Introducing Students to Energy-Efficient Mechanochemistry of Biopolymers

Aleksey Bychkov, Anna Matveeva

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

A comprehensive laboratory work that allows students to gain hands-on skills in energy-efficient mechanochemistry is described. Standard university curricula are paying very little attention to mechanochemistry, although skills in this discipline are highly demanded among chemistry graduates. In this study, a comprehensive description of mechanical destruction of α-cellulose was chosen as a model task for students to perform. The structure of cellulose is best suitable for demonstrating the effects occurring upon mechanical treatment. While being sufficiently complex (as it is characterized by high molecular weight and the presence of crystalline and amorphous regions), cellulose is simultaneously rather simple (as it consists of glucose units only and contains no branching) and allows one to consider rupturing of a macromolecule chain as the only possible mechanochemical reaction. This study employs the view commonly held in mechanochemistry that the field of mechanical forces undergoes relaxation through the following pathways: heating of the system, grinding of material, amorphization of the crystalline structure, and occurrence of mechanochemical reactions. This multilevel investigation of the process according to the "bottom up"approach has allowed the students to identify the relaxation pathways through which energy is expended during treatment of amorphous/crystalline biopolymers. It is safe to say that this approach allows the new generation of chemists not only to routinely assess and enhance the energy efficiency of the existing technologies but also to develop novel technologies employing hardly accessible and nonreactive substances.

Язык оригиналаанглийский
ЖурналJournal of Chemical Education
DOI
СостояниеПринято в печать - 2021

Предметные области OECD FOS+WOS

  • 5.03 НАУКИ ОБ ОБРАЗОВАНИИ
  • 1.04 ХИМИЧЕСКИЕ НАУКИ

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