Mechanical strength of microcapsules

The micromanipulation technique has been used to measure the mechanical strength of microcapsules of different size, shell thickness and shell composition (Sun and Zhang, 2001,2002 Xue and Zhang, 2008 Zhao and Zhang, 2004 Zhang et al., 1999). For example, the mechanical... 

Taguchi and Tanaka have described a similar method to measure the mechanical strength of microcapsules [46]. The instrument, a destruction tester (Aikoh Co. Ltd., Model 1307), which is used for such studies is shown in Figure 5.16. 

The mechanical strength of microcapsules has been measured using the method described in Section 5.3.2. Loaded pressure is calculated from Eq. (4) (see Section 5.3.2), and the broken ratio is defined as the ratio of the number of microcapsules broken at a given pressure to that of all microcapsules measured. From Figure 5.19 it is clear that the broken ratios for microcapsules with fiber incorporated into the capsule wall are smaller than for microcapsules without fiber. This mechanical strength of microcapsules is increased by the incorporation of fiber into the EPS. 

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