2 to 5 parts by mass of a photoinitiator, 20 to 70 parts by mass of an inert component, and 0.05 to 2 parts by mass of a thermal polymerization inhibitor, and has an initial viscosity of 200 to 800 mPa&#xb7;s. The photopolymerizable monomer includes a thiol monomer and an olefin monomer, at least one of which is a silicon-based monomer with polyhedral oligomeric silsesquioxane as a silicon core. By introducing a POSS-based thiol or olefin monomer into the photopolymerizable monomer in combination with other material components, the recording material is allowed to have an initial viscosity of 200 to 800 mPa&#xb7;s, and meanwhile, the low thermal conductivity characteristic of the POSS-based photopolymerizable monomer is utilized, so that image storage quality is ensured, continuous industrial production of the image recording material is achieved, the process cost is reduced and the production efficiency is improved.

Directly printable image recording material and preparation method thereof

The present invention provides a visible light photoinitiating system for preparing a holographic photopolymer material with high-diffraction efficiency. The photoinitiating system comprises a photosensitizer and a co-initiator, and its mechanism is that the photosensitizer transforms from ground state to excited state after absorbing photons, and then interacts with the co-initiator through transfer of electrons and protons, which produces an alkyl (or aryl) free radical R and a ketyl radical K; wherein the free radical R initiates the addition polymerization of monomers that are capable of free radical polymerization, whereas the radical K inhibits the chain propagation of the macromolecular free radicals to a certain degree due to the steric hindrance effect, and thus delays the gelation time of the photopolymerization, which helps to increase the phase separation between the polymer and the functional components. A holographic photopolymer material with high-diffraction efficiency can be obtained by employing this visible light photoinitiating system.

Visible light photoinitiating system for preparing high diffraction efficiency hologram optical polymer material

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Hubei, China

Hongwei Ge