CN113433727B - Electrochromic optical film and preparation method thereof - Google Patents
Electrochromic optical film and preparation method thereof Download PDFInfo
- Publication number
- CN113433727B CN113433727B CN202110681551.9A CN202110681551A CN113433727B CN 113433727 B CN113433727 B CN 113433727B CN 202110681551 A CN202110681551 A CN 202110681551A CN 113433727 B CN113433727 B CN 113433727B
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- liquid crystal
- optical film
- electrochromic
- electrochromic optical
- crystal material
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- 239000012788 optical film Substances 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 119
- 239000000463 material Substances 0.000 claims abstract description 86
- 239000004005 microsphere Substances 0.000 claims abstract description 50
- 229920000642 polymer Polymers 0.000 claims abstract description 18
- 230000000737 periodic effect Effects 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 239000010408 film Substances 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 239000000839 emulsion Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000004530 micro-emulsion Substances 0.000 claims abstract description 5
- 239000000178 monomer Substances 0.000 claims description 43
- UWCWUCKPEYNDNV-LBPRGKRZSA-N 2,6-dimethyl-n-[[(2s)-pyrrolidin-2-yl]methyl]aniline Chemical compound CC1=CC=CC(C)=C1NC[C@H]1NCCC1 UWCWUCKPEYNDNV-LBPRGKRZSA-N 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 239000004038 photonic crystal Substances 0.000 claims description 15
- 150000005690 diesters Chemical class 0.000 claims description 14
- 239000012752 auxiliary agent Substances 0.000 claims description 13
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 6
- 239000000080 wetting agent Substances 0.000 claims description 5
- 238000001723 curing Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 21
- 230000008569 process Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 24
- -1 4- [ [6- [ (1-oxo-2-propenyl) oxy ] hexyl ] oxy ] benzoic acid 4- [ [4- [ [6- [ (1-oxo-2-propenyl) oxy ] hexyl ] oxy ] phenoxy ] carbonyl ] phenyl ester Chemical class 0.000 description 12
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 6
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- 239000003086 colorant Substances 0.000 description 4
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000002077 nanosphere Substances 0.000 description 3
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 2
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 2
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 2
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 2
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 2
- RZVINYQDSSQUKO-UHFFFAOYSA-N 2-phenoxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC1=CC=CC=C1 RZVINYQDSSQUKO-UHFFFAOYSA-N 0.000 description 2
- HMBNQNDUEFFFNZ-UHFFFAOYSA-N 4-ethenoxybutan-1-ol Chemical compound OCCCCOC=C HMBNQNDUEFFFNZ-UHFFFAOYSA-N 0.000 description 2
- LVGFPWDANALGOY-UHFFFAOYSA-N 8-methylnonyl prop-2-enoate Chemical compound CC(C)CCCCCCCOC(=O)C=C LVGFPWDANALGOY-UHFFFAOYSA-N 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 2
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 2
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 description 2
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 2
- QPJVMBTYPHYUOC-UHFFFAOYSA-N methyl benzoate Chemical compound COC(=O)C1=CC=CC=C1 QPJVMBTYPHYUOC-UHFFFAOYSA-N 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- RZFODFPMOHAYIR-UHFFFAOYSA-N oxepan-2-one;prop-2-enoic acid Chemical compound OC(=O)C=C.O=C1CCCCCO1 RZFODFPMOHAYIR-UHFFFAOYSA-N 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- WXPWZZHELZEVPO-UHFFFAOYSA-N (4-methylphenyl)-phenylmethanone Chemical compound C1=CC(C)=CC=C1C(=O)C1=CC=CC=C1 WXPWZZHELZEVPO-UHFFFAOYSA-N 0.000 description 1
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 1
- JZEXORLUKMQOFA-UHFFFAOYSA-N 2-(1-ethoxyethyl)-2-(hydroxymethyl)propane-1,3-diol prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.CCOC(C)C(CO)(CO)CO JZEXORLUKMQOFA-UHFFFAOYSA-N 0.000 description 1
- FTALTLPZDVFJSS-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl prop-2-enoate Chemical compound CCOCCOCCOC(=O)C=C FTALTLPZDVFJSS-UHFFFAOYSA-N 0.000 description 1
- YIJYFLXQHDOQGW-UHFFFAOYSA-N 2-[2,4,6-trioxo-3,5-bis(2-prop-2-enoyloxyethyl)-1,3,5-triazinan-1-yl]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCN1C(=O)N(CCOC(=O)C=C)C(=O)N(CCOC(=O)C=C)C1=O YIJYFLXQHDOQGW-UHFFFAOYSA-N 0.000 description 1
- GTELLNMUWNJXMQ-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical class OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.CCC(CO)(CO)CO GTELLNMUWNJXMQ-UHFFFAOYSA-N 0.000 description 1
- KTALPKYXQZGAEG-UHFFFAOYSA-N 2-propan-2-ylthioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(C(C)C)=CC=C3SC2=C1 KTALPKYXQZGAEG-UHFFFAOYSA-N 0.000 description 1
- UZGCTULFQVGVNS-UHFFFAOYSA-N 4-(4-prop-2-enoyloxybutoxycarbonyloxy)benzoic acid Chemical compound OC(=O)C1=CC=C(OC(=O)OCCCCOC(=O)C=C)C=C1 UZGCTULFQVGVNS-UHFFFAOYSA-N 0.000 description 1
- FLPSQLAEXYKMGQ-UHFFFAOYSA-N 4-(6-prop-2-enoyloxyhexoxy)benzoic acid Chemical group OC(=O)C1=CC=C(OCCCCCCOC(=O)C=C)C=C1 FLPSQLAEXYKMGQ-UHFFFAOYSA-N 0.000 description 1
- UGVRJVHOJNYEHR-UHFFFAOYSA-N 4-chlorobenzophenone Chemical compound C1=CC(Cl)=CC=C1C(=O)C1=CC=CC=C1 UGVRJVHOJNYEHR-UHFFFAOYSA-N 0.000 description 1
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- PONXUVXMHVOCEC-ZKCHVHJHSA-N OC(=O)[C@H]1CC[C@H](C=C)CC1 Chemical compound OC(=O)[C@H]1CC[C@H](C=C)CC1 PONXUVXMHVOCEC-ZKCHVHJHSA-N 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- XLXOGJYARRBRPZ-UHFFFAOYSA-N [2,3-di(prop-2-enoyloxy)-3-propoxypropyl] prop-2-enoate Chemical compound CCCOC(OC(=O)C=C)C(OC(=O)C=C)COC(=O)C=C XLXOGJYARRBRPZ-UHFFFAOYSA-N 0.000 description 1
- NLGINBDFXRCWQW-UHFFFAOYSA-N [3-methyl-4-[4-(4-prop-2-enoyloxybutoxy)benzoyl]oxyphenyl] 4-(4-prop-2-enoyloxybutoxy)benzoate Chemical compound C=1C=C(OC(=O)C=2C=CC(OCCCCOC(=O)C=C)=CC=2)C(C)=CC=1OC(=O)C1=CC=C(OCCCCOC(=O)C=C)C=C1 NLGINBDFXRCWQW-UHFFFAOYSA-N 0.000 description 1
- GUCYFKSBFREPBC-UHFFFAOYSA-N [phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C(=O)C1=C(C)C=C(C)C=C1C GUCYFKSBFREPBC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- UDHMTPILEWBIQI-UHFFFAOYSA-N butyl naphthalene-1-sulfonate;sodium Chemical compound [Na].C1=CC=C2C(S(=O)(=O)OCCCC)=CC=CC2=C1 UDHMTPILEWBIQI-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- MZRQZJOUYWKDNH-UHFFFAOYSA-N diphenylphosphoryl-(2,3,4-trimethylphenyl)methanone Chemical compound CC1=C(C)C(C)=CC=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 MZRQZJOUYWKDNH-UHFFFAOYSA-N 0.000 description 1
- 229960000878 docusate sodium Drugs 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- JZMPIUODFXBXSC-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C=C.CCOC(N)=O JZMPIUODFXBXSC-UHFFFAOYSA-N 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003707 hexyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 239000005340 laminated glass Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 229940095102 methyl benzoate Drugs 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- FZUGPQWGEGAKET-UHFFFAOYSA-N parbenate Chemical compound CCOC(=O)C1=CC=C(N(C)C)C=C1 FZUGPQWGEGAKET-UHFFFAOYSA-N 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 238000005316 response function Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical compound [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- XQCHMGAOAWZUPI-UHFFFAOYSA-M sodium;butane-1-sulfonate Chemical compound [Na+].CCCCS([O-])(=O)=O XQCHMGAOAWZUPI-UHFFFAOYSA-M 0.000 description 1
- ROBLTDOHDSGGDT-UHFFFAOYSA-M sodium;pentane-1-sulfonate Chemical compound [Na+].CCCCCS([O-])(=O)=O ROBLTDOHDSGGDT-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000016776 visual perception Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/1514—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
- G02F1/1516—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material comprising organic material
- G02F1/15165—Polymers
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention provides an electrochromic optical film and a preparation method thereof, the optical film comprises a liquid crystal periodic array formed by taking nano microspheres as structural elements, liquid crystal materials in the liquid crystal periodic array are positioned among the nano microspheres in a disperse phase, and the liquid crystal materials form a continuous phase in the electrochromic optical film, and the preparation method comprises the following steps: a. preparing polymer nano microsphere emulsion; b. preparing a liquid crystal material; c. mixing the polymer nano microemulsion with a liquid crystal material according to a proportion to obtain a mixed coating liquid; d. coating the mixed coating liquid between the upper and lower layers of the substrate I TO TO obtain a composite film material; e. vibrating and shearing the composite film material to obtain an uncured optical film; f. the uncured optical film is subjected to ultraviolet curing to obtain the optical film, and by adopting the scheme, the coupling of the color change of the liquid crystal material and two effects caused by the structural color change is realized, so that the optical film presents more different dynamic color development processes.
Description
Technical Field
The invention relates to the field of optical functional materials, in particular to an electrochromic optical film and a preparation method thereof.
Background
The photonic crystal is a photonic band gap formed by periodically and orderly arranging dielectric materials with different dielectric constants or refractive indexes, the color development principle of the photonic crystal film is that light rays are subjected to Bragg diffraction modulation of a periodic structure, the light rays have a selective modulation effect on the propagation of light with specific directions and wavelengths, and the corresponding structural color can be obtained by reflecting, refracting and diffracting the light of the photonic crystal. Most of the existing photonic crystal materials belong to static materials, have no response function under the conditions of sound, light, heat, magnetism and the like, and the periodic structure characteristics of the photonic crystal can have different extension responses to the angle of incident light and the observation angle, so that the change of different colors of the photonic crystal can be observed along with the difference of the observation angle, but the existing photonic crystal thin film can only display the colors which can be displayed by the photonic crystal thin film, and cannot further display richer colors.
Polymer Dispersed Liquid Crystal (PDLC) is an electrochromic material in existence, and PDLC usually contains liquid crystal, polymer and spacers, the spacers are usually micron-sized microspheres and are distributed disorderly in PDLC system, and the liquid crystal is usually dispersed disorderly in the solidified polymer as micron-sized droplets. Because the liquid crystal is an optical and dielectric anisotropic material, liquid crystal molecules can change an orientation mode under the action of an electric field, so that the refractive index is changed, and the light transmittance or the color of the PDLC is changed. However, the existing PDLC material can not generate structural color, and the difference of the electric field response speed of liquid crystal at different positions is large.
Disclosure of Invention
The first purpose of the invention is to provide an electrochromic optical film which can generate structural color under the regulation and control of an electric field.
The second purpose of the invention is to provide a preparation method of the electrochromic optical film.
In order to achieve the first object, the invention provides a liquid crystal periodic array formed by nano microspheres as structural elements, wherein a liquid crystal material in the liquid crystal periodic array is positioned between the nano microspheres in a dispersed phase, and the liquid crystal material forms a continuous phase in an electrochromic optical film.
According to the scheme, in the periodic array, the nano microspheres are used as a disperse phase, the liquid crystal is used as a continuous phase, the nano microsphere array is used as a structural element and is arranged in a three-dimensional ordered manner, the liquid crystal is positioned between the nano microspheres and has a photonic crystal array structure complementary with the nano microspheres, and due to the domain limiting effect of the nano microspheres, compared with the traditional bulk liquid crystal, the liquid crystal material positioned on the outer surfaces of the nano microspheres also forms a periodic structure, so that the periodic structure has more continuous and uniform phase size, the liquid crystal color change consistency is good, and the liquid crystal in a spacing area is less, so that the response to voltage is quicker and more efficient; under the action of voltage, the structured liquid crystal changes the orientation mode, so that the refractive index difference between the liquid crystal of a connecting phase and the nano-microspheres of a dispersed phase is changed, and the structural color change based on electricity is realized; the coupling of two effects of the color change of the photonic crystal liquid crystal material and the color change of the structural color caused by the change of the refractive index difference value obtains a brand new color completely different from the structural color of the non-electric response nano microsphere array and the change of the brand new color, further enlarges the rich degree of the color change of the optical film, enables the optical film to present more different dynamic color development processes, and further improves the application performance of the electrochromic optical film.
In a further aspect, the liquid crystal material is a cholesteric liquid crystal material.
Therefore, the cholesteric liquid crystal has a periodic spiral structure, has optical characteristics such as selective reflection and optical rotation, and can be used for widening the absorption wavelength range of the cholesteric liquid crystal and enriching the colors under the action of different chiral molecules.
The liquid crystal molecules in the cholesteric liquid crystal material are in a spiral shape, and the liquid crystal molecules form a cross-linking structure through photopolymerization to wrap the outer surface of the nano microsphere.
The cholesteric liquid crystal material further comprises a diester liquid crystal monomer, a monoester liquid crystal monomer, a chiral agent and a first photoinitiator.
Therefore, the use of the single-functional-group liquid crystal monomer and the double-functional-group liquid crystal monomer is beneficial to improving the controllability of the liquid crystal system.
According to a further scheme, the cholesteric liquid crystal material comprises, by mass, 5% -95% of a diester liquid crystal monomer, 5% -45% of a monoester liquid crystal monomer, 5% -20% of a chiral agent and 2% -5% of a first photoinitiator.
The further proposal is that the nano microspheres in the liquid crystal periodic array are arranged in a three-dimensional order, and the particle size of the nano microspheres is 200 nm-500 nm.
Therefore, the particle size of the nano-microspheres influences the difference between the refractive indexes of the liquid crystal of the connecting phase and the nano-microspheres of the dispersed phase, so that the final color presented by the optical film and the color change process are influenced.
The electrochromic optical film further comprises a resin auxiliary agent, and the mass percentage of the electrochromic optical film is that the ratio of each 100 g of nano microspheres to the liquid crystal material to the resin auxiliary agent is (100.
Therefore, the resin auxiliary agent is used for enabling a coating liquid system formed by the nano microsphere emulsion and the liquid crystal material to be more stable, the film is formed more uniformly, and the mechanical strength of the film after film formation is better.
According to the further scheme, the resin auxiliary agent comprises, by mass, 10% -50% of a low-molecular-weight polymer, 30% -45% of a polyfunctional group monomer, 15% -25% of a monofunctional group monomer, 1% -5% of a wetting agent, 0.5% -2% of a leveling agent and 1% -10% of a second photoinitiator.
In order to achieve the second object, the electrochromic optical film prepared by the preparation method of the electrochromic optical film provided by the invention comprises the following steps:
the preparation method comprises the following steps:
a. preparing polymer nano microsphere emulsion;
b. preparing a liquid crystal material;
c. mixing the polymer nano microemulsion with a liquid crystal material according to a proportion to obtain a mixed coating liquid;
d. c, coating the mixed coating liquid obtained in the step c between an upper layer of ITO base material and a lower layer of ITO base material to obtain a composite membrane material;
e. vibrating and shearing the composite film material to obtain an uncured optical film;
f. and e, curing the uncured optical film obtained in the step e by ultraviolet light to obtain the optical film.
The further scheme is that the preparation steps of the liquid crystal material are as follows: weighing the diester liquid crystal monomer, the monoester liquid crystal monomer, the chiral agent and the first photoinitiator according to the proportion, and mixing under the condition of slowly stirring at room temperature.
Detailed Description
The electrochromic optical film can be applied to scenes such as consumer electronics, automobiles, buildings and the like, and the photonic crystal film is applied to laminated glass, so that controllable visual perception and excellent customer experience are brought; the liquid crystal material is structured under the interval action of the nano microspheres, after the liquid crystal material is electrified, the arrangement state of the structured liquid crystal molecules is changed to show color change, meanwhile, the refractive index difference value between the nano microspheres of the disperse phase and the liquid crystal material of the continuous phase is changed, so that the photonic crystal shows color change of another dimension, and the coupling of the color change and the color change of the liquid crystal enables the visual effect of the optical film to be richer.
The electrochromic optical film comprises a liquid crystal periodic array formed by taking nano microspheres as structural elements, wherein a liquid crystal material is positioned between the nano microspheres of a dispersed phase, the liquid crystal material forms a continuous phase in the film, and the nano microspheres in the periodic array of the film can be arranged in a three-dimensional order. When the electrochromic optical film is electrified, the arrangement mode of liquid crystal molecules is changed, the maximum reflection peak of the liquid crystal material is changed, the maximum reflection peak of the photonic crystal structure is changed, the maximum absorption peak of the optical film is changed after the two optical films are superposed, and the synergistic electrochromic effect is achieved. The liquid crystal material is cholesteric liquid crystal, and the cholesteric liquid crystal has a periodic spiral structure and has optical characteristics of selective reflection, optical rotation and the like. The liquid crystal material comprises a diester liquid crystal monomer, a monoester monomer, a chiral agent and a first photoinitiator, wherein double bonds are arranged at the tail ends of branched chains on the liquid crystal material, a network structure is formed through photopolymerization, and the liquid crystal material is arranged on the outer surface of the nano microspheres, so that the liquid crystal material which is orderly arranged is structured through a nano microsphere array, the liquid crystal material is more sensitive, and the action effect is better. According to the mass percentage, the liquid crystal material comprises 5-95% of diester liquid crystal monomer, 5-45% of monoester liquid crystal monomer, 5-20% of chiral agent and 2-5% of first photoinitiator. Optimally, according to the mass percentage, 10-50% of diester liquid crystal monomer, 10-25% of monoester liquid crystal monomer, 10-15% of chiral agent and 3-4% of first photoinitiator, and further optimally, the liquid crystal material comprises 75% of diester liquid crystal monomer, 12% of monoester liquid crystal monomer, 10% of chiral agent and 5% of first photoinitiator. The diester-type liquid crystal monomer may be at least one of 4- [ [6- [ (1-oxo-2-propenyl) oxy ] hexyl ] oxy ] benzoic acid 4- [ [4- [ [6- [ (1-oxo-2-propenyl) oxy ] hexyl ] oxy ] phenoxy ] carbonyl ] phenyl ester, bis [4- [ [6- (acryloyloxy) hexyl ] oxy ] benzoic acid ] (2-methyl-1, 4-phenylene) ester, 2-methyl-1, 4-phenylenebis (4- (4- (acryloyloxy) butoxy) benzoate), (4- (((4- (acryloyloxy) butoxy) carbonyl) oxy) benzoic acid 2-methyl-1, 4-diphenol ester, the monoester liquid crystal monomer can be 4- (6- (acryloyloxy) hexyloxy) benzoic acid, 4-propyl-4 '-ethylene dicyclohexyl, pentyldicyclohexyl ethylene, propyldicyclohexyl ethylene, 1-pentyl-4- (4' -ethylene dicyclohexyl) benzene, trans-4-vinyl cyclohexyl formic acid, 1-pentyl-4- (trans-4-vinyl cyclohexyl) benzene, 1-propyl-4- (trans-4-vinyl cyclohexyl) benzene, methyl ethyl phenyl, the chiral agent can be at least one of bis 4- (4 '-pentylcyclohexylbenzoic acid) - (1R) -1-phenyl-1, 2-ethanediol ester, 4- (hexyloxy) -benzoic acid 4- [ [ [ (1R) -1-methylheptyl ] oxy ] carbonyl ] phenyl ester, bis 4- (4' -pentylcyclohexylbenzoic acid) - (1S) -1-phenyl-1, 2-ethanediol ester, or 4- [4- (hexyloxy) benzoyloxybenzenestrabenzoic acid (S) -2-octyl ester, the first photoinitiator can be at least one of 4-chlorobenzophenone, 4-methylbenzophenone, tetraethyl miethoketone, isooctyl p-dimethylaminoate, ethyl 4-dimethylaminobenzoate, benzoin dimethyl ether, propylene carbonate, methyl benzoate, 2-carbamoylbenzyl 2-amino benzyl 2-methyl-1- (4-dimethylphenyl) morpholine.
The electrochromic optical film also comprises a resin auxiliary agent, wherein the resin auxiliary agent comprises, by mass, 10-50% of a low-molecular weight polymer, 30-45% of a multifunctional monomer, 15-25% of a monofunctional monomer, 1-5% of a wetting agent, 0.5-2% of a leveling agent and 1-10% of a second photoinitiator, and further optimally, the resin auxiliary agent can comprise 30% of the low-molecular weight polymer, 40% of the multifunctional monomer, 25% of the monofunctional monomer, 2% of the wetting agent, 1% of the leveling agent and 5% of the second photoinitiator. The low molecular weight polymer may be at least one of urethane acrylate, urethane diacrylate; the polyfunctional monomer is a polymer monomer containing three or more active groups participating in the photocuring reaction in each molecule, and can be at least one of trimethylolpropane triacrylate (TMPTA), trimethylolpropane trimethacrylate (TMPTMA), ethoxylated trimethylolpropane triacrylate, 3 (ethoxy) trimethylolpropane triacrylate [ TMP (EO) 3TA ], pentaerythritol triacrylate (PETA), 3 (propoxy) glycerol triacrylate (GPTA), and tris (2-hydroxyethyl) isocyanurate triacrylate (THEIPTA), the monofunctional monomer may be at least one of Lauryl Acrylate (LA), butyl Acrylate (BA), isodecyl acrylate (IDA), isooctyl acrylate (2-EHA), ethoxyethoxyethyl acrylate, hydroxyethyl acrylate (HEA), hydroxyethyl methacrylate (HEMA), caprolactone Acrylate (CA), 2-phenoxyethyl acrylate (PHEA), isobornyl acrylate (IBOA), and 4-hydroxybutyl vinyl ether (HBVE), the wetting agent may be at least one of dioctyl sulfosuccinate, polyoxyethylene nonylphenol, sodium dialkylbenzenesulfonate, sodium pentanesulfonate, sodium dodecylbenzenesulfonate, sodium butylnaphthalenesulfonate, and sodium 1-butanesulfonate, the leveling agent may be at least one of polydimethylsiloxane, acrylic resin, urea-formaldehyde resin, and melamine-formaldehyde resin, and the second photoinitiator may be 2, 2-dimethoxy-2-phenylacetophenone (DOA), 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide, 1-hydroxycyclohexylphenylketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide, 2-hydroxy-methylphenylpropane-1-one, 1-hydroxycyclohexylphenylketone, 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinylbenzylphenyl) butanone, 2-isopropylthioxanthone.
The preparation method of the electrochromic optical film comprises the following steps
a. Preparing polymer nano microsphere emulsion;
b. the liquid crystal material is prepared by the following specific steps: weighing the diester liquid crystal monomer, the monoester liquid crystal monomer, the chiral agent and the first photoinitiator according to the proportion, and mixing under the conditions of room temperature and 150rpm and slowly stirring for 2 hours;
c. mixing the polymer nano microemulsion, the liquid crystal material and the resin auxiliary agent according to the proportion to obtain a mixed solution;
d. c, coating the mixed solution obtained in the step c between an upper layer of ITO substrate and a lower layer of ITO substrate to obtain a composite membrane material with a sandwich structure;
e. after the composite membrane material is vibrated, sheared and regulated, an uncured optical thin film is obtained;
f. and (3) curing the uncured optical film by ultraviolet light to obtain the optical film.
In step c, the ratio of each 100 g of the nano-microsphere to the liquid crystal material to the resin additive is (100: 100:10.
the present invention will be described in more detail with reference to examples below in order to more clearly understand the present invention.
Example 1
The electrochromic optical film in example 1 was prepared by the following steps:
the preparation method comprises the following steps:
a. preparing the polymer nano microsphere emulsion with the solid content of 50 percent: the nano-microspheres with the particle size of 250nm can be obtained by referring to the specific mode of the nano-microspheres disclosed in the step (1) of preparing the nano-microspheres in the embodiment 1 of the Chinese patent application CN 105949379A; in the embodiment, however, demulsification and drying are not carried out, and the nano microsphere emulsion is directly obtained;
b. preparing a liquid crystal material: mixing diester liquid crystal monomers (CAS number: 292865-90-8), monoester liquid crystal monomers (CAS number: 104357-57-5), chiral agent R1011 (CAS number: 154102-21-3) and first photoinitiator according to a proportion, and mixing under the conditions of room temperature and 150rpm and slowly stirring for 2 hours to obtain a liquid crystal material; the diester liquid crystal monomer, the monoester liquid crystal monomer and the chiral agent can be directly purchased from the market, for example, the diester liquid crystal monomer, the monoester liquid crystal monomer and the chiral agent are purchased through a website Chemical Book according to the CAS number;
c. weighing 100 parts of polymer nano microemulsion, 100 parts of liquid crystal material and 10 parts of resin auxiliary agent according to the mass ratio, and mixing to obtain a mixed coating liquid;
d. c, coating the mixed solution obtained in the step c between an upper layer of ITO base material and a lower layer of ITO base material to obtain a composite membrane material;
e. after the composite membrane material is vibrated, sheared and regulated, an uncured optical thin film is obtained;
f. and the optical film is obtained after ultraviolet light curing.
The photonic crystal thin film in example 1 was electrified and applied with a voltage of 3V.
Example 2
The preparation method of the electrochromic optical film in the embodiment 2 is basically the same as that of the electrochromic optical film in the embodiment 1, and the embodiment 2 is different from the embodiment 1 in that: in the process of preparing a liquid crystal material, a chiral agent is changed from R1011 to S1011 (CAS number: 165660-09-3).
Example 3
The preparation method of the electrochromic optical film in example 3 is substantially the same as that of the electrochromic optical film in example 1, and example 3 is different from example 1 in that: the magnitude of the voltage applied to the electrochromic optical film of example 3 was 1V.
Example 4
The preparation method of the electrochromic optical film in example 4 is substantially the same as that of the electrochromic optical film in example 1, and example 4 is different from example 1 in that: the magnitude of the voltage applied to the electrochromic optical film of example 4 was 5V.
Example 5
The preparation method of the electrochromic optical film in example 5 is substantially the same as that of the electrochromic optical film in example 1, and example 5 is different from example 1 in that: the content of the chiral agent in the liquid crystal material is different, and the content of the chiral agent in the liquid crystal material is 10% by mass percent.
Example 6
The preparation method of the electrochromic optical film in example 6 is substantially the same as that of the electrochromic optical film in example 1, and example 6 is different from example 1 in that: in step c, the ratio of the nano microsphere emulsion to the liquid crystal material is as follows: 100:50.
Example 7
The preparation method of the electrochromic optical film in example 7 is substantially the same as that of the electrochromic optical film in example 1, and example 7 is different from example 1 in that: the particle size of the nanospheres in example 1 was 300nm.
Comparative example 1
The electrochromic optical film of comparative example 1 was prepared in substantially the same manner as the electrochromic optical film of example 1, and comparative example 1 was different from example 1 in that: step b is not performed in comparative example 1, and the liquid crystal material is not added in step c, so that the electrochromic optical film finally obtained in comparative example 1 does not contain the liquid crystal material.
Comparative example 2
In the preparation process of the electrochromic optical film in the comparative example 2, the liquid crystal material obtained in the step b is mixed with the resin auxiliary agent according to the step c, but the nano microsphere emulsion is not added, then the coating liquid containing the liquid crystal material and the resin auxiliary agent is sequentially subjected to the step d, the step e and the step f, and the electrochromic optical film finally obtained in the comparative example 2 does not contain a nano microsphere array, so that liquid crystal molecules cannot be structured.
Comparative example 3
The electrochromic optical film of comparative example 3 was prepared in substantially the same manner as the electrochromic optical film of example 1, and comparative example 3 was different from example 1 in that: in comparative example 3, step c was not performed, so that the nanoparticle array was not subjected to the alignment treatment.
Comparative example 4
The electrochromic optical film of comparative example 4 was prepared in substantially the same manner as the electrochromic optical film of example 1, and comparative example 4 was different from example 1 in that: step a is not performed, and the liquid crystal material, the viologen compound and the resin auxiliary agent are mixed in step c to obtain a coating liquid, and step d, step e and step f are performed in sequence.
The above examples and comparative examples were tested with respect to the change in the position of the reflection peak, the color of the film observed with naked eyes, and the response time, respectively, and the results are shown in Table 1.
TABLE 1
It can be known from table 1 that the position of the reflection peak of the electrochromic optical film can be adjusted by the type and size change of the chiral agent, the particle size of the nanospheres, the ratio between the nanosphere emulsion and the liquid crystal material, and the applied voltage, so as to obtain different dynamic color change processes, which can satisfy different requirements of customers on the color presented, and when the applied voltage is larger, the response time of the electrochromic optical film is faster. In the comparative example 1, the electrochromic optical film does not contain a liquid crystal material, and the nano microsphere array performs Bragg diffraction, so that the film presents a single color, is not a dynamic change process of the color, and does not have electric correspondence. In comparative example 2, only the liquid crystal material is used, and in comparative example 3, the nanoparticle array in the film is not regulated, so that the liquid crystal materials in comparative example 2 and comparative example 3 cannot be structured and cannot show color. In the electrochromic optical film in comparative example 4, the electrochromic material is a viologen compound, the color transition of the electrochromic optical film in comparative example 4 is rapidly attenuated to 20% of the original color transition under the action of 100 times of electric field, and the electrochromic optical film in comparative example 4 is more prone to fatigue than the electrochromic optical film in example 1. In conclusion, the liquid crystal material is structured by forming a cross-linked structure to wrap the liquid crystal material outside the nano microspheres, so that a dynamic color change process is obtained, the color adjustable range is wider, and the durability of the optical film is stronger.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, not limitations, and various changes and modifications may be made by those skilled in the art, without departing from the spirit and scope of the invention, and any changes, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be embraced therein.
Claims (10)
1. An electrochromic optical film characterized in that: the liquid crystal electrochromic optical film comprises a liquid crystal periodic array formed by taking nano microspheres as structural elements, wherein a liquid crystal material in the liquid crystal periodic array is positioned between the nano microspheres in a dispersion phase, the liquid crystal material forms a continuous phase in the electrochromic optical film, the nano microspheres in the periodic array of the film electrochromic optical film are arranged in a three-dimensional order, liquid crystal is positioned between the nano microspheres and presents a photonic crystal array structure complementary with the nano microspheres, and liquid crystal molecules form a cross-linked structure through photopolymerization to wrap the outer surfaces of the nano microspheres.
2. The electrochromic optical film of claim 1, wherein:
the liquid crystal material is a cholesteric liquid crystal material.
3. The electrochromic optical film of claim 2, wherein:
the cholesteric liquid crystal material has liquid crystal molecules in a spiral shape.
4. The electrochromic optical film of claim 2, wherein:
the cholesteric liquid crystal material comprises a diester liquid crystal monomer, a monoester liquid crystal monomer, a chiral agent and a first photoinitiator.
5. The electrochromic optical film of claim 4, wherein:
according to the mass percentage, the cholesteric liquid crystal material comprises 5% -95% of diester liquid crystal monomers, 5% -45% of monoester liquid crystal monomers, 5% -20% of chiral agents and 2% -5% of first photoinitiators.
6. The electrochromic optical film of claim 1, wherein:
the particle size of the nano-microsphere is 200 nm-500 nm.
7. The electrochromic optical film according to any one of claims 1 to 6, wherein:
the electrochromic optical film also comprises a resin additive, wherein the mass percentage of the resin additive to each 100 g of nano microspheres is (100.
8. The electrochromic optical film of claim 7, wherein:
according to the mass percentage, the resin auxiliary agent comprises 10-50% of low molecular weight polymer, 30-45% of polyfunctional group monomer, 15-25% of monofunctional group monomer, 1-5% of wetting agent, 0.5-2% of flatting agent and 1-10% of second photoinitiator.
9. The preparation method of the electrochromic optical film is characterized by comprising the following steps: the preparation method is used for preparing the electrochromic optical film of any one of 1 to 8;
the preparation method comprises the following steps:
a. preparing polymer nano microsphere emulsion;
b. preparing a liquid crystal material;
c. mixing the polymer nano microemulsion with the liquid crystal material according to a ratio to obtain a mixed coating liquid;
d. c, coating the mixed coating liquid obtained in the step c between an upper layer of ITO base material and a lower layer of ITO base material to obtain a composite membrane material;
e. after the composite membrane material is vibrated, sheared and regulated, an uncured optical thin film is obtained;
f. and e, curing the uncured optical film obtained in the step e by ultraviolet light to obtain the optical film.
10. The method for preparing an electrochromic optical film according to claim 9, characterized in that:
the preparation steps of the liquid crystal material are as follows: weighing the diester liquid crystal monomer, the monoester liquid crystal monomer, the chiral agent and the first photoinitiator in proportion, and mixing under the condition of slowly stirring at room temperature.
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