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Preparation method, product and application of room-temperature phosphorescent hydrogel

A room temperature phosphorescence and hydrogel technology, applied in chemical instruments and methods, luminescent materials, luminescent coatings, etc., can solve problems such as fracture, phase separation, uneven luminescence, etc., achieve simple synthesis routes, improve RTP performance, and improve mechanical properties. performance effect

Pending Publication Date: 2021-10-15
LUOYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are very few reports on pure organic RTP hydrogels, most of which are physical doping of luminescent materials and hydrogels, which inevitably leads to problems such as phase separation and uneven luminescence caused by differences in material properties, and The obtained hydrogel is too brittle and will break under relatively low stress or strain, which limits the application of RTP hydrogel to a certain extent.

Method used

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  • Preparation method, product and application of room-temperature phosphorescent hydrogel
  • Preparation method, product and application of room-temperature phosphorescent hydrogel
  • Preparation method, product and application of room-temperature phosphorescent hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Step 1, add CB[8] and ABP into water at a molar ratio of 1:2, dissolve it under ultrasonic conditions at 50°C to obtain supramolecular clathrate (CB[8] / ABP) solution A; Add acrylamide to A to obtain monomer solution B; wherein, the concentration of CB[8] / ABP in solution B is 37.5 mM and the concentration of acrylamide is 5M in terms of CB[8].

[0054] Step 2. Dissolve PVA-124 in water at 90°C. After the PVA-124 is completely dissolved, let it stand at room temperature for 30 minutes to obtain solution C; the mass concentration of PVA-124 in solution C is 10%.

[0055] Step 3, dissolving phenyl (2,4,6-trimethylbenzoyl) lithium phosphate (LAP) in 0.1M, pH=9.5 borate buffer solution to prepare initiator solution D; LAP The concentration in Solution D was 86 mM.

[0056] Step 4, all the above solutions were washed with N 2 Bubble for 10 minutes to expel the oxygen in the solution, then mix solution B and solution D at a volume ratio of 2:1, and use N 2 Bubble for 10min, ...

Embodiment 2

[0070] The difference from Example 1 is that the temperature in step 1 is 40°C, the concentration of acrylamide is 4M, and the pH of the borate buffer solution in step 3 is 9.

[0071] Result: The room temperature phosphorescent hydrogel prepared in this example was tested the same as in Example 1, and the result was similar to that of Example 1. The phosphorescence lifetime of the hydrogel reached about 5.0 ms, and the phosphorescence quantum yield was about 9.0%. The tensile strength reaches 105kPa, the storage modulus G′ is 83kPa, the loss modulus G″ is 14kPa, the storage modulus G′ after self-repair is 80kPa, the loss modulus G″ is 13kPa, and it can withstand 158% deformation. And it has excellent self-repair performance, and can be prepared into a self-supporting film, which has good phosphorescent properties and self-repair behavior.

Embodiment 3

[0073] The difference from Example 1 is that the temperature in step 1 is 60°C, the concentration of acrylamide is 6.5M, and the pH of the borate buffer solution in step 3 is 10.

[0074]Result: The room temperature phosphorescence hydrogel prepared in this example was tested the same as Example 1, and the result was similar to Example 1. The phosphorescence lifetime of the hydrogel reached about 4.9ms, and the phosphorescence quantum yield was about 8.9%. The tensile strength reaches 103kPa, the storage modulus G′ is 82kPa, the loss modulus G″ is 13kPa, the storage modulus G′ after self-repair is 80kPa, the loss modulus G″ is 12kPa, and it can withstand 157% deformation. And it has excellent self-repair performance, and can be prepared into a self-supporting film, which has good phosphorescent properties and self-repair behavior.

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Abstract

The invention discloses a preparation method, a product and application of room-temperature phosphorescent hydrogel, and belongs to the technical field of room-temperature phosphorescent hydrogel. A supramolecular inclusion compound is prepared by taking cucurbituril as a main body and phosphorescent molecules as an object; and room-temperature phosphorescent hydrogel is prepared by taking the supramolecular inclusion compound and acrylamide as monomers through in-situ polymerization in a polyvinyl alcohol aqueous solution. According to the invention, PVA is used as a first network to improve the mechanical properties and film-forming ability of the hydrogel, and acrylamide and a supramolecular inclusion compound are copolymerized to construct a second network. The prepared hydrogel shows an ultra-long room temperature phosphorescence lifetime (5.1 ms), and the phosphorescence quantum yield reaches 9.05%. The tensile strength reaches 110 kPa, so that the material can be further used for preparing a self-supporting film, a new way is provided for the development of organic room-temperature phosphorescent materials, and the material has potential application value in the fields of phosphorescent coatings, biological materials and the like.

Description

technical field [0001] The invention relates to the technical field of room temperature phosphorescent hydrogel, in particular to a preparation method, product and application of room temperature phosphorescent hydrogel. Background technique [0002] Room temperature phosphorescent (RTP) materials, as a special kind of photoluminescent materials with large Stokes shift and long life, have been widely used in information encryption, advanced anti-counterfeiting, light-emitting diodes and other fields. The current strategies for preparing RTP materials mainly focus on organometallic or noble metal complexes. However, the high toxicity and high cost of organometallic or noble metal complexes restrict their practical applications. Therefore, pure organic RTP materials that are environmentally friendly and inexpensive have come into the sight of researchers and have attracted widespread attention rapidly. However, pure organic RTP materials usually have low luminous efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L51/08C08L29/04C08F283/00C08F220/56C08F2/48C09K11/02C09K11/06C09D5/22C08J5/18
CPCC08J3/075C08F283/00C08F2/48C09K11/06C09K11/025C09D5/22C08J5/18C08J2351/08C08J2429/04C08J2329/04C08J2451/08C09K2211/1466C08F220/56
Inventor 周岩李莹吉保明赵迪李子怡
Owner LUOYANG NORMAL UNIV
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