## 2 Stability
### Production of Sensor  
Given that we evaluated the effectiveness of utilizing PDMS in combination with NR- or CR- latex and Q, we attempt to produce a sensor using PDMS. It is evident from Figure 3 that the MCF rubber \begin{table}
\begin{tabular}{c c c c} \hline \hline \multicolumn{1}{c}{**Mass at 0 Day [g]**} & \multicolumn{1}{c}{**Mass After 2 Days [g]**} & \multicolumn{1}{c}{
\begin{tabular}{c} **Ratio of Water Evaporation** \\ **(RWE) (\%)** \\ \end{tabular} } \\ \hline KE1300T & 0.1573 & 0.1538 & 2.225 \\ KF96 & 0.0678 & 0.0648 & 2.234 \\ Non-PDMS & 0.2372 & 0.2319 & 4.424 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Change of the mass of MCF rubber sheet and ratio of water evaporation. Figure 4: Relation between stress strain and stress in tension; as for KE1300T, 3 g KE1300T + 3 g PVA; as for Non-PDMS, without KE1300T or KF96 + 3 g, and PVA; as for KF96, 3 g KF96 + 3 g PVA; all has 3 g NR-latex (Ulacol) + 3 g CR-latex (671A) + 0.75 g MF(W-40) + 3 g Ni. that is electrolytically polymerized with PDMS is highly porous. Therefore, we infiltrated liquids using a vacuum as shown in (g) in Figures 5 and 6  
Prior to the infiltration, we prepared the electrolytically polymerized MCF rubber with PDMS as shown in (f), which is the same as that shown in Figure 3. The order of (a) and (b) in Figure 5 is significant. As for (b) in Figure 5, TiO\({}_{2}\) is appropriate for combining with MCF before mixing Ni. The electrolytic polymerization of (e) in Figure 5 occurs for an applied electric field at 20 V, 2.7 A, and 5 min. The filtrated liquid can be anything, therefore, the MCF rubber can be fabricated using any intelligent liquid including battery acid, electrolyte, etc. Therefore, it is possible to produce a novel intelligent material using any intelligent fluid. In the present report, we used glycerin (99.5%, Kanto Chemical Co., Inc., Tokyo, Japan) because of the possibility of resolving instability (1). During filtration,  
Figure 5: Procedure of the production of an MCF rubber sensor by combining PDMS and PVA. Figure 6: Physical model of infiltrated MCF rubber with a liquid. the MCF rubber (f) is light enough to float upwards. Therefore, it must be held down by a weight in the infiltrating liquid. In the case of instability (2), to abate the vulcanization of the MCF rubber from the time of electrolytic polymerization, which is not during the process but past the endpoint, the final procedure of drying the MCF rubber sensor shown in Figure 5 is important. The vulcanization of the MCF rubber achieved via both electrolytic and thermal polymerization. The latter is for drying. However, the MCF rubber liquid with hydrate must be prepared as shown in (d) in Figure 5. The metal complex hydrate Na\({}_{2}\)WO\({}_{4}\)\(\cdot\)2H\({}_{2}\)O and Na\({}_{2}\)MoO\({}_{4}\)\(\cdot\)2H\({}_{2}\)O are suitable for the MCF rubber liquid combined with PDMS. Using the same MCF rubber sensor production process as in the previous study [8], MCF rubber liquid with hydrate (d) inserted between the sandwiched MCF rubber (g) together with thin electrical wires is electrolytically polymerized as shown in (h) and (i) in Figure 5. The electrolytic polymerization of (h) occurs at 30 V, 2.7 A, 5 min., and (i) 30 V, 2.7 A, 15 min in an air atmosphere. The constituent includes 3 g PDMS, 3 g PVA, 3 g NR-latex (Ulacol), 3 g CR-latex (671A), 0.5 g Na\({}_{2}\)WO\({}_{4}\)\(\cdot\)2H\({}_{2}\)O, 0.75 g MF (W-40), and 3 g Ni for (c) in Figure 5, 1 g Ni for (d) in Figure 5. At all electrolytic polymerizations (e), (h), (i), a static magnetic field intensity of 312 mT produced by permanent magnets as paired opposites is applied to a pair of two stainless electrodes with a 1 mm gap. Incidentally, the hard adhesion of the MCF rubber with hydrate to metal could be confirmed. Most metals adhere including gold, silver, and platinum, except for Cr and Ti.