科研之友
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摘要
In this publication we systematically compared the surface rheological properties of different polysiloxane capsule membranes with planar cross-linked films of the same chemical composition. We performed interfacial rheological measurements and different experiments of the capsule deformation in shear and centrifugal fields. In a series of experiments we determined the surface shear and Young%26apos;s moduli of the polysiloxane membranes. These investigations allowed us to calculate the two-dimensional Poisson ratio of the viscoelastic polysiloxane shells. We also compared the yield values of the capsule deformation D-max and the maximal shear strain gamma(max), which describe the limits of the linear viscoelastic response. In the regime of large centrifugal forces, we observed a new capsule bursting mechanism. For small deformations, where the membranes showed linear-viscoelastic properties we found a very good agreement between measurements and theoretical predictions.
- 出版日期2012
