Exploring the True Potential of Plant-Derived Cellulose Nanofibers
When the cellulose of plant cell walls is decomposed at the nanoscale, a novel material with exceptional mechanical and thermal properties—cellulose nanofibers (CNF)—is obtained. Our laboratory aims to deepen the structural understanding of CNF and to establish a technological framework for the precise control of advanced hierarchical structures of CNF-based materials. To this end, we focus on three continuous research domains: “Nano-Decomposition,” “Alignment,” and “Reassociation.”
In the “Nano-Decomposition” domain, we analyze defect structures of individual CNF fibrils that have not been fully characterized to date. By identifying the structural origins and process factors that induce defects, we seek to propose methods for producing defect-free CNF.
In the “Alignment” domain, we are developing techniques to freely control the arrangement of CNF within dispersions, enabling the formation of CNF-only assemblies as well as composites with resins and other materials.
In the “Reassociation” domain, we work on controlling inter-CNF bonding within assemblies and interfacial structures with resins in composites, thereby maximizing the properties of these advanced structures.
Through these efforts, we aim to elevate CNF research—which has so far centered largely on applied studies—to a new academic level, thereby supporting the broader realization of CNF’s practical applications, which remain limited at present.
Educational approach
The Importance of Fundamentals and Student-Centered Education
We believe that building a strong foundation of basic knowledge in one’s field of expertise is of utmost importance. Accordingly, our lectures emphasize the fundamentals of cellulose—its structure, properties, and reactivity. We also provide a systematic understanding of paper pulp as an industrial material, covering its manufacturing processes and varieties, as well as an overview of papermaking and wet-end chemistry. In their undergraduate theses, students are expected to master the basic handling of cellulose and paper pulp while learning the essentials of data interpretation and presentation.
At the master’s level, students are required to acquire advanced knowledge and technical skills in order to develop problem-solving abilities for research. Our lectures therefore cover the production of cellulose nanofibers (CNF), examples of cutting-edge academic research, and the current state of CNF commercialization, with the aim of raising awareness of relevant industrial challenges. Master’s thesis research is conducted under topics set by faculty members, but students are encouraged to take the initiative in addressing these problems.
In the doctoral program, students must cultivate the ability to set research questions themselves and to publish peer-reviewed original articles. Here, research problem-setting does not mean inventing entirely new topics from scratch, but rather identifying opportunities for development and deeper inquiry arising from the research in which the student has already been engaged. To foster this process, we engage in thorough discussions with students, helping them gain a deeper understanding of their research and guiding them toward meaningful research directions.
Vision for industry-academia collaboration
Structural Analysis of CNF and Development of Transparent Insulating Materials
We are engaged in research on cellulose nanofibers (CNF), with a particular focus on structural analysis at the single-fiber level and the development of transparent insulating materials derived from CNF.
