A kind of photoinduced shape memory color changing polymer containing spiropyran and preparation method thereof

A photoinduced shape memory and spiropyran technology, applied in the field of functional polymer preparation, can solve the problems of limiting the application range of shape memory materials, limiting the scope of application, biological tissue damage, etc., and achieves shape recovery, good shape fixation rate, easy the effect of exercise

Active Publication Date: 2022-07-22
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, heat-responsive SMP is the most researched, but in some practical applications, such as biomedical materials, excessive temperature will cause irreversible damage to biological tissues, which limits the application range of shape memory materials, so thermal Stimulation is not a good way to induce
[0003] At present, the vast majority of photoinduced shape memory polymers rely on the photochemical reaction of cinnamic acid groups or azobenzenes, or through the photothermal effect of photothermal materials such as graphene oxide and gold nanoparticles to achieve photoinduced shape memory effects. In special fields, such as camouflage robots, etc., the heat generated by materials is easily captured by infrared, which limits its application range

Method used

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  • A kind of photoinduced shape memory color changing polymer containing spiropyran and preparation method thereof
  • A kind of photoinduced shape memory color changing polymer containing spiropyran and preparation method thereof
  • A kind of photoinduced shape memory color changing polymer containing spiropyran and preparation method thereof

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preparation example Construction

[0040] like figure 1 As shown, the embodiment of the present invention provides a preparation method of a spiropyran-containing photo-induced shape memory color-changing polymer, comprising the following steps:

[0041] Step S1, reacting polyether polyol or polyester polyol with diisocyanate to obtain prepolymer 1 terminated with isocyanate;

[0042] Step S2, adding a chain extender to the prepolymer 1, and carrying out a chain extension reaction to obtain a polyurethane polymer;

[0043] In step S3, the polyurethane polymer is reacted with the spiropyran to obtain a photo-induced shape memory color-changing polymer containing the spiropyran.

[0044] Preferably, the molar ratio of the polyether polyol or polyester polyol and diisocyanate in step S1 is 1:2-3, which can make the polyether polyol or polyester polyol and diisocyanate fully react to obtain isocyanate For the end-capped prepolymer 1, the raw materials are fully reacted to avoid waste of raw materials.

[0045] Pre...

Embodiment 1

[0070] like figure 2 and Image 6 As shown, the present embodiment provides a preparation method of a spiropyran-containing photoinduced shape memory color-changing polymer, comprising the following steps:

[0071] Step S1, add 10-30g polytetrahydrofuran ether diol (PTMEG) and 10-30g N,N-methyleneformamide (DMF) successively in the dry three-necked flask, then overlap the experimental device, and pass nitrogen and Condensed water, adjust the stirring speed to 250r / min. Slowly add 5-20g diphenylmethane-4,4,-diisocyanate (MDI) dropwise within 5min, add 5% dibutyltin dilaurate (DBTDL) after stirring for 15min, heat the oil bath to 50-80°C, continue The reaction is carried out for 1-2 h to obtain an isocyanate-terminated prepolymer 1, which is named PTMEG-MDI; wherein, the polytetrahydrofuran ether glycol (PTMEG) can be polytetrahydrofuran ether glycol (PTMEG-2000), polytetrahydrofuran ether glycol ( PTMEG-3000), polytetrahydrofuran ether glycol (PTMEG-4000) or polytetrahydrof...

Embodiment 2

[0075] The difference between this embodiment and Embodiment 1 is:

[0076] In step S1, diphenylmethane-4,4,-diisocyanate (MDI) can be used toluene diisocyanate (TDI), 1,6-hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), benzene Dimethylene diisocyanate (XDI), naphthalene-1,5-diisocyanate (NDI), methylcyclohexyl diisocyanate (HTDI) or dicyclohexylmethane diisocyanate (HMDI) alternatives;

[0077] In step S2, 1,4-butanediol can be replaced with 1,6-hexanediol, diethylene glycol, neopentyl glycol, sorbitol or diethylaminoethanol;

[0078] Among them, the catalyst dibutyltin dilaurate (DBTDL) can be replaced by stannous octoate, lead octoate, cobalt octoate, iron octoate, organic bismuth or organic tin.

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Abstract

The invention provides a spiropyran-containing photo-induced shape memory color-changing polymer and a preparation method thereof, belonging to the technical field of functional polymer preparation. The preparation method of the spiropyran-containing photo-induced shape memory color-changing polymer comprises the following steps: The polyether polyol or polyester polyol is reacted with diisocyanate to obtain a prepolymer 1 terminated with isocyanate; a chain extender is added to the prepolymer 1, and a chain extension reaction is carried out to obtain a polyurethane polymer; The polyurethane polymer reacts with the spiropyran to obtain the photo-induced shape memory color-changing polymer containing the spiropyran. Compared with the prior art, the spiropyran-containing photochromic polymer of the present invention has both the photoinduced shape memory effect and the photochromic effect, that is, the spiropyran-containing photochromic photochromic polymer has excellent performance. The shape fixation rate, shape recovery rate and discoloration rate can be widely used in information storage, anti-counterfeiting, flexible camouflage robots and other fields.

Description

technical field [0001] The invention relates to the technical field of functional polymer preparation, in particular to a spiropyran-containing photochromic shape memory polymer and a preparation method thereof. Background technique [0002] Shape memory polymers (SMPs) are a class of stimuli-responsive smart materials with shape memory effects. When subjected to external stimuli, such as heat, light, electricity, magnetism, chemical solvents, etc., the material can be restored from the temporary shape state to the original shape, which is widely used in aerospace, biomedicine and sensor braking and other fields. There are many kinds of shape memory polymer materials, which can be divided into thermo-induced, electro-induced, photo-induced, magneto-induced and chemically responsive types according to different stimulus responses. At present, thermally responsive SMPs are the most studied, but in practical applications in some fields, such as biomedical materials, excessive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/10C08G18/32C09K9/02
CPCC08G18/7671C08G18/4854C08G18/10C09K9/02C08G2280/00C09K2211/1475C08G18/3206C08G18/3844
Inventor 冷劲松王晓飞刘彦菊何阳
Owner HARBIN INST OF TECH
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