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Perikinetic aggrega...
Perikinetic aggregation of alkoxylated silica particles in two dimensions
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Hansen, PHF (författare)
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- Bergström, L (författare)
- RISE,YKI – Ytkemiska institutet
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(creator_code:org_t)
- 1999
- 1999
- Engelska.
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Ingår i: Journal of Colloid and Interface Science. - 0021-9797 .- 1095-7103. ; 218, s. 77-87
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Aggregation and cluster formation of a two–dimensional colloidal system consisting of 2 mm alkoxylated silica particles trapped at the air-toluene interface has been studied. This novel system allows particle interactions to be controlled by varying the length of the grafted alkyl chains; simple estimates suggest particle bond-strengths of 15 kT and 30 kT for the octadecyl and octyl coated system, respectively. Video enhanced microscopy and image analysis enabled a simultaneously study of kinetics and structure of the ensemble of clusters, in situ. The octyl system displayed a DLCA like structure, Df ≈1.45, while the octadecyl system resulted in a more dense structure, Df ≈ 1.55. The temporal evolution of the cluster-mass distribution displayed a transition point between regimes of slower and faster aggregation for both systems, which was interpreted as a transition from DLCA to convection limited cluster aggregation (CLCA).
Nyckelord
- Perikinetic aggregation
- particle interactions
- fractal dimension
- dynamic scaling
- image analysis
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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