A kind of polymer stabilized blue phase liquid crystal composition and preparation method thereof
A blue-phase liquid crystal and polymer technology, applied in liquid crystal materials, organic chemical methods, chemical instruments and methods, etc., can solve the problems that limit the application of blue-phase liquid crystals
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Embodiment 1
[0101] Example 1, preparation of dextrorotatory compounds shown in formula VIII (n=2, R=C 3 h 7 )
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[0104] Synthesis of 4-(5-propylpyrimidin-2-yl)benzoyl chloride
[0105]Add 4.84 g (20 mmol) of 4-(5-propylpyrimidin-2-yl)benzoic acid, 60 mL of thionyl chloride, and 50 mL of benzene , a few drops of N,N-dimethylformamide (DMF), refluxed for 4 hours, and the solvent was removed by rotary evaporation to obtain a brown liquid product, which was directly fed for the next reaction.
[0106] (3S, 3aR, 6R, 6aR)-6-((4-(5-propylpyrimidin-2-yl)benzoyl)oxy)hexahydrofuro[3,2-b]furan-3-yl 4 Synthesis of '-Propyl-[1,1'-biphenyl]-4-carboxylate
[0107] In a 250mL three-necked flask equipped with a drying tube, a reflux condenser, a thermometer and a magnetic stirrer, 2.60 grams (10 mmol) of 4-(5-propylpyrimidin-2-yl) benzoyl chloride and 1.46 grams of isosorbide ( 10mmol) and 150mL of methylene chloride, the reaction temperature was maintained at 0 to 5°C in an ic...
Embodiment 2
[0109] Mixed liquid crystal material I-1 consists of 25% a component (R 1 =C 3 h 7 ), 25% b component (R 1 =C 3 h 7 ), 15% c component (R 1 =C 3 h 7 ), 10% of the d component (R 1 =C 3 h 7 ), 10% e component (R 1 =C 3 h 7 ), 5% of the f component (R 1 =C 3 h 7 ), 10% of the g component (R 1 =C 3 h 7 ), heated and melted by means of electromagnetic stirring at 100-120°C for 1-2 hours and mixed to form.
[0110] Mix the mixed liquid crystal material I-1 obtained above with a mass ratio of 60%, chiral liquid crystal material II-1 (composed according to the mass ratio of h component 50%, i component 50%) 30% mass ratio, polymer Monomer III-1 (composed according to the mass ratio of j component 50%, k component 20%, and m component 30%) has a mass ratio of 10% to form a system with a total mass of 100%, and then according to the mass ratio of 0.01% Add photoinitiator IV. Heating to isotropy by means of electromagnetic stirring to make it evenly mixed; then, pou...
Embodiment 3
[0112] Mixed liquid crystal material I-2 consists of 20% a component (R 1 =C 3 h 7 ), 20% b component (R 1 =C 3 h 7 ), 15% c component (R 1 =C 3 h 7 ), 15% of the d component (R 1 =C 3 h 7 ), 10% e component (R 1 =C 3 h 7 ), 10% f component (R 1 =C 3 h 7 ), 10% of the g component (R 1 =C 3 h 7 ) is formed by heating and melting at 100-120° C. with electromagnetic stirring for 1-2 hours.
[0113] Mix the mixed liquid crystal material I-2 obtained above with a mass ratio of 60%, chiral liquid crystal material II-2 (composed according to the mass ratio of h component 60%, i component 40%) 30% mass ratio, polymer Monomer III-2 (composed according to the mass ratio of 60% of j component, 10% of k component, and 30% of m component) has a mass ratio of 10% to form a system with a total mass of 100%, and then according to the ratio of 0.01% of the mass Add photoinitiator IV. Heating to isotropy by means of electromagnetic stirring to make it evenly mixed; then, po...
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