Supercriticality, Glassy Dynamics, and the New Insight into Melting/Freezing Discontinuous Transition in Linseed Oil

The results of broadband dielectric spectroscopy studies of linseed oil. Studies were focused on the critical-like properties and the glassy-type dynamics. Data was collected on cooling from 323 K to 123 K and then on heating to 323 K. Complex dielectric permittivity and conductivity were measured in the frequency range from 1Hz to 10 MHz using the Novocontrol Alpha-A analyzer. Results include temperature changes in such parameters as the dielectric constant, primary relaxation times, the DC electric conductivity, the real (ε’) part of the complex dielectric permittivity, and the loss tangent.The names of the individual files correspond to the numbering of the figures in the paper: Drozd-Rzoska A, Rzoska SJ, Łoś J. Supercriticality, Glassy Dynamics, and the New Insight into Melting/Freezing Discontinuous Transition in Linseed Oil. Biophysica. 2024; 4(1):34-57. https://doi.org/10.3390/biophysica4010003 Files included in this collection:FigA1_A3 – Dielectric spectra collected in the cooling cycle – the real and imaginary parts of the complex dielectric permittivity and the real part of the complex electric conductivity versus frequency measured in the linseed oil sample.FigA2 – Dielectric spectra collected in the heating cycle – the real and imaginary parts of the complex dielectric permittivity and the real part of the complex electric conductivity versus frequency measured in the linseed oil sample.Fig01 – Results of differential scanning calorimetry (DSC) measurement of linseed oil sample.Fig02-04_06 – the real part of the complex dielectric permittivity at selected frequencies (including the dielectric constant ε=ε’(f=11 kHz)) and the low-frequency contribution of the real part of the dielectric permittivity Δ𝜀′(𝑓)=𝜀′(𝑓)−𝜀′(11 kHz) as a function of temperature measured in the linseed oil sample during the cooling cycle.Fig02_03_05_07 – the real part of the complex dielectric permittivity at selected frequencies (including the dielectric constant ε=ε’(f=11 kHz)) and the low-frequency contribution of the real part of the dielectric permittivity Δ𝜀′(𝑓)=𝜀′(𝑓)−𝜀′(11 kHz) as a function of temperature measured in the linseed oil sample during the heating cycle.Fig08-09 – the temperature changes of relaxation times determined from dielectric loss curves (the imaginary parts of the complex dielectric permittivity) collected during the cooling cycle in the linseed oil sample.Fig10 – the reciprocal of DC conductivity versus reciprocal temperature measured in the linseed oil sample during cooling and heating cycles.Fig11 – Temperature evolution of the loss factor measured in the linseed oil sample during cooling and heating cycles.

本数据集涵盖亚麻籽油的宽带介电谱（broadband dielectric spectroscopy）研究结果。本研究聚焦于类临界特性与玻璃态动力学行为。实验数据采集于从323 K降温至123 K，随后再升温回323 K的完整温度循环过程。实验采用Novocontrol Alpha-A分析仪，在1 Hz至10 MHz的频率范围内测量了复介电常数（complex dielectric permittivity）与电导率。

本研究得到的结果包含下述参数随温度的变化情况：介电常数、主松弛时间、直流（DC）电导率、复介电常数的实部（ε’）以及损耗正切。

各单个数据文件的命名与论文中的图号一一对应，相关论文信息如下：Drozd-Rzoska A, Rzoska SJ, Łoś J. Supercriticality, Glassy Dynamics, and the New Insight into Melting/Freezing Discontinuous Transition in Linseed Oil. Biophysica. 2024; 4(1):34-57. https://doi.org/10.3390/biophysica4010003

本数据集包含如下文件：
- FigA1_A3：降温循环中采集的介电谱，对应亚麻籽油样品的复介电常数实部、虚部以及复电导率实部随频率的变化关系；
- FigA2：升温循环中采集的介电谱，对应亚麻籽油样品的复介电常数实部、虚部以及复电导率实部随频率的变化关系；
- Fig01：亚麻籽油样品的差示扫描量热法（DSC）测量结果；
- Fig02-04_06：降温循环过程中，亚麻籽油样品在选定频率下的复介电常数实部（包含介电常数ε=ε’(f=11 kHz)），以及介电常数实部的低频贡献项Δ𝜀′(𝑓)=𝜀′(𝑓)−𝜀′(11 kHz)随温度的变化关系；
- Fig02_03_05_07：升温循环过程中，亚麻籽油样品在选定频率下的复介电常数实部（包含介电常数ε=ε’(f=11 kHz)），以及介电常数实部的低频贡献项Δ𝜀′(𝑓)=𝜀′(𝑓)−𝜀′(11 kHz)随温度的变化关系；
- Fig08-09：亚麻籽油样品降温循环过程中，通过介电损耗曲线（复介电常数虚部）拟合得到的松弛时间随温度的变化情况；
- Fig10：亚麻籽油样品在降温和升温循环中测得的直流电导率倒数随温度倒数的变化关系；
- Fig11：亚麻籽油样品在降温和升温循环中测得的损耗因子随温度的演化情况。