Antifogging Hybrid Materials Based on Amino-Functionalized Polysilsesquioxanes

Maeda, Tetsuya; Hamada, Takashi; Tsukada, Shinya; Katsura, Daiji; Okada, Kenta; Ohshita, Joji

doi:10.1021/acsapm.1c00155

Cited by 24 publications

(55 citation statements)

References 47 publications

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“…As reported in a previous study, the PAEAPS film with an amino group in the side chain exhibited high WU. 40 The WU of the PSQ-OH film was lower than that of the PAEAPS film (Table 2) owing to the hydrophilicity of the side chain in the polymer. In other words, the amino groups in the side chain of PAEAPS effectively absorbed more water than the hydroxy group in the side chain of PSQ-OH.…”

Section: ■ Introductionmentioning

confidence: 96%

“…The main signal at −66 ppm attributed to the T 3 structure was observed in the solid-state 29 Si NMR of the PGPS films, where T n denotes the siloxane structural unit. 40 The calculated cross-linking ratios of the PGPS films based on T 3 /T total ranged from 82 to 88%, which increased in the following order: water/monomer molar ratio = 1.2, 1.5, and 1.6. PGPS with a high molecular weight formed a crosslinked network, and the obtained film was too stiff, resulting in crack formation.…”

Section: ■ Introductionmentioning

confidence: 97%

“…The detailed procedure is described in a previous study. 40 The elastic deformation work (η) of the films was also measured using an Agilent Technologies Nano Indenter G200 and was estimated according to the literature. 44 ■ RESULTS AND DISCUSSION Synthesis of PGPS by Hydrolysis and Polycondensation.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Furthermore, the PSQ-OH film did not peel off after tape testing and exhibited good adhesion to the glass substrate owing to the formation of Si− O−Si bonds, similar to the PAEAPS film. 40 Antifogging and Mechanical Properties of the PSQ-OH Film via Routes A and B. To compare the antifogging and mechanical properties of the PSQ-OH films prepared via routes A and B, the WU and scratch resistance were investigated; the results are presented in Table 2.…”

Section: ■ Introductionmentioning

confidence: 99%

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Robust and Transparent Antifogging Polysilsesquioxane Film Containing a Hydroxy Group

et al. 2022

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Poly(glycidyloxypropyl)silsesquioxane (PGPS) was successfully synthesized by hydrolysis and polycondensation using the nitrogen flow method. A poly(3-(2,3-dihydroxypropoxypropyl)silsesquioxane) (PSQ-OH) film was prepared via two routes. In route A, PSQ-OH was prepared by the hydrolysis of the epoxy group of PGPS in an aqueous hydrochloric acid (HCl)/tetrahydrofuran solution, affording a diol group; then, PSQ-OH was coated on a glass substrate and heated. The antifogging performance of the PSQ-OH film was evaluated in terms of water uptake (WU) and scratch resistance. The obtained PSQ-OH film exhibited a low WU of 5% and a scratch resistance of 1.6. In route B, PGPS was coated on a glass substrate and immersed in a 0.5 mol/L aqueous sulfuric acid solution for 1–15 h at room temperature, producing a diol group. The solid-state 13C nuclear magnetic resonance spectrum indicated that the epoxy group was completely hydrolyzed after immersion for 15 h. The WU of the PSQ-OH film prepared via route B increased from 5 to 19% with the increase in the immersion time and was higher than that of the PSQ-OH film prepared via route A. The PSQ-OH film on a glass substrate retained transparency under water vapor exposure at 60 °C. The PSQ-OH film prepared via route B exhibited a high scratch resistance of 2.7–3.6, similar to that of a poly(3-(2-aminoethylaminopropyl)silsesquioxane) film. The scratch resistance of the PSQ-OH film was 5–7 times higher than that of the poly(vinyl alcohol) film. The PSQ-OH film was uniform with no pinholes and cracks. The PSQ-OH film was transparent and colorless and exhibited a high transmittance of >90% in the wavelength range of 400–800 nm. Overall, the prepared PSQ-OH film exhibits good antifogging, transparency, and mechanical properties.

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Section: ■ Introductionmentioning

confidence: 96%

Section: ■ Introductionmentioning

confidence: 97%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Robust and Transparent Antifogging Polysilsesquioxane Film Containing a Hydroxy Group

et al. 2022

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“…The hybrid antifogging materials ( 46 ) ( Figure 12 ) were obtained in Ref. [ 94 ]. They displayed high water absorption (up to 42%), which was 1.5 times higher than that of the typical antifogging polymer polyvinylalcohol (PVA).…”

Section: Silatranyl Materialsmentioning

confidence: 99%

3-Aminopropylsilatrane and Its Derivatives: A Variety of Applications

et al. 2022

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Silatranes arouse much research interest owing to their unique structure, unusual physical–chemical properties, and diverse biological activity. The application of some silatranes and their analogues has been discussed in several works. Meanwhile, a comprehensive review of the wide practical usage of silatranes is still absent in the literature. The ability of silatranes to mildly control hydrolysis allows them to form extremely stable and smooth siloxane monolayers almost on any surface. The high physiological activity of silatranes makes them prospective drug candidates. In the present review, based on the results of numerous previous studies, using the commercially available 3-aminopropylsilatrane and its hybrid derivatives, we have demonstrated the high potential of 1-organylsilatranes in various fields, including chemistry, biology, pharmaceuticals, medicine, agriculture, and industry. For example, these compounds can be employed as plant growth biostimulants, drugs, optical, catalytic, sorption, and special polymeric materials, as well as modern high-tech devices.

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Hydrophilic Surface Modification of Poly(methyl methacrylate)/Poly(methyl methacrylate‐co‐acrylic acid) Composite Film by Surface Activation

Sun,

Hu,

Wang

et al. 2023

Macro Chemistry & Physics

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Focus on hydrophilic surface modification of poly(methyl methacrylate)/poly(methyl methacrylate‐co‐acrylic acid) (PMMA/PMMA‐co‐PAA) composite film, the copolymer is synthesized to improve the hydrophilic and compatibility with PMMA matrix, and the composite film is subjected to surface activation using a sodium hydroxide solution. The infrared absorption peaks corresponding to ‐OH and ‐C = O functional groups become progressively weaker with the increase of copolymer content, indicating the formation of intermolecular hydrogen bonds. The hydroxyl absorption peak is significant and two new absorption peaks corresponding to the symmetric contraction and antisymmetric contraction of ‐COO‐ appeared, indicating that sodium hydroxide solution can disrupt the intermolecular hydrogen bond and react with acrylic acid to form sodium acrylate to make the surface contain sodium elements. The elemental sodium content on the composite film can reach 1.9% and the nanostructures contain 20 times more sodium than the smooth parts, indicating the sodium acrylate can induce surface segregation of PMMA and form nanoparticle‐like structures to improve surface roughness. The hydrophilic component combined with the surface structure makes the contact angle less than 10°. Furthermore, thermostability can be slightly promoted by introducing the copolymer which is closely related to the intermolecular hydrogen bonding formed directly between the copolymer and the PMMA matrix.This article is protected by copyright. All rights reserved

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Antifogging Hybrid Materials Based on Amino-Functionalized Polysilsesquioxanes

Cited by 24 publications

References 47 publications

Robust and Transparent Antifogging Polysilsesquioxane Film Containing a Hydroxy Group

Robust and Transparent Antifogging Polysilsesquioxane Film Containing a Hydroxy Group

3-Aminopropylsilatrane and Its Derivatives: A Variety of Applications

Hydrophilic Surface Modification of Poly(methyl methacrylate)/Poly(methyl methacrylate‐co‐acrylic acid) Composite Film by Surface Activation

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