Frequency, moisture content, and temperature dependent dielectric properties of potato starch related to drying with radio-frequency/microwave energy.

摘要: To develop advanced drying methods using radio-frequency (RF) or microwave (MW) energy, dielectric properties of potato starch were determined an open-ended coaxial-line probe and network analyzer at frequencies between 20 4,500 MHz, moisture contents 15.1% 43.1% wet basis (w.b.), temperatures 25 75 °C. The results showed that both constant (e′) loss factor (e″) dependent on frequency, content, temperature. e′ decreased with increasing frequency a given content At low (≤25.4% w.b.) (≤45 °C), e″ increased frequency. However, changed from decrease to increase high temperatures. (25–35 °C), content. (15.1–19.5% w.b.), they change trends different temperature their levels. penetration depth (d p ) RF treatments may provide potential large-scale industrial application for starch. This research offers useful information related electromagnetic energy.