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Limits to Gelation in Colloidal Aggregation

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Title

Limits to Gelation in Colloidal Aggregation

Author(s)

Manley, S.
Cipelletti, L.
Trappe, V.
Bailey, A. E.
Scitech Instruments, Inc
Christianson, Rebecca J.
Gasser, U.
Prasad, V.
Segre, P. N.
Doherty, M. P.
Sankaran, S.
Jankovsky, A. L.
Shiley, B.
Bowen, J.
Zin Technologies, Inc.
Eggers, J.
Zin Technologies, Inc.
Kurta, C.
Zin Technologies, Inc.
Lorik, T.
Zin Technologies, Inc.

Description

We show that the dynamics of large fractal colloid aggregates are well described by a combination of translational and rotational diffusion and internal elastic fluctuations, allowing both the aggregate size and internal elasticity to be determined by dynamic light scattering. The comparison of results obtained in microgravity and on Earth demonstrates that cluster growth is limited by gravity-induced restructuring. In the absence of gravity, thermal fluctuations ultimately inhibit fractal growth and set the fundamental limitation to the lowest volume fraction which will gel.

Date Published

2018-03-26

Files

  • Download LimitsGelation_Christianson.pdf

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In Copyright - Educational Use Permitted

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Olin College of Engineering

An undergraduate engineering institution exploring innovative approaches to engineering education since its founding in 1997.

1000 Olin Way
Needham, MA 02492
781.292.2390