Nanosilica reinforced waterborne siloxane-polyurethane nanocomposites prepared via “click” coupling

Li, Xingjian; Hu, Jing; Sun, Dongbai; Zhang, Yiheng

doi:10.1007/s11998-013-9563-6

Cited by 14 publications

(5 citation statements)

References 50 publications

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“…The wide bands between 3300 and 3500 cm −1 in Figs. 4(a) and 4(b) were attributed to the presence of the stretching vibration of N-H and O-H bonds and interactions hydrogen bonds between functional groups such as amine, hydroxyl and carbonyl [48][49][50] . Furthermore, the bands at 1690 cm −1 were attributed to the stretching vibration of C=O in the urethane group.…”

Section: Structures Of Wpu and Wpu/poss Hybrid Filmsmentioning

confidence: 99%

“…The core of POSS is a silica cage consisting of Si-O-Si, and the shell layer consists of organic reactive groups that can be compounded with polymers at the molecular level, thus forming a molecular organic/inorganic hybrid. The unique properties of POSS result in a strong interaction between the organic and inorganic components [43][44][45][46][47][48][49] .…”

Section: Introductionmentioning

confidence: 99%

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Polyhedral Oligomeric Silsesquioxane (POSS) as Reinforcing Agent for Waterborne Polyurethane Coatings on Wood

et al. 2019

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Polyhedral oligomeric silsesquioxane (POSS) was added as a reinforcing agent in waterborne polyurethane (WPU)-based coatings to improve their properties. The morphology, structure, thermal stability as well as mechanical properties of the resulting WPU and WPU/POSS hybrid films were investigated. The good compatibility of POSS in the WPU matrices was demonstrated by transmission electron microscopy. Furthermore, Fourier-transform infrared spectroscopy analysis (FTIR) suggested the successful bonding of POSS and WPU matrices. The thermal stability of WPU/POSS hybrids was improved than that of pure WPU according to thermal gravimetric analysis (TGA). The results also revealed the enhancement of the pencil hardness and abrasion resistance of the hybrid films compared with WPU. However, the pull-off adhesion slightly decreased from Grade 0 to Grade 2.

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Section: Structures Of Wpu and Wpu/poss Hybrid Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyhedral Oligomeric Silsesquioxane (POSS) as Reinforcing Agent for Waterborne Polyurethane Coatings on Wood

et al. 2019

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“…The absorption band at 1225 cm −1 is ascribed to the C=O of the polycarbonate glycol. For WPU-1, WPU-2, and WPU-3, the absorption peaks for the stretching vibration of Si–O–Si and C–O–C were at 1043 cm −1 and 731 cm −1 [24].…”

Section: Resultsmentioning

confidence: 99%

In Situ Incorporation of Diamino Silane Group into Waterborne Polyurethane for Enhancing Surface Hydrophobicity of Coating

Lyu

Zhang

et al. 2019

Molecules

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A series of waterborne polyurethanes (WPU) with crosslinked siloxane were obtained through introducing 3-(2-aminoethylamino)propyldimethoxymethylsilane (APTS) into WPU by in situ polymerization. The properties of WPU modified by APTS were studied through a variety of experimental methods. The water contact angle of the WPU coating surface increased from 64° to 86°, and the water resistance reduced to 3.90% when 3 wt% APTS was added, which improved the coating surface hydrophobicity. Firstly, Fourier transform infrared (FT-IR) and 1H-NMR spectra demonstrated the successful incorporation of APTS to polyurethanes and completed the hydrolytic condensation reaction-generated Si–O–Si crosslinking structure. Furthermore, the surface energy of the membrane was reduced when the crosslinking structure migrated and enriched on the surface of film. Besides, the crosslinking structure was abundant, and the distribution of siloxane in WPU was more uniform.

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“…The solvent resistance of all the PUD samples are closely related due to the fact that the free volume of the molecular chains increased by decreasing of siloxane cross-linking density and made the film surface easier for the penetration of solvents into the PUD matrix. 30 However, all the film samples dissolved in alkali solution after 4 h of immersion and this is mainly because of the existence of ester linkages in the mixed polyol which experienced a severe hydrolysis reaction in alkali media.…”

Section: Resultsmentioning

confidence: 99%

Ionizable polyol from cottonseed oil for anionic waterborne polyurethane-silanol dispersions

Gaddam

Palanisamy

2019

Polymers from Renewable Resources

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A novel cottonseed oil-based ionizable polyol was introduced as ionic soft segment in waterborne polyurethane dispersion (PUD) synthesis. The ionizable polyol was synthesized by ring opening of epoxidized cottonseed oil (ECSO) with 4-aminobenzoic acid (PABA) and blended with hydroxylated cottonseed oil polyol (HCSO) in different weight ratios to develop a series of mixed polyols having different hydroxyl numbers viz., 146, 130 and 114 mg KOH/g. Three different PUDs were synthesized using the mixed polyols, isophorone diisocyanate, and 3-aminopropyltriethoxysilane. The chemical structure, thermo-mechanical properties, and surface properties of cured PUD films were examined using Fourier-transform infrared spectroscopy (FTIR), Dynamic mechanical thermal analysis (DMTA), universal testing machine (UTM) and contact angle measurements respectively. The effect of Si–O–Si cross-linking network density, which increases with an increase in OH values of the mixed polyol was also investigated. All the PUDs prepared in this study exhibited good storage stability (>4 months), and the average particle sizes of PUDs ranged from 18 to 124 nm. The highest hydroxyl mixed polyol derived PUD film (PUD-35 film) exhibited high thermal stability, mechanical strength; Tg value, water contact angle value, chemical, and abrasion resistance properties due to the extended siloxane cross-link network structure. The introduction of ionizable polyol into the soft segment led to an improvement in hard and soft segment phase mixing of PUDs, and this strategy could enrich the exploration of new synthetic methodologies in the field of bio-based PUD manufacturing.

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Nanosilica reinforced waterborne siloxane-polyurethane nanocomposites prepared via “click” coupling

Cited by 14 publications

References 50 publications

Polyhedral Oligomeric Silsesquioxane (POSS) as Reinforcing Agent for Waterborne Polyurethane Coatings on Wood

Polyhedral Oligomeric Silsesquioxane (POSS) as Reinforcing Agent for Waterborne Polyurethane Coatings on Wood

In Situ Incorporation of Diamino Silane Group into Waterborne Polyurethane for Enhancing Surface Hydrophobicity of Coating

Ionizable polyol from cottonseed oil for anionic waterborne polyurethane-silanol dispersions

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