Preparation and properties of polysilsesquioxanes: Polysilsesquioxanes and flexible thin films by acid-catalyzed controlled hydrolytic polycondensation of methyl- and vinyltrimethoxysilane

Takamura, Norihiro; Gunji, Takahiro; Hatano, Hitoshi; Abe, Yoshimoto

doi:10.1002/(sici)1099-0518(19990401)37:7<1017::aid-pola16>3.0.co;2-f

Cited by 87 publications

(58 citation statements)

References 21 publications

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“…Solid-state CP/MAS NMR measurements were carried out with samples in double air bearing 6 mm rotor of zirconia on a JEOL JNM ECA500 spectrometer, operating at 53.5 MHz for 29 Si. Magic angle spinning was performed at 5.6 kHz spinning rate.…”

Section: Generalmentioning

confidence: 99%

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Graft Polymerization of Dimethylacrylamide onto Polysilsesquioxane Containing Mercapto Groups

Yamamoto

Shimada

Kimura

et al. 2004

Polym J

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ABSTRACT:Polysilsesquioxane having phenyl and mercapto groups (PMPSQ) was prepared from (3-mercaptopropyl)trimethoxysilane (MTMS) and phenyltrimethoxysilane (PTMS) by co-condensation under basic conditions. The polymerization utilizing mercapto groups on PMPSQ with dimethylacrylamide (DMAA) under UV irradiation was shown to be a simple and convenient procedure for the formation of the graft polymer (PMPSQ-g-PDMAA). In the photo-initiated radical polymerization, no gelation was observed. The introduction of hydrophilic graft chain was effective to transform the hydrophobic polysilsesquioxane PTMS into the amphiphilic PMPSQ-g-PDMAA, which was evaluated by the measurements of contact angle.

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Section: Generalmentioning

confidence: 99%

“…The proton 90 pulse was 4 ms for 29 Si NMR measurements. Polydimethylsilane was the reference for 29 Si NMR spectra. IR spectra were recorded on a JASCO FT/IR 230.…”

Section: Generalmentioning

confidence: 99%

Graft Polymerization of Dimethylacrylamide onto Polysilsesquioxane Containing Mercapto Groups

Yamamoto

Shimada

Kimura

et al. 2004

Polym J

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“…Thus, strength and elastic modulus increase with the increase of the ratio of the T 3 unit. 2,8 In contrast, the hybrid with a high ratio of T 1 and T 2 units can show the flexibility and the larger elongation at fracture. In our previous report, the ratio of T 3 unit was pure PMSQࢽTa-PMSQ hybrid.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] This hybrid comprises T 1 , T 2 , and T 3 unit structures, where T n is shown as the siloxane unit structure of CH 3 Si OSi n X 3-n =nࢼ1-3 and XࢼOR or OH, Rࢼalkyl group?. Metal alkoxide is often used with the precursor silicon alkoxide and copolymerized, as metal alkoxide can play a catalytic role in the hydrolysis-condensation of silicon alkoxide.…”

Section: Introductionmentioning

confidence: 99%

“…As seen from previous reports, the fracture behavior of the PMSQ-based hybrid is found to be strongly correlated with its molecular structure, namely, the ratio of the T 3 unit. 2 In the PMSQ hybrid material, the high ratio of the T 3 unit means the occurrence of condensation among silanol ĻSi-OH, less terminal sites such as silanol or ethoxy ĻSi-OC 2 H 5 group, and the following larger number of inorganic siloxane bonds, compared with the T 1 and T 2 units. Thus, strength and elastic modulus increase with the increase of the ratio of the T 3 unit.…”

Section: Introductionmentioning

confidence: 99%

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Oil Wettability and Sliding Properties of Organic and Inorganic Hybrid Coating Films Prepared from Methyltriethoxysilane and Various Metal Alkoxides

Fukushima

Yasuda

Kita

et al. 2006

J. Ceram. Soc. Japan

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The oil wettability and sliding property of polymethylsilsesquioxane PMSQ based organic inorganic hybrid coating films prepared from methyltriethoxysilane and various metal alkoxide were investigated. The wettability of oil increased in the order of PMSQࢻTa-ࢻTi-ࢻAl-PMSQ, and was strongly affected by the surface roughness. The friction coefficient showed that Ti-PMSQ among hybrid coating films was the lowest value, which was found to be due to the presence and maintenance of the lubricating oil film during the sliding tests.

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Hydrogen Silsesquioxane‐Based Nanofluidics

Punniyakoti

Sivakumarasamy

Vaurette

et al. 2017

Adv Materials Inter

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Nanofluidics show great promise for the control of small volumes and single molecules, especially for biological and energy applications. To build up more and more complex nanofluidics systems, a versatile and reproducible fabrication technique with nanometer precision alignment is desirable. In this article, two e‐beam lithography methods to fabricate nanofluidic channels based on hydrogen silsesquioxane, a high‐resolution negative‐tone inorganic resist, are presented. The robustness and versatility of the fabrication processes are demonstrated on silicon, glass, and flexible substrates. The high precision ability is illustrated with nanometric alignment of nanofluidic channels on gold nanoparticles and nanotransistor sensors, as well as for 3D nanofluidics prototyping. Furthermore, an unexpected extremely slow water evaporation rate (≈1 week for 300 μm long nanochannels) is noticed. This feature enables a simple and reliable manipulation of nanofluidic chips for various studies.

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Preparation and properties of polysilsesquioxanes: Polysilsesquioxanes and flexible thin films by acid-catalyzed controlled hydrolytic polycondensation of methyl- and vinyltrimethoxysilane

Cited by 87 publications

References 21 publications

Graft Polymerization of Dimethylacrylamide onto Polysilsesquioxane Containing Mercapto Groups

Graft Polymerization of Dimethylacrylamide onto Polysilsesquioxane Containing Mercapto Groups

Oil Wettability and Sliding Properties of Organic and Inorganic Hybrid Coating Films Prepared from Methyltriethoxysilane and Various Metal Alkoxides

Hydrogen Silsesquioxane‐Based Nanofluidics

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