Shape memory liquid crystal elastomer material with dynamically adjustable and controllable surface appearance and preparation method of shape memory liquid crystal elastomer material
A liquid crystal elastomer and surface morphology technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems affecting the application of liquid crystal elastomer materials, the surface microstructure cannot be dynamically adjusted, etc., and achieve excellent thermal response performance, easy The effect of simple operation and steps
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[0029] In the present invention, the preparation method of the 4-(5-hexenyloxy)phenyl-4-(5-hexenyloxy)benzoate comprises the following steps:
[0030] Mix hydroquinone p-hydroxybenzoate, 6-bromo-1-hexene, anhydrous potassium carbonate, potassium iodide and organic solvent for nucleophilic substitution reaction to obtain 4-(5-hexenyloxy)phenyl -4-(5-Hexenyloxy)benzoate.
[0031] In the present invention, the mass ratio of the hydroquinone p-hydroxybenzoate and 6-bromo-1-hexene is preferably 20 to 25:50, more preferably 24:50; The mass ratio of diphenol ester, anhydrous potassium carbonate and potassium iodide is preferably 20-25:40-50:0.5-2, more preferably 24:50:1; the organic solvent is preferably N,N-dimethyl Formamide, the mass ratio of hydroquinone p-hydroxybenzoate and organic solvent is preferably 30-40:1000, more preferably 35:1000.
[0032] In the present invention, the nucleophilic substitution reaction is preferably carried out at room temperature, and the time of ...
Embodiment 1
[0049] 50 parts of 4-(5-hexenyloxy)phenyl-4-(5-hexenyloxy)benzoate, 50 parts of pentaerythritol tetra-3-mercaptoacrylate and 1 part of light The initiator phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide was dissolved in 200 parts of ethyl acetate, stirred evenly, and then ultrasonically treated for 3 minutes to fully dissolve and mix.
[0050] The uniformly mixed solution was cured by irradiating ultraviolet light with a wavelength of 365nm for 30s, and the light-cured material was placed in an oven at 80°C to remove the solvent for 4 hours, and a shape-memory liquid crystal elastomer material with dynamically adjustable surface morphology was obtained.
Embodiment 2
[0052] 50 parts of 4-(5-hexenyloxy)phenyl-4-(5-hexenyloxy)benzoate, 30 parts of pentaerythritol tetra-3-mercaptoacrylate, 20 parts of 3 , 6-dioxa-1,8-octanedithiol and 1 part of photoinitiator phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide dissolved in 200 parts of ethyl acetate , stirred and mixed evenly, and then ultrasonicated for 3 minutes to fully dissolve and mix.
[0053] The uniformly mixed solution was cured by irradiating ultraviolet light with a wavelength of 365nm for 30s, and the light-cured material was placed in an oven at 80°C to remove the solvent for 4 hours, and a shape-memory liquid crystal elastomer material with dynamically adjustable surface morphology was obtained.
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