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A holographic photopolymer based on the click reaction of thiol olefins

A photopolymer and olefin click technology, which is applied in the field of polymer materials, can solve the problems of long gelation time, high processing cost, and low diffraction efficiency of holographic photopolymers, and achieve accelerated gelation and phase separation, and optimized phase High separation and diffraction efficiency

Active Publication Date: 2020-06-02
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a holographic photopolymer based on thiol olefin click reaction, the purpose of which is to introduce silicon-based thiol monomers into thiol monomers or olefin monomers Or silicon-based olefin monomers are used as photopolymerizable monomers, and a specific photoinitiation system is selected at the same time. Through modulus regulation, competition and synergy between photoinitiation and photoinhibition polymerization, a high diffraction efficiency and refractive index modulation degree can be obtained. High-efficiency holographic photopolymers that are insensitive to water and oxygen, thereby solving the technical problems of holographic photopolymers such as long gelation time, low diffraction efficiency, and high processing costs

Method used

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  • A holographic photopolymer based on the click reaction of thiol olefins
  • A holographic photopolymer based on the click reaction of thiol olefins
  • A holographic photopolymer based on the click reaction of thiol olefins

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A holographic photopolymer based on thiol olefin click reaction, including 67.9% photopolymerizable monomer, 0.1wt.% photosensitizer, 2wt.% co-initiator, 30wt.% liquid crystal and 0.5wt.% thermal polymerization inhibitor.

[0052] The photopolymerizable monomer is based on SiO 2 Be the thiol monomer (structure shown in formula (1), and n=4, R 1 =R 2 =R 3 =R 4 =SH), ethylene glycol bis(3-mercaptopropionate) and pentaerythritol tetraacrylate, hyperbranched acrylate 6361-100 according to the molar ratio of 1:2:1:1 mixture, the mole percentage of silicon-based monomer 20%. The photosensitizer is C1, and X 1 =X 2 =X 3 =X 4 =I,X 5 =X 6 =X 7 =X 8 =Cl, the co-initiator is a mixture of triethanolamine, acetylphenylglycine and 3-bromophenylglycine in a molar ratio of 2:2:3, wherein the mass ratio of photosensitizer to co-initiator is 1:20. The thermal polymerization inhibitor is tris(N-nitroso-N-phenylhydroxylamine) aluminum salt.

[0053] The above components were...

Embodiment 2

[0055] A holographic photopolymer based on thiol olefin click reaction, including 66.3wt.% photopolymerizable monomer, 0.6wt.% photosensitizer, 3wt.% co-initiator, 30wt.% liquid crystal and 0.1wt .% thermal polymerization inhibitor.

[0056] The photopolymerizable monomer is based on SiO 1.5 Be the thiol monomer of nucleus (structure is shown in formula (1), and n=8, R 1 =R 2 =R 3 =R 4 =R 5 =R 6 =R 7 =R 8 =C 3 h 7 SH), pentaerythritol tetrakis (3-mercaptopropionate) and triallyl isocyanurate in a molar ratio of 3:2:4, and the molar percentage of the silicon-based monomer is 33.3%. The photosensitizer is a mixture of C2 and C4 in a molar ratio of 1:1, and R 1 =R 4 =N(C 2 h 5 ) 2 , R 2 =R 3 =H, the co-initiator is a mixture of N-phenylglycine and N-ethylmaleimide in a molar ratio of 1:2, wherein the mass ratio of photosensitizer to co-initiator is 1:5. The thermal polymerization inhibitor is tris(N-nitroso-N-phenylhydroxylamine) aluminum salt.

[0057] The abo...

Embodiment 3

[0064] A holographic photopolymer based on thiol olefin click reaction, including 67.8wt.% photopolymerizable monomer, 2wt.% photosensitizer, 0.1wt.% co-initiator, 30wt.% liquid crystal and 0.1wt .% thermal polymerization inhibitor.

[0065] The photopolymerizable monomer is a thiol monomer with Si as the nucleus (the structure is shown in formula (1), and n=4, R 1 =R 2 =C 5 h 11 , R 3 =R 4 =C 2 h 4 SH), trimethylolpropane tris (3-mercaptopropionate), pentaerythritol triacrylate, and pentaerythritol triallyl ether in a molar ratio of 3:2:2:2, the molar percentage of silicon-based monomers was 33.3%. The photosensitizer is a mixture of C4 and C5 in a molar ratio of 1:1, and R 1 = Thienyl, R 2 =R 3 =H, the co-initiator is N,N,N-triethylamine, N-methylmaleimide and 2,4,6-tris(trichloromethyl)-1,3,5- The triazine is a mixture with a molar ratio of 1:2:3, wherein the mass ratio of the photosensitizer to the co-initiator is 20:1. The thermal polymerization inhibitor is ...

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Abstract

The invention belongs to the field of a high polymer material, and particularly relates to a mercaptan olefin click reaction-based holographic photopolymer with high performance. The mercaptan olefinclick reaction-based holographic photopolymer comprises a photo-initiation system, a monomer capable of light polymerization and a thermal polymerization inhibitor, wherein the monomer capable of light polymerization comprises a mercaptan monomer and an olefin monomer, the mole ratio of a mercaptan functional group and an olefin functional group in the monomer capable of light polymerization is (1:10)-(10:1), and at least one of the mercaptan functional group and the olefin functional group is a silicon-based monomer. The silicon-based mercaptan monomer or the silicon-based olefin monomer is used as the monomer capable of light polymerization, the special photo-initiation system is simultaneously matched and selected, and the holographic photopolymer with high diffraction efficiency and high refractive degree modulation degree and not sensitive to water and oxygen is obtained by modulus control and competition and cooperation of a photo initiation and light polymerization, and thus, the technical problems of long gel time, low diffraction efficiency, high processing cost and the like of the holographic photopolymer are solved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a high-performance holographic photopolymer based on thiol olefin click reaction. Background technique [0002] Holographic photopolymers are usually composed of photopolymerizable monomers, functional components (such as liquid crystals, zinc sulfide nanoparticles, silica nanoparticles, carbon nanotubes, POSS nanoparticles, etc.) Laser, data storage, biosensing and other fields have broad application prospects. Common photopolymerizable monomers include acrylates and thiol olefin systems. The polymerization of acrylate monomers is a free radical chain polymerization reaction, which is sensitive to oxygen and water, and cannot be processed in an exposed environment. The processing cost is high, and the volume shrinkage is serious, which will cause the deformation of the holographic grating. [0003] The click reaction of thiol olefins has been widely used due to its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/027G03F7/004
Inventor 彭海炎陈冠楠解孝林廖永贵周兴平葛宏伟杨志方赵骁宇
Owner HUAZHONG UNIV OF SCI & TECH
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