Deposition of amine functional silanes onto E-glass fibres, an NMR study

Watson, Hazel; Norström, Anne; Matisons, Janis G.; Root, Andrew; Rosenholm, Jarl B.

doi:10.1163/156856101317035512

Cited by 5 publications

(12 citation statements)

References 18 publications

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“…A value of 0.93 for the pure silane indicated that that some hydrolysis may have occurred in the FTIR chamber (Table 4). 29 Si NMR indicated that the ureidosilane used had not hydrolyzed prior to use in solution (10).…”

Section: Resultsmentioning

confidence: 99%

“…The permanganate reacted with impurities in the acetone to form a brown precipitate, which was removed by filtration with a Büchner funnel. The purified acetone was distilled, then stored over 3-Å molec- Molecular structure of γ -ureidopropyltrihydroxysilane, the nonlinear structure being the most conformationally favorable structure (10). ular sieve, and re-distilled immediately before use.…”

Section: Solvent Purificationmentioning

confidence: 99%

“…Previous work, however, has shown that ureido silanes have the tendency to deposit "upside down" from aqueous systems and from a range of organic solvent systems (7)(8)(9). It has recently been shown that chemisorbed ureidosilane was bonded to the surface at relatively few points with Si-O-Si bonds (10). The silane formed a highly cross-linked upper layer or skin, on top of the deposited patches of silane, giving the appearance of a fully coated fiber (9,11).…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Solvent and Fiber Treatment on the Deposition of Organic Silane Solutions Using THF and Acetone

Watson

Kaunisto

Gustafsson

et al. 2001

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 99%

Section: Solvent Purificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Solvent and Fiber Treatment on the Deposition of Organic Silane Solutions Using THF and Acetone

Watson

Kaunisto

Gustafsson

et al. 2001

Journal of Colloid and Interface Science

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“…Condensation occurs both horizontally and vertically, resulting in an incompletely cross-linked silane network [16,17]. More recent results, however, support the theory that the degree of crosslinking may also be dependent on the organo-functiona l group [6]. Patches of highly cross-linked silane have been shown to be linked by only a few bonds to the glass surface [1,6,18,19].…”

Section: Introductionmentioning

confidence: 99%

“…A large part of the work in the articles reviewed here has used dried organic solvents as carrier media [1,[6][7][8]. It has been reported that anhydrous solvents prevent, or at least limit, the chemisorption of silane onto a silicon wafer [24].…”

Section: Introductionmentioning

confidence: 99%

Ureidosilanes on E-glass fibres: deposition and surface characteristics

Watson¹,

Kaunisto²,

Rosenholm³

2002

Journal of Adhesion Science and Technology

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The behaviour of methoxy-and ethoxy-ureidosilanes deposited onto E-glass bres from both organic and aqueous solutions is reviewed.°-Ureidopropyltri(m)ethoxysilanes are used as coupling agents for paints to metal surfaces, but they have not found much use as coupling agents for E-glass bres. On metal surfaces, the silane is deposited with the ureido-functional group outermost, available for reaction with a paint / polymer matrix. On E-glass surfaces, however, unless speci c conditions are employed, ureidosilanes tend to deposit with a highly cross-linked siloxane surface. The silanol groups condense not only with silanols of adjacent silanes and the E-glass surface, but also with aluminium hydroxides leached from the E-glass surface. This forms a highly cross-linked aluminosiloxane outer layer. The aluminosiloxane forms at all pHs between 4 and 10, and also when a range of organic deposition solvents is used. 29 Si-NMR results are presented which illustrate the high level of condensation; silane to silicate binding via the amino group was not detected. A small proportion of Si O Si (silane-glass) bonds was inferred, indicating that a small number of sparsely distributed Si O Si links bound the silane to the surface. Electrokinetic analysis of the surfaces con rmed patchy deposition with a siloxane outer surface. Using AFM and ab initio calculations, it was estimated that the patchwise deposition of the silane was in the form of bilayers (or multiples of bilayers). The bilayer structure consisted of siloxane outer layers, with the inner ureido layers forming hydrogen bonds. A graphical t using the mole and volume fractions of silane and organic solvents con rmed the various types of siloxane surfaces as deposited from different organic solvents. Chlorinated solvents tended to produce a ureido outer surface, which was condensed, but solventswollen; deposition from alcohol and acetone resulted in a siloxane surface. Toluene and THF both produced minimally condensed ureido surfaces, which were easily removed by washing with methylene chloride.

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Silanes and Siloxanes as Coupling Agents to Glass: A Perspective

Matisons

2012

Advances in Silicon Science

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Deposition of amine functional silanes onto E-glass fibres, an NMR study

Cited by 5 publications

References 18 publications

The Effect of Solvent and Fiber Treatment on the Deposition of Organic Silane Solutions Using THF and Acetone

The Effect of Solvent and Fiber Treatment on the Deposition of Organic Silane Solutions Using THF and Acetone

Ureidosilanes on E-glass fibres: deposition and surface characteristics

Silanes and Siloxanes as Coupling Agents to Glass: A Perspective

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