研究目的
Investigating the terahertz (THz) spectroscopy of paramylon and paramylon-ester extracted from microalgae called Euglena, and comparing their absorption spectra with cellulose to understand the differences caused by their chain structures.
研究成果
The THz spectroscopy is very useful for identifying the degree of disorder in polymeric materials. The differences in THz absorption features between paramylon, paramylon-ester, and cellulose are attributed to their different chain structures and the degree of disorder caused by esterification. Further detailed study is needed to elucidate the microscopic origin of these differences.
研究不足
The study only measured one type of paramylon-ester with a degree of substitution of 2.6. The broader peaks in paramylon-ester spectra are not fully understood, indicating a need for further detailed study.
1：Experimental Design and Method Selection:
The study used Fourier Transform Infrared Spectrometer (FT-IR) to measure THz spectra of paramylon, paramylon-ester, and cellulose.
2：Sample Selection and Data Sources:
Paramylon powder was extracted from Euglena, and paramylon-ester was synthesized from paramylon. Cellulose powder was purchased.
3：List of Experimental Equipment and Materials:
FAIRS-1 THz spectrometer, mercury lamp, Si-bolometer, Rigaku X-ray diffractometer with PANalytical X’Pert detector.
4：Experimental Procedures and Operational Workflow:
Samples were crushed into sub-micron size particles, pressed into thin pellets, and their absorption spectra were recorded. XRD spectra were also measured.
5：Data Analysis Methods:
The absorption spectra were analyzed by comparing them with cellulose, and XRD patterns were analyzed to understand the crystalline structure.
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