• Journal of the Korean Chemical Society
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• v.41 no.12
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• pp.653-660
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• 1997

Silicone rubber-matrix membranes doped with tetradecyltrimethylammonium chloride (TDTMACl) are used to enhance electrode performance for chloride measurements in physiological samples. The optimized membrane formulation incorporates 95.4 wt% silicone rubber and 4.6 wt% TDTMACl, and its pH response is negligible in the range of pH 6-10. The TDTMACl-doped silicone rubber membrane exhibits sub-Nernstian response to chloride from 10 to 300 mM (-37.5 mV/decade), but its selectivities for chloride over other anions are remarkably enhanced: KpotCl,NO3=1.3, KpotCl,I=2.0, KpotCl,Sal=0.8, KpotCl,SCN=2.0 and KpotCl,ClO4=0.8. Furthermore, since the silicone rubber-matrix membrane exhibits better adhesion to the solid surface than do PVC membranes, the lifetime of the coated-wire type membrane electrode is greatly improved. The response properties toward chloride and salicylate for solid-state sensor are not significantly changed after at least 35 days of use.

• Journal of the Korean Chemical Society
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• v.48 no.3
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• pp.266-272
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• 2004

We developed a miniaturized solid-state carbonate ion-selective electrode (carbonate ISE) based on one-component room temperature vulcanizing type silicone rubber 730 (730 RTV) without adding plasticizer to the matrix. The optimized carbonate ion selective membrane is prepared with 85.8 wt% of 730 RTV, 11.1 wt% of trifluoroacetyl-p-decylbenzene (TFADB), and 3.1 wt% of tridodecyl-methylammonium chloride (TDMACl). This carbonate ISE exhibited excellent potentiometric properties (i.e., slope: 26.3 mV/dec; selectivity: $logKT^{pot}_{CO_{2},Cl^-}$= -4.00 and $logKT^{pot}_{TCO_{2},Sal^-}$=1.69); and detection limit for $TCO_2:\;4.0{\times}10^{-4}M$). In addition, the early potentiometric properties of the solid-state sensor with optimized membrane composition were not deteriorated for more than 60 days.

• Advanced Industrial SCIence
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• v.2 no.2
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• pp.9-15
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• 2023

Since silicone rubber heaters are flexible, they can be directly attached or installed in objects to be heated even in flat, curved or three-dimensional shapes. Since the current heating method heats the entire object to be heated and raises it to a required temperature, ignoring areas or positions where heat is not required, partial intensive heating cannot be performed. When using multi-heating zones, rather than heating the entire object to be heated, only the parts that need heat are intensively heated according to the process, so it is possible to heat quickly by local location by applying different amounts of heat with a small amount of electric capacity to each place that needs heat, and heat energy can reduce. In this study, the temperature and heating time of the partially concentrated region in the multi-heating region structure are measured so that a uniform temperature or temperature difference occurs in the region requiring thermal fusion. In order to determine the optimal power density range and reduce capacitance, the safety of a silicon rubber heater manufactured with a multi-heating zone structure is investigated. If the silicon rubber heater is manufactured in a multi-heating method, the multi-intensive heating technology can be ideally applied to all heating processes.

• Journal of the Korean Wood Science and Technology
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• v.32 no.4
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• pp.1-7
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• 2004

The change in surface temperature of woodceramics, made from thinned logs of Pinus densiflora, were investigated, by the impregnation ratio and carbonizing temperature. As the surface temperature of silicon rubber heater was going up, that of woodceramics also increase rapidly. In case of heaters surface temperature at 70℃, the surface temperature of woodceramics was 53.9℃ when a sample was the impregnation ratio of 80%, while it was 54.2℃ when a sample was at 1,000℃ in carbonizing temperature, showing the highest. Also, it was found that woodceramics maintained heat for a long time because the descending velocity of their surface temperature was lower than that of the heater.

• Proceedings of the KOSOMBE Conference
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• v.1995 no.11
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• pp.26-33
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• 1995

Silicone Rubber (SR)-based potassium- and sodium-selective solid-state electrodes have been developed for the portable blood electrolyte analyzer system. The electrochemical performance of these electrodes have been evaluated with a static experimental setup and with the newly developed blood electrolyte analyzer system (model; HS603). It has been shown that their potentiometric properties are essentially comparable to those of PVC-based ion-selective electrodes, but with greatly improved lifetime (200 and 40 days for potassium and sodium sensors, respectively) and potential stability (within $\pm0.1$ mV). Clinical tests have been performed with real serum samples and the results have been compared with those obtained from Ciba-Corning BGA 288 system; correlations were excellent, proving its practical utility as a new commercial system.