Mechanochromic self-healing elastic film and its preparation method and application
A color-changing and self-repairing technology, which is applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of use, low mechanical properties, and incapable membrane materials, and achieve high reaction efficiency, high activity, and fast reaction rate.
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[0038] See Figure 1 to 5 As shown, the present invention provides a method of preparation of force-to-discoloration self-repair elastic film, including the following steps:
[0039] S1, the preparation of both ends of a hydroxyl group stimulating compound screw-derivative or Rhodamin derivatives.
[0040] S2, a crosslinking agent, the end group of the crosslinking agent is a double bond, and is an amide bond in the middle and contains a helicophil derivative or a rodamine derivative. The structural formula of the crosslinking agent is as follows:
[0041]
[0042] S3, preparation force to discharmia self-repair elastic film: Take two monomers to perform free radical polymerization under the action of free radical polymerization initiator, resulting in force to discolore self-repair elastic film .
[0043] Preferably, the structural structure of the copper derivative is HO-SP1-OH, HO-SP2-OH or HO-SP3-OH, and the structure of the Luodan Ming Derivative is HO-RH-OH, and the structur...
Embodiment 1
[0062] S1, the preparation of the stimulation of hydroxyl groups of hydroxyl groups, HO-SP2-OH spare;
[0063] S2, a crosslinking agent: Dikuttimetin (DBTDL) is added to methyl methacrylate, then the organic solution containing the bishydroxy cheriff derivative prepared by step S1, at 20 to 40 ° C The reaction is 3 to 5 h, and the end group is a double bond, the intermediate is a crosslinking agent which is an amide bond and a spirobic derivative;
[0064] The preparation process of the crosslinking agent is as follows:
[0065]
[0066] S3, preparation force caused discoloration self-modified elastic film:
[0067] The hard segment monomer was taking the hard segment monomer mixed with the crosslinking agent obtained by the process obtained by step S2, and the radical polymerization initiator was added to the serial polymerization at a preset temperature for 10 h, resulting in force to discoloration self-repair Film; wherein the molar ratio of the hard segment monomer and the s...
Embodiment 2-8
[0078]Example 2-8, the difference between Comparative Example 1-2 and Example 1 is that in step S3, the molar ratio of the hard segment monomer and the soft segment monomer is changed, and other steps and embodiments 1 is basically the same, and will not be described herein; the molar ratio of the hard segment monomer and the soft segment monomer in Example 2-8 is shown in Table:
[0079] project Hard segment monomer with soft segment monomer Example 1 1:1 Example 2 1:5 Example 3 1:2 Example 4 4:5 Example 5 6:5 Example 6 3:2 Example 7 9:5 Example 8 2:1 Contrast 1 1:10 Contrast 2 5:2
[0080] According to experimentally, as the molar ratio of the hard segment monomer and the soft segment monomer increases, the mechanical properties of the force-discolored self-modified elastic film increase, and the elastic properties have decreased. It has improved the sensitivity of discoloration.
[0081] It should be noted that whe...
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