Optical functionality of micro- and nanostructured silica surfaces prepared by a sol-gel phase separation method

Kangur, Triin; Kiisk, V.; Loot, Ardi; Timusk, Martin; Järvekülg, Martin

doi:10.1016/j.tsf.2016.12.017

Cited by 3 publications

(3 citation statements)

References 32 publications

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“…The preparation process and principle of PUA microspheres are shown in Figure 2a. Firstly, step 1 is used to prepare SiO 2 [27], using the sol-gel method. Tetraethyl silicate is dissolved in anhydrous ethanol solvent, hydrolyzed into sol, then slightly cross-linked into a loose gel network, formed, dried to remove water and ethanol, and further converted into a deeply cross-linked structure to obtain SiO 2 .…”

Section: Pua Microspheresmentioning

confidence: 99%

Polyurethane Acrylate Oligomer (PUA) Microspheres Prepared Using the Pickering Method for Reinforcing the Mechanical and Thermal Properties of 3D Printing Resin

Zhao,

Jiao,

et al. 2023

Polymers

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Some photosensitive resins have poor mechanical properties after 3D printing. To overcome these limitations, a polyurethane acrylate oligomer (PUA) microsphere was prepared using the Pickering emulsion template method and ultraviolet (UV) curing technology in this paper. The prepared PUA microspheres were added to PUA-1,6-hexanediol diacrylate (HDDA) photosensitive resin system for digital light processing (DLP) 3D printing technology. The preparation process of PUA microspheres was discussed based on micromorphology, and it was found that the oil-water ratio of the Pickering emulsion and the emulsification speed had a certain effect on the microsphere size. As the oil-water ratio and the emulsification speed increased, the microsphere particle size decreased to a certain extent. Adding a suitable proportion of PUA microspheres to the photosensitive resin can improve the mechanical properties and thermal stability. When the modified photosensitive resin microsphere content was 0.5%, the tensile strength, elongation at break, bending strength, and initial thermal decomposition temperature were increased by 79.14%, 47.26%, 26.69%, and 10.65%, respectively, compared with the unmodified photosensitive resin. This study provides a new way to improve the mechanical properties of photosensitive resin 3D printing. The resin materials studied in this work have potential application value in the fields of ceramic 3D printing and dental temporary replacement materials.

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Section: Pua Microspheresmentioning

confidence: 99%

Polyurethane Acrylate Oligomer (PUA) Microspheres Prepared Using the Pickering Method for Reinforcing the Mechanical and Thermal Properties of 3D Printing Resin

Zhao,

Jiao,

et al. 2023

Polymers

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“…Through a simple sol–gel process, which involves hydrolysis and polycondensation of the appropriate semimetal or metal oxides, these materials are produced, and their chemical and physical properties can be adjusted for desirable hydrophobicity, transparency, stability, and porosity. A wide range of thin-film deposition techniques such as chemical bath deposition, electrochemical, dip-coating, spray-coating, , and spin-coating , can be used to deposit the material on various surfaces, e.g., metal, textile, glass, etc …”

Section: Introductionmentioning

confidence: 99%

“…Through a simple sol−gel process, which involves hydrolysis and polycondensation of the appropriate semimetal or metal oxides, these materials are produced, and their chemical and physical properties can be adjusted for desirable hydrophobicity, transparency, stability, and porosity. A wide range of thin-film deposition techniques such as chemical bath deposition, 9 electrochemical, 10 dipcoating, 11 spray-coating, 12,13 and spin-coating 14,15 can be used to deposit the material on various surfaces, e.g., metal, textile, glass, etc. 16 Superhydrophobic surfaces 17 with water contact angle (WCA) larger than 150°and sliding angle (SA) less than 10°have gained significant attention due to their applications in self-cleaning, 18−20 oil−water separation, 21 anticorrosion, 22 and anti-icing.…”

Section: ■ Introductionmentioning

confidence: 99%

Composition of Organically Modified Silica for the Superhydrophobic Surface with Low Sliding Angle

et al. 2023

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Extremely water-repellent surfaces with low sliding angle (SA) have been obtained with a facile single-step sol–gel strategy via co-condensation of tetraethoxysilane (TEOS) and hexadecyltrimethoxysilane (HDTMS) in basic media with an efficient self-cleaning property. We investigated the effect of the molar ratio of HDTMS and TEOS on the properties of the modified silica-coated poly(ethylene terephthalate) (PET) film. A high water contact angle (WCA) of 165° and a low SA of 1.35° were obtained at a molar ratio of 0.125. The dual roughness pattern for the low SA was developed by a one-step coating of the modified silica with a molar ratio of 0.125. The evolution of the surface to the dual roughness pattern by nonequilibrium dynamics depended on the size and shape factor of modified silica. The primitive size and the shape factor of the organosilica with a molar ratio of 0.125 were 70 nm and 0.65, respectively. We also presented a new method to determine the superficial surface friction (ζ) of the superhydrophobic surface. The ζ was a physical parameter that characterized the slip and rolling behavior of water droplets on the superhydrophobic surface along with the equilibrium property WCA and the static frictional property SA.

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Comparison of Surface and Spectral Properties of Optical Sensor Layers Prepared by Spin/Spray Coating and Printing Techniques

et al. 2023

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This study investigated the surface properties of optical sensor layers prepared using sol-gel technology and their response to dissolved NH3. A glass substrate was used to fabricate the optical sensor layers. The sol-gel solution was applied to the glass substrate using three different techniques: spin coating (SC), inkjet printing (IP), and spray coating (SP). In this work, we have attempted to investigate the effects of the different techniques for producing the sensor layers and to determine their response in the presence of ammonia. The surface properties (surface free energy—SFE and surface chemical composition—XPS) and spectral properties (response to ammonia and real-time response) of the prepared optical sensor layers were characterised. The results show that the sensor layers prepared by different techniques have similar SFE and XPS values, but different responses to dissolved NH3 solution and different responses in real-time measurements (exposure to fresh fish). Sensor layers prepared with a spray coating (SP) are the most responsive, the most sensitive, and have a higher response over time and the biggest colour change compared to SC and IP sensor layers.

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Optical functionality of micro- and nanostructured silica surfaces prepared by a sol-gel phase separation method

Cited by 3 publications

References 32 publications

Polyurethane Acrylate Oligomer (PUA) Microspheres Prepared Using the Pickering Method for Reinforcing the Mechanical and Thermal Properties of 3D Printing Resin

Polyurethane Acrylate Oligomer (PUA) Microspheres Prepared Using the Pickering Method for Reinforcing the Mechanical and Thermal Properties of 3D Printing Resin

Composition of Organically Modified Silica for the Superhydrophobic Surface with Low Sliding Angle

Comparison of Surface and Spectral Properties of Optical Sensor Layers Prepared by Spin/Spray Coating and Printing Techniques

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