Hybrids of colloidal silica and waterborne polyurethane

Yang, Chien‐Hsin; Liu, Feng‐Jiin; Liu, Yunpeng; Liao, Wei-Tung

doi:10.1016/j.jcis.2006.06.001

Cited by 93 publications

(43 citation statements)

References 30 publications

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“…Similar explanation can be used for the D c because Q i peaks corresponding to colloidal silica, whereas the weighting and power numbers of Q i proportions are higher than T i species (see Equation (1)). In comparison to our previous work [25], there exist significant differences in the 29 Si CP/MAS NMR results between the system in this work and the hybrid films of WPU and colloidal silica [25].…”

Section: Characterizationcontrasting

confidence: 92%

“…This leads to a hazy thin film. This is different from the simple WPU-silica hybrid films [25] which the transmittance at 633 nm decreases from 92% of pure WPU to 20% of the hybrid with 20% silica content, and then gradually increases from 20 to 87% of the hybrid with 50% silica content. …”

Section: Uv-vis Spectracontrasting

confidence: 73%

“…Evidently, the incorporation of MSMASiO 2 in WPU-AC polymer chains produces a network structure through the UV-curable cross-linking, leading to a significant improvement in the mechanical properties which is in agreement with the FTIR and NMR results. The mechanical strength of the UV-cured WPU-AC incorporating MSMASiO 2 films is higher than that of the simple WPUsilica hybrid films [25]. Also note that the plateau strength seems to be reached at 20% MSMA-SiO 2 content, reflecting that the aggregation of silica particles becomes more significant at MSMA-SiO 2 content higher than 20% (see Figure 7B).…”

Section: Mechanical Propertiesmentioning

confidence: 89%

“…Such composite films could have important applications for optical coating or refractive index tuning films. In our previous work [25], waterborne polyurethane (WPU) was synthesized and followed by adding colloidal silica to prepare WPU-silica hybrids. The silica content in the hybrid thin films was varied from 0 to 50 wt%.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid thin films derived from UV-curable acrylate-modified waterborne polyurethane and monodispersed colloidal silica

Lin¹,

Yang

Wang³

et al. 2012

Express Polym. Lett.

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Abstract. Hybrid thin films containing nano-sized inorganic domains were synthesized from UV-curable acrylate-modified waterborne polyurethane (WPU-AC) and monodispersed colloidal silica with coupling agent. The coupling agent, 3-(trimethoxysilyl)propyl methacrylate (MSMA), was bonded onto colloidal silica first, and then mixed with WPU-AC to form a precursor solution. This precursor was spin coated, dried and UV-cured to generate the hybrid films. The silica content in the hybrid thin films was varied from 0 to 30 wt%. Experimental results showed the aggregation of silica particles in the hybrid films. Thus, the silica domain in the hybrid films was varied from 30 to 50 nm by the different ratios of MSMAsilica to WPU-AC. The prepared hybrid films from the crosslinked WPU-AC/MSMA-silica showed much better thermal stability and mechanical properties than pure WPU-AC.

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Section: Characterizationcontrasting

confidence: 92%

Section: Uv-vis Spectracontrasting

confidence: 73%

Section: Mechanical Propertiesmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid thin films derived from UV-curable acrylate-modified waterborne polyurethane and monodispersed colloidal silica

Lin¹,

Yang

Wang³

et al. 2012

Express Polym. Lett.

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“…Yang et al demonstrated that colloidal silica led to considerable increase of thermal stability of polyurethane foil in comparison with the non-modified foil [7]. When talc, mica, or montmorillonite are used as fillers they need to intercalate with amino acids, ammonium, or phosphonium salts [8], otherwise the fillers separate from compositions.…”

Section: Introductionmentioning

confidence: 99%

Oligoetherols and polyurethane foams obtained from metasilicic acid

Chmiel

Lubczak

2017

Polym. Bull.

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Metasilicic acid obtained from aqueous solution of sodium silicate was allowed to react with excess glycidol. The obtained semi-product was hydroxyalkylated with ethylene carbonate to obtain oligoetherol. The structure of the oligoetherol was determined by chemical and instrumental methods. Further the oligoetherol was used to obtain foamed polyurethane compositions. The properties of the foams were also studied.

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Preparation of nanosilica reinforced waterborne silylated polyether adhesive with high shear strength

Zhang

You

Huang

et al. 2008

J of Applied Polymer Sci

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Waterborne adhesives are extremely environment-friendly but unfortunately deficient in mechanical properties. In this article, nanosilica, stemming from tetraethyl orthosilicate (TEOS), silica sol, and/or fumed silica powder, was employed to reinforce the waterborne silylated polyether adhesives. Effects of TEOS content, silica sol content, and the type and content of fumed silica on the shear strength of the adhesive were investigated using a scanning electronic microscope and an electronic instron tester and the strengthening mechanisms of different silica source were discussed. All the shear strengths of silylated polyether adhesives first increased and then decreased as TEOS content, silica sol content or fumed silica content increased. Colloidal silica particles was less efficient than fumed silica particles for reinforcing the polyether adhesive but can increase the shear strength of hydrophobic fumed silica embedded adhesive. Comparing the adhesives with the hydrophilic fumed silica (HS-5) or the extremely hydrophobic fumed silica (TS-720), the adhesive with moderate hydrophobic fumed silica (TS-610) had the highest shear strength. The maximal shear strength of 2.5 MPa was achieved when TEOS, silica sol, and fumed silica were combined. It seemed that TEOS, silica sol, and fumed silica played crosslinking (with polyether chain), dispersing (for fumed silica), and reinforcing roles on waterborne adhesive, respectively. This reinforcing mechanism opened a new way to fabricate waterborne adhesives (or coatings) with high performances.

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Hybrids of colloidal silica and waterborne polyurethane

Cited by 93 publications

References 30 publications

Hybrid thin films derived from UV-curable acrylate-modified waterborne polyurethane and monodispersed colloidal silica

Hybrid thin films derived from UV-curable acrylate-modified waterborne polyurethane and monodispersed colloidal silica

Oligoetherols and polyurethane foams obtained from metasilicic acid

Preparation of nanosilica reinforced waterborne silylated polyether adhesive with high shear strength

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