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Tetraethylorthosili...
Tetraethylorthosilicate-containing barrier dispersion coatings-Mechanism of action
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- Cairns, Mathew J. (författare)
- Victoria Univ Wellington, New Zealand.
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- Mesic, Behudin (Beko) (författare)
- Karlstads universitet,Institutionen för ingenjörs- och kemivetenskaper (from 2013),Scion, New Zealand.
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- Johnston, James H. (författare)
- Victoria Univ Wellington, Sch Chem & Phys Sci, POB 600, Wellington 6140, New Zealand.
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- Hill, Stefan J. (författare)
- Scion, Private Bag 3020, Rotorua 3046, New Zealand.
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- Kirby, Nigel (författare)
- Australian Synchrotron, 800 Blackburn Rd, Clayton, Vic 3168, Australia.
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Victoria Univ Wellington, New Zealand Institutionen för ingenjörs- och kemivetenskaper (from 2013) (creator_code:org_t)
- Elsevier, 2020
- 2020
- Engelska.
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Ingår i: Progress in organic coatings. - : Elsevier. - 0300-9440 .- 1873-331X. ; 139
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We demonstrate the use of tetraethylorthosilicate (TEOS) as a silica precursor for water barrier poly(styrenebutadiene) latex dispersion coating applications. The TEOS is adsorbed at the surface interface by the latex particles in the aqueous dispersion due to the hydrophobic nature of the surface and the TEOS. It then undergoes hydrolysis and condensation to the silica phase in the interstitial sites in the partially dry close-packed polymer structure. The fully cured film exhibits a greater degree of coalescence than films prepared from the unmodified latex binder. Large discrete silica particles are not formed within the cured film; rather the films contain homogenous silica dispersion with a probable particle size no larger than 10 nm. This higher degree of coalescence results in improvements in water vapour barrier performance from 121 - 20 g m(-2) d(-1), with direct water barrier performance (Cobb 120 s) improving from 25 to < 2 g m(-2), compared to the silica-free film.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Dispersion coating
- Silica
- Barrier
- WVTR
- Cobb
- TEOS
- Paper
- Kemi
- Chemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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