Hydrophobic Silsesquioxane Nanoparticles and Nanocomposite Surfaces

Mabry, Joseph M.; Vij, Ashwani; Viers, Brent D.; Grabow, Wade W.; Marchant, Darrell; Iacono, Scott T.; Ruth, Patrick N; Vij, Isha

doi:10.1021/bk-2007-0964.ch018

Cited by 7 publications

(6 citation statements)

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“…618 For the fluorinated POSS derivatives T 8 R 8 [where R ) (CH 2 ) 2 (CF 2 ) 7 CF 3 , (CH 2 ) 2 (CF 2 ) 5 CF 3 , or (CH 2 ) 2 (CF 2 ) 3 CF 3 ], the surface energy decreases as the fluoroalkyl chain length increases, and the water contact angle for the compound with R ) (CH 2 ) 2 (CF 2 ) 7 CF 3 , 154°, is higher than that of PTFE. 125,162,640,[735][736][737] The heptadecafluorodecyl derivative T 8 [(CH 2 ) 2 (CF 2 ) 7 CF 3 ] 8 has a very low solid-surface energy of ca. 10 mN m -1 (cf.…”

Section: Other Spectroscopic and Physical Propertiesmentioning

confidence: 99%

Recent Developments in the Chemistry of Cubic Polyhedral Oligosilsesquioxanes

2010

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Section: Other Spectroscopic and Physical Propertiesmentioning

confidence: 99%

Recent Developments in the Chemistry of Cubic Polyhedral Oligosilsesquioxanes

2010

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“…In general, changes in the properties are highly dependent on the POSS structure and its interactions with the polymer matrix. Recently, reports on surface modification of polymers through incorporation of POSS9, 21 and fluorinated POSS22, 23 have appeared. Previously, we reported the preferential surface segregation of nonreactive octaisobutyl POSS in POSS/polypropylene nanocomposites prepared by melt blending 9.…”

Section: Introductionmentioning

confidence: 99%

POSS‐nylon 6 nanocomposites: Influence of POSS structure on surface and bulk properties

Misra

Plagge

et al. 2009

J Polym Sci B Polym Phys

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Hybrid organic/inorganic nanocomposites based on polyhedral oligomeric silsesquioxane (POSS) nanostructured chemicals and nylon 6 were prepared via melt mixing. Two structurally and chemically different POSS molecules, a closed cage, nonpolar octaisobutyl POSS (Oib-POSS) and an open cage, polar trisilanolphenyl POSS (Tsp-POSS) with differing predicted solubility parameters were evaluated in the nylon matrix. Surface analysis, including quasi-static and dynamic nanoindentation and nanotribological techniques, revealed exceptional improvements in modulus and hardness along with significant reductions in friction. Additionally, surface wetting characteristics of the nylon were reversed, with POSS incorporation yielding low surface energy, highly hydrophobic surfaces. AFM, TEM/EDAX, spectroscopic techniques and thermomechanical analysis were used to evaluate nanoscale dispersion and bulk properties of the composites. Both POSS molecules exhibit preferential surface segregation behavior in the nylon matrix. Tsp-POSS, with its higher predicted solubility in nylon, exhibited enhanced dispersion and tribomechanical properties at both nano and bulk scale. EXPERIMENTAL MaterialsAn unfilled and nonlubricated grade of nylon 6 homopolymer (Capron V R 8202 NL, M w ¼ 71,000 D,

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“…In addition, Mabry et al (2007) introduced a kind of fluorinated polyhedral oligomeric silsesquioxane (POSS) into PCTFE and demonstrated that this filler endows the composite material with excellent hydrophobicity. The water contact angle was even larger than that of neat PCTFE.…”

Section: Blending Modificationmentioning

confidence: 99%

“…FIGURE 10 | The reactions used to introduce (A) hydroxyl, (B) formyl, and (C) carboxylic groups onto the surface of PCTFE(Mabry et al, 2007).…”

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Structure, Properties, and Modification of Polytrifluorochloroethylene: A Review

et al. 2022

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Polytrifluorochloroethylene (PCTFE) is one of the earliest synthesized and commercialized fluoroplastics. It shows ultralow dielectric constant and loss coupled with other excellent properties such as good water vapor permeation resistance, anti-corrosion, light transparency, creep resistance, and so forth, exhibiting great potential to break the bottleneck of the development of high-frequency communication field. Besides, PCTFE-based materials have already played an essential role in some high-tech fields, including chemical, medical, aerospace, and electrical industries. However, in terms of fundamental research, most of the reports concerning the chemical and physical structure of PCTFE came from the last century, but very few in recent years. Herein, the history of the development and the research progress of the structure, properties, and modification of PCTFE was introduced respectively and finally the perspective was proposed, aiming to provide guidance for the future research and application of PCTFE-based materials.

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Hydrophobic Silsesquioxane Nanoparticles and Nanocomposite Surfaces

Cited by 7 publications

References 0 publications

Recent Developments in the Chemistry of Cubic Polyhedral Oligosilsesquioxanes

Recent Developments in the Chemistry of Cubic Polyhedral Oligosilsesquioxanes

POSS‐nylon 6 nanocomposites: Influence of POSS structure on surface and bulk properties

Structure, Properties, and Modification of Polytrifluorochloroethylene: A Review

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