The thermal stability of the CP in natura was evaluated by thermogravimetry analyses (TG) and Derivative Thermogravimetry using a thermogravimetric Analyzer from NETZSCH, TG209F1 Libra (Netsch, Selb, Germany). Approximately 7 mg of sample were used in the TG/Derivative Thermogravimetry (DTG) analyses, with a heating rate of 10 °C/min and temperature ranging from 28 to 900 °C, under a dynamic nitrogen atmosphere and a flowrate of 20 mL/min.
The Fourier Transform infrared spectrometry (FT-IR) analysis of the CP, CPT150, and CPT200 fibers were performed using the
Frontier instrument (Perkin Elmer, Waltham, MA, USA) at a spectral range between 400–4000 cm
−1, with a resolution of 4 cm
−1.
The surface morphology of the CP, CPT150, and CPT200 fibers were characterized with a field emission scanning electron microscope (SEM-FEG),
Zeiss Auriga 40 (Zeiss, Oberkochen, Germany), with a power of 15 kV. The fibers were coated with a gold film by sprinklers.
The contact angle measurement (θ) of water and oil in samples CP, CPT150, and CPT200 were performed in a Tensiometer, model K100C (Krüss, Hamburg, Germany).
For the recording of microscopic images regarding the lumen and sorvido oil inside, we used a BIO1B binocular biological optical microscope (Bel Photonics, Monza, Italy).
Sobral Hilário L., Batista dos Anjos R., Borges de Moraes Juviniano H, & Ribeiro da Silva D. (2019). Evaluation of Thermally Treated Calotropis Procera Fiber for the Removal of Crude Oil on the Water Surface. Materials, 12(23), 3894.