Novel approaches to flexible visible transparent hybrid films for ultraviolet protection

Calvo, Mauricio E.; Smirnov, José R. Castro; Míguez, Hernán

doi:10.1002/polb.23087

Cited by 114 publications

(83 citation statements)

References 71 publications

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“…In comparison with other UV-protection candidates, ZnO is advantageous, due to its protection over long periods, broadband protection, and nonwhitening of skin. 17 The use of materials with UV-protection properties is typically based on optical scattering and/or absorption. 18 On the other hand, the UV-blocking ability of nanoscale ZnO also depends on its size and morphology.…”

Section: Introductionmentioning

confidence: 99%

Impact of nanostructured thin ZnO film in ultraviolet protection

Ghamsari

Alamdari

Han

et al. 2016

IJN

101

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Section: Introductionmentioning

confidence: 99%

Impact of nanostructured thin ZnO film in ultraviolet protection

Ghamsari

Alamdari

Han

et al. 2016

IJN

101

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“…[11][12][13][14] Organic-inorganic hybrid materials are fast-growing materials that may exhibit novel optical, nonlinear optical, mechanical, electronic, magnetic, photovoltaic, and conductive properties. 20 Moreover, incorporation of a small amount of inorganic nanoparticles can dramatically improve the bulk performance of polymer matrix for optical, thermal, mechanical and other properties. [16][17][18][19] The hybrid materials also have enhanced dispersion property, which is benecial during processing.…”

Section: Introductionmentioning

confidence: 99%

Optical diffusers with enhanced properties based on novel polysiloxane@CeO₂@PMMA fillers

Zhou

Sheng

2015

J. Mater. Chem. C

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Multifunctional optical diffusers based on hybrid polysiloxane@CeO 2 @PMMA microspheres were successfully prepared by UV curing process. The novel diffusing microspheres can be synthesized via facile one-pot method, and their structure was characterized by FT-IR, TEM, SEM, XRD, and TGA. The diffusers based on polysiloxane@CeO 2 @PMMA were found to have better properties such as heat resistance, mechanical, UV-shielding, fluorescence, and anti-aging ability compared to the diffusers using organic diffusing microspheres. Moreover, the new diffuser exhibited a strong NIR absorption, which had a potential application in absorbing materials and night vision LCD monitor products. In addition, a good diffusing effect was achieved using the new diffuser, and the light-diffusing mechanism was also illustrated. Moreover, the anti-aging ability of diffusers can be gradually improved with the increasing concentration of polysiloxane@CeO 2 @PMMA fillers. The novel diffusers based on polysiloxane@CeO 2 @PMMA possessed a stronger resistance to UV aging compared to moist-heat aging.Hence, this study firstly introduced hybrid microspheres to optical diffusers, which can be used for preparing different multifunctional diffusing materials such as touch-panel functions, monitors, military projectors, and novel LCDs. † Electronic supplementary information (ESI) available: The synthesized details of polysiloxane@CeO 2 @PMMA are presented. Then, the physical and chemical properties of multifunctional microspheres of polysiloxane@CeO 2 @PMMA were examined by FT-IR, powder transmission electron microscopy (TEM), Scanning Electron Microscopy (SEM), X-ray diffraction (XRD). See

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“…[ 1,2 ] Different organic materials, like plastic, wood, paper or textiles, and compounds, such as pigments or dyes undergo proposed. These fi ndings have opened the way to precise control of the photonic crystal properties of the fi lm as well as to its formation on arbitrary surfaces.…”

Section: Introductionmentioning

confidence: 99%

Adaptable Ultraviolet Reflecting Polymeric Multilayer Coatings of High Refractive Index Contrast

Smirnov

Ito

Calvo

et al. 2015

Advanced Optical Materials

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a series of undesirable photoreactions promoted by the absorption of UV photons, which lead to the deterioration of their mechanical and optical properties. Polymers are usually transparent to part of the UV spectrum, so a commonly employed synthetic strategy to attain UV blocking fi lms is based on embedding inorganic [3][4][5][6][7] or organic [8][9][10] UV absorbers within a polymeric matrix. The main drawback of this approximation is the short term durability of the shielding effect as a result of the photodegradation of either host, guest, or both, caused by the absorption of the same radiation from which protection is sought after. [11][12][13] Approaches based on fl exible inorganic nano structured multilayers that effi ciently refl ect radiation in an arbitrary spectral range as a result of interference effects, rather than by absorption, present a promising alternative route worth to be explored. [14][15][16][17] Unfortunately, a similar approach based on the alternation of polymeric fi lms exclusively is not feasible since the refractive index contrast typically achieved is so small that a large number of layers is required to reach a signifi cant refl ectance, and only in a narrow spectral range. [ 18,19 ] The use of all-polymeric materials of high refractive index contrast to build multilayer back refl ectors or UV shields will also be an advantage in the fi eld of fl exible and polymeric solar cells, in which some approaches based on inorganic materials have already been developed. [ 20,21 ] Very recently, some of us proved that a porous stratifi ed structure displaying strong refl ection peaks in the UV range can be attained from a block copolymer (BCP) fi lm. [ 22 ] In particular, it was demonstrated that a fi lm made of a diblock copolymer containing polystyrene (PS) and polymethyl methacrylate (PMMA), in brief [poly(styreneblock -methyl methacrylate) PS-b -PMMA)], can be used as starting material to attain ordered porous multilayers through a process that involves collective osmotic shock (COS). The fi nal structure shows alternate dense and porous layers, with signifi cant refractive index contrast, which endow it with photonic crystal properties in the UV range. At that moment, the appearance of the layered structure was hypothetically attributed to dynamic effects during the COS process occurring over ordered arrangements of isolated PMMA spheres embedded in a cross-linked PS matrix in the starting slab, which had previously been subjected to thermal and UV annealing processes. Further studies, herein reported, have demonstrated that the mechanism of formation of the porous layered structure is different to that originally A synthetic route is demonstrated to build purely polymeric nanostructured multilayer coatings, adaptable to arbitrary surfaces, and capable of effi ciently blocking by refl ection a targeted and tunable ultraviolet (UV) range. Refl ection properties are determined by optical interference between UV light beams refl ected at the interfaces between polystyrene layers of diff...

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Novel approaches to flexible visible transparent hybrid films for ultraviolet protection

Cited by 114 publications

References 71 publications

Impact of nanostructured thin ZnO film in ultraviolet protection

Impact of nanostructured thin ZnO film in ultraviolet protection

Optical diffusers with enhanced properties based on novel polysiloxane@CeO₂@PMMA fillers

Adaptable Ultraviolet Reflecting Polymeric Multilayer Coatings of High Refractive Index Contrast

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Novel approaches to flexible visible transparent hybrid films for ultraviolet protection

Cited by 114 publications

References 71 publications

Impact of nanostructured thin ZnO film in ultraviolet protection

Impact of nanostructured thin ZnO film in ultraviolet protection

Optical diffusers with enhanced properties based on novel polysiloxane@CeO2@PMMA fillers

Adaptable Ultraviolet Reflecting Polymeric Multilayer Coatings of High Refractive Index Contrast

Contact Info

Product

Resources

About

Optical diffusers with enhanced properties based on novel polysiloxane@CeO₂@PMMA fillers